Motor control box

Abstract

The utility model relates to a motor control box. The motor control box comprises a box body, a main control board, a driving device, a capacitor board and a shielding 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 box body is provided with an upper cover, the upper cover is matched with the open end of the box body, and the upper cover is detachably connected with the box body; 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 shielding part is arranged between the main control board and the capacitor; the shielding part comprises a first shielding plate, a second shielding plate and a first supporting part; the first supporting part is arranged between the first shielding plate and the second shielding plate. By arranging the box body, the first shielding plate and the second shielding plate, the number of internal and external interference signals can be effectively reduced, and the problem of signal disorder is solved.

Description

Technical Field

[0001] The present application relates to the technical field of motor control, and in particular to a motor control box. 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 utilization efficiency of electricity, motor control equipment that can convert power is particularly important today. Among the existing motor control equipment, the parallel MOS motor controller with the publication number CN203289380U can be referred to; it includes a controller main frame composed of a heat dissipation base plate and a box connected to the heat dissipation base plate, and a main control board, a MOS board, a signal connector, a conductive column, a current sensor and a capacitor plate installed in the controller main frame, wherein the MOS board is closely attached to the heat dissipation base plate, and the signal connector and the current sensor are respectively installed on the main control board; it also includes a main control board mounting bracket and a capacitor plate, and the main control board mounting bracket and the capacitor plate are respectively connected above the heat dissipation base plate; the main control board is connected to the main control board mounting bracket. As a high-power device, the driving module is most likely to generate electromagnetic interference between the main control board and the driving module, and the technology does not set a shielding device for signal shielding. Electromagnetic interference not only seriously affects the normal operation of the motor control equipment, but also creates safety hazards.

[0003] How to effectively reduce signal interference between electronic devices and ensure efficient and stable operation of motor control equipment has become an urgent problem to be solved by technical personnel in this field. Summary of the invention

[0004] In view of this, the present application proposes a motor control box suitable for reducing signal interference between electronic devices.

[0005] According to one aspect of the present application, there is provided a motor control box, comprising: a box body, a main control board, a driving device, a capacitor plate and a shielding 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;

[0007] The box body is provided with an upper cover, which matches the open end of the box body, and the upper cover and the box body are detachably connected;

[0008] 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;

[0009] The shielding part is arranged between the main control board and the capacitor; the shielding part comprises: a first shielding plate, a second shielding plate and a first supporting part; the first supporting part is arranged between the first shielding plate and the second shielding plate.

[0010] In one possible implementation, the capacitor plate is provided with a spacer;

[0011] The spacer is arranged between the capacitor plate and the second shielding plate.

[0012] In a possible implementation, the device further includes: a communication interface card;

[0013] The communication interface board is arranged between the first shielding plate and the second shielding plate.

[0014] In a possible implementation, the device further includes: a second supporting portion;

[0015] The second supporting portion is arranged between the capacitor plate and the inner wall of the box body.

[0016] In a possible implementation, the first support portion includes: two or more pillars;

[0017] The length directions of the two or more pillars are perpendicular to the surface where the second shielding plate is located.

[0018] In a possible implementation, four first pillars are provided.

[0019] In a possible implementation, both the first shielding plate and the second shielding plate are provided with a protruding support mounting portion;

[0020] Two ends of the pillar are respectively connected to two support mounting parts.

[0021] In a possible implementation, the method further includes: a current transformer;

[0022] The current transformer is arranged inside the cavity of the box;

[0023] The input end of the current transformer is electrically connected to the capacitor board, and the output end of the current transformer is electrically connected to the main control board through a twisted pair line.

[0024] In a possible implementation, it further includes: two or more aviation connection plugs;

[0025] More than two aviation connection plugs are arranged on the side wall of the box body.

[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 effect: The setting of the first shielding plate can avoid signal interference between the main control board and the drive device, and effectively isolate strong and weak electricity. The setting of the second shielding plate can avoid signal interference between the drive device and the capacitor plate. The overall structure of the present application is complete. While reducing the volume, the setting of the box, the first shielding plate and the second shielding plate can effectively reduce the number of internal and external interference signals, solve the problem of signal clutter, and thus ensure the normal operation of the whole.

[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 view of the structure of the motor control box of an embodiment of the present application is shown;

[0032] Figure 2 The main structure diagram of the motor control box of the embodiment of the present application is shown. DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] Figure 1 An exploded view of the structure of the motor control box of an embodiment of the present application is shown; Figure 2 The main structure diagram of the motor control box of the embodiment of the present application is shown. Figure 1 As shown, the motor control box comprises: a box body 100, a main control board 200, a driving device, a capacitor plate 600 and a shielding part; the box body 100 is provided with a cavity with an opening at one end, and the main control board 200, the capacitor plate 600 and the driving device are sequentially stacked inside the cavity of the box body 100; the box body 100 is provided with an upper cover 110, the upper cover 110 matches the open end of the box body 100, and the upper cover 110 is detachably connected to the box body 100; the output end of the main control board 200 is electrically connected to the input end of the driving device, one pole of the capacitor plate 600 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 shielding part is arranged between the main control board 200 and the capacitor plate 600; the shielding part comprises: a first shielding plate 300, a second shielding plate 500 and a first supporting part; the first supporting part is arranged between the first shielding plate 300 and the second shielding plate 500.

[0039] 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, so that the main control board 200, the capacitor plate 600, and the drive device 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 at the same time. The upper cover 110 is matched with the housing 100 and can be detachably arranged to facilitate the timely maintenance of the internal components. The main control board 200, the capacitor plate 600 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 the upper layer signal is processed and output to the drive device, and the drive device drives the motor to work through the drive signal of the main control board 200. The capacitor plate 600 is suitable for filtering the direct current transmitted from the outside and outputting it to the drive device, 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 part can effectively extend the distance between the main control board 200 and the driving device. The double-layer setting of the first shielding plate 300 and the second shielding plate 500 can avoid signal interference between the driving device and the capacitor plate 600 and effectively isolate strong and weak electricity. The setting of the supporting part can firmly support the first shielding plate 300 and the second shielding plate 500 so that the preset distance between the two remains unchanged. The overall structure of the present application is complete. While reducing the volume, by setting the box 100, the first shielding plate 300 and the second shielding plate 500, the number of internal and external interference signals can be effectively reduced, and the problem of signal clutter can be solved, thereby ensuring the normal operation of the whole.

[0040] 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, more than two second bolt holes and bolts, the more than two first bolt holes 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 are arranged one-to-one with the more than two second bolt holes, and the upper cover 110 and the box body 100 are fixedly connected by locking with the bolts.

[0041] 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 to output control signals.

[0042] In a possible implementation, the driving device includes: a MOS board 700 and a MOS tube; the input end of the MOS board 700 is connected to a DC power supply and a control signal, the output end of the MOS board 700 is electrically connected to the MOS tube, the MOS board 700 and the MOS tube are both arranged at the bottom of the box 100, and the MOS board 700 can output a driving signal to the MOS tube to control the switch state of the MOS tube, which can be specifically controlled by pulse width modulation (PWM) and other methods. 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.

[0043] In a possible implementation, the input end of the MOS board 700 is electrically connected to the control chip of the main control board 200 through a twisted pair, which is suitable for receiving the control signal of the main control board 200. The output end of the MOS board 700 is electrically connected to the MOS tube through a twisted pair, which is suitable for outputting a driving signal to the MOS tube. Using a twisted pair as a conductor for electrical connection has high reliability and is easy to use. At the same time, it can improve the anti-interference ability between electronic components and effectively suppress common-mode interference.

[0044] In a possible implementation, the output end of the capacitor plate 600 is electrically connected to the MOS board 700, and the input end of the capacitor plate 600 is electrically connected to the DC aviation connection plug 170 to access the DC power supply. Here, it should be noted that the capacitor plate 600 is suitable for sorting and filtering the input DC power and then outputting it to the MOS board 700 to provide working power for the driving device.

[0045] In a possible implementation, the capacitor plate 600 is provided with a pad, which is disposed between the capacitor plate 600 and the second shielding plate 500. It should be noted that the pad is suitable for supporting the second shielding plate 500 so that the second shielding plate 500 is stably disposed between the capacitor plate 600 and the driving device.

[0046] In a possible implementation, it further includes: a communication interface card 400; the communication interface card 400 and the second shielding plate 500 are respectively located on opposite sides of the capacitor plate 600. Further, the communication interface card 400 is fixedly arranged between the first shielding plate 300 and the second shielding plate 500. Under the isolation effect of the first shielding plate 300, the interference signal between the main control board 200 and the communication interface card 400 can be effectively isolated. Under the isolation effect of the second shielding plate 500, the interference signal between the capacitor plate 600 and the communication interface card 400 can be effectively isolated.

[0047] In a possible implementation, it further includes: a second support portion; the second support portion is arranged between the capacitor plate 600 and the inner wall of the box body 100. In order to make way for the driving device, the second support portion is arranged to support the capacitor plate 600. Further, the second support portion includes: four support rods, and the four support rods are vertically arranged at the four corners of the bottom of the capacitor plate 600.

[0048] In a possible implementation, the first support portion includes: more than two pillars 510; the length direction of the two or more pillars 510 is perpendicular to the surface where the second shielding plate 500 is located. Further, there are four pillars 510. It should be noted that one end of the four pillars 510 is respectively located at the four corners of the second shielding plate 500, and the other ends of the four pillars 510 are respectively located at the four corners of the first shielding plate 300.

[0049] In a possible implementation, both the first shielding plate 300 and the second shielding plate 500 are provided with protruding support mounting portions 310; and both ends of the support pillar 510 are respectively connected to the two support mounting portions 310. Figure 1 As shown, four support mounting portions 310 are protruding from the edge of the first shielding plate 300 , and four support mounting portions 310 are also protruding from the edge of the second shielding plate 500 . Both ends of the four pillars 510 are fixedly connected to the upper and lower support mounting portions 310 by bolts.

[0050] In a possible implementation, the first shielding plate 300 is provided with a first placement portion 320, and the first placement portion 320 is located on the side of the first shielding plate 300 where the main control board 200 is installed. Further, the first placement portion 320 includes: four protruding round platforms; the four corners of the main control board 200 are respectively placed on the four round platforms, and the main control board 200 can be suspended on the first shielding plate 300 through the first placement portion 320, which can effectively improve the heat dissipation efficiency of the main control board 200.

[0051] In a possible implementation, the first shielding plate 300 is provided with a second placement portion 520, and the second placement portion 520 is located on the side of the second shielding plate 500 where the communication interface board 400 is installed. Further, the second placement portion 520 includes: four protruding round platforms; the four corners of the communication interface board 400 are respectively placed on the four round platforms, and the communication interface board 400 can be suspended on the second shielding plate 500 through the second placement portion 520, so as to avoid the communication interface board 400 from completely contacting the second shielding plate 500 to affect heat dissipation, thereby effectively improving heat dissipation efficiency.

[0052] In a possible implementation, it further includes: a current transformer 800; the current transformer 800 is disposed inside the cavity of the box 100, and the current transformer 800 is electrically connected to the main control board 200 via a twisted pair. The current transformer 800 is used to collect the current value of the external motor.

[0053] In a possible implementation, it also includes: a current transformer mounting plate 810, the current sensor 500 is mounted on the current transformer mounting plate 810, and the current transformer 800 is installed inside the cavity of the box 100 through the current transformer mounting plate 810. Figure 1 As shown, the main structure of the current transformer mounting plate 810 is a rectangular strip structure, with a mounting hole opened in the middle, and the current transformer 800 is inserted into the mounting hole.

[0054] In a possible implementation, it also includes: more than two aviation connection plugs; more than two aviation connection plugs are arranged on the side wall of the box 100, and the two ends of the more than two aviation connection plugs are respectively located on the inner and outer sides of the box 100. Further, the outer wall of the box 100 is provided with an opening, 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.

[0055] 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.

[0056] In a possible implementation, four aviation connection plugs are provided, and the four aviation connection plugs are all located on the same side of the box 100 , and the four aviation connection plugs are arranged on the box 100 in the form of two rows and two columns.

[0057] Furthermore, the four aviation connection plugs are: a six-phase and rotary transformer aviation connection plug 180, a communication aviation connection plug 160, a debugging aviation connection plug 150, and a DC aviation connection plug 170. The six-phase and rotary transformer aviation connection plug 180 is disposed adjacent to the DC aviation connection plug 170, and the communication aviation connection plug 160 is disposed adjacent to the debugging aviation connection plug 150.

[0058] Furthermore, the control chip input terminal of the main control board 200 is electrically connected to one end of the debugging aviation connection plug 150 , and the debugging aviation connection plug 150 is suitable for controlling and debugging the control chip of the main control board 200 .

[0059] Furthermore, the input end of the six-phase and rotary transformer aviation connection plug 180 is electrically connected to the output end of the driving device, and the output end of the six-phase and rotary transformer aviation connection plug 180 is electrically connected to the external motor.

[0060] Furthermore, the output end of the DC aviation connection plug 170 is electrically connected to the input end of the capacitor plate 600, and the input end of the DC aviation connection plug 170 is electrically connected to an external DC power source.

[0061] Furthermore, the input end of the communication aviation connection plug 160 is electrically connected to the host computer to access the control signal, and the output end of the communication aviation connection plug 160 is electrically connected to the input end of the communication interface board 400. The communication interface board 400 is suitable for parsing low-voltage signals such as detection, communication, and control sent by the host computer; the output end of the communication interface board 400 is electrically connected to the main control board 200.

[0062] In a possible implementation, the main control board 200 is provided with: a position signal processing circuit, a current signal processing circuit, a bus voltage detection circuit, a temperature signal processing circuit and a debugging interface circuit. Each processing circuit is electrically connected to the control chip, and receives external signals through their respective interfaces, and transmits the processed signals to the control chip. Furthermore, an isolated power supply is used between the multiple detection and processing circuits to further effectively reduce the number of interference signals.

[0063] Further, in the temperature signal detection circuit, the control chip of the main control board 200 is electrically connected to the external temperature sensor through the temperature interface of the six-phase and rotary transformer aviation connection plug 180, and 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 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 six-phase and rotary transformer aviation connection plug 180, and the position signal processing circuit receives the external signal and transmits it to the control chip, which is suitable for detecting the position of the external motor. The bus voltage detection circuit is connected to the control chip through the voltage acquisition board, and the bus voltage detection circuit is suitable for detecting the positive and negative voltages at both ends of the capacitor plate 600, and outputs a voltage signal to the main control board 200. 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 control chip. The debugging interface circuit debugs the working procedure of the motor control box through the debugging aviation connection plug 150.

[0064] In a possible implementation, the box 100 is provided with a shock absorbing part, which is arranged at the bottom of the box 100. Further, the shock absorbing part includes: a connector 130 and a shock absorbing pad 131; one side of the connector 130 is arranged on the side wall of the box 100, and the shock absorbing pad 131 is arranged on the other side of the connector 130. Further, there are four connectors 130, which are respectively arranged at the four corners of the bottom of the box 100, and each connector 130 is equipped with a shock absorbing pad 131, which is suitable for stable installation of the box 100 to reduce the impact of vibration on the equipment. The box 100 is also provided with a grounding column 140, and the grounding column 140 is grounded.

[0065] In a possible implementation, the housing 100 is provided with a heat dissipation portion; the heat dissipation portion is arranged on the bottom surface of the housing 100 , and further, the heat dissipation portion is a fan, and the blowing end of the fan faces the interior of the cavity of the housing 100 .

[0066] 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.

[0067] In a possible implementation, the box body 100 is provided with an air vent, which is arranged on the side wall of the box body 100. Furthermore, the air vent is a circular tube structure, and a detachably connected sealing cap 120 is provided on the outside. The sealing cap 120 can seal the air vent at any time by bolt connection.

[0068] 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 box, characterized in that: include: Box, main control board, drive device, capacitor board and shielding part; 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 box body is provided with an upper cover, the upper cover matches the open end of the box body, and the upper cover is detachably connected to the box body; 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 shielding part is arranged between the main control board and the capacitor board; the shielding part comprises: a first shielding plate, a second shielding plate and a first supporting part; The first supporting portion is disposed between the first shielding plate and the second shielding plate.

2. The motor control box according to claim 1, characterized in that: The capacitor plate is provided with a pad; The spacer is disposed between the capacitor plate and the second shielding plate.

3. The motor control box according to claim 1, characterized in that: Also includes: Communication interface board; The communication interface board is arranged between the first shielding plate and the second shielding plate.

4. The motor control box according to claim 1, characterized in that: Also includes: a second support portion; The second supporting portion is disposed between the capacitor plate and an inner wall of the box.

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

6. The motor control box according to claim 5, characterized in that: There are four supporting columns.

7. The motor control box according to claim 5, characterized in that: The first shielding plate and the second shielding plate are both protrudingly provided with a supporting mounting portion; Two ends of the pillar are respectively connected to the two support mounting parts.

8. The motor control box according to claim 1, characterized in that: Also includes: Current transformer; The current transformer is arranged inside the cavity of the box; The input end of the current transformer is electrically connected to the capacitor plate, and the output end of the current transformer is electrically connected to the main control board through a twisted pair cable.

9. The motor control box according to claim 1, characterized in that: Also includes: Two or more aviation connection plugs; The two or more aviation connection plugs are arranged on the side wall of the box body.

10. The motor control box 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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