DE102005022648A1 - Industrial system comprising electrical current-using equipment, has contactless supply of power using inductive coupling to primary conductors - Google Patents

Abstract

The current-using equipment is supplied with power in a contactless manner using respective inductive couplings to one or more primary conductors of a section of a primary conductor system. The sections are coupled together by inductive coupling devices. The industrial system may be divided into joinable parts, each having at least one section. Primary conductors of the connected system parts overlap, and a ferrite coupling element is provided to increase the magnetic coupling between overlapping conductors. An independent claim is included for a current-using apparatus.

Description

The The invention relates to a consumer and a system.

In industrial equipment is known, electrical consumers, such as for example, electronic devices, Lighting devices, drives, machines and the like, from a grid, in particular with alternating current of 50 or 60 Hz. Consumers are usually more expensive Connectors mechanically connected and electrically connected. Furthermore has such a plant or machine usually for each drive a tee as energy diversion on. These tees are costly to install and expensive, especially when in high degree of protection for be used in the wet area or even the aseptic area have to. These tees are also called distribution boxes and often also include other device parts, such as for example, emergency stop switch. Thus, they are expensive and expensive, especially with regard to installation.

Of the Invention is therefore based on the object, a simpler and cost-effective Cabling in electrical consumers and equipment to create.

According to the invention Task in the electrical consumer according to claim 20 and dissolved in the system according to the features specified in claim 1.

basics Features of the invention in the electrical consumer are that he includes an electronic circuit for supply, wherein the Consumer means for its inductive supply from a primary conductor system includes, wherein the primary conductor system comprises at least two sections, which have means for inductive coupling coupled together.

From The advantage here is that the consumer is tight and in a high degree of protection in cheaper Way executable is. The non-contact Supply to the consumer namely the housing easy and simple, especially without bumps or connectors, perform and thus a drain to allow for water and to prevent the settling of solids. Especially It is thus usable in wet areas and aseptic areas. The time, which for the wiring is necessary is reducible with the invention. Farther are leakage currents, which occur with conventional plug cabling, prevents so that an improved electromagnetic compatibility arises.

Further It is advantageous that the supply to the potential-free potential is and the otherwise in plants existing potential carryover as well as radio interference suppression with disconnectors omitted. In addition, a reactive power compensation, especially in the consumer and thus the alternating current has smaller values, which is why smaller cable diameters are provided at the primary conductor and thus lower cabling costs can be achieved. disconnectors are unnecessary, since a separation by pulling out of the primary conductor is replaceable.

Furthermore are within the primary conductor system Means for magnetic coupling usable, the low Have air gap. Therefore, a multiple series circuit is possible without huge Energy loss. In stationary Systems and plant components is therefore an efficient magnetic coupling possible with or without a small air gap, so that a series connection several magnetically coupled electrical circuits technically makes sense becomes.

One Short circuit in a section loads the feed Not. Because every section of the route is self-contained Loop can be formed. The feed is advantageously with power source characteristics formable.

Of the Benefits of this technique consists mainly in that for extended Equipment sub-segments can be manufactured, which is already in the factory their function are checked can. Furthermore, the installation is simplified at the end customer because the system parts (e.g., roller conveyor segments) are no longer electrically installed or need to be connected but only magnetic coupling elements are inserted have to, or even these are already preassembled in the system parts.

at In an advantageous embodiment, the system comprises composable Plant parts, each associated with at least one section is. Thus, the system part including its electrical components prefabricated as a module and already in the production of the module alone testable. Of the Plant part is then assembled in the system with other parts of the system and these are then only to couple magnetically. Thus, the plant economical can be produced and the modules can be exchanged quickly and easily. The plant part may be an assembly conveyor section his or a roller conveyor. But there are also other parts providable. Only the electrical mechanical interface is always the same.

In an advantageous embodiment, primary conductors of the assembled system parts are provided overlapping, wherein a coupling element is providable to amplify the magnetic Coupling between each overlapping primary conductor. In particular, the coupling element is made of magnetically conductive material, such as ferrite. Advantageously, therefore, a U-core or a U-core can be used, preferably with a yoke. Thus, the coupling of the primary conductor is very strong executable.

at According to an advantageous embodiment, a primary conductor is at the consumer provided that an inductive coupling with a consumer included secondary winding is predictable. The advantage here is that no connector necessary is and thus the wiring is fast and easy executable. Furthermore Costs are saving. Because no cable assembly necessary The installation can also be done by non-electrotechnically trained Personnel performed become.

at an advantageous embodiment is at least one primary conductor provided in a recess or a cable channel of the consumer. The advantage here is that the cable laying very fast and easy to execute is, namely by mere pushing into the depression or the cable channel. In addition, a casting with a potting compound advantageously executable.

at An advantageous embodiment is at least one secondary winding around a U-shaped and / or E-shaped Core wound or integrated into a very flat receiver head. Advantageous is that, depending on the method used, desired Performance and desired Efficiency the execution is selectable.

at In an advantageous embodiment, the primary conductors are at least partially potted and / or protected by a lid. It is advantageous that a particularly high degree of protection can be achieved and no polluting cavities arise. Such in the lid or holder potted conductor pieces can a smooth housing surface of the Consumer be mounted so that no recess or no Channel must be provided at the consumer.

at an advantageous embodiment, the consumer is tight, on the outer surface smooth and / or designed in high degree of protection. The advantage here is that the consumer in particular to use in wet areas and / or aseptic areas is providable.

at an advantageous embodiment, the consumer does not include Connectors or other electrical connection devices his appearance. From The advantage here is again that the consumer in a simple way tight and high degree of protection is executable.

Further Advantages emerge from the subclaims.

1

casing

2

rotor shaft

3

housing part

4

primary conductor

5

primary conductor

6

deepening

7

core with U-shaped cross-section

21

primary conductor

22

primary conductor

23

clamp

24

deepening

25

deepening

26

housing part

27

core with U-shaped cross-section

28

second Core with U-shaped cross-section

31

cover

32

primary conductor

33

primary conductor

34

Cabel Canal

35

core with E-shaped profile

36

core with E-shaped profile

37

housing part

40

drilled and tapped holes

41

E-shaped cores

50

Area for flat transformer head

100

feed

101

medium for inductive coupling

102

first Section of the primary conductor system

103

second Section of the primary conductor system

104

Consumer, for example, drive

105

first plant part

106

second plant part

107

Consumer, for example, drive

108

medium for inductive coupling

The Invention will now be explained in more detail with reference to figures:

In the 1a . 1b and 1c is a drive as inventive consumer in isometric view, shown in sectional view and plan view. The drive comprises an electric motor with rotor shaft 2 that of a housing 1 is surrounded. The electronic circuit for supplying and controlling the electric motor is essentially of. housing part 3 protected, that is a depression 6 in which a primary conductor is inserted with a winding loop. The return line, so the second primary conductor is only carried out, so not wrapped around the drive.

The housing part 3 includes a core 7 with a U-shaped cross section, in which a secondary winding is placed, which supplies the electronic circuit. Thus, the consumer can be supplied without contact by means of the inductive coupling and thus galvanically isolated from the primary circuit. Disconnecting the supply to the load is made possible by unwinding or deriving the loop of the primary conductor quickly and easily.

The Supply of the primary circuit is done by a device that generates the medium-frequency primary current and even supplied with mains voltage. In particular, this has Device a current source behavior with respect to the generated by it primary current on.

In further embodiments of the invention Information is generated by modulating higher frequency signals transmit the primary conductor, by the electronic circuit means for demodulating the signals includes. For the exchange of information includes the electronic Circuit also means for modulating, which then also signals on the primary conductor can be modulated.

On This way, therefore, the drive is contactless as a consumer supplied. The invention has the consequence that a novel installation technique, So a novel supply principle, in industrial plants and / or machines can be realized. Because at the installation the consumer must have this no longer electrically connected to costly connectors and be wired but it is sufficient to wrap a primary conductor in the recess of the drive. Because the supply is serial Also, no distribution box or tee is needed. A shutdown of the consumer is by simply and quickly executable Lifting or removing the primary conductor from the consumer allows.

Besides that is a high degree of protection can be realized because connectors are omitted and thus the consumer, in particular drive, with its housing in cheaper Way is tight. Thus, the drive is particular with a smooth housing Can be produced and thus used in the aseptic area or wet area.

medium for potential separation and other separation devices are savings, because the housing wall thickness is dimensioned accordingly and the inductive coupling easily is separable.

The Of course, electronic circuit also includes the secondary side Funds for the inductive, so non-contact Energy transfer. at advantageous embodiment these means are advantageously passive components, ie capacitors and windings around bobbins. In the simplest version is the transmitter head with a winding as a secondary winding wrapped and a capacitor connected downstream, whose capacity with the Inductance of Winding is in resonance, with the resonant frequency of the frequency of the alternating current in the primary conductor is equal to or does not deviate more than 10%.

The Drives can be serially supplied with the primary conductor. The decoupling individual motors is possible without interrupting the power supply of the others got to. It is only necessary that the primary conductor conductor loop solved by the drive is, for example, by lifting the conductor loop from the depression.

at the wiring according to the invention omitted Tees.

The drive is in the 1a . 1b and 1c drawn as a rotor drive. In other embodiments of the invention, the drive is designed as a linear drive and supplied inductively.

In other embodiments of the invention is instead of the drive another electrical consumer according to the invention with means equipped for inductive supply.

In further embodiments of the invention according to 2a . 2 B . 2c are located on the B-side cores 27 . 28 with a U-shaped cross-section at recesses for the primary conductors 21 and 22 , A clamp 23 serves to fix the primary conductors in their recesses. For the function is only a core 27 necessary. The further core 28 increases the efficiency of the entire device. The secondary windings on the two cores 27 . 28 are connected together and supply the electronic circuit, in turn, in the area of the housing cover 26 is arranged, the B-side of the housing 1 is provided.

In further embodiments of the invention according to 3a . 3b . 3c . 3d . 3e . 3f . 3g . 3h showing different views, partly with suppression of material components as in 3b shown, is the first primary conductor 32 in a cable duct 34 guided, which is provided in a half-loop upwards. The second primary conductor 33 is guided downwards in a corresponding half-loop. For inductive coupling are an E-shaped core 36 in the upper half loop and a second E-shaped core 35 provided in the lower half-loop, in particular in the material of the lid. The E-shaped cores are with their thighs of the E on the housing part 37 introduced. The housing part 37 protects a circuit board, which carries designed as tracks running helical windings, which are provided as secondary windings. In particular, a flat E-shaped core is placed on this board and oriented such that its leg in extension, the legs of the E-shaped core 36 to meet. Thus, a very good inductive coupling can be achieved, as in 3i indicated. The board can also be equipped with other electronic components.

The in 3a shown lid 31 is intended for mechanical protection function and as a clamping device, ie strain relief. In the 3b is material of the lid 31 omitted, leaving the E-shaped cores 35 . 36 visible and also the cable channels 34 , The lid is with the case 1 releasably screwed.

In 3l it is even clearer to see how the primary conductors 32 . 33 are pressed into the running as wells cable channels.

In further embodiments of the invention this cover comprises magnetically conductive material for improved Energy coupling. In particular, this material is also advantageous U- or E-shaped shaped.

In further embodiments of the invention, the primary conductors 32 . 33 provided in the cable ducts with potting compound for fixing and sealing.

In further embodiments of the invention are according to 3i in the case 1 two E-shaped cores 41 inserted, is placed around the center leg around a secondary winding. The attachment of the lid 31 done in tapped holes 40 , In 3y is the area 50 shown for a flat receiver head. Its secondary winding is designed as a board layout, ie very flat on a board. The board is in the shape of the area 50 executed. The board is equipped with an E-shaped core, wherein the secondary winding is wound around the center leg of the E and the other two legs are arranged in the outer area around the secondary winding around. The legs are designed very short, especially in comparison to the total length of the E. The transformer head is so after the in the DE 103 12 284.2 disclosed teaching executed.

The Consumers can be supplied serially with the primary conductor. The decoupling individual consumer is enabled without interrupting the power supply of the others got to. It is only necessary that the primary conductor conductor loop solved by the drive is, for example, by lifting the conductor loop from the depression.

at the wiring according to the invention omitted Tees.

The method for non-contact energy transfer and the associated components are advantageously executable in advantageous embodiments according to the in the writings DE 100 53 373 . DE 103 12 284 . DE 103 12 792 . DE 103 39 340 . DE 103 38 852 . DE 103 49 242 . DE 103 44 144 . DE 4446 779 or also WO 92/17929 disclosed features. It is particularly advantageous to use a center frequency of about 15 to 30 kHz. The following on the transformer head, comprising the coil core, matching circuit is particularly advantageous passively executable, ie without electronic power semiconductors.

In 5 is a plant befitting overall. This consists of the feed 100 supplied primary conductor system of two sections 102 and 103 , The first 102 this is with a means 108 coupled and supplied for inductive coupling with the feed. This is as a means 108 For example, a transformer providable, which has a strong magnetic and inductive coupling, because he has to provide only a small air gap.

Likewise, the further section of the route 103 with a means 101 inductively strong to the stretch of road 102 coupled. In this case, the conductor loops of the primary conductor of the sections can be designed to overlap and the means 101 such that it can be inserted from above into the overlapping area and / or adjacent areas. The means may thus be an E-core, which is lockable with a yoke. Or alternatively, the conductor loop portions of the primary conductors are guided tangentially past each other with such a distance that in turn a means 101 is inserted from above, which improves the magnetic coupling.

The consumer 104 For example, a drive is with a weaker coupling to the Primärleiterstreckenabschnitt 102 coupled. The same applies to the consumer 107 and the section of the route 103 ,

The consumers ( 104 . 107 ) are of their parts ( 105 . 106 ).

By the one-to-one allocation of the plant parts to the track sections, it is possible that now plant parts 105 and 106 are each prefabricated and can be checked in the factory on function. So there are partial segments of the system vorfertigbar and testable. This is especially true for the electrical installation and the connection reduces the effort in the preparation of Anla ge.

advantage The invention is that the serial coupling of the sections is executable with means for strong coupling. Thus, the energy losses low.

advantage is furthermore that the wiring is not potential-related. Therefore, the system parts or their electrical component are vorfertigbar.

When Plant parts are exemplary conveyor belts and / or roller conveyors advantageous be provided. Also turntables with several inductively coupled consumers are predictable.

Claims (29)

System, characterized in that consumers are supplied without contact by means of respective inductive coupling to one or more primary conductors of a respective link section of a primary conductor system, wherein the link sections are coupled to each other via means for inductive coupling. Plant according to at least one of the preceding Claims, characterized in that the plant comprises composable plant parts, each of which at least one route section is assigned. Plant according to at least one of the preceding Claims, characterized in that primary conductors of the composite Plant parts overlapping are provided, wherein a coupling element is providable to reinforce the magnetic coupling between each overlapping primary conductor. Plant according to at least one of the preceding Claims, characterized in that the coupling element of magnetically conductive material, as made of ferrite, for example. Plant according to at least one of the preceding Claims, characterized in that the plant parts can be assembled serially are and at their front and rear end area respectively for the overlap intended primary conductor areas exhibit. Plant according to at least one of the preceding Claims, characterized in that the means for inductive coupling for one more Coupling are provided as the means for inductive coupling the consumer to the respective primary conductor. Plant according to at least one of the preceding Claims, characterized in that the consumer is designed in such a way that the primary conductor Removable from the consumer. Plant according to at least one of the preceding Claims, characterized in that the primary conductor of an AC / AC converter, ie from an infeed that has an AC to AC converter includes, is supplied, in particular by means of inductive coupling. Plant according to at least one of the preceding Claims, characterized in that the AC / AC converter from the electrical Mains, in particular with 50 or 60 Hz, is supplied. Plant according to at least one of the preceding Claims, characterized in that at least one primary conductor non-positively or positively in the Consumer is held. Plant according to at least one of the preceding Claims, characterized in that at least one primary conductor shed in the consumer is. Plant according to at least one of the preceding Claims, characterized in that consumers on a movable part, in particular turntable or linear drive, are arranged. Plant according to at least one of the preceding Claims, characterized in that the part is rotatably mounted or linear is movable. Plant according to at least one of the preceding Claims, characterized in that the primary conductor with medium frequency AC is applied. Plant according to at least one of the preceding Claims, characterized in that the primary conductor with medium frequency Alternating current of about 10 to 50 kHz, in particular of about 20 kHz, is charged. Plant according to at least one of the preceding Claims, characterized in that the primary conductor the consumers serially provided. Plant according to at least one of the preceding Claims, characterized in that the primary conductor via stationary, at least one coil winding comprehensive coil cores contactless or over Conductor line is supplied with energy. Plant according to at least one of the preceding gone claims, characterized in that the primary conductor is laid as a closed loop. Plant according to at least one of the preceding Claims, characterized in that primary conductor and load galvanic are decoupled. Consumer, characterized in that he Means for its inductive supply from a primary conductor system includes, the primary conductor system comprises at least two sections, which have means for inductive coupling coupled together. Consumers after at least one of the preceding Claims, characterized in that the means is an electronic circuit to supply parts of the consumer. Consumers after at least one of the preceding Claims, characterized in that the consumer is a drive, the at least one electric motor and an electronic circuit for Supply of the electric motor includes. Consumers after at least one of the preceding Claims, characterized in that a primary conductor in such a way at the consumer provided is that an inductive coupling with one from the consumer included secondary winding is predictable. Consumers after at least one of the preceding Claims, characterized in that at least one primary conductor in a recess or a cable channel of the consumer is provided. Consumers after at least one of the preceding Claims, characterized in that at least one secondary winding around a U-shaped and / or E-shaped Core or wrapped in a flat core. Consumers after at least one of the preceding Claims, characterized in that the primary conductors at least partially potted and / or held by a lid. Consumers after at least one of the preceding Claims, characterized in that the consumer is tight, smooth on the outer surface and / or is designed in a high degree of protection, in particular for use in wet areas and / or aseptic areas. Consumers after at least one of the preceding Claims, characterized in that the consumer is not a connector or other electrical connection devices on its exterior. Consumers after at least one of the preceding Claims, characterized in that the consumer is designed in such a way that information by modulating higher frequency signals on the primary conductor transferable is.