CN219875475U - Power supply anti-reverse circuit applied to automobile motor control - Google Patents
Power supply anti-reverse circuit applied to automobile motor control Download PDFInfo
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- CN219875475U CN219875475U CN202320667659.7U CN202320667659U CN219875475U CN 219875475 U CN219875475 U CN 219875475U CN 202320667659 U CN202320667659 U CN 202320667659U CN 219875475 U CN219875475 U CN 219875475U
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- nmos transistor
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- power supply
- motor control
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- 239000003990 capacitor Substances 0.000 claims abstract description 39
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 13
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of steering systems, in particular to a power supply anti-reflection circuit applied to automobile motor control. A power supply anti-reverse circuit applied to automobile motor control is characterized in that: the positive electrode of the power supply is respectively connected with one end of the first capacitor and one end of the second capacitor, one end of the resistor, the positive electrode of the third capacitor and one end of the load; the negative electrode of the power supply is respectively connected with the other ends of the first capacitor and the second capacitor and the drain electrode of the NMOS transistor, and the source electrode of the NMOS transistor is respectively connected with the anode of the zener diode, the negative electrode of the third capacitor and the other end of the load and then grounded; the other end of the resistor is respectively connected with the grid electrode of the NMOS transistor and the cathode of the voltage stabilizing diode. Compared with the prior art, the positive electrode of the power supply enters the grid electrode of the NMOS transistor through the resistor, the drain electrode of the NMOS transistor is connected with the negative electrode end of the power supply, the source electrode of the NMOS transistor is connected with the internal power ground of the board, and the voltage stabilizing diode is bridged between the grid electrode and the source electrode of the NMOS transistor to play a role in stabilizing the GS voltage, so that the MOS transistor is protected.
Description
Technical Field
The utility model relates to the technical field of steering systems, in particular to a power supply anti-reflection circuit applied to automobile motor control.
Background
With the rapid development of electric vehicles, higher requirements are put on the design reliability and safety of the electric vehicles. The positive and negative poles of the motor controller are reversely connected, so that the motor controller is easy to generate in the assembly process, and the controller is damaged. Therefore, the problem needs to be avoided from the design end, the reverse connection preventing protection function is introduced, most of the existing reverse connection preventing circuits adopt a diode to be connected in series at the positive end of the power supply of the controller, and the heat damage and even burning are extremely easy to cause due to the fact that the internal resistance of the diode is relatively high and large current is introduced for a long time. The PMOS tube is connected in series to the positive end of the power supply, so that the problem of burning out can be avoided, but the PMOS tube has higher cost and brings cost pressure to OEM (equipment manufacturer).
Therefore, based on the current situation, it is proposed to add an NMOS transistor to the negative electrode of the power supply to realize the function of preventing reverse connection, so as to avoid the problems of burning and high cost.
Disclosure of Invention
The utility model provides a power supply anti-reflection circuit applied to automobile motor control, which aims to overcome the defects in the prior art, wherein the positive electrode of a power supply enters the grid electrode of an NMOS transistor through a resistor, the drain electrode of the NMOS transistor is connected with the negative electrode of the power supply, the source electrode of the NMOS transistor is connected with the internal power ground of a board, and a voltage stabilizing diode is bridged between the grid electrode and the source electrode of the NMOS transistor to play a role in stabilizing GS voltage, so that an MOS transistor is protected.
In order to achieve the above purpose, a power anti-reflection circuit for controlling an automobile motor is designed, which comprises a power supply, a resistor, an NMOS transistor and a voltage stabilizing diode, and is characterized in that: the positive electrode of the power supply is respectively connected with one end of the first capacitor and one end of the second capacitor, one end of the resistor, the positive electrode of the third capacitor and one end of the load; the negative electrode of the power supply is respectively connected with the other ends of the first capacitor and the second capacitor and the drain electrode of the NMOS transistor, and the source electrode of the NMOS transistor is respectively connected with the anode of the zener diode, the negative electrode of the third capacitor and the other end of the load and then grounded; the other end of the resistor is respectively connected with the grid electrode of the NMOS transistor and the cathode of the voltage stabilizing diode.
The third capacitor is a polar capacitor.
The model of the capacitor I is CL32Y226KAVVPNC, the model of the capacitor II is CGA5L3X7R1H225KT0Y0N, and the model of the capacitor III is HHXC250ARA331MJA0G.
The model of the NMOS transistor is PWDC008N04ESQ.
The model of the resistor is MCR03EZPFX3002.
The model of the voltage stabilizing diode is BZX84J-C15.
The load is a motor.
Compared with the prior art, the utility model provides the power supply anti-reflection circuit applied to the control of the automobile motor, the positive electrode of the power supply enters the grid electrode of the NMOS transistor through the resistor, the drain electrode of the NMOS transistor is connected with the negative electrode end of the power supply, the source electrode of the NMOS transistor is connected with the internal power ground of the panel, and the voltage stabilizing diode is bridged between the grid electrode and the source electrode of the NMOS transistor to play a role in stabilizing the GS voltage, so that the MOS transistor is protected.
The utility model can play a role in circuit anti-reaction, not only overcomes the defect that the voltage-stabilizing diode is extremely easy to burn, but also avoids the problems of using a PMOS tube and increasing the cost, and is better suitable for the development of high-quality and high-reliability electric automobiles.
Drawings
Fig. 1 is a schematic diagram of a circuit connection according to the present utility model.
Description of the embodiments
The utility model is further described below with reference to the accompanying drawings.
As shown in fig. 1, the positive electrode KL30 of the power supply is respectively connected with one end of a first capacitor C201 and a second capacitor C202, one end of a resistor R201, the positive electrode of a third capacitor C203 and one end of a load; the negative electrode KL31 of the power supply is respectively connected with the other ends of the first capacitor C201 and the second capacitor C202 and the drain electrode of the NMOS transistor Q201, and the source electrode of the NMOS transistor Q201 is respectively connected with the anode of the zener diode D201, the negative electrode of the third capacitor C203 and the other end of the load and then grounded; the other end of the resistor R201 is respectively connected with the grid electrode of the NMOS transistor Q201 and the cathode of the zener diode D201.
The capacitor tri-C203 is a polar capacitor.
The model of the capacitor one C201 is CL32Y226KAVVPNC, the model of the capacitor two C202 is CGA5L3X7R1H225KT0Y0N, and the model of the capacitor three C203 is HHXC250ARA331MJA0G.
The model of the NMOS transistor Q201 is PWDC008N04ESQ.
Resistor R201 is model MCR03EZPFX3002.
The zener diode D201 is model BZX84J-C15.
The load is a motor.
The positive pole KL30 of the power enters the grid electrode of the NMOS transistor Q201 through the resistor R201, the drain electrode of the NMOS transistor Q201 is connected with the negative pole KL31 of the power source, the source electrode of the NMOS transistor Q201 is connected with the internal power ground of the board, namely the reference ground plane of the load, and the voltage stabilizing diode D201 is connected between the grid electrode and the source electrode of the NMOS transistor Q201 in a bridging mode to play a role in stabilizing GS voltage, so that the MOS transistor is protected.
Claims (7)
1. The utility model provides a be applied to car motor control's power anti-reverse circuit, includes power, resistance, NMOS transistor, zener diode, its characterized in that: the positive electrode (KL 30) of the power supply is respectively connected with one end of a first capacitor (C201) and a second capacitor (C202), one end of a resistor (R201), the positive electrode of a third capacitor (C203) and one end of a load; the negative electrode (KL 31) of the power supply is respectively connected with the other ends of a capacitor I (C201) and a capacitor II (C202) and the drain electrode of an NMOS transistor (Q201), and the source electrode of the NMOS transistor (Q201) is respectively connected with the anode of a zener diode (D201), the negative electrode of a capacitor III (C203) and the other end of a load and then grounded; the other end of the resistor (R201) is respectively connected with the grid electrode of the NMOS transistor (Q201) and the cathode of the zener diode (D201).
2. A power anti-reflection circuit applied to motor control of an automobile according to claim 1, wherein: the capacitor III (C203) is a polar capacitor.
3. A power anti-reflection circuit applied to motor control of an automobile according to claim 1, wherein: the model of the capacitor I (C201) is CL32Y226KAVVPNC, the model of the capacitor II (C202) is CGA5L3X7R1H225KT0Y0N, and the model of the capacitor III (C203) is HHXC250ARA331MJA0G.
4. A power anti-reflection circuit applied to motor control of an automobile according to claim 1, wherein: the model of the NMOS transistor (Q201) is PWDC008N04ESQ.
5. A power anti-reflection circuit applied to motor control of an automobile according to claim 1, wherein: the model of the resistor (R201) is MCR03EZPFX3002.
6. A power anti-reflection circuit applied to motor control of an automobile according to claim 1, wherein: the model of the voltage stabilizing diode (D201) is BZX84J-C15.
7. A power anti-reflection circuit applied to motor control of an automobile according to claim 1, wherein: the load is a motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320667659.7U CN219875475U (en) | 2023-03-30 | 2023-03-30 | Power supply anti-reverse circuit applied to automobile motor control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320667659.7U CN219875475U (en) | 2023-03-30 | 2023-03-30 | Power supply anti-reverse circuit applied to automobile motor control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219875475U true CN219875475U (en) | 2023-10-20 |
Family
ID=88369507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320667659.7U Active CN219875475U (en) | 2023-03-30 | 2023-03-30 | Power supply anti-reverse circuit applied to automobile motor control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219875475U (en) |
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2023
- 2023-03-30 CN CN202320667659.7U patent/CN219875475U/en active Active
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