Motor control apparatus

Abstract

The utility model relates to motor control equipment. The motor control equipment comprises a box body, a main control board, a driving device, a capacitor plate, a shielding plate, an insulating module, a heat dissipation fan and a heat dissipation part, the box body is provided with a cavity with an opening in one end, and the main control board, the capacitor board and the driving device are sequentially arranged in the cavity of the box body in a stacked mode; the shielding plate is arranged between the main control board and the capacitor plate and is connected with the box body through a supporting part; the output end of the main control board is electrically connected with the input end of the driving device, the output end of the capacitor board is electrically connected with the input end of the driving device, and the output end of the driving device is suitable for being electrically connected with an external motor; the insulation module is arranged in the cavity of the box body and comprises a copper bar and bakelite; the capacitors are connected through copper bar bakelite; the cooling fan is arranged at the bottom of the box body, and the blowing end of the cooling fan faces the interior of the cavity of the box body; and the heat dissipation part is arranged on the side wall of the box body. The air cooling mode is adopted, the heat dissipation fan and the heat dissipation part are integrated, and the heat dissipation capacity is high.

Description

Technical Field

[0001] The present application relates to the technical field of motor control, and in particular to a motor control device. Background Art

[0002] With the continuous development of battery technology and the maturity of high-power electronic and electrical technology, electricity is widely used in special equipment. In order to improve the efficiency of electricity utilization, motor drive controllers that can convert power are particularly important today. However, the existing motor drive controllers have the problem of poor heat dissipation capacity. Due to the complex structure of the electronic devices inside the motor drive controller and the small net spacing between the electronic devices, the heat dissipation of multiple electronic devices working at the same time is large. For reference, the motor controller housing for electric vehicles with the publication number CN209376072U has no heat dissipation structure, resulting in poor heat dissipation capacity of the motor drive controller, which will not only shorten the service life of the motor drive controller, but also cause safety hazards.

[0003] How to enhance the heat dissipation capability of the motor drive controller and maintain a good working environment inside the motor drive controller has become an urgent problem to be solved by those skilled in the art. Summary of the invention

[0004] In view of this, the present application proposes a motor control device suitable for enhancing the heat dissipation capability of a motor drive controller.

[0005] According to one aspect of the present application, a motor control device is provided, comprising: a box, a main control board, a driving device, a capacitor board, a shielding board, an insulating module, a cooling fan and a cooling part;

[0006] The box body is provided with a cavity with one end open, and the main control board, the capacitor board and the driving device are sequentially stacked inside the cavity of the box body; the shielding plate is arranged between the main control board and the capacitor board, and the shielding plate is connected to the box body through the supporting part;

[0007] The output end of the main control board is electrically connected to the input end of the driving device, the output end of the capacitor board is electrically connected to the input end of the driving device, and the output end of the driving device is suitable for being electrically connected to an external motor;

[0008] The insulation module is arranged inside the cavity of the box, and the insulation module includes: a copper busbar and bakelite; the capacitor is connected through the copper busbar and bakelite;

[0009] The cooling fan is arranged at the bottom of the box, and the blowing end of the cooling fan faces the interior of the cavity of the box;

[0010] The heat dissipation part is arranged on the side wall of the box body.

[0011] In a possible implementation, the heat dissipation portion is two or more heat dissipation holes;

[0012] Two or more heat dissipation holes are arranged adjacent to each other.

[0013] In a possible implementation, the box body is provided with more than two blowing holes;

[0014] More than two air blowing holes are opened on the bottom plate of the box; the cooling fan is suitable for blowing air into the box through the air blowing holes.

[0015] In a possible implementation, the box body is provided with a fan mounting plate;

[0016] The cooling fan is arranged between the bottom plate and the fan mounting plate, and the cooling fan is fixed to the box body through the fan mounting plate;

[0017] The fan mounting plate is provided with more than two air inlet holes.

[0018] In a possible implementation, the support portion includes: two or more pillars;

[0019] The length directions of the two or more pillars are perpendicular to the surface where the shielding plate is located.

[0020] In a possible implementation, the shielding plate is provided with: a placement portion;

[0021] The main control board is placed on the shielding board through the placement portion.

[0022] In a possible implementation, the placement portion includes: more than two bosses.

[0023] In a possible implementation, the copper busbar is a three-phase copper busbar.

[0024] In a possible implementation, the bakelite is provided with three conductive parts arranged in sequence;

[0025] The three-phase copper busbar is connected to three conductive parts.

[0026] In a possible implementation, the box body is provided with air holes;

[0027] The ventilation holes are arranged on the side wall of the box body.

[0028] Beneficial effects: The present application adopts air cooling, integrates the cooling fan and the heat dissipation part, and can cool down the inside of the box at the same time, with excellent cooling effect, simple overall cooling structure, simple cooling method, and effectively maintains a good working environment inside the motor controller. The present application has compact structure, light weight, high space utilization, high power density, strong heat dissipation capacity, high power density, low processing cost, and is stable and reliable.

[0029] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and, together with the description, serve to explain the principles of the present application.

[0031] Figure 1 An exploded diagram showing the structure of a motor control device according to an embodiment of the present application;

[0032] Figure 2 A main structural diagram of a motor control device according to an embodiment of the present application is shown;

[0033] Figure 3 A partial structural diagram of a motor control device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0034] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0035] Among them, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model or simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0038] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0039] Figure 1 An exploded diagram showing the structure of a motor control device according to an embodiment of the present application; Figure 2 The main structure diagram of the motor control device of the embodiment of the present application is shown. Figure 1 As shown, the motor control device comprises: a box 100, a main control board 200, a driving device 500, a capacitor plate 400, a shielding plate 300, an insulating module, a cooling fan 600 and a heat dissipation part 190; the box 100 is provided with a cavity with one end open, the main control board 200, the capacitor plate 400 and the driving device 500 are sequentially stacked inside the cavity of the box 100; the shielding plate 300 is arranged between the main control board 200 and the capacitor plate 400, and the shielding plate 300 is connected to the box 100 through a supporting part; the output end of the main control board 200 is connected to the driving fan 60 ... The input end of the device 500 is electrically connected, the output end of the capacitor plate 400 is electrically connected to the input end of the driving device 500, and the output end of the driving device 500 is suitable for being electrically connected to an external motor; the insulating module is arranged inside the cavity of the box 100, and the insulating module includes: a copper bus 810 and a bakelite 800; the capacitor plate 400 is connected to the bakelite 800 through the copper bus 810; the cooling fan 600 is arranged at the bottom of the box 100, and the blowing end of the cooling fan 600 faces the cavity of the box 100; the heat dissipation part 190 is arranged on the side wall of the box 100.

[0040] Here, it should be noted that the housing 100 is suitable for sealing electronic components such as the main control board 200 and the drive device 500, so that the main control board 200 and the drive device 500 are arranged in order in the housing 100, and the external power supply is isolated, which can effectively prevent the interference signal from being inserted to protect the internal electronic components from electromagnetic interference, and can avoid wear and corrosion. The main control board 200, the capacitor plate 400 and the drive device are stacked in sequence to effectively improve the utilization rate of the internal cavity of the housing 100. The main control board 200 is used to receive the control signal sent from the upper layer, and outputs the upper layer signal to the drive device 500 after processing, and the drive device 500 drives the motor to work through the drive signal of the main control board 200. The capacitor plate 400 is suitable for filtering the direct current transmitted from the outside and outputting it to the drive device 500, so that the voltage fluctuation on the DC line is kept within the allowable range, and the influence of voltage overshoot and transient overvoltage is slowed down. The setting of the shielding plate 300 can avoid signal interference between the main control board 200 and the driving device 500, and effectively isolate strong and weak electricity. The setting of the support portion can stably install the shielding plate 300 inside the box 100 so as to stably install the main control board 200. The design of the copper bar 810 avoids the possibility of short circuit of the circuit. One end is fixed on the capacitor plate 400, and the other end is connected to the bakelite 800 to enhance the reliability of the circuit and enhance the safety performance. The cooling fan 600 is arranged at the bottom of the box 100, and the blowing end of the cooling fan 600 is toward the cavity inside the box 100. The cooling fan 600 is suitable for cooling and dissipating the electronic components inside the box 100. The present application adopts the air-cooled method, integrating the cooling fan 600 and the heat dissipation part 190, and can cool and cool the inside of the box 100 at the same time, with excellent cooling effect, simple overall cooling structure, simple cooling method, and effective maintenance of good working environment inside the motor controller. The present application has a compact structure, light weight, high space utilization, high power density, strong heat dissipation capability, high power density, low processing cost and is stable and reliable.

[0041] In a possible implementation, the box body 100 is provided with an upper cover 110, which matches the open end of the box body 100, and the upper cover 110 and the box body 100 are detachably connected; it should be noted that the matching and detachable arrangement of the upper cover 110 and the box body 100 is conducive to the timely maintenance of internal components.

[0042] In a possible implementation, it further includes: a locking portion, through which the upper cover 110 is detachably connected to the box body 100. Further, the locking portion includes: more than two first bolt holes 111, more than two second bolt holes and bolts, the more than two first bolt holes 111 are arranged around the side of the upper cover 110, the more than two second bolt holes are arranged around the side of the top surface of the box body 100, the more than two first bolt holes 111 and the more than two second bolt holes are arranged one by one, and the locking of the bolts realizes the fixed connection between the upper cover 110 and the box body 100. Further, the first bolt holes 111 and the second bolt holes are each provided with 8.

[0043] In a possible implementation, the main body of the box body 100 is a rectangular parallelepiped structure with an opening on one side; the main body of the upper cover 110 is a rectangular plate structure.

[0044] In a possible implementation, the heat dissipation portion 190 is two or more heat dissipation holes; Figure 2 As shown, after more than two heat dissipation holes are in the form of long strip-shaped hole structures, more than two heat dissipation holes are arranged adjacent to each other in sequence along the length direction of the box body 100, and the spacing distance between each heat dissipation hole is the same, which can effectively ensure the uniformity of heat dissipation.

[0045] In a possible implementation, the box 100 is provided with more than two blowing holes; the more than two blowing holes are opened on the bottom plate 101 of the box 100; the cooling fan 600 is suitable for blowing air into the box 100 through the blowing holes. It should be noted that the cooling fan 600 is an embedded installation structure relative to the box 100, and a certain distance is set between the bottom plate 101 of the box 100 and the bottom edge of the four side walls of the box 100 to form a cavity for installing the cooling fan 600. Furthermore, the more than two blowing holes are arranged in a circular mesh structure in sequence, and the more than two blowing holes are directly arranged opposite to the cooling fan 600, which can effectively improve the blowing efficiency of the cooling fan 600.

[0046] In a possible implementation, the housing 100 is provided with a fan mounting plate 610; the fan is arranged between the bottom plate 101 and the fan mounting plate 610, and the cooling fan 600 is fixed to the housing 100 via the fan mounting plate 610. It should be noted here that in order to achieve a firm installation of the cooling fan 600, the fan mounting plate 610 is installed at the bottom of the housing 100, the cooling fan 600 is fixed above the fan mounting plate 610 by bolts, and the fan mounting plate 610 is fixedly connected to the housing 100 by welding or bolting. The fan mounting plate 610 is provided with more than two air inlet holes 611. Figure 1As shown, more than two air inlet holes 611 are arranged in sequence to form a circular mesh structure, and more than two air inlet holes 611 are directly arranged opposite to the heat dissipation fan 600, which can effectively improve the air intake efficiency.

[0047] It should be noted that a control chip is provided on the main control board 200, and the input end of the control chip is electrically connected to the bus for receiving control signals sent from the upper layer and processing the upper layer signals. The output end of the control chip is electrically connected to the input end of the driving device 500 to output control signals.

[0048] In a possible implementation, the driving device 500 includes: a MOS board and a MOS tube; the input end of the MOS board is connected to a DC power supply and a control signal, the output end of the MOS board is electrically connected to the MOS tube, the MOS board and the MOS tube are both arranged below the shielding plate 300, and the MOS board can output a driving signal to the MOS tube to control the switching state of the MOS tube, which can be specifically controlled by pulse width modulation (PWM) and the like. The MOS tube is used to output a periodic current signal to the external motor. There can be more than two MOS tubes, and the MOS tube can be an enhanced N-channel MOS tube or an enhanced P-channel MOS tube.

[0049] In a possible implementation, the input end of the MOS board is electrically connected to the control chip of the main control board 200 through a pin, suitable for receiving the control signal of the main control board 200. The output end of the MOS board is electrically connected to the MOS tube through a wire, suitable for outputting a driving signal to the MOS tube.

[0050] In a possible implementation, one pole of the capacitor plate 400 is electrically connected to the MOS board, and the other pole of the capacitor plate 400 is electrically connected to the DC aviation connection plug 120 to access the DC power supply. Here, it should be noted that the capacitor plate 400 is suitable for sorting and filtering the DC power input and then outputting it to the MOS board to provide working power for the driving device 500.

[0051] It should be noted that the MOS board is provided with more than two pins, which sequentially penetrate the capacitor board 400, the shielding board 300 and the main control board 200. The MOS board is electrically connected to the main control board 200 and the capacitor board 400 through the more than two pins to achieve transmission of electrical signals.

[0052] In a possible implementation, the support portion includes: more than two pillars 310; the length direction of the two or more pillars 310 is perpendicular to the surface where the shielding plate 300 is located. Further, there are four pillars 310. It should be noted that one end of the four pillars 310 is respectively located at the four corners of the shielding plate 300, and the other ends of the four pillars 310 are respectively located at the bottom of the box 100.

[0053] Furthermore, the size of the shielding plate 300 matches the cross-sectional size of the box 100. When the shielding plate 300 is placed inside the box 100, the four side walls of the shielding plate 300 just touch the four inner walls of the box 100, and the four pillars 310 are respectively installed and placed close to the four inner corners of the box 100.

[0054] In a possible implementation, the shielding plate 300 is provided with: a placement portion; the main control board 200 is placed on the shielding plate 300 through the placement portion. Further, the placement portion includes: two or more bosses; the two or more bosses are respectively located on the same side of the shielding plate 300, and when the main control board 200 is placed on the shielding plate 300, the bosses can support the main control board 200, so that the main control board 200 is not completely covered on the shielding plate 300, and normal heat dissipation of the main control board 200 can be ensured.

[0055] In a possible implementation, there are three copper bars 810. One end of the three copper bars 810 is respectively connected to the UVW three-phase electricity of the capacitor plate 400, and the other end of the three copper bars 810 is connected to the bakelite 800. At the same time, the three copper bars 810 are also connected to the three copper columns on the MOS board.

[0056] In a possible implementation, the bakelite 800 is provided with three conductive parts arranged in sequence; the three-phase copper busbar 810 is connected to the three conductive parts. Figure 1 As shown, the three conductive parts are fixedly connected to form a "mountain" shape structure, and the three ends of the three copper bars 810 are respectively connected to the three conductive parts.

[0057] In a possible implementation, it further includes: a current transformer; the current transformer is disposed inside the cavity of the box body 100 , and the current transformer is electrically connected to the main control board 200 .

[0058] In a possible implementation, the device further includes: a relay board 700 , which is disposed above the shielding board 300 and adjacent to the main control board 200 . The relay 700 is electrically connected to the main control board 200 .

[0059] The shielding plate 300 is provided with: a second placement portion; the relay board 700 is placed on the shielding plate 300 through the second placement portion. Further, the second placement portion includes: three bosses; the three bosses are respectively located on the same side of the shielding plate 300, and when the relay board 700 is placed on the shielding plate 300, the bosses can support the relay board 700, so that the relay board 700 is not completely covered on the shielding plate 300, and normal heat dissipation of the relay board 700 can be ensured.

[0060] In a possible implementation, it also includes: more than two aviation connection plugs; more than two aviation connection plugs are arranged in sequence on the side wall of the box 100 along the length direction of the box 100. The two ends of the more than two aviation connection plugs are respectively located on the inner and outer sides of the box 100. Furthermore, the outer wall of the box 100 is provided with an opening, and the opening matches the aviation connection plug, and the aviation connection plug is installed on the outer wall of the box 100 through the opening. It should be noted that the aviation connection plug is suitable for electrical connection between electronic components inside the box 100 and electronic components outside the box 100, while further improving the anti-interference effect, facilitating the connection or disconnection between circuits, and effectively reducing the use of physical wires.

[0061] In one possible implementation, an insulating rubber pad is provided between the box 100 and each aviation connection plug. The insulating rubber pad can not only reduce the interference effect of external interference signals on the electronic components inside the box 100, but also make the installation of the aviation connection plug smoother, thereby ensuring that the aviation connection plug will not fall off the box 100 during operation.

[0062] In a possible implementation, four aviation connection plugs are provided, and the four aviation connection plugs are: a three-phase aviation connection plug 130 , a resolver aviation connection plug 140 , a debugging aviation connection plug 150 , and a DC aviation connection plug 120 .

[0063] Furthermore, the motor control chip input end of the main control board 200 is electrically connected to one end of the debugging aviation connection plug 150 through a bus, and the other end of the debugging aviation connection plug 150 is connected to the control signal; the motor control chip receives the signal of the upper controller through the debugging aviation connection plug 150.

[0064] Furthermore, the input end of the three-phase aviation connection plug 130 is electrically connected to the output end of the driving device 500 , and the output end of the three-phase aviation connection plug 130 is electrically connected to the external motor.

[0065] Furthermore, the output end of the DC aviation connection plug 120 is electrically connected to the input end of the capacitor plate 400 , and the input end of the DC aviation connection plug 120 is electrically connected to an external DC power source.

[0066] Furthermore, the output end of the resolver aviation connection plug 140 is electrically connected to the motor control chip. In the temperature signal detection circuit, the motor control chip of the main control board 200 is electrically connected to the external temperature sensor through the temperature interface of the resolver aviation connection plug 140. The temperature signal detection circuit receives the external signal and transmits it to the control chip, which is suitable for detecting the temperature of the external motor. In the position signal processing circuit, the motor control chip of the main control board 200 is electrically connected to the external position sensor through the position sensor signal input interface of the resolver aviation connection plug 140. The position signal processing circuit receives the external signal and transmits it to the motor control chip, which is suitable for detecting the position of the external motor.

[0067] The bus voltage detection circuit is electrically connected to the motor control chip through the voltage acquisition board. The bus voltage detection circuit is suitable for detecting the positive and negative voltages at both ends of the capacitor plate 400 and outputting a voltage signal to the main control board 200 .

[0068] One end of the debugging interface circuit is electrically connected to the debugging aviation connection plug 150, and the other end is electrically connected to the motor control chip. The debugging interface circuit receives external signals through the debugging aviation connection plug 150 and transmits them to the motor control chip, which is suitable for debugging the working program of the motor drive control device.

[0069] In a possible implementation, the box 100 is provided with a shock absorbing part 160, and the shock absorbing part 160 is arranged at the bottom of the box 100. Further, the shock absorbing part 160 includes: a connector and a shock absorbing pad; the connector is arranged on the side wall of the box 100, and the shock absorbing pad runs through the connector. Further, there are four shock absorbing parts 160, and the four shock absorbing parts 160 are respectively arranged at the four corners of the bottom of the box 100, and each shock absorbing part 160 is equipped with a shock absorbing pad, which is suitable for the stable installation of the box 100 to reduce the impact of vibration on the equipment. At the same time, the box 100 is provided with a grounding column 170, and the grounding column 170 is fixed on the outer wall of the box 100.

[0070] In a possible implementation, the box 100 is provided with two hand-held parts, and the two hand-held parts are arranged on the side walls of the box 100. Further, the hand-held part is a handle of a "Π"-shaped structure, and the open end of the "Π"-shaped structure is hinged to the side wall of the box 100 to improve the overall mobility.

[0071] In a possible implementation, the box body 100 is provided with an air vent 180, which is arranged on the side wall of the box body 100. Furthermore, the air vent 180 is a circular tube structure and is provided with a detachable sealing cap 180. The sealing cap 180 can seal the air vent 180 at any time by bolt connection.

[0072] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A motor control device, characterized in that: include: Box body, main control board, drive device, capacitor board, shielding board, insulation module, cooling fan and heat dissipation unit; The box body is provided with a cavity with one end open, and the main control board, the capacitor board and the driving device are sequentially stacked inside the cavity of the box body; the shielding plate is arranged between the main control board and the capacitor board, and the shielding plate is connected to the box body through a supporting part; The output end of the main control board is electrically connected to the input end of the driving device, the output end of the capacitor board is electrically connected to the input end of the driving device, and the output end of the driving device is suitable for being electrically connected to an external motor; The insulating module is arranged inside the cavity of the box, and the insulating module comprises: a copper busbar and bakelite; the capacitor is connected to the bakelite through the copper busbar; The cooling fan is arranged at the bottom of the box, and the blowing end of the cooling fan faces the interior of the cavity of the box; The heat dissipation portion is arranged on the side wall of the box body.

2. The motor control device according to claim 1, characterized in that: The heat dissipation portion is two or more heat dissipation holes; More than two heat dissipation holes are arranged adjacent to each other.

3. The motor control device according to claim 1, characterized in that: The box body is provided with more than two blowing holes; More than two air blowing holes are provided on the bottom plate of the box; and the cooling fan is suitable for blowing air into the box through the air blowing holes.

4. The motor control device according to claim 3, characterized in that: The box body is provided with a fan mounting plate; The cooling fan is arranged between the bottom plate and the fan mounting plate, and the cooling fan is fixed to the box body through the fan mounting plate; The fan mounting plate is provided with more than two air inlet holes.

5. The motor control device according to claim 1, characterized in that: The support portion includes: two or more pillars; The length directions of the two or more pillars are perpendicular to the surface where the shielding plate is located.

6. The motor control device according to claim 1, characterized in that: The shielding plate is provided with: a placement portion; The main control board is placed on the shielding plate through the placement portion.

7. The motor control device according to claim 6, characterized in that: The placement portion includes: more than two bosses.

8. The motor control device according to claim 1, characterized in that: There are three copper bars.

9. The motor control device according to claim 8, characterized in that: The bakelite is provided with three conductive parts arranged in sequence; The three copper bars are connected to the three conductive parts respectively.

10. The motor control device according to claim 1, characterized in that The box body is provided with air holes; The air holes are arranged on the side wall of the box body.

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