Control panel and water circulation heat dissipation system for automobile
By setting the discharge capacitor and shunt voltage in the control board, the shutdown and jitter problems caused by the distributed capacitor in the air discharge test of the automotive water circulation heat dissipation structure is solved, ensuring the normal operation and stability of the control board in a high voltage environment.
Patent Information
- Application Number
- CN202420933702.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The control board of the water circulation heat dissipation structure for automobiles is prone to shutdown and jitter due to the influence of distributed capacitance during the air discharge test, which cannot meet the test requirements and is easily damaged by excessive voltage.
A control board is designed, including a transistor group and a discharge capacitor. The discharge capacitor is set between the transistor group and the motor and is diverted to a part of the voltage of the transistor group to prevent the transistor group from bearing excessive voltage, thereby protecting the control board from Damaged.
Under voltage environments of different intensities, the control board can work normally, reducing damage due to excessive voltage, and ensuring the stability and reliability of the heat dissipation system.
Smart Images
Figure CN222301420U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electronic circuits, in particular to a control panel and an automobile water circulation heat dissipation system. Background Art
[0002] Electrostatic discharge (ESD) refers to the uncontrolled transfer of static charge from one object to another. Although the total amount of static electricity transferred when electrostatic discharge occurs is usually small, the energy of the discharge accumulates in a small area on the silicon wafer. Generally, the peak current of ESD is between a few amperes and more than ten amperes, and the damage to the internal circuit and the quality of the ESD protection circuit are mainly determined by the peak current. Moreover, the occurrence time of ESD events is generally in nanoseconds, so it is particularly important to quickly discharge the current at the peak current and clamp the high voltage.
[0003] The overall structure of the current automobile water circulation heat dissipation structure includes a metal cover, a control board and a motor. In order to ensure the normal use of the heat dissipation structure, the heat dissipation structure needs to be subjected to a 25kv air discharge test. The air discharge test uses an ESD simulator to test the heat dissipation structure, so that the discharge electrode of the simulator gradually approaches the heat dissipation structure until a spark breakdown channel is formed between the electrode and the heat dissipation structure, causing discharge. Since the control board of the heat dissipation structure is close to the metal cover, distributed capacitance will be generated, affecting the normal operation of the control board, causing the heat dissipation equipment to shut down, jitter, and other phenomena, which cannot meet the test requirements. Utility Model Content
[0004] The embodiment of the utility model provides a control panel and a car water circulation heat dissipation system, so as to realize a simple structure, reduce the situation where the control panel is damaged due to excessive voltage, and can work normally under voltage environments of different strengths.
[0005] According to one aspect of the utility model, a control board is provided for controlling a motor, comprising:
[0006] A power supply, including a power input terminal and a power output terminal;
[0007] at least one transistor group, a first end of the transistor group is electrically connected to the power output end, a second end of the transistor group is electrically connected to the power input end, and a third end of the transistor group is electrically connected to the motor;
[0008] At least one first type of discharge capacitor, wherein a first end of the first type of discharge capacitor is electrically connected to the third end of the transistor group, and a second end of the first type of discharge capacitor is electrically connected to the power input end.
[0009] Optionally, the transistor group includes a first transistor and a second transistor, the collector of the first transistor is electrically connected to the power output terminal, the emitter of the first transistor is electrically connected to the collector of the second transistor, the emitter of the first transistor is electrically connected to the motor, and the emitter of the second transistor is electrically connected to the power input terminal.
[0010] Optionally, a metal foil is further included, wherein the metal foil is arranged at the bottom of the at least one transistor group and is electrically connected to the collector of the first transistor and / or the collector of the second transistor.
[0011] Optionally, the capacitance of the first type of discharge capacitor is 47nF-100nF.
[0012] Optionally, three transistor groups are included, namely a first transistor group, a second transistor group and a third transistor group;
[0013] The control board includes three first-type discharge capacitors, namely a first discharge capacitor, a second discharge capacitor and a third discharge capacitor;
[0014] The third end of the first transistor group and the first end of the first discharge capacitor are electrically connected to the first end of the motor, the third end of the second transistor group and the first end of the second discharge capacitor are electrically connected to the second end of the motor, and the third end of the third transistor group and the first end of the third discharge capacitor are electrically connected to the third end of the motor.
[0015] Optionally, a second type of discharge capacitor is further included, wherein a first end of the second type of discharge capacitor is electrically connected to the power output end, and a second end of the second type of discharge capacitor is electrically connected to the power input end.
[0016] Optionally, the power input terminal is grounded.
[0017] Optionally, it also includes:
[0018] A controller, wherein a first terminal of the controller is electrically connected to the power output terminal, a second terminal of the controller is electrically connected to the power input terminal, and an output terminal of the controller is electrically connected to a control terminal of the transistor group;
[0019] A third type of discharge capacitor is also included, a first end of the third type of discharge capacitor is electrically connected to the output end of the controller, and a second end of the third type of discharge capacitor is electrically connected to the power input end.
[0020] According to another aspect of the utility model, a car water circulation heat dissipation system is provided, comprising a motor and the control panel as described above.
[0021] Optionally, a metal cover plate is further included, and the control panel is arranged opposite to the metal cover plate.
[0022] The control board and automobile water circulation and heat dissipation system provided by the embodiment of the utility model, the first end of the crystal is electrically connected to the power output end, the second end of the transistor group is electrically connected to the motor, the current flows out from the power output end and is transmitted to the transistor group, the transistor group generates alternating current, and drives the motor to work. The first end of the first type of discharge capacitor is electrically connected to the third end of the transistor group, and the second end of the first type of discharge capacitor is electrically connected to the power input end. The first type of discharge capacitor is arranged between the transistor group and the motor, and a part of the voltage transmitted to the transistor group is diverted to prevent the transistor group from being unable to withstand excessive voltage and affecting the normal operation of the control board. The first type of discharge capacitor is arranged in the control board, which has a simple structure, reduces the situation where the control board is damaged due to excessive voltage, and can work normally under voltage environments of different intensities. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 A schematic diagram of the structure of a first control panel provided in an embodiment of the utility model;
[0024] Figure 2 A schematic diagram of the structure of a second control panel provided by an embodiment of the utility model;
[0025] Figure 3 A schematic diagram of the structure of a third control panel provided by an embodiment of the utility model;
[0026] Figure 4 A schematic structural diagram of a fourth control panel provided in an embodiment of the utility model. DETAILED DESCRIPTION
[0027] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0028] Figure 1 The schematic diagram of the structure of the first control panel provided by the embodiment of the utility model is shown in FIG. Figure 1 The control board includes a power supply 10, a transistor group 20 and a first type of discharge capacitor 30. The power supply 10 includes a power input terminal and a power output terminal; at least one transistor group 20, a first end of the transistor group 20 is electrically connected to the power output terminal, a second end of the transistor group 20 is electrically connected to the power input terminal, and a third end of the transistor group 20 is electrically connected to the motor 40; at least one first type of discharge capacitor 30, a first end of the first type of discharge capacitor 30 is electrically connected to the third end of the transistor group 20, and a second end of the first type of discharge capacitor 30 is electrically connected to the power input terminal.
[0029] Exemplarily, the power input end is the end where positive charge flows in, i.e., the negative pole of the power supply, and the power output end is the end where positive charge flows out, i.e., the positive pole of the power supply. The first end of the transistor group 20 is electrically connected to the power output end, and the second end of the transistor group 20 is electrically connected to the motor 40. The current flows out from the power output end and is transmitted to the transistor group 20. The transistor group 20 generates alternating current, and the magnets alternately rotate to generate a certain speed, which drives the motor 40 to work.
[0030] Exemplarily, the first end of the first type of discharge capacitor 30 is electrically connected to the third end of the transistor group 20, and the second end of the first type of discharge capacitor 30 is electrically connected to the power input terminal. The discharge capacitor is a circuit element that utilizes the charge and discharge characteristics of the capacitor to release excess electrical energy and ensure the stability of the output voltage of the control board. The first type of discharge capacitor 30 is arranged between the transistor group 20 and the motor 40 to shunt a portion of the voltage transmitted to the transistor group 20 to prevent the transistor group 20 from being unable to withstand excessive voltage and affecting the normal operation of the control board.
[0031] As an example, the control board is provided with a transistor group 20 and a first type of discharge capacitor 30. In other implementations, multiple transistor groups 20 and multiple first type of discharge capacitors 30 may be provided, and the embodiment of the utility model does not impose specific limitations on this.
[0032] In the control board provided by the embodiment of the utility model, the first end of the transistor group 20 is electrically connected to the power output end, the second end of the transistor group 20 is electrically connected to the motor 40, the current flows out from the power output end and is transmitted to the transistor group 20, the transistor group 20 generates alternating current, and drives the motor 40 to work. The first end of the first type of discharge capacitor 30 is electrically connected to the third end of the transistor group 20, and the second end of the first type of discharge capacitor 30 is electrically connected to the power input end. The first type of discharge capacitor 30 is arranged between the transistor group 20 and the motor 40, and a part of the voltage transmitted to the transistor group 20 is diverted to prevent the transistor group 20 from being unable to withstand excessive voltage and affecting the normal operation of the control board. The first type of discharge capacitor is arranged in the control board, which has a simple structure, reduces the situation where the control board is damaged due to excessive voltage, and can work normally under voltage environments of different intensities.
[0033] Figure 2 The schematic diagram of the structure of the second control panel provided by the embodiment of the utility model is shown in FIG. Figure 2The transistor group 20 includes a first transistor 211 and a second transistor 212. The collector of the first transistor 211 is electrically connected to the power output terminal, the emitter of the first transistor 211 is electrically connected to the collector of the second transistor 212, the emitter of the first transistor 211 is electrically connected to the motor 40, and the emitter of the second transistor 212 is electrically connected to the power input terminal. The first transistor 211 and the second transistor 212 are not turned on at the same time. By controlling the first transistor 211 and the second transistor 212 to be turned on alternately, a constantly changing current is formed to form an alternating current, which is transmitted to the motor 40 to drive the motor 40 to work. The types of the first transistor 211 and the second transistor 212 can be set according to actual needs, and the embodiment of the utility model does not make specific restrictions on this.
[0034] Exemplarily, the control board also includes a metal foil 50, which is arranged at the bottom of at least one transistor group 20 and is electrically connected to the collector of the first transistor 211 and / or the collector of the second transistor 212. The metal foil 50 has good electrical conductivity. The metal foil 50 is arranged at the bottom of the transistor group 20 to improve the electrical conductivity and stability of the control board. The metal foil 50 has good corrosion resistance and protects the control board from oxidation or corrosion. At the same time, the metal foil 50 has good thermal conductivity, which helps to dissipate the large amount of heat generated by the transistor group 20 on the control board during operation, thereby avoiding high temperature damage to the control board. As an example, the metal foil 50 can be a copper foil, and the type and area of the metal foil 50 can be set according to actual needs, and the embodiment of the utility model does not impose specific restrictions on this.
[0035] Exemplarily, the capacitance of the first type of discharge capacitor 30 is 47nF-100nF.
[0036] Exemplarily, the control board includes three transistor groups 20, namely the first transistor group 21, the second transistor group 22 and the third transistor group 23, and the control board includes three first-class discharge capacitors 30, namely the first discharge capacitor 31, the second discharge capacitor 32 and the third discharge capacitor 33. Among them, the third end of the first transistor group 21 and the first end of the first discharge capacitor 31 are electrically connected to the first end of the motor 40, the third end of the second transistor group 22 and the first end of the second discharge capacitor 32 are electrically connected to the second end of the motor 40, and the third end of the third transistor group 23 and the first end of the third discharge capacitor 33 are electrically connected to the third end of the motor 40. The first transistor group 21, the second transistor group 22 and the third transistor group 23 generate three three-phase AC circuits with the same frequency, equal potential amplitude and 120° phase difference. The current and voltage of the three phases change periodically and balance each other, reducing power fluctuations, making the transmission more stable, and at the same time, the power transmission efficiency is higher, which can better meet the working voltage of the motor.
[0037] For example, when the control board is subjected to an air discharge test, the discharge device accumulates 25kv of charge and injects it into the control board through the air. Since there is a metal foil 50 at the bottom of the transistor group 20, and the metal cover plate is arranged opposite to the control board, the distance between the metal cover plate and the metal foil 50 is very close. When a large amount of charge is injected, a distributed capacitance is generated between the metal foil 50 and the metal cover plate. The capacitance of the distributed capacitance is large, and the impedance of the distributed capacitance is small according to the relationship between capacitance and impedance. Since the current is conducted along a path with a small impedance, a large amount of charge is injected into the position of the metal foil 50, that is, along the path between the transistor group 20 and the motor 40. At this time, the transistor group 20 cannot withstand the large voltage injected, the control board is damaged, and the motor 40 cannot work normally. Therefore, a first type of discharge capacitor 30 is set between the transistor group 20 and the motor 40 for shunting to ensure the normal operation of the motor.
[0038] Among them, a first discharge capacitor 31 is set between the first transistor group 21 and the motor 40, a second discharge capacitor 32 is set between the second transistor group 22 and the motor 40, and a third discharge capacitor 33 is set between the third transistor group 23 and the motor 40. When the voltage is randomly injected into the circuit, it is ensured that each line is protected by the first type of discharge capacitor 30 and will not be damaged because the transistor cannot withstand the voltage.
[0039] Figure 3 The schematic diagram of the structure of the third control panel provided by the embodiment of the utility model is shown in FIG. Figure 3 The control board also includes a second type of discharge capacitor 60, a first end of the second type of discharge capacitor 60 is electrically connected to the power output end, and a second end of the second type of discharge capacitor 60 is electrically connected to the power input end. The second type of discharge capacitor 60 is added between the power input end and the power output end to protect the power supply 10 and ensure the normal operation of the power supply 10.
[0040] Exemplarily, the power input terminal is grounded, and the electric energy of the discharge capacitor is released to the ground, thereby ensuring the stability of the output voltage of the control board.
[0041] Figure 4 The schematic diagram of the structure of the fourth control panel provided by the embodiment of the utility model is shown in FIG. Figure 4 The control board further includes a controller 70 and a third type of discharge capacitor 80. The first end of the controller 70 is electrically connected to the power output end, the second end of the controller 70 is electrically connected to the power input end, the output end of the controller 70 is electrically connected to the control end of the transistor group 20, the first end of the third type of discharge capacitor 80 is electrically connected to the output end of the controller 70, and the second end of the third type of discharge capacitor 80 is electrically connected to the power input end.
[0042] Exemplarily, the output end of the controller 70 is electrically connected to the control end of the transistor group 20, and the controller 70 is used to control the switch of the transistor group 20. The controller 70 includes a buck regulator 71, a control unit 72 and a drive circuit 73. Since the working voltage of the controller 70 is lower than the voltage provided by the power supply 10, it is necessary to set the buck regulator 71 to step down and stabilize the working voltage transmitted to the controller 70 to ensure that the controller 70 can work at a suitable working voltage. The drive circuit 73 is electrically connected to the control end of the transistor group 20, and is used to monitor the working condition of the transistor group 20. When the transistor group 20 is short-circuited, open-circuited, etc., the working condition of the transistor group is transmitted to the control unit 72, and the control unit controls the switch of the transistor group 20. When an abnormal situation occurs in the transistor group 20, the control board is stopped in time.
[0043] Exemplarily, a first end of the third type of discharge capacitor 80 is electrically connected to the output end of the controller 70, a second end of the third type of discharge capacitor 80 is electrically connected to the power input end, and the third type of discharge capacitor 80 is arranged between the controller 70 and the transistor group 20 to protect the controller 70 and ensure the normal operation of the controller 70.
[0044] The following is an example of a four-level discharge test on the control board to illustrate the effect of the solution provided by the utility model by testing the working condition of the control board. The test data is as follows:
[0045] Strength level Contact discharge Air discharge L1 ±4kv ±6kv L2 ±6kv ±8kv L3 ±8kv ±15kv L4 not applicable ±25kv
[0046] Among them, according to the discharge test of four intensity levels on the control board, the control board can work normally under the protection of the discharge capacitor.
[0047] The following takes three discharge tests on the control board as an example to illustrate the effect of the solution provided by the utility model by testing the working condition of the control board. The test data is as follows:
[0048]
[0049] Among them, according to three discharge tests on the control board, the control board can work normally under the protection of the discharge capacitor.
[0050] Based on the same technical concept, the embodiment of the utility model also provides a car water circulation cooling system, which includes the control panel provided in any one of the embodiments of the utility model. Exemplarily, the car water circulation cooling system also includes a metal cover plate, which is arranged opposite to the control panel. Therefore, the car water circulation cooling system provided by the embodiment of the utility model has the corresponding beneficial effects of the control panel provided by the embodiment of the utility model, which will not be repeated here.
[0051] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims
1. A control board for controlling a motor, characterized in that: include: A power supply, including a power input terminal and a power output terminal; at least one transistor group, a first end of the transistor group is electrically connected to the power output end, a second end of the transistor group is electrically connected to the power input end, and a third end of the transistor group is electrically connected to the motor; At least one first type of discharge capacitor, wherein a first end of the first type of discharge capacitor is electrically connected to the third end of the transistor group, and a second end of the first type of discharge capacitor is electrically connected to the power input end.
2. The control panel according to claim 1, characterized in that: The transistor group includes a first transistor and a second transistor, the collector of the first transistor is electrically connected to the power output terminal, the emitter of the first transistor is electrically connected to the collector of the second transistor, the emitter of the first transistor is electrically connected to the motor, and the emitter of the second transistor is electrically connected to the power input terminal.
3. The control panel according to claim 2, characterized in that: The device further comprises a metal foil, wherein the metal foil is arranged at the bottom of the at least one transistor group and is electrically connected to the collector of the first transistor and / or the collector of the second transistor.
4. The control panel according to claim 1, characterized in that: The capacitance of the first type of discharge capacitor is 47nF-100nF.
5. The control panel according to claim 1, characterized in that: The invention comprises three transistor groups, namely a first transistor group, a second transistor group and a third transistor group; The control board includes three first-type discharge capacitors, namely a first discharge capacitor, a second discharge capacitor and a third discharge capacitor; The third end of the first transistor group and the first end of the first discharge capacitor are electrically connected to the first end of the motor, the third end of the second transistor group and the first end of the second discharge capacitor are electrically connected to the second end of the motor, and the third end of the third transistor group and the first end of the third discharge capacitor are electrically connected to the third end of the motor.
6. The control panel according to claim 1, characterized in that: It also includes a second type of discharge capacitor, a first end of the second type of discharge capacitor is electrically connected to the power output end, and a second end of the second type of discharge capacitor is electrically connected to the power input end.
7. The control panel according to claim 1, characterized in that: The power input terminal is grounded.
8. The control panel according to claim 1, characterized in that: Also includes: A controller, wherein a first terminal of the controller is electrically connected to the power output terminal, a second terminal of the controller is electrically connected to the power input terminal, and an output terminal of the controller is electrically connected to a control terminal of the transistor group; A third type of discharge capacitor is also included, a first end of the third type of discharge capacitor is electrically connected to the output end of the controller, and a second end of the third type of discharge capacitor is electrically connected to the power input end.
9. A water circulation cooling system for automobiles, characterized in that: It comprises a motor and a control board as claimed in any one of claims 1 to 8.
10. The automobile water circulation cooling system according to claim 9, characterized in that: It also includes a metal cover plate, and the control panel is arranged opposite to the metal cover plate.