CN110828239B - Wiring module used in combination with contactor and contactor assembly - Google Patents

Abstract

Embodiments of the present disclosure provide a wiring module for use with a contactor and a contactor assembly including the same. This wiring module includes: at least one set of first conductive members, each set comprising a fixed portion and a movable portion adapted to be disposed in a closed position electrically coupled to the fixed portion or an open position electrically decoupled from the fixed portion; and a switching member extending along a longitudinal axis and adapted to have the movable portion disposed thereon, the switching member being reciprocally movable along the axis by being driven by the movable contact of the contactor so that the movable portion is switched between the closed position and the open position, and at least one of the movable portion and the movable contact is located in the open position. The embodiment of the disclosure provides a reliable and low-cost star-sealing wiring module which is suitable for being matched with a contactor to be applied to various control circuit systems.

Description

Wiring module used in combination with contactor and contactor assembly

Technical Field

Embodiments of the present disclosure relate generally to the field of electrical devices and, more particularly, to a wiring module for use with a contactor and a contactor assembly.

Background

At present, a Permanent Magnet Synchronous Motor (PMSM) is widely used in an automatic control system of various kinds of electric equipment. However, after the permanent magnet synchronous motor is stopped, the motor rotor of the permanent magnet synchronous motor continues to rotate for a period of time due to the inertia. In this case, the permanent magnet synchronous motor becomes a power generation device, which creates a safety hazard. To overcome the above problems, a common solution at present is to short-circuit the permanent magnet synchronous motor after shutdown. Thus, the motor rotor is subjected to resistance action when continuing to rotate due to the action of inertia, so that the rotation is stopped.

One scheme for achieving the short circuit of the permanent magnet synchronous motor is to adopt two mechanically interlocked contactors, wherein one contactor is used for controlling the operation of the motor, and the other contactor is used for achieving the short circuit of the permanent magnet synchronous motor after the motor is shut down through star connection. The star sealing means that the outgoing lines of the three-phase winding of the motor are connected in a star mode by using a lead or a series resistor. The other scheme is that a special star sealing contactor is adopted to realize the star sealing function, so that the permanent magnet synchronous motor is in short circuit after the machine is stopped.

Disclosure of Invention

With the first solution described above, in case of a power failure, both mechanically interlocked contactors will be in the open state at the same time. At the moment, the permanent magnet synchronous motor cannot be effectively short-circuited through the contactor, and certain danger can be caused under the emergency condition. For the second solution, the special star-sealing contactor has a single kind, a complex structure and a large volume, and the application of the special star-sealing contactor is limited to a certain extent.

Embodiments of the present disclosure provide a wiring block for use with a contactor and a contactor assembly including the same to address, or at least partially address, the above-mentioned problems or other potential problems with permanent magnet synchronous motor control.

In a first aspect of the present disclosure, a wiring module for use in conjunction with a contactor is provided. This wiring module includes: at least one set of first conductive members, each set comprising a fixed portion and a movable portion adapted to be disposed in a closed position electrically coupled to the fixed portion or an open position electrically decoupled from the fixed portion; and a switching member extending along a longitudinal axis and adapted to have the movable portion disposed thereon, the switching member being reciprocally movable along the axis by being driven by the movable contact of the contactor so that the movable portion is switched between the closed position and the open position, and at least one of the movable portion and the movable contact is located in the open position.

According to the embodiment of the disclosure, the wiring module is small in volume and simple in structure, is suitable for being matched with various types of existing contactors, and has the advantage of wide application range. Meanwhile, the movable part of the wiring module is positioned at the closed position after the contactor is disconnected by linking the switching component with the movable contact of the contactor. Therefore, the permanent magnet synchronous motor is effectively short-circuited, and the reliability of a control system is improved.

In some embodiments, the switching member comprises an arm arranged at a position further away from the contactor than the movable part, such that in a movement of the switching member towards the contactor, the arm is able to push the movable part such that the movable part is electrically decoupled from the fixed part. In such an embodiment, it is ensured that the terminal module is in the open state in the state in which the contactor is closed. Thereby, the motor can be normally operated.

In some embodiments, the arm is spaced apart from the movable portion by a first distance and the movable contact and the stationary contact of the contactor are spaced apart by a second distance in a state where the movable portion is in the closed position, wherein the first distance is less than the second distance. In such an embodiment, it is ensured that the moving and stationary contacts of the contactor are not yet in contact when the movable part of the wiring module is electrically decoupled from the fixed part. Thus, faults caused by the fact that the wiring module and the contactor are simultaneously in a closed state are avoided.

In some embodiments, the switching member further includes a first connecting portion disposed at an end thereof, and the first connecting portion is adapted to be connected with the movable contact to enable the movable contact to drive the switching member. In such an embodiment, the switching member is connected to the movable contact through the first connecting portion at the end, so that the linkage between the junction module and the contactor is realized.

In some embodiments, the wiring module further includes a housing and a first resilient element. The housing includes a body. The first elastic element is disposed between the bottom of the body and the movable portion and is adapted to maintain the movable portion in the closed position. In such an embodiment, the movable portion can be reliably held in the closed position by the elastic force action of the first elastic member. Thus, the wiring module can be stably closed when the contactor is in the open state. Therefore, the permanent magnet synchronous motor is effectively short-circuited, and the reliability of a control system is improved.

In some embodiments, the housing further includes a cover plate disposed on the body, and the wiring module further includes a second elastic member. The second elastic element is disposed between the cover plate and the switching member and is adapted to press the switching member in a direction away from the cover plate. In such an embodiment, when the switching member is driven by the movable contact of the contactor to move towards the direction of the contactor, the second elastic element can push the switching member towards the same direction. Therefore, the second elastic element provides auxiliary force for the movement of the switching component, so that the influence on the closing of the moving contact of the contactor due to the driving of the switching component is reduced, and the normal work of the contactor is ensured.

In a second aspect of the present disclosure, a contactor assembly is provided. The contactor assembly comprises a contactor and the wiring module.

The second aspect of the present disclosure is based on the same inventive concept as the first invention, and aims to achieve effective short circuit of the permanent magnet synchronous motor, improve the reliability of the control system, reduce the cost, and expand the application range.

In a third aspect of the present disclosure, a method for manufacturing the above-described wiring module is provided. The method comprises the following steps: providing at least one set of first conductive members, each set comprising a fixed portion and a movable portion; disposing the movable portion on the switching member; and arranging a switching member in the junction module in such a manner as to be capable of being driven by the movable contact of the contactor to reciprocate along the axis, so that the movable portion can be switched between the closed position and the open position.

In a fourth aspect of the present disclosure, a method for manufacturing the contactor assembly described above is provided. The method comprises the following steps: and connecting a moving contact of the contactor with a switching component of the wiring module.

Further features of the present disclosure will become apparent from the following description of exemplary embodiments with reference to the attached drawings. It should be understood that this summary is not intended to identify key or critical features of the embodiments of the disclosure, nor is it intended to be used to limit the scope of the disclosure. Other features of the present disclosure will become apparent from the following description.

Drawings

The above and other objects, features and advantages of the present disclosure will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout the exemplary embodiments of the present disclosure.

Fig. 1 shows a front cross-sectional view of a wiring module according to an embodiment of the present disclosure;

fig. 2 illustrates an exploded perspective view of a junction module according to an embodiment of the present disclosure;

figure 3 illustrates a front view of a contactor assembly according to an embodiment of the present disclosure;

figure 4 illustrates a front cross-sectional view of a contactor assembly according to an embodiment of the present disclosure;

FIG. 5 shows a perspective view of a cover plate according to an embodiment of the present disclosure; and

fig. 6 illustrates a perspective view of a junction module according to an embodiment of the present disclosure.

The same or similar reference numbers will be used throughout the drawings to refer to the same or like elements.

Detailed Description

The principles of the present disclosure will now be described with reference to various exemplary embodiments shown in the drawings. It should be understood that these examples are described merely to enable those skilled in the art to better understand and further implement the present disclosure, and are not intended to limit the scope of the present disclosure in any way. It should be noted that where feasible, similar or identical reference numerals may be used in the figures and that similar or identical reference numerals may indicate similar or identical functions. One skilled in the art will readily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.

As already briefly mentioned above, the inventors have noticed that the existing solutions for short-circuiting a permanent magnet synchronous machine after shutdown all present certain problems. On the one hand, if two mechanically interlocked contactors are used, an effective short circuit cannot be achieved since both contactors may be in a de-energized state and open simultaneously. Therefore, there is a problem that the reliability of the control effect is poor. On the other hand, if a special star sealing contactor is adopted, the application range of the star sealing contactor is limited due to the fact that the star sealing contactor is complex in structure, large in size and high in cost.

Embodiments of the present disclosure provide a wiring module for use with a contactor and a contactor assembly including the same. The wiring module ensures that the wiring module can be reliably in a closed state after the contactor is powered off and disconnected by linking the switching component with the moving contact of the contactor. Meanwhile, the wiring module is small in size and simple in structure, is suitable for being matched with various types of existing contactors, and has the advantage of wide application range. Some example embodiments will now be described with reference to fig. 1 to 6.

As shown in fig. 1 and 2, a wiring module 1 for use with a contactor 2 according to an embodiment of the present disclosure generally includes at least one set of first conductive members 10 and a switching member 20.

Each set of first conductive parts 10 comprises a fixed part 11 and a movable part 12, the movable part 12 being adapted to be set in a closed position electrically coupled with the fixed part 11 or in an open position electrically decoupled from the fixed part 11.

The switching member 20 extends along a longitudinal axis X and is adapted to have the movable portion 12 disposed thereon, the switching member 20 being reciprocally movable along the axis X by being driven by the movable contact 212 of the contactor 2, so that the movable portion 12 is switched between the closed position and the open position, and at least one of the movable portion 12 and the movable contact 212 is located in the open position.

With this arrangement, the junction module 1 is interlocked with the movable contact 212 of the contactor 2 through the switching member 20. During normal operation of the electric machine, the movable contacts 212 are closed and the first conductive part 10 of the terminal module 1 is open; when the motor is stopped, the movable contacts 212 are open and the first conductive part 10 of the terminal module 1 is closed. Therefore, after the motor is stopped, the wiring module 1 is connected through the star seal to cause the short circuit of the motor, so that the motor rotor stops rotating.

As an example, referring to fig. 1, 2 and 6, to achieve star-closing wiring of the wiring module 1, the wiring module 1 may be provided with three sets of first conductive parts 10, 10-2, 10-3. Also, the fixed portion 11 in each set comprises two portions 11 and 11' spaced apart from each other, one on each side of the movable portion 12. In the control circuitry, two parts 11 and 11' spaced apart from each other are connected in the circuit as input and output, respectively. The purpose of controlling the closing or opening of the wiring module 1 is thus achieved by controlling the electrical or electrolytic coupling of the movable part 12 with the two parts 11 and 11'.

It should be understood that the number of first conductive members 10 is related to the wiring pattern in the control circuit. Therefore, the number of first conductive members 10 of the wiring module 1 according to the present disclosure is not limited to the above-described three groups, but a corresponding number of first conductive members 10 may be provided according to a specific wiring manner.

Further, according to the embodiment of the present disclosure, the movable portion 12 is provided on the switching member 20, and can be moved reciprocally along the axis X by the switching member 20 to switch between the closed position and the open position. The movable portion 12 is also movable within a certain range with respect to the switching member 20. However, the movable range of the movable portion 12 relative to the switching member 20 is limited.

In some embodiments, for example, referring to fig. 1 and 2, the switching member 20 may include an arm 21. The arm 21 is arranged at a position further from the contactor 2 than the movable part 12, so that in the movement of the switching member 20 towards the contactor 2, the arm 21 can push the movable part 12 to electrically decouple the movable part 12 from the fixed part 11. By providing the arm 21, the switching member 20 is able to transmit the movement of the movable contact 212 of the contactor 2 to the movable portion 12. During the closing process of the movable contact 212 of the contactor 2, the arm 21 pushes the movable part 12 to be electrically decoupled from the fixed part 11, so that the linkage of the wiring module 1 and the contactor 2 is realized.

It should be understood that the arm 21 on the switching member 20 is merely an exemplary implementation that limits and moves the movable portion 12. Other forms of components may be contemplated by those skilled in the art in light of the teachings of the present disclosure. Such as a projection and a stopper provided on the switching member 20.

In order to avoid a malfunction due to the fact that the junction module 1 and the contactor 2 are simultaneously in the closed state, certain restrictions need to be placed on the size of the components in the junction module 1. In some embodiments, for example with reference to fig. 1 and 4, in the condition in which the movable part 12 is in the closed position, the arm 21 is spaced from the movable part 12 by a first distance D1 and the movable contact 212 and the stationary contact 211 of the contactor 2 are spaced by a second distance D2, wherein the first distance D1 is smaller than the second distance D2. According to such dimensional relationship, when the movable portion 12 of the wiring module 1 is electrically decoupled from the fixed portion 11, the movable contact 212 and the fixed contact 211 of the contactor 2 are not yet in contact, thereby avoiding that the wiring module 1 and the contactor 2 are in a closed state at the same time.

Further, referring to fig. 1, 2 and 4, in some embodiments, in order to achieve the mechanical connection of the switching component 20 with the movable contact 212 of the contactor 2, the switching component 20 may further include a first connection portion 22 disposed at an end thereof, the first connection portion 22 being adapted to be connected with the movable contact 212 to achieve the driving of the movable contact 212 on the switching component 20.

In some embodiments, for example, referring to fig. 1 and 2, the wiring module 1 may further include a housing 30 and a first resilient element 40. The housing 30 includes a body 31. The first elastic member 40 is disposed between the bottom 33 of the body 31 and the movable portion 12, and presses the movable portion 12 toward the fixed portion 11 by the elastic force thereof. Thus, when the contactor 2 is in the open state, the wiring module 1 can be stably in the closed state. Therefore, the permanent magnet synchronous motor is effectively short-circuited, and the reliability of a control system is improved.

Alternatively, the first elastic element 40 may be in the form of a spring 40, but may also be another element capable of providing an elastic force.

According to the embodiment of the present disclosure, the movable contact 212 of the contactor 2 needs to drive the switching component 20 to move, which may affect the normal actuation and/or release of the movable contact 212 of the contactor 2, thereby affecting the normal operation of the contactor 2.

To overcome this problem, in some embodiments, see, for example, fig. 2 and 5, the junction module 1 may further include a second resilient element 50 disposed between the cover plate 32 and the switching member 20. The second elastic element 50 is capable of pressing the switching member 20 in a direction away from the cover plate 32, i.e. towards the contactor 2, by pushing the top surface 23 of the switching member 20. Thus, when the switching member 20 is driven by the movable contact 212 of the contactor 2 to move toward the direction of the contactor 2, the second elastic element 50 can push the switching member 20 in the same direction. Therefore, the second elastic element 50 provides an auxiliary force for the above-mentioned movement of the switching member 20, thereby reducing the influence on the movable contact 212 of the contactor 2 due to the movement of the switching member 20, and ensuring the normal operation of the contactor 2.

Alternatively, the second elastic element 50 may be in the form of a spring 50, but may also be another element capable of providing an elastic force.

The above exemplary description illustrates the features and advantages of the junction module 1 according to the present disclosure. Further, referring to fig. 3 and 4, embodiments of the present disclosure also provide a contactor assembly 100. The contact assembly 100 generally includes a contact 2 and the wiring module 1 described above.

In various embodiments, the wiring module 1 may be connected to the contactor 2 in various suitable forms. Several example embodiments will be described below. It should be understood, however, that the following exemplary illustrations of the connection means in the embodiments do not constitute a limitation on the composition and structure of the wiring module 1, the contactor 2, and the contactor assembly 100. Other forms of connection are contemplated by those of ordinary skill in the art in view of the teachings of the present disclosure.

In order to realize the linkage of the switching member 20 with the movable contact 212 of the contactor 2, in some embodiments, for example, referring to fig. 1 and 4, the switching member 20 may be provided with a first connection portion 22. Correspondingly, the movable contact 212 of the contactor 2 is provided with a second connecting portion 220. And, the end of the second connection part 220 is provided with a groove 230. The first connection portion 22 can be received in the groove 230. This achieves the interlocking of the switching element 20 with the movable contact 212 of the contactor 2.

In addition, to secure the wiring module 1 and the contactor 2 together, in some embodiments, corresponding connection members may be provided on both the wiring module 1 and the contactor 2. A protrusion 240 is provided on a side of the contactor 2 facing the wiring module 1. Accordingly, a groove 60 adapted to receive the protrusion 240 is provided on the junction module 1. When the terminal module 1 and the contactor 2 are connected together, the protrusion 240 is fixed in the groove 60 and the locking arm 61 on the groove 60 is locked, so that the terminal module 1 and the contactor 2 can be reliably fixed.

The working process of the terminal module 1 according to the disclosure when used in combination with a contactor 2 is described below, taking as an example the application in the control circuitry of a permanent magnet synchronous machine.

In the control circuit system of a permanent magnet synchronous motor, the contactor 2 is used for controlling the starting and stopping of the motor, and the fixed part 11 of the first conductive part 10 of the wiring module 1 is connected to the stator winding of the motor, and the fixed part 11' is connected to the star-sealing part of the circuit.

In the unpowered state of the system, the movable part 12 of the junction module 1 is electrically coupled with the fixed part 11, constituting a normally closed contact. At the same time, the movable contact 212 and the stationary contact 211 of the contactor 2 are disconnected. The motor is in a stopped state.

When the system is powered on, the coil of the contactor 2 is energized, causing the movable contact 212 to start moving towards the stationary contact 211. At the same time, the movable contact 212 drives the switching member 20 of the junction module 1 to start moving through the second connecting portion 220. When the switching member 20 has moved a stroke, for example D1, the arm 21 on the switching member 20 comes into contact with the movable part 12 and starts to push the movable part 12 so that the movable part 12 is separated from the fixed part 11. At this time, the junction module 1 is in an open state. Since the distance D2 between the moving contact 212 and the stationary contact 211 of the contactor 2 is greater than D1, the moving contact 212 and the stationary contact 211 of the contactor 2 are not yet in contact, that is, the contactor 2 is not yet closed.

After the movable contact 212 continues to move for a certain stroke, the movable contact 212 and the fixed contact 211 are closed. Thus, the stator winding of the motor is energized and the motor starts to operate.

After the system is de-energized, the coil of the contactor 2 is de-energized, causing the movable contact 212 to begin to separate from the stationary contact 211. However, at this time, the movable portion 12 and the fixed portion 11 of the wiring module 1 are not yet in contact. After the movable contact 212 moves for a certain distance, the movable part 12 of the junction module 1 and the fixed part 11 are in contact again and electrically coupled. Thus, star-sealing wiring is realized in the control circuit system, and the stator winding of the motor is short-circuited.

It can be seen that in the mated use of the junction module 1 with the contactor 2, the junction module 1 is in a normally closed state when the system is not powered. Also, the open/close state of the junction module 1 is controlled by the movable contact 212 of the contactor 2. In operation of the system, at least one of the movable portion 12 of the junction module 1 and the movable contacts 212 of the contactor 2 is in the open position, i.e. cannot be simultaneously in the closed position.

In summary, the junction module 1 according to the present disclosure is linked with the movable contact 212 of the contactor 2 through the switching component 20. After the motor is stopped, the movable contacts 212 are opened and the first conductive part 10 of the terminal module 1 is closed. Therefore, after the motor is stopped, the short circuit of the motor caused by the wiring of the wiring module 1 through the star seal can be ensured, and the reliable motor stop control is provided. In addition, the wiring module 1 according to the present disclosure has the advantage of simple and compact structure, and is suitable for being used with various types of existing contactors.

It is to be understood that the above detailed embodiments of the disclosure are merely illustrative of or explaining the principles of the disclosure and are not limiting of the disclosure. Therefore, any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Also, it is intended that the following claims cover all such changes and modifications that fall within the scope and boundaries of the claims or the equivalents of the scope and boundaries.

Claims (7)

1. A wiring module (1) for use in conjunction with a contactor (2), comprising:

at least one set of first conductive elements (10), each set comprising a fixed portion (11) and a movable portion (12), the movable portion (12) being adapted to be set in a closed position electrically coupled with the fixed portion (11) or in an open position electrically decoupled from the fixed portion (11); and

a switching member (20) extending along a longitudinal axis (X) and adapted to dispose said movable portion (12) thereon, said switching member (20) being reciprocally movable along said axis (X) driven by a movable contact (212) of said contactor (2) so as to switch said movable portion (12) between said closed position and said open position, and at least one of said movable portion (12) and said movable contact (212) being in an open position;

wherein the switching member (20) comprises an arm (21), the arm (21) being arranged at a position further away from the contactor (2) than the movable portion (12), such that in a movement of the switching member (20) towards the contactor (2), the arm (21) is capable of pushing the movable portion (12) such that the movable portion (12) is electrically decoupled from the fixed portion (11);

wherein in the condition of the movable part (12) in the closed position, the arm (21) is spaced from the movable part (12) by a first distance (D1) and the movable (212) and stationary (211) contacts of the contactor (2) are spaced by a second distance (D2), wherein the first distance (D1) is smaller than the second distance (D2).

2. The junction module (1) according to claim 1, wherein said switching member (20) further comprises a first connection portion (22) provided at an end thereof, said first connection portion (22) being adapted to be connected with said movable contacts (212) to enable actuation of said switching member (20) by said movable contacts (212).

3. The junction module (1) according to any one of claims 1-2, further comprising:

a housing (30) comprising a body (31); and

a first elastic element (40) arranged between the bottom (33) of the body (31) and the movable part (12) and adapted to keep the movable part (12) in the closed position.

4. The junction module (1) of claim 3, wherein the housing (30) further includes a cover plate (32) disposed on the body (31), and the junction module (1) further includes:

a second resilient element (50) arranged between the cover plate (32) and the switching member (20) and adapted to press the switching member (20) in a direction away from the cover plate (32).

5. A contactor assembly (100) comprising:

a contactor (2); and

a junction module (1) according to any one of claims 1-4.

6. A method for manufacturing a junction module (1) according to any one of claims 1 to 4, comprising:

-providing at least one set of said first conductive elements (10), each set comprising said fixed portion (11) and said movable portion (12);

-arranging said movable part (12) on said switching member (20); and

-arranging said switching member (20) in said wiring module (1) in such a way as to be reciprocally movable along said axis (X) driven by a movable contact (212) of said contactor (2), so as to enable said movable portion (12) to be switched between a closed position and an open position;

wherein the switching member (20) comprises an arm (21), the arm (21) being arranged at a position further away from the contactor (2) than the movable portion (12), such that in a movement of the switching member (20) towards the contactor (2), the arm (21) is capable of pushing the movable portion (12) such that the movable portion (12) is electrically decoupled from the fixed portion (11);

wherein in the condition of the movable part (12) in the closed position, the arm (21) is spaced from the movable part (12) by a first distance (D1) and the movable (212) and stationary (211) contacts of the contactor (2) are spaced by a second distance (D2), wherein the first distance (D1) is smaller than the second distance (D2).

7. A method for manufacturing the contactor assembly (100) of claim 5, comprising:

connecting the movable contact (212) of the contactor (2) with a switching element (20) of a junction module (1) according to any one of claims 1 to 4.

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