DE102007007562A1 - Connection module for a linear electric motor - Google Patents

Abstract

The invention relates to a connection module (1) for an electrical machine, wherein the connection module (1) has at least one contact element (2, 3) which is provided for the connection of a single- or multi-phase motor winding and at least one supply cable (11) for power transmission , is formed and by means of a suitably aumrüstbar.

Description

The The invention relates to a connection module for an electrical Machine, wherein the connection module at least one contact element that is for connecting a single- or multi-phase Motor winding and at least one supply cable for power transmission is provided. Furthermore, the invention relates to a primary part for a linear electric motor and an electric Linear motor.

linear motors have a primary part and a secondary part. The primary part contrasts in particular with the secondary part. The secondary part has, for example, permanent magnets or energized windings. The primary part is to be energized with provided electric current and has a juxtaposition of Motor windings on, from outside over one or several supply cables are supplied with electrical energy.

It is common practice, the primary parts of linear motors with insulating, hardening potting compound to shed, Creepage currents and relative movements of the motor windings to prevent each other. However, this brings the disadvantage with it, that after curing of the potting compound the Connections of the supply cable are shed with and so are no longer accessible. In case of damage the feeder cable, which in particular can easily occur, if the primary part is used as a moving part is thus the entire primary part unusable.

This problem can be avoided by attaching a connection module. The connection module is inserted from the outside into the housing of the primary part and is then arranged predominantly within the housing of the primary part. Before the connection module is inserted into the housing, the motor winding of the primary part is fastened on the motor side on the connection module be. The supply cable or cables for the supply of electrical energy are attached from the outside to the connection module and are connected via corresponding contact elements, such as connecting bolts, with the lines of the motor winding. From the not yet published patent application DE 10 2006 030 611.2 is such a connection module known. The disadvantage here is that the contact elements are usually designed as screw contacts. The or the supply cable should be screwed accordingly from the outside, which increases the time required, for example, when starting up the electrical machine or when replacing the power cable accordingly.

task The present invention is a connection module for to provide a primary part of a linear motor, which ensures a fast and safe connection of the supply cable.

These The object is achieved by the features of claims 1, 9 and 10 solved. Advantageous developments are the Subclaims refer.

According to the invention the connection module at least one contact element for the Connection of a single- or multi-phase motor winding and at least a power cable for power transmission. The Contact element is designed as a screw contact and is by means of a correspondingly shaped sleeve to a plug contact convertible.

By this surprisingly easy to implement solution a screwed contact can be converted very quickly to a plug contact become. Since the or the contact elements usually as screw contacts are formed and the sleeves only to the screw it is not necessary to construct the connection module structurally to change.

One Another advantage of the invention is that the possibility exists between a screw contact and a plug contact choose. The sleeve can be removed at any time or be replaced. Thus, according to the connection of the supply cable a screw contact or a plug contact can be selected.

Further It is conceivable that the screw directly, d. H. without additional Component, such as a sleeve, as a plug contact is being used. In this case, the power cable would For example, have a socket with a contact spring, wherein the socket is plugged directly onto the screw contact and the socket is designed with contact spring such that an electrical contact will be produced.

A alternative embodiment of the invention is the contact element, or even more contact elements, directly as Plug contact, for example, as a plug pin form. A conversion from a screw to a plug contact would be at this embodiment is no longer necessary because the connection module already provided with trained as a connector pins contact elements is or is made.

The supply cable has a corresponding connection to the screw contact or the plug contact. In the case of a screw connection with an external thread, the supply cable has, for example, a connection with an internal thread (or vice versa) or cable lugs with nuts or screws. For a plug contact, the Zuleitungska For example, bel a connection with a socket with a contact spring.

The Feed cable is advantageously designed so that there are several Has connections. A connection is used for the connection of a contact element of the connection module. The or the connections also act as contacts and are For example, as sockets, terminals, cable lugs with nuts or Screws, etc. formed.

Farther has the supply cable insulation material for electrical insulation the live parts, which on the one hand for isolation the electrical contacts with each other (short circuit and unwanted Fault currents), as well as for isolation Touch serves. The supply cable, in particular the actual cable connection area, d. H. the area which the Has terminals or contacts is in a housing arranged, wherein the housing, for example, made of metal is manufactured and has a corresponding EMC protection. Of Furthermore, it is possible to use the supply cable with form a shielded cable connection area, whereby a Shielding electrical and / or magnetic fields ensured can be. Such a shield can, for example by means of a cable gland done with the supply cable fixed and tightly connected to the housing and in addition the supply cable against mechanical influences, dust and protects moisture.

One Connection via plug-in contacts, instead of via screw contacts, is a user-friendly connection option for supply cables, such as power cables, sensor cables or data bus connections, because the supply cable just plugged in, and no longer screwed Need to become.

To arranging the sleeve is the screw as plug pin or contact pin trained and ready. A connector pin is a conductive metal pin that fits in plugs or other electrical and electronic components, for example, an electrical contact produces with a contact spring in a socket.

Preferably There are several contact elements on the connection module, where the contact elements designed as screw contacts as connection bolts, Threaded bolt, threaded rod or sleeve with internal thread trained and integrated into the connection module or positive locking are arranged on the connection module.

The Sleeves are designed so that they either have an internal thread or have an external thread. Thus, a sleeve, depending on whether the screw contact has an internal or external thread, either screwed on the screw or in the screw screwed. The sleeves are also electrically conductive designed so that the electrical contact between the motor winding and the power cable is given. The pods are corresponding formed the existing screw.

The Connection module is a compact component, which in the field of to be connected motor winding in the housing interior introduced the primary part, for example, inserted or inserted, is. The connection module can also be pressed in be. The connection module can additionally with the housing the primary part is glued or is by an additional Potting the entire primary part with potted. It is just as possible that the connection module with the housing screwed to the primary part or to the housing clamped or clipped. The housing of the primary part can be formed in one or more parts.

Before the connection module in the insertion opening, which also as Insertion shaft can be formed, the housing of the Primary part is introduced, the contact elements of the connection module connected to the motor winding. Thus, done the connection of the motor winding to the contact elements outside of the primary part, which facilitates the assembly considerably. These are the end areas of the motor winding or motor windings designed in length so that a connection outside of the primary part is possible. The end areas of the motor windings are electrically insulated against each other, allowing insertion the connection module and the extended ends of the motor windings can easily be done in the housing of the primary part. Subsequently, the connection module, on which now the single-phase or multi-phase motor winding is connected in the primary part brought in. Afterwards the supply cables are from the outside connected to the connection module of the Pri märteils. This has the advantage that in case of damage to the supply cable this can be easily exchanged and the primary part can be used.

The Connection module is predominantly inside the housing arranged the primary part. The connection of the supply cable via a front side of the connection module, which is from outside is accessible and thus not located in the housing of the primary part.

The connection module is first separately, ie independent of the actual primary part, manufactured and assembled according to appropriate function and quality testing with the primary part. This has the advantage that the production of the connection module can be independent of the production of the primary part.

One Contact element is for connecting a motor winding to a respective supply cable, in particular a power cable, intended. For example, if the primary has more than one Phases (eg, three phases u, v, w of a three-phase network) and several Windings on (eg three windings per phase), so can Windings of a phase be connected in parallel or in series. It Now, the three windings of one phase can be connected to a common one Be connected power cable. A power cable can as well intended for common connection of different phases be by the power cable itself has several different phases.

Several Contact elements of the connection module can also be interconnected connected by means of one or more bridge circuits be by means of which the desired circuitry, such as star or delta connection, realized. Three contact elements can by means of Brückschaltungen be connected in parallel, so that when connecting the power cable the desired circuit already exists.

Preferably are the contact elements, in particular the connecting pins, against rotation arranged on the connection module. This will be a safe and simplified Mounting the motor windings and the supply lines allows.

advantageously, the connection module is designed as a plastic injection molded part. As a plastic, for example, a temperature-resistant plastic intended. As plastic material, all available plastics are used which are the appropriate Requirements for electrical insulation, mechanical strength, thermal and chemical resistance are sufficient.

In the injection molding connection module, the contact elements are safe held and are due to the electrical properties of plastic against each other isolated. Furthermore, injection molded parts are simple and inexpensive produced. The contact elements are either in production of the connection module inserted in the corresponding mold and overmoulded or after the production of the injection-molded part in this inserted.

With Particularly advantageous, the connection module further contact elements for connecting sensors, in particular temperature sensors. The temperature sensors are used, for example, for monitoring the engine temperature. It is also possible on the connection module contact elements for the connection of Provide data bus lines.

The Connection module is preferably arranged on a primary part, wherein the primary part is a housing with an insertion opening has for receiving a connection module. The connection module but can also be arranged on a secondary part.

The Primary part with the connection module is for one provided electrical machine, preferably as a linear elec- tric Machine is formed. The electric machine can also be called be formed rotary machine.

In The following description describes further features and details of the invention in conjunction with the accompanying drawings of exemplary embodiments explained in more detail. there are features and relationships described in individual variants basically transferable to all embodiments. In the drawings show:

1 a first embodiment of a connection module;

2 a second embodiment of a connection module;

3 an inventive connection module and a corresponding primary part and supply line.

1 shows a first embodiment of a connection module 1 in a front view. The connection module 1 has the contact elements 2 and 3 on. Each contact element 2 and 3 is an identifier 4 (u, v, w, mass symbol) or 5 (1TP1, 1TP2, + 1R1, + 1R2) which indicates how the contact elements 2 . 3 to switch. The three contact elements 2 are used to connect the motor winding and the ground cable. In the present case, these are the three phases u, v, w of a three-phase alternating current network or three-phase network.

There may be other contact elements 2 be present, for example, if the primary part has multiple motor windings per phase. If, for example, the primary part has three motor windings per phase u, v, w, then nine contact elements can be used 2 to be available.

The contact elements 3 are intended for sensor cables, for example for temperature sensors. Other contact elements, for example, for data bus lines are not shown.

The contact elements 2 are as screw contacts with external thread and the contact elements 3 designed as screw with In nengewinde.

The connection module 1 is designed as a plastic injection molded part. Therefore, the identifiers 4 and 5 be formed in a simple manner by structuring the injection molding compound or by appropriate design of the casting mold.

Furthermore, the connection module 1 a stop 6 on, located on the front of the connection module 1 located. The stop 6 , which is designed as a circumferential protruding frame or edge, has a larger circumference than the rest of the connection module 1 on. Will the connection module 1 introduced into a housing, not shown, a primary part, that is inserted, so the connection module 1 until reaching the stop 6 be inserted into the housing of the primary part. The stop 6 then lies flat or positive on the housing, not shown, of the primary part from the outside.

2 shows a second embodiment of the connection module 1 , wherein the second embodiment substantially according to the first embodiment 1 equivalent. In 2 you can see that the contact elements 2 and 3 , which are initially formed as screw contacts, now the sleeves 7a and 7b exhibit.

The contact elements 2 are designed as screw contacts with external thread, so that the sleeves 7a have an internal thread and on the contact elements 2 be screwed on.

The contact elements 3 are screw contacts with internal thread, so that the sleeves 7b have an external thread. The pods 7b are rod-shaped, with about only one half of the rod-shaped sleeve 7b has an external thread. That half of the sleeve 7b , which has a thread, is in the screw 3 screwed in, with half of the sleeve 7b with thread substantially the depth of the screw 3 equivalent. The other half of the sleeve 7b is formed without thread and represents the plug contact or the plug pin.

3 shows the connection module 1 from 1 respectively. 2 and a corresponding primary part 8th , The connection module 1 is a compact component, which in the area of the motor winding to be connected in an insertion opening 9 of the housing 10 introduced, for example, inserted or plugged or pressed, is. The housing 10 is designed in several parts. Before the connection module 1 in the slot 9 of the primary part 1 is introduced, the motor winding, not shown, is connected. The connection module 1 can additionally with the housing 10 of the primary part 8th be glued or is replaced by an additional external encapsulation of the entire primary part 8th then shed with.

In the case 10 of the primary part 8th Among other things, the motor winding (not shown) was added. In this respect corresponds to the linear motor or the primary part 8th a conventional linear motor whose structure is well known and will not be explained in detail here.

Furthermore, the sleeves are 7a and 7b shown a simple retooling of screw contacts 2 enable to plug contacts. Subsequently, one or more supply cables 11 from the outside on the connection module 1 connected, which serve for the supply of electrical energy for the motor winding, not shown. The power cables for connection to the contact elements 2 and the sensor lines for the contact elements 3 can work together in the power cable 11 be arranged. The power cables and the sensor cables can also be used as separate power cables 11 be educated.

The supply cable 11 is designed to have multiple ports (not visible). A connection serves for the connection of a contact element 2 . 3 of the connection module 1 , The or the terminals also act as contacts and are designed for example as sockets, terminals, cable lugs with nuts or screws, etc.

Furthermore, the supply cable 11 Insulating material for the electrical insulation of the live parts. The supply cable 11 , In particular, the actual cable connection area, ie the area which has the terminals or contacts, is in a housing 12 arranged, the housing 12 For example, is made of metal and has a corresponding EMC protection. Furthermore, there is the possibility of the supply cable 11 form with a shielded cable connection area, whereby a shielding of electrical and / or magnetic fields can be ensured. Such a shield can for example by means of a cable gland 13 take place, with the supply cable 11 tight and tight with the housing 10 of the primary part 8th is connected and in addition the supply cable 11 protects against mechanical influences, dust and moisture.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 102006030611 [0004]

Claims (10)

Connection module ( 1 ) for an electrical machine, wherein the connection module ( 1 ) at least one contact element ( 2 . 3 ), which is suitable for connecting a single-phase or multi-phase motor winding and at least one supply cable ( 11 ) is provided for power transmission, characterized in that the contact element ( 2 . 3 ) is designed as a screw contact and by means of a correspondingly shaped sleeve ( 7a . 7b ) Can be converted to a plug contact. Connection module ( 1 ) according to claim 1, characterized in that the plug contact is designed as a plug pin or pin. Connection module ( 1 ) according to claim 1 or 2, characterized in that the screw is designed as a connecting bolt, threaded bolt, threaded rod or sleeve with internal thread. Connection module ( 1 ) according to one of claims 1 to 3, characterized in that the sleeve ( 7a . 7b ) at least partially has a thread and can be screwed onto the screw or screwed into the screw. Connection module ( 1 ) according to one of claims 1 to 4, characterized in that the connection module has a plurality of contact elements ( 2 . 3 ), wherein the contact elements ( 2 . 3 ) into the connection module ( 1 ) integrated and / or positively on the connection module ( 1 ) arranged ind. Connection module ( 1 ) according to one of claims 1 to 5, characterized in that the contact elements ( 2 . 3 ) are arranged against rotation. Connection module ( 1 ) according to one of claims 1 to 6, characterized in that the connection module ( 1 ) on a primary part ( 8th ) is arranged for a linear electric motor, wherein the primary part is a housing ( 10 ), which the primary part ( 8th ), and wherein the housing ( 10 ) an insertion opening ( 9 ) for receiving the connection module ( 1 ) having. Connection module ( 1 ) according to one of claims 1 to 7, characterized in that the connection module ( 1 ) is designed as a plastic injection molded part. Primary part ( 8th ) with a connection module ( 1 ) according to one or more of claims 1 to 8. Linear motor with at least one primary part ( 8th ) according to claim 9.