WO2001067199A1 - Device for controlling power distribution to subsystems - Google Patents
Device for controlling power distribution to subsystems Download PDFInfo
- Publication number
- WO2001067199A1 WO2001067199A1 PCT/US2000/010306 US0010306W WO0167199A1 WO 2001067199 A1 WO2001067199 A1 WO 2001067199A1 US 0010306 W US0010306 W US 0010306W WO 0167199 A1 WO0167199 A1 WO 0167199A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- power
- sensing
- threshold
- current
- current level
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/005—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting using a power saving mode
Definitions
- the present invention relates to devices ⁇ controlling a distribution 01 (J ower to subsystems, for example to a main device and at least one secondary device or a plurality of secondary devices.
- the present invention relates to the above mentioned devices formed as electrical power strips and power control sensors which can be used with new devices having two modes of - operation, standby or off and full on, with the use of main device or secondary devices.
- One type of an electrical distribution device is the power strip or power control center, which generally comprises of a row of power outlets, switched or unswitched, to distribute power to a primary device and secondary device(s) from a standard outlet (e.g., wall outlet).
- a standard outlet e.g., wall outlet.
- Some power strips and control centers contain options like circuit breakers, fuses and/or surge protectors, for example.
- the system can turn itself off and is controlled by the operating system.
- the system shutdown there is a delay in which the operator must wait for the system to finish before turning off the secondary device(s).
- this can be a long time.
- the user may leave after the shutdown is started.
- the secondary device(s) will be turned off.
- each device When used with computer devices, each device is plugged into a separate outlet with the computer plugged into the main outlet. When the computer is turned on, the current level increases to a high enough level to turn on the secondary device(s).
- Other constant pow )utlets may also be included T ⁇ r wake up devices, such as modems capable of bringing the system out of standby mode.
- J.S. Pat. No. 4,659,941 discloses a power strip where the main outlet current controls the secondary device(s) as shown in Fig. 2.
- the secondary switch and trigger device are the same.
- the main device must draw current at the start of each cycle of line power for the triac to trigger correctly. With high efficiency supplies, this is never the case because they only draw power during the peak voltage of the line power. So, when used with a PC or newer video/audio equipment, the voltage to the secondary outlets will not be a sine wave like the voltage from the wall outlet. This waveform can damage the secondary device(s).
- the second problem is personal computers and newer video/audio equipment do not turn off completely, but remain in a standby mode so they can turn themselves on at a given time or occurrence. Because of this, the secondary device(s) will never be turned off, defeating the purpose of the power strip's use.
- U.S. Pat. No. 4,731 ,549 and U.S. Pat. No. 4,970,623 are methods for controlling secondary device(s). Both require internal power supplies and many components, making them too expensive for mass production and difficult to fit in a standard power strip.
- a device for controlling a power distribution to subsystems which has a power input to connected to a power source, a primary power output to be connected to a primary device, at least one secondary power output to be connected to at least one secondary device, sensing means for sensing when a current level falls below a threshold r esponse to the primary device being turned off and when the level current raises above a threshold in response to the primary device being turned on, and executing means operatively connected with said sen r ng means and operative for .
- the inventive device further has time delay means which is located between said sensing means and said executing means and is operative for delaying interruption of power supply or supply of power to the at least one secondary device in response to the sensing of the current level below the threshold or above the threshold by the sensing means correspondingly.
- the time delay means can be formed as a capacitor and resistors arranged between the sensing means and the executing means
- the sensing means can be formed as a current sensing resistor arranged in series with a power input of the device and a t ⁇ ac connected to the resistor, for example through another resistor
- the executing means can be formed for example as a solid state DC relay, as an AC mechanical relay, as a solid state AC relay, etc
- Figure 1 is a view showing a device for controlling a power distribution to subsystems in accordance with one of the present ⁇ nven...jn;
- Figure 2 is a view showing a distribution control device in accordance w . the prior art
- Figure 3 is a view showing the inventive device in accordance with another embodiment of the present invention.
- Figure 4 is a view showing the inventive device in accordance with still a further embodiment of the present invention.
- Figure 5 is a view showing the inventive device with a power source, a main subsystem and secondary subsystems;
- Figure 6 is a view showing the inventive device in accordance with still another embodiment of the present invention
- Figure 7 is a view substantially corresponding to the view of Figure 6, but showing a modification of the inventive device of Figure 6;
- Figure 8 is a view showing the inventive device in accordance with still a further embodiment of the present invention.
- Figure 9 is a view substantially corresponding to the view of Figure 8 but showing a modification of the device of Figure 8.
- a device for distributing power to subsystems in accordance with one embodiment of the present invention as shown in Figure 1 has a power input (PI) which is connectable to an AC power source.
- a current sensing resistor (R1 ) converts the current drawn by a mam system or device connected to a main power output (MPO), into a voltage
- the current sensing resistor (R1 ) is arranged in series with the mam power output (MPO).
- Diodes (D1 ) are placed in parallel with the resistor (R1 ) to limit the power to the resistor, by limiting the voltage on the resistor to two diode drops or about 1 2 volts
- the diodes (D1 ) a placed in both directions the current through the resistor (R1 ) may be alternating
- the voltage across the current nsmg resistor, created by tL Mon main device power level exceeds the gate trigger voltage of the triac (Q1 )
- a current flows through the gate protection resistor (R2) and the gate of the triac (Q1 )
- Current through the gate of the tr ⁇ ac(Q1 ) will cause the tr ⁇ ac(Q1 ) to switch on Current now flows through the triac (Q1 ), current limiting resistor (R3), and the bridge rectifier (D2) to charge the capacitor (C1 )
- the current limiting resistor (R3) limits the current to the triac (Q1 ) and the
- the output of the optical isolator (ISO1 ) is connected to the gate of the triac (Q2).
- the optical isolator (ISO1 ) turns on, it triggers the triac (Q2) supplying power to the secondar ->ower outlet(s). With power , . W applied the secondary device(s) will now turn on.
- An optional protection resistor (R5) or fuse may be placed in series with the output of the optical isolator (ISO1 ) for safety.
- the current sensing resistor (R1 ) together with the triac (Q1 ) constitute sensing means which sense a current level below or above a predetermined threshold
- the solid state relay constitutes executing means which, in response to the sensing of the current level by the sensing means interrupts the current supply to the secondary device(s) when the sensed level is below the threshold as a result of turning off of the primary device or supplies the current to the secondary device(s) when the current level sensed by the sensing means is above the threshold as a result of turning on of the primary device.
- Figure 3 shows another embodiment of the inventive device. It substantially corresponds to the embodiment of Figure 1 .
- the output of the triac (Q1 ) is connected directly to the relay.
- the relay can be a mechanical relay or a solid state relay.
- Figure 4 shows another embodiment of the device in accordance with the present invention. In this embodiment the output of the triac (Q1 ) is phased shifted to drive the triac (Q2) directly.
- the current limiting resistor (R3) the capacitor (C1 ), the current limiting resistor (R4) and the second triac (Q2) together form a solid state AC relay.
- Figure 5 shows the inventive device connected to an AC power source, the main device and the secondary devices.
- FIG 6 shows a further embodiment of the device in accordance with the present invention.
- a mechanical current driven relay (RL1 ) is used to control the secondary device (S).
- the relay (RL1 ) When the magnetic field reaches a threshold determined by the mechanical configuration of the relay (RL1 ), the relay (RL1 ) will close.
- the relay (RL1 ) closes, it supplies power to the secondary device ' l
- the windings of the relay . ⁇ _1 ) are of a low impedance, so that the functioning of the primary device is not affected.
- the windings should be able to handle the full rated current of the power str
- limiting protection devices can be used as shown in Figure 7.
- the limiting protection device includes diodes (D1 , D2).
- FIG. 8 shows a further embodiment of the present invention. This embodiment is substantially similar to the embodiment of Figure 6. The difference is that the current driven relay (RL1 ) is replaced in the embodiment of Figure 8 with a thermal relay that can be made with, for example, a bimetallic switch. The current drawn by the main device is converted to heat. When the heat reaches the threshold determined by the mechanical configuration (RL1 ), it will cause the relay (RL1 ) to close. When the relay (RL1 ) closes, it supplies power to the secondary device (S). Such an approach is better than the use of the magnetic relay, because a thermal device has an inherent time delay.
- the time delay in turning on and off the secondary device (S) will help prevent false turn ons and turn offs.
- the heating element should withstand the full current of the strip.
- power limiting devices like diodes (D1 , D2) can be used again forthe same reason as in Figure 7.
- the device in accordance with the present invention can be used on many different voltages, including but not limited to 100, 120 and 220 Vac, for domestic and international use.
- the triac (Q1 ) transistors orother switching devices can be used.
- separate diodes can be used instead of the diode bridges.
- the diodes (D1 ) also can be replaced by any voltage limiting device.
Abstract
A device for controlling power distributions to subsystems comprising a power input (P1) to be connected to a power source and a primary power output (MPO) and a secondary output (SPO) operated in response to operation of the primary power output (MPO).
Description
Device For Controlling Power Distribution to Subsystems
Technical Field The present invention relates to devices τ controlling a distribution 01 (Jower to subsystems, for example to a main device and at least one secondary device or a plurality of secondary devices.
More particularly, the present invention relates to the above mentioned devices formed as electrical power strips and power control sensors which can be used with new devices having two modes of - operation, standby or off and full on, with the use of main device or secondary devices.
Background Art One type of an electrical distribution device is the power strip or power control center, which generally comprises of a row of power outlets, switched or unswitched, to distribute power to a primary device and secondary device(s) from a standard outlet (e.g., wall outlet). Some power strips and control centers contain options like circuit breakers, fuses and/or surge protectors, for example.
In newer personal computers the system can turn itself off and is controlled by the operating system. During the system shutdown, there is a delay in which the operator must wait for the system to finish before turning off the secondary device(s). Depending on the operating software and programs, this can be a long time. Using this invention, the user may leave after the shutdown is started. When the system finishes and switches off or to the standby mode, the secondary device(s) will be turned off.
When used with computer devices, each device is plugged into a separate outlet with the computer plugged into the main outlet. When the
computer is turned on, the current level increases to a high enough level to turn on the secondary device(s). Other constant pow )utlets may also be included Tυr wake up devices, such as modems capable of bringing the system out of standby mode.
J.S. Pat. No. 4,659,941 discloses a power strip where the main outlet current controls the secondary device(s) as shown in Fig. 2. Here, the secondary switch and trigger device are the same. In this configuration, the main device must draw current at the start of each cycle of line power for the triac to trigger correctly. With high efficiency supplies, this is never the case because they only draw power during the peak voltage of the line power. So, when used with a PC or newer video/audio equipment, the voltage to the secondary outlets will not be a sine wave like the voltage from the wall outlet. This waveform can damage the secondary device(s). The second problem is personal computers and newer video/audio equipment do not turn off completely, but remain in a standby mode so they can turn themselves on at a given time or occurrence. Because of this, the secondary device(s) will never be turned off, defeating the purpose of the power strip's use.
U.S. Pat. No. 4,731 ,549 and U.S. Pat. No. 4,970,623 are methods for controlling secondary device(s). Both require internal power supplies and many components, making them too expensive for mass production and difficult to fit in a standard power strip.
Description of the Invention Accordingly, it is an object of present invention to provide a device for controlling distribution of power to subsystems, which avoids the disadvantages of the prior art.
In keeping with these objects and with others which will become apparent hereinafter, one feature of present invention resides, briefly stated, in a device for controlling a power distribution to subsystems which has a power input to connected to a power source, a primary power output to be connected to a primary device, at least one secondary power
output to be connected to at least one secondary device, sensing means for sensing when a current level falls below a threshold r esponse to the primary device being turned off and when the level current raises above a threshold in response to the primary device being turned on, and executing means operatively connected with said senr ng means and operative for . ,terruptιng a power supply to said at least one secondary device when the sensing means sense the current level below the threshold and supplying power to said at least one secondary device when said sensing means sense the current level above the threshold In accordance with a further feature of present invention, the inventive device further has time delay means which is located between said sensing means and said executing means and is operative for delaying interruption of power supply or supply of power to the at least one secondary device in response to the sensing of the current level below the threshold or above the threshold by the sensing means correspondingly. The time delay means can be formed as a capacitor and resistors arranged between the sensing means and the executing means
In accordance with a further embodiment of the present invention, the sensing means can be formed as a current sensing resistor arranged in series with a power input of the device and a tπac connected to the resistor, for example through another resistor
The executing means can be formed for example as a solid state DC relay, as an AC mechanical relay, as a solid state AC relay, etc
The novel features which are considered as characteristic for the present invention are set forth in particular in the appended claims The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings
Brief Description of the Drawings
Figure 1 is a view showing a device for controlling a power distribution to subsystems in accordance with one
of the present ιnven...jn;
Figure 2 is a view showing a distribution control device in accordance w . the prior art;
Figure 3 is a view showing the inventive device in accordance with another embodiment of the present invention;
Figure 4 is a view showing the inventive device in accordance with still a further embodiment of the present invention;
Figure 5 is a view showing the inventive device with a power source, a main subsystem and secondary subsystems;
Figure 6 is a view showing the inventive device in accordance with still another embodiment of the present invention; Figure 7 is a view substantially corresponding to the view of Figure 6, but showing a modification of the inventive device of Figure 6;
Figure 8 is a view showing the inventive device in accordance with still a further embodiment of the present invention; and
Figure 9 is a view substantially corresponding to the view of Figure 8 but showing a modification of the device of Figure 8.
Best Mode of Carrying Out the Invention A device for distributing power to subsystems in accordance with one embodiment of the present invention as shown in Figure 1 has a power input (PI) which is connectable to an AC power source. A current sensing resistor (R1 ) converts the current drawn by a mam system or device connected to a main power output (MPO), into a voltage The current sensing resistor (R1 ) is arranged in series with the mam power output (MPO). Diodes (D1 ) are placed in parallel with the resistor (R1 ) to
limit the power to the resistor, by limiting the voltage on the resistor to two diode drops or about 1 2 volts The diodes (D1 ) a placed in both directions
the current through the resistor (R1 ) may be alternating When the voltage across the current nsmg resistor, created by tL„ main device power level, exceeds the gate trigger voltage of the triac (Q1 ), a current flows through the gate protection resistor (R2) and the gate of the triac (Q1 ) Current through the gate of the trιac(Q1 ) will cause the trιac(Q1 ) to switch on Current now flows through the triac (Q1 ), current limiting resistor (R3), and the bridge rectifier (D2) to charge the capacitor (C1 ) The current limiting resistor (R3) limits the current to the triac (Q1 ) and the bridge rectifier (D2) as well as forming a resistive capacitive time constant to slow down the charging of the capacitor (C1 ) This helps prevent false triggers as well as creating a turn on time delay for secondary systems system(s), if wanted The energy now stored in capacitor (C1 ) turns on a relay to control power supply to secondary power outputs (SPO), to which the secondary system (device) or secondary systems (devices) are connected Even though a mechanical relay can be used, a solid state relay is preferred for reliability and because it can contain a zero crossing detector to help with the secondary surge turn on current The energy stored in capacitor (C1 ) will keep the relay on during the times when triac (Q1 ) is off due to the non full wave current use characteristics of the mam device The energy stored in capacitor (C1 ) can also be used for full wave triggering of the secondary devιce(s) even when the mam device uses only a half cycle of each full cycle of the incoming power and for creating a time delay when turn off power to the secondary devices In the solid state relay the current limiting resistor (R4) protects the optical isolator's (ISO1 ) input diode from the voltage on the capacitor (C1 ) When current from the capacitor (C1 ), through the resistor (R4), to the input diode of the optical isolator (ISO1 ) becomes large enough it will turn on the optical isolator (ISO1 ) The resistor (R4) also forms the turn off resistive capacitive time constant with the capacitor (C1 ) by limiting the discharge current This allows the turn off time of the optical isolator (ISO1 ) and the secondary system(s) to be delayed
The optical isolator (ISO1 ) may contain a zero cross detector to help with turn on surge currents of the secondary r /ice(s) and help prevent noit. spikes. The output of the optical isolator (ISO1 ) is connected to the gate of the triac (Q2). When the optical isolator (ISO1 ) turns on, it triggers the triac (Q2) supplying power to the secondar ->ower outlet(s). With power , . W applied the secondary device(s) will now turn on. An optional protection resistor (R5) or fuse may be placed in series with the output of the optical isolator (ISO1 ) for safety. In the above described embodiment the current sensing resistor (R1 ) together with the triac (Q1 ) constitute sensing means which sense a current level below or above a predetermined threshold, while the solid state relay constitutes executing means which, in response to the sensing of the current level by the sensing means interrupts the current supply to the secondary device(s) when the sensed level is below the threshold as a result of turning off of the primary device or supplies the current to the secondary device(s) when the current level sensed by the sensing means is above the threshold as a result of turning on of the primary device.
Figure 3 shows another embodiment of the inventive device. It substantially corresponds to the embodiment of Figure 1 . However, in the device in accordance with the embodiment of Figure 3, the output of the triac (Q1 ) is connected directly to the relay. The relay can be a mechanical relay or a solid state relay. Figure 4 shows another embodiment of the device in accordance with the present invention. In this embodiment the output of the triac (Q1 ) is phased shifted to drive the triac (Q2) directly. Here the current limiting resistor (R3) the capacitor (C1 ), the current limiting resistor (R4) and the second triac (Q2) together form a solid state AC relay. Figure 5 shows the inventive device connected to an AC power source, the main device and the secondary devices. Figure 6 shows a further embodiment of the device in accordance with the present invention. Here a mechanical current driven relay (RL1 ) is used to control the secondary device (S). When the magnetic field reaches a threshold determined by the mechanical
configuration of the relay (RL1 ), the relay (RL1 ) will close. When the relay (RL1 ) closes, it supplies power to the secondary device ' l The windings of the relay .ι_1 ) are of a low impedance, so that the functioning of the primary device is not affected. For safety purpose, the windings should be able to handle the full rated current of the power str Alternatively, limiting protection devices can be used as shown in Figure 7. In this figure the limiting protection device includes diodes (D1 , D2). The diodes (D1 , D2) are placed in opposite directions because the current is alternating and must be limited in both directions. Figure 8 shows a further embodiment of the present invention. This embodiment is substantially similar to the embodiment of Figure 6. The difference is that the current driven relay (RL1 ) is replaced in the embodiment of Figure 8 with a thermal relay that can be made with, for example, a bimetallic switch. The current drawn by the main device is converted to heat. When the heat reaches the threshold determined by the mechanical configuration (RL1 ), it will cause the relay (RL1 ) to close. When the relay (RL1 ) closes, it supplies power to the secondary device (S). Such an approach is better than the use of the magnetic relay, because a thermal device has an inherent time delay. The time delay in turning on and off the secondary device (S) will help prevent false turn ons and turn offs. As with the magnetic delay, the heating element should withstand the full current of the strip. Alternatively, as shown in Figure 9, power limiting devices like diodes (D1 , D2) can be used again forthe same reason as in Figure 7. It is to be understood that the device in accordance with the present invention can be used on many different voltages, including but not limited to 100, 120 and 220 Vac, for domestic and international use. Instead of the triac (Q1 ) transistors orother switching devices can be used. Also, separate diodes can be used instead of the diode bridges. The diodes (D1 ) also can be replaced by any voltage limiting device. It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of constructions differing from the types described above.
While the invention has been illustrated and described as embodied in device for controlling power distribution to subsystems, it is not intended t e limited to the details shown, since vario..-. modifications and structural changes may be made without departing in any way from the spirit of the present invention . out further analysis, the foregoing will so lully reveal the gist of the present invention that others can, by applying current knowledge, readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims
Claims
A d ce for controlling a power distribution to subsystems, compπsinq a power input to be connected to a power source, a primary power output to be connected to a prim? device, at least one - -.condary power output to be connected to at least one secondary system, sensing means for sensing when a current level falls below a threshold in response to the primary device being turned off and when the current level raises above a threshold in response to the primary device being turned on, and executing means operatively connected with said sensing means and operative for interrupting a power supply to said at least one secondary device when the sensing means sense the current level below the threshold and supplying power to said at least one secondary device when said sensing means sense the current level above the threshold correspondingly.
A device as defined in claim 1 , and further comprising time delay means which is located between said sensing means and said executing means and is operative for delaying interruption of power or supply of power to the at least one secondary device in response to the sensing of the current level below the threshold or above the threshold by the sensing means correspondingly
A device as defined in claim 2, wherein said time delay means include a capacitor and resistors located between said sensing means and said executing means
A device as defined in claim 1 , wherein said executing means includes a DC relay
A device as defined in claim 1 , wherein said executing means include' 3 mechanical AC relay.
A device as defined in claim 1 , wherein said executing means includes a solid state AC relay.
7. A device as defined in claim 1 , wherein said sensing means includes a current sensing resistor arranged in series with said primary power output, and a triac connected to said resistor and to said executing means.
A device as defined in claim 7, wherein said current sensing resistor is formed so as to convert current into voltage; and further comprising means for limiting voltage across said current sensing resistor.
9. In combination with an electrical power source a primary device, and at least one secondary device, a device for controlling a power distribution comprising a power input to be connected to the power source; a primary power output to be connected to the at least one secondary device; sensing means for sensing when a current level falls below a threshold in response to the primary device being turned off and when the current level raises above a threshold in response to the primary device being turned on; and executing means operatively connected with said sensing means and operative for interrupting a power supply to said at least one secondary device when the sensing means sensp the current level belo' the threshold and supply power to said at least one secondary device when said sensing means sense the current level above the threshold.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2000242482A AU2000242482A1 (en) | 2000-03-07 | 2000-04-17 | Device for controlling power distribution to subsystems |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/521,029 US6528902B1 (en) | 2000-03-07 | 2000-03-07 | Device for controlling power distribution to subsystems |
US09-521,029 | 2000-03-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001067199A1 true WO2001067199A1 (en) | 2001-09-13 |
Family
ID=24075035
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2000/010306 WO2001067199A1 (en) | 2000-03-07 | 2000-04-17 | Device for controlling power distribution to subsystems |
Country Status (3)
Country | Link |
---|---|
US (1) | US6528902B1 (en) |
AU (1) | AU2000242482A1 (en) |
WO (1) | WO2001067199A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015173369A1 (en) * | 2014-05-14 | 2015-11-19 | Barco Nv | Energy efficient power sequencer control circuit |
Families Citing this family (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6735705B1 (en) * | 2000-10-30 | 2004-05-11 | Thomas E. Egbert | Power control circuits with enhanced nonlinear current sensing |
CA2353013A1 (en) * | 2001-07-10 | 2003-01-10 | Chin-Chung Tai | Ac adapter for computer |
US6759762B2 (en) * | 2002-05-10 | 2004-07-06 | Bits Ltd | Device for controlling power distribution to subsystems |
US6759763B2 (en) * | 2002-05-10 | 2004-07-06 | Bits Ltd | Apparatus for controlling power distribution to devices |
US20050012401A1 (en) * | 2003-07-17 | 2005-01-20 | Goodrich Patrick D. | Switched outlet module and method therefor |
CA2449635A1 (en) * | 2003-11-18 | 2005-05-18 | Electronic System Integrators Pty Ltd. | Power connector |
US20050157451A1 (en) * | 2004-01-16 | 2005-07-21 | Chin-Chang Kuo | Intelligent power socket |
ITMI20050521A1 (en) * | 2005-03-30 | 2006-09-30 | Arti & Mestieri S N C I Legni | CONNECTING DEVICE FOR DOMESTIC ELECTRICAL EQUIPMENT WITH AN ELECTRICITY DISTRIBUTION NETWORK |
GB2427513B (en) * | 2005-06-21 | 2007-08-01 | Peter Robertson | An improved sensing socket assembly |
US7375939B2 (en) * | 2006-08-21 | 2008-05-20 | Trippe Manufacturing Co. | Relocatable power tap with ground-neutral fault detector |
US20090146494A1 (en) * | 2007-10-03 | 2009-06-11 | Belkin International, Inc. | Apparatus For Providing Electrical Power To Electrical Device And Method Of Use |
US7764517B2 (en) * | 2007-11-02 | 2010-07-27 | National Semiconductor Corporation | Power supply with reduced power consumption when a load is disconnected from the power supply |
US9776296B2 (en) | 2008-05-09 | 2017-10-03 | Milwaukee Electric Tool Corporation | Power tool dust collector |
US8967923B2 (en) | 2012-01-13 | 2015-03-03 | Aeg Electric Tools Gmbh | Dust suction device for drilling machine |
WO2009140404A2 (en) * | 2008-05-13 | 2009-11-19 | Igo , Inc. | Circuit and method for ultra-low idle power |
US7779278B2 (en) * | 2008-05-29 | 2010-08-17 | Igo, Inc. | Primary side control circuit and method for ultra-low idle power operation |
US7770039B2 (en) * | 2008-05-29 | 2010-08-03 | iGo, Inc | Primary side control circuit and method for ultra-low idle power operation |
US7795760B2 (en) * | 2008-07-25 | 2010-09-14 | Igo, Inc. | Load condition controlled power module |
US7800252B2 (en) * | 2008-06-27 | 2010-09-21 | Igo, Inc. | Load condition controlled wall plate outlet system |
US7795759B2 (en) * | 2008-06-27 | 2010-09-14 | iGo, Inc | Load condition controlled power strip |
TWI364143B (en) * | 2008-10-22 | 2012-05-11 | An outlet apparatus with power classification management | |
US20100201207A1 (en) * | 2009-02-06 | 2010-08-12 | Bruce Barton | Apparatus for controlling electrical power distribution to charging devices |
DK2474092T3 (en) * | 2009-09-03 | 2020-07-27 | Dpm Tech Inc | VARIABLE COIL CONFIGURATION SYSTEM, APPARATUS AND PROCEDURE |
US20110276289A1 (en) * | 2010-05-07 | 2011-11-10 | Samsung Electronics Co., Ltd. | Power monitoring apparatus for household appliance |
US20140191573A1 (en) * | 2011-09-24 | 2014-07-10 | Kool Koncepts Limited | Energy management system |
US8981594B2 (en) * | 2012-01-12 | 2015-03-17 | Global Win Technology Co., Ltd. | Advance power-saving power socket for power saving system |
CN110663162B (en) | 2017-05-23 | 2022-09-09 | Dpm科技有限公司 | Variable coil configuration system control, apparatus and method |
WO2020215154A1 (en) | 2019-04-23 | 2020-10-29 | Dpm Technologies Inc. | Fault tolerant rotating electric machine |
EP4315556A1 (en) | 2021-05-04 | 2024-02-07 | Exro Technologies Inc. | Battery control systems and methods |
EP4324089A1 (en) | 2021-05-13 | 2024-02-21 | Exro Technologies Inc. | Method and apparatus to drive coils of a multiphase electric machine |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3416001A (en) * | 1967-09-01 | 1968-12-10 | David N. Fistell | Additional equipment controls for record players |
US4054802A (en) * | 1976-10-04 | 1977-10-18 | General Motors Corporation | Power control circuit |
US4825140A (en) * | 1988-05-03 | 1989-04-25 | St Louis Raymond F | Power tool/vacumm cleaner power control |
US5099157A (en) * | 1988-06-10 | 1992-03-24 | Milwaukee Electric Tool Corporation | Master/slave circuit employing triacs |
US5120983A (en) * | 1988-07-05 | 1992-06-09 | Bsg-Schalttechnik Gmbh & Co, Kg | Device for starting automatically an auxiliary unit when switching on a main unit |
US5256906A (en) * | 1991-04-19 | 1993-10-26 | Makita Corporation | Mechanism for switching from independent to synchronous, or vice versa the operational setting of a dust collector with a receptacle for supplying another power tool with which the dust collector is to be operated synchronously |
US5270576A (en) * | 1992-03-06 | 1993-12-14 | Compulog Corporation | Electrical connector network |
US5541457A (en) * | 1995-06-12 | 1996-07-30 | Morrow; Rodney J. | Electrical current actuated accessory outlet |
US5563455A (en) * | 1995-02-27 | 1996-10-08 | Sun Microsystems, Inc. | Method and apparatus for sequencing and controlling power distribution |
US5731947A (en) * | 1995-01-19 | 1998-03-24 | Hirose; Fuminori | Electricity tapping apparatus which automatically turns on the slave units by sensing the power status of the master unit |
US5955791A (en) * | 1997-04-14 | 1999-09-21 | Irlander; James E. | Master/slave circuit for dust collector |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4659941A (en) * | 1985-07-19 | 1987-04-21 | The United States Of America As Represented By The Secretary Of The Air Force | Power sensing device |
-
2000
- 2000-03-07 US US09/521,029 patent/US6528902B1/en not_active Expired - Fee Related
- 2000-04-17 WO PCT/US2000/010306 patent/WO2001067199A1/en active Application Filing
- 2000-04-17 AU AU2000242482A patent/AU2000242482A1/en not_active Abandoned
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3416001A (en) * | 1967-09-01 | 1968-12-10 | David N. Fistell | Additional equipment controls for record players |
US4054802A (en) * | 1976-10-04 | 1977-10-18 | General Motors Corporation | Power control circuit |
US4825140A (en) * | 1988-05-03 | 1989-04-25 | St Louis Raymond F | Power tool/vacumm cleaner power control |
US5099157A (en) * | 1988-06-10 | 1992-03-24 | Milwaukee Electric Tool Corporation | Master/slave circuit employing triacs |
US5120983A (en) * | 1988-07-05 | 1992-06-09 | Bsg-Schalttechnik Gmbh & Co, Kg | Device for starting automatically an auxiliary unit when switching on a main unit |
US5256906A (en) * | 1991-04-19 | 1993-10-26 | Makita Corporation | Mechanism for switching from independent to synchronous, or vice versa the operational setting of a dust collector with a receptacle for supplying another power tool with which the dust collector is to be operated synchronously |
US5270576A (en) * | 1992-03-06 | 1993-12-14 | Compulog Corporation | Electrical connector network |
US5731947A (en) * | 1995-01-19 | 1998-03-24 | Hirose; Fuminori | Electricity tapping apparatus which automatically turns on the slave units by sensing the power status of the master unit |
US5563455A (en) * | 1995-02-27 | 1996-10-08 | Sun Microsystems, Inc. | Method and apparatus for sequencing and controlling power distribution |
US5541457A (en) * | 1995-06-12 | 1996-07-30 | Morrow; Rodney J. | Electrical current actuated accessory outlet |
US5955791A (en) * | 1997-04-14 | 1999-09-21 | Irlander; James E. | Master/slave circuit for dust collector |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015173369A1 (en) * | 2014-05-14 | 2015-11-19 | Barco Nv | Energy efficient power sequencer control circuit |
US10600384B2 (en) | 2014-05-14 | 2020-03-24 | Barco Nv | Energy efficient power sequencer control circuit |
Also Published As
Publication number | Publication date |
---|---|
US6528902B1 (en) | 2003-03-04 |
AU2000242482A1 (en) | 2001-09-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2001067199A1 (en) | Device for controlling power distribution to subsystems | |
US6501195B1 (en) | Device for controlling power distribution to subsystems | |
US4999728A (en) | Power surge protection circuit | |
JPH08140260A (en) | Power supply | |
US7482708B1 (en) | Apparatus for controlling power distribution two subsystems | |
US20020185916A1 (en) | Apparatus for controlling power distribution to devices | |
US6759762B2 (en) | Device for controlling power distribution to subsystems | |
CA1289227C (en) | Method and apparatus for accommodating power disturbances | |
US6141198A (en) | Solid state overload relay | |
CA2416338C (en) | Power supply start up circuit | |
US5303160A (en) | Load controller with digitally modeled overload protection and analog tracking of heat state during power off | |
EP0995251B1 (en) | Solid state overload relay | |
US10353412B2 (en) | Power harvesting circuit employing saturable core transformer | |
JP2006304557A (en) | Protection circuit and power supply device | |
US3979644A (en) | Overvoltage protection arrangement | |
US10048708B2 (en) | Power harvesting circuit employing a saturable core transformer | |
KR100714546B1 (en) | Power supply apparatus with high speed reset of standby power | |
KR101402062B1 (en) | Apparatus for breaking stand-by power with excellent energy saving efficiency | |
US20090206665A1 (en) | Apparatus for controlling electrical power distribution between a primary device and at least one secondary device | |
JP4006910B2 (en) | Power supply | |
JP2712369B2 (en) | DC power supply | |
KR100919450B1 (en) | The circuit braker used seperated power between detection of the electronic leakage and driving tripcoil | |
CN2248412Y (en) | Multi-function automatic protecting voltage stabilizer for overload and short-circuit | |
KR0147219B1 (en) | Low voltage protection circuit of power supply system | |
JP2594620Y2 (en) | Automatic demagnetizing current on / off circuit |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AU BR CA CN IL JP KR UA US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
122 | Ep: pct application non-entry in european phase | ||
NENP | Non-entry into the national phase |
Ref country code: JP |