WO2022257294A1 - Parallel-connected dual module motor controller drive structure, and motor controller - Google Patents

Abstract

Disclosed are a parallel-connected dual module motor controller drive structure and a motor controller. The drive structure is used for performing drive control on a motor and comprises a drive board, board-to-board connectors, an upper adapter board, a lower adapter board, and six power modules; the drive board is separately connected to the upper adapter board and the lower adapter board by means of the board-to-board connectors; and sets of three power modules are respectively arranged on a top part of the upper adapter board and a bottom part of the lower adapter board, or sets of three power modules are respectively arranged on a bottom part of the upper adapter board and a top part of the lower adapter board. The described structure is optimized to remedy the problem of uneven currents between power modules, the size of a motor controller is reduced, the power density of a controller is improved, the lengths of alternating and direct current busbars are maximally reduced, stray inductance of a busbar is reduced, and the reliability of the motor controller is greatly improved.

Description

A dual-module parallel motor controller driving structure and motor controller technical field

The invention belongs to the technical field of motor controllers, and in particular relates to a dual-module parallel motor controller driving structure and a motor controller.

Background of the invention

In the application of large electric commercial vehicles such as buses and heavy trucks, higher and higher requirements are put forward for the output power of the motor controller. The current conventional single IGBT or silicon carbide module can no longer meet the application requirements, and dual Parallel connection of modules, the design scheme of connecting two IGBT modules or silicon carbide modules in parallel to increase the current capacity is more and more widely used in the field of electric vehicle motor controllers. The specific structure is shown in Figure 1. The two drive modules and the high-voltage battery After being connected in parallel, the two electrodes are respectively driven to work, and the output end of the motor is connected with the gear assembly.

In the parallel use of modules, the volume is often large, the power density is not high, and the problem of current imbalance between modules is likely to occur, which will cause accelerated aging of devices flowing through large currents, and even damage the equipment. Currently, the commonly used improvement methods are: Screen the parameters of the IGBT or silicon carbide module itself, and select devices with similar parameters in the same batch for parallel connection. Such an improvement method is often costly and cannot completely solve the problem of uneven current between modules.

Contents of the invention

In view of the above problems, the present invention discloses a dual-module parallel motor controller driving structure and a motor controller, which are optimized to improve the problem of uneven flow between power modules, and can reduce the volume of the motor controller and increase the power density of the controller , to overcome the above problems or at least partly solve the above problems.

In order to achieve the above object, the present invention adopts the following technical solutions:

One aspect of the present invention provides a dual-module parallel motor controller drive structure, which is used to drive and control the motor by connecting two drive modules in parallel to achieve a dual-module parallel motor controller with greater output current , each of the drive modules includes three power modules, and the drive structure includes a drive board, a board-to-board connector, an upper adapter board, a lower adapter board, and six power modules; wherein,

The drive board is respectively connected to the upper adapter board and the lower adapter board through the board-to-board connector;

The three power modules are respectively arranged on the top of the upper adapter board and the bottom of the lower adapter board, or the three power modules are respectively arranged on the bottom of the upper adapter board and the bottom of the lower adapter board. the top of the lower riser board.

Optionally, each of the power modules is arranged symmetrically on the upper adapter board and the lower adapter board.

Optionally, each of the power modules includes two IGBT tubes or silicon carbide modules connected in series.

Optionally, a cooling channel is provided between the upper adapter plate and the lower adapter plate.

Optionally, one drive board is used to control six power modules at the same time.

Optionally, the driving board is arranged between the upper adapter board and the lower adapter board, and the upper adapter board, the driving board and the lower adapter board are layered up and down, and through Copper post or screw fixing.

Optionally, the upper adapter board and the lower adapter board are respectively provided with capacitor modules.

Optionally, the capacitor modules on the upper adapter board and the lower adapter board are also symmetrically arranged.

Optionally, the board-to-board connector includes a board-to-board connection pin and a board-to-board connection socket.

Another aspect of the present invention provides a motor controller of an electric vehicle, wherein the motor controller adopts the drive structure described in any one of the above to drive and control the motor.

Advantage of the present invention and beneficial effect are:

The above technical solution optimizes the structure and circuit of the dual-module parallel motor controller drive circuit to improve the problem of uneven current between power modules, and this design can reduce the volume of the motor controller and increase the power density of the controller.

Specifically, in the present invention, the drive board of the present invention is directly connected to the two adapter boards with a board-to-board connector without passing through a wire harness, and this connection method is more reliable. Moreover, the upper and lower symmetrical connection of the power modules makes the drive paths and output AC busbars of the upper and lower two power modules completely symmetrical, which can better optimize the current sharing problem of the power modules.

The above design also minimizes the length of the AC and DC busbars, reduces the stray inductance of the busbars, further optimizes the current sharing problem of the power module, and greatly improves the reliability of the motor controller.

Brief description of the drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating a preferred embodiment and are not to be considered as limiting the invention. Also throughout the drawings, the same reference numerals are used to designate the same components. In the attached picture:

Fig. 1 is the structural representation of the motor system of double module parallel connection in an embodiment of the present invention;

Fig. 2 is a structural schematic diagram of a drive structure of a dual-module parallel motor controller in an embodiment of the present invention.

Modes of Carrying Out the Invention

In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

It should be understood that the terms "comprising/comprising", "consisting of" or any other variation are intended to cover a non-exclusive inclusion such that a product, apparatus, process or method comprising a series of elements includes not only those elements but also requires may also include other elements not expressly listed, or elements inherent in the product, apparatus, process or method. Without further limitations, an element defined by the phrase "comprising/comprising...", "consisting of... does not exclude the presence of additional the same elements.

It is also to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicate an orientation or positional relationship Based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device, component or structure must have a specific orientation, be constructed or operated in a specific orientation, It should not be construed as a limitation of the present invention.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

The technical solutions provided by various embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figure 2, the present invention provides a dual-module parallel motor controller drive structure, as shown in Figure 1, the drive structure drives and controls the motor through the parallel connection of two drive modules, in some implementations of the application In an example, the motor includes but is not limited to a single motor. Each of the drive modules includes three power modules, and the drive structure includes a drive board, a board-to-board connector, an upper transfer board, a lower transfer board and six power modules.

Specifically, the driving board is respectively connected to the upper adapter board and the lower adapter board through the board-to-board connector.

Each of the three power modules is respectively arranged on the top of the upper adapter board and the bottom of the lower adapter board, or each of the three power modules is respectively arranged on the bottom of the upper adapter board and the bottom of the lower adapter board. the top of the lower riser board.

This embodiment can optimize and improve the problem of uneven flow between power modules, reduce the volume of the motor controller, and increase the power density of the controller.

In a preferred embodiment, each power module is arranged symmetrically on the upper adapter board and the lower adapter board. Through the symmetrical arrangement, the problem of current imbalance generated between the two modules is further reduced, so that the mutual electromagnetic interference is minimized.

In one or some embodiments, as shown in FIG. 1 , each power module includes two IGBT tubes or silicon carbide modules connected in series.

In one or some embodiments, a cooling channel is provided between the upper adapter plate and the lower adapter plate, and the cooling channel is preferably a labyrinth.

In one or some embodiments, one drive board is used to simultaneously control six power modules, thereby reducing the number of drive boards, reducing volume and cost.

In one or some embodiments, the driving board is arranged between the upper adapter board and the lower adapter board, and the upper adapter board, the driving board and the lower adapter board are layered up and down Set and fix with copper pillars or screws.

Through the above-mentioned three-layer structure, the occupied space can be further reduced, the space utilization efficiency inside the motor controller can be improved, and the problem of unbalanced current can be further solved.

In one embodiment, the upper adapter board and the lower adapter board are respectively provided with capacitor modules.

In a preferred embodiment, the capacitor modules on the upper adapter board and the lower adapter board are also symmetrically arranged.

In one or some embodiments, the board-to-board connector includes board-to-board connecting pins and board-to-board connecting pins, which makes the connection convenient, avoids the setting of wire harnesses, and minimizes the length of the AC and DC busbars , which reduces the stray inductance of the busbar and greatly improves the reliability of the motor controller.

Another aspect of the embodiments of the present invention also discloses, for example, a motor controller of an electric vehicle, wherein the motor controller adopts any one of the driving structures described above to drive and control the motor.

The above description is only an implementation manner of the present invention, and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, expansion, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims (10)

1. A dual-module parallel motor controller drive structure, characterized in that the drive structure is used to drive and control the motor in a parallel connection of two drive modules, each of the drive modules includes three power modules, and the drive structure Including driver board, board-to-board connector, upper transfer board, lower transfer board and six power modules; among them,

   The drive board is respectively connected to the upper adapter board and the lower adapter board through the board-to-board connector;

   The three power modules are respectively arranged on the top of the upper adapter board and the bottom of the lower adapter board, or the three power modules are respectively arranged on the bottom of the upper adapter board and the bottom of the lower adapter board. the top of the lower riser board.
2. The drive structure according to claim 1, wherein the power modules are arranged symmetrically on the upper adapter plate and the lower adapter plate.
3. The driving structure according to claim 1, wherein each of the power modules comprises two IGBT tubes or silicon carbide modules connected in series.
4. The driving structure according to claim 1, wherein a cooling water channel is provided between the upper adapter plate and the lower adapter plate.
5. The driving structure according to claim 1, wherein the driving board is one, and is used to control six power modules at the same time.
6. The drive structure according to any one of claims 1-5, characterized in that, the drive plate is arranged between the upper adapter plate and the lower adapter plate, and the upper adapter plate, the drive The board and the lower adapter board are arranged in layers up and down, and are fixed by copper pillars or screws.
7. The drive structure according to claim 6, wherein capacitor modules are respectively arranged on the upper adapter board and the lower adapter board.
8. The drive structure according to claim 7, wherein the capacitor modules on the upper adapter board and the lower adapter board are also symmetrically arranged.
9. The driving structure according to claim 8, wherein the board-to-board connector includes a board-to-board connecting pin and a board-to-board connecting pin seat.
10. A motor controller for an electric vehicle, characterized in that the motor controller adopts the drive structure according to any one of claims 1-9.

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