Soft start anti-burning circuit

Abstract

The utility model relates to a soft start anti-burning circuit, which is applied to the field of overheating protection, and comprises a power supply module used for obtaining a power supply voltage ACL and outputting 12V and 5V voltages; the driving circuit module is connected to the power supply module and is used for receiving the starting trigger signal TG and the control signal; the anti-burning protection module is connected to the power supply module and the driving circuit module and is used for receiving the protection trigger signal RL and sending a control signal to the driving circuit module; the zero-cross detection module is connected to the power supply module and is used for carrying out zero-cross detection on the obtained power supply voltage ACL and outputting a zero-cross pulse signal ZCP; and the signal processing module is used for receiving the zero-crossing pulse signal ZCP and outputting a starting trigger signal TG and a protection trigger signal RL. The soft start circuit has the technical effects that the power device is short-circuited after soft start is finished, and the problem that the power device is prone to failure due to serious heating is solved.

Description

Technical Field

[0001] The present application relates to the technical field of overheat protection, and in particular to a soft start anti-burn circuit. Background Art

[0002] If high-power equipment such as miter saws and cutting machines are started directly, the voltage applied will directly rise from 0V to 220V. The instantaneous application of high voltage will cause the equipment to shake violently, which may cause damage to the equipment. At present, technicians usually use power devices to use soft start to avoid problems caused by direct start of equipment.

[0003] However, when the power device is soft-started, when the equipment is always in working state, the power device will also be in working state all the time, which may cause the power device to heat up seriously. The long-term heating of the power device may cause the device to fail, thereby reducing the service life of the product. Summary of the invention

[0004] In order to help solve the problem that severe heating of power devices may cause device failure and reduce the service life of the product, the present application provides a soft start anti-burn circuit, which adopts the following technical solutions: including:

[0005] A power supply module, the power supply module is used to obtain a power supply voltage ACL and output a 12V working voltage and a 5V VCC;

[0006] A driving circuit module, the driving circuit module is connected to the power supply module and is used to receive a start trigger signal TG and a control signal;

[0007] When the driving circuit module receives the start trigger signal TG, the driving circuit module is started to soft-start the device;

[0008] When the drive circuit module receives the control signal, the drive circuit module is short-circuited; an anti-burn protection module, the anti-burn protection module is connected to the power supply module and the drive circuit module, and is used to receive a protection trigger signal RL, and send a control signal to the drive circuit module at the end of the soft start of the device to control the on and off of the drive circuit module;

[0009] A zero-crossing detection module, the zero-crossing detection module is connected to the power supply module, and is used to perform zero-crossing detection on the acquired power supply voltage ACL and output a zero-crossing pulse signal ZCP;

[0010] A signal processing module, wherein the signal processing module is connected to the power supply module, the drive circuit module, the anti-burn protection module and the zero-crossing detection module, and is used to receive the zero-crossing pulse signal ZCP and output the start trigger signal TG and the protection trigger signal RL.

[0011] Through the above technical solution, high-power machines or equipment are generally powered by AC power, and the power supply module converts the AC power into the 12V voltage and 5V voltage required for operation to ensure the normal operation of the circuit. During the soft start process of the equipment, the power device in the drive circuit module is used to realize the soft start of the equipment, and the on and off of the drive circuit is controlled by the anti-burn protection module, so that after the soft start is completed, the power device does not participate in the operation of the equipment in actual use, thereby solving the problem of severe heat and easy failure of the power device, and thus extending the service life of the product.

[0012] In a specific implementation scheme, the power supply module includes:

[0013] A first power supply module, the first power supply module is used to obtain the power supply voltage ACL and output the 12V working voltage;

[0014] The second power supply module is used to obtain the 12V working voltage and output the 5V VCC.

[0015] Through the above technical solution, the input 220V AC power can be stepped down to output the working voltage required by each circuit module. High-power equipment or machines need to be powered by 220V AC power, but the circuit working voltage is much lower than 220V, so it needs to be stepped down to 12V or 5V to ensure the normal operation of chips and other devices.

[0016] In a specific implementation scheme, the first power supply module includes:

[0017] FireWire interface AC-L;

[0018] A resistor R2, one end of which is connected to the live wire interface AC-L to obtain the power supply voltage ACL;

[0019] A voltage regulator tube D11, wherein the anode of the voltage regulator tube D11 is connected to the other end of the resistor R2;

[0020] A voltage regulator tube D1, wherein the anode of the voltage regulator tube D1 is connected to the cathode of the voltage regulator tube D11;

[0021] An inductor L1 and a resistor R3 connected in parallel, wherein a connection point between the inductor L1 and the resistor R3 is connected to the cathode of the voltage regulator tube D1;

[0022] A polar capacitor C1, wherein a positive electrode of the polar capacitor C1 is connected to a connection point between the inductor L1 and the resistor R3, and a negative electrode of the polar capacitor C1 is grounded;

[0023] a polar capacitor C2, wherein a positive electrode of the polar capacitor C2 is connected to another connection point of the inductor L1 and the resistor R3, and a negative electrode of the polar capacitor C2 is grounded;

[0024] A power management chip U1, wherein pins 5, 6, 7 and 8 of the power management chip U1 are connected, the connection points of pins 5, 6, 7 and 8 of the power management chip U1 are connected to another connection point of the inductor L1 and the resistor R3, pins 1 and 2 of the power management chip U1 are connected, and the model of the power management chip U1 is OB2235NCP-H;

[0025] A voltage regulator tube D3, wherein the anode of the voltage regulator tube D3 is grounded, and the cathode of the voltage regulator tube D3 is connected to the connection point between pin 1 and pin 2 of the power management chip U1;

[0026] A polar capacitor C3, wherein the positive electrode of the polar capacitor C3 is connected to the pin 4 of the power management chip U1, and the negative electrode of the polar capacitor C3 is connected to the cathode of the voltage regulator tube D3;

[0027] A voltage regulator tube D4, wherein the cathode of the voltage regulator tube D4 is connected to the pin 4 of the power management chip U1, and the anode of the voltage regulator tube D4 outputs the 12V working voltage;

[0028] An inductor L2, one end of which is connected to the connection point between the polar capacitor C3 and the voltage regulator tube D3, and the other end of which is connected to the anode of the voltage regulator tube D4;

[0029] A polarity capacitor C4, wherein the positive electrode of the polarity capacitor C4 is connected to the connection point of the voltage regulator tube D4 and the inductor L2, and the negative electrode of the polarity capacitor C4 is grounded.

[0030] In a specific implementation scheme, the second power supply module includes:

[0031] A resistor R4 and a resistor R5 connected in series, the other end of the resistor R4 is grounded, and a connection point between the resistor R4 and the resistor R5 receives the 12V working voltage;

[0032] A voltage stabilizing chip U2, wherein the pin 2 of the voltage stabilizing chip U2 is connected to the other end of the resistor R5, the pin 1 of the voltage stabilizing chip U2 is grounded, the pin 3 of the voltage stabilizing chip U2 outputs the 5V VCC, and the model of the voltage stabilizing chip U2 is MX7550-SOT89;

[0033] Capacitor C5, one end of the capacitor C5 is connected to pin 2 of the voltage stabilizing chip U2, and the other end of the capacitor C5 is grounded;

[0034] Capacitor C9, one end of the capacitor C9 is connected to pin 3 of the voltage stabilizing chip U2, and the other end of the capacitor C9 is grounded;

[0035] Capacitor C7, one end of the capacitor C7 is connected to pin 3 of the voltage stabilizing chip U2, and the other end of the capacitor C7 is grounded.

[0036] In a specific implementation scheme, the driving circuit module includes:

[0037] A neutral line interface AC-N, wherein the neutral line interface AC-N is grounded;

[0038] The first motor interface AC-N1 and the second motor interface AC-N2;

[0039] A resistor R28 and a resistor R25 connected in series, the other end of the resistor R28 receiving the start trigger signal TG, and the other end of the resistor R25 being grounded;

[0040] NPN transistor Q4, with its base connected to the connection point of the resistor R25 and the resistor R28, its emitter grounded, and its collector connected to the 12V working voltage through the resistor R24;

[0041] A resistor R23 and a capacitor C13 connected in series, the other end of the capacitor C13 being connected to the collector of the NPN transistor Q4;

[0042] Thyristor Q5, pin 1 of the thyristor Q5 is connected to the first motor interface AC-N1, pin 2 of the thyristor Q5 is connected to the second motor interface AC-N2, and pin 3 of the thyristor Q5 is connected to the other end of the resistor R23;

[0043] Pin 1 and pin 2 of the thyristor Q5 receive the control signal.

[0044] In a specific embodiment, the anti-burn protection module includes:

[0045] A resistor R20 and a resistor R13 are connected in series, the other end of the resistor R13 receives the protection trigger signal RL, and the other end of the resistor R20 is grounded;

[0046] An NPN transistor Q1, whose base is connected to the connection point of the resistor R20 and the resistor R13, and whose emitter is grounded;

[0047] Relay RL1, pin 3 of the relay RL1 is connected to the collector of the NPN transistor Q1, pin 1 of the relay RL1 is connected to the 12V working voltage, pin 2 of the relay RL1 is connected to pin 1 of the thyristor, and pin 4 of the relay RL1 is connected to pin 2 of the thyristor;

[0048] When the pin 2 and the pin 4 of the relay RL1 are connected, the control signal is sent to the driving circuit module;

[0049] A voltage regulator tube D5, wherein a cathode of the voltage regulator tube D5 is connected to pin 1 of the relay RL1, and an anode of the voltage regulator tube D5 is connected to pin 3 of the relay RL1.

[0050] In a specific implementation scheme, the model of the relay RL1 is JQC-3FF.

[0051] In a specific implementation scheme, the zero-crossing detection module includes:

[0052] A resistor R18 and a resistor R19 connected in series, the other end of the resistor R18 obtains the power supply voltage ACL, and the other end of the resistor R19 outputs the zero-crossing pulse signal ZCP;

[0053] Capacitor C16, one end of the capacitor C16 is connected to the other end of the resistor R19, and the other end of the capacitor C16 is grounded.

[0054] In a specific implementation scheme, the signal processing module is a control chip U3;

[0055] Pin 1 of the control chip U3 is grounded, pin 16 of the control chip U3 is connected to the 5V VCC, pin 13 of the control chip U3 outputs the protection trigger signal RL, pin 14 of the control chip U3 outputs the start trigger signal TG, and pin 15 of the control chip U3 receives the zero-crossing pulse signal ZCP;

[0056] Capacitor C8, one end of the capacitor C8 is connected to the ground of pin 1 of the control chip U3, and the other end of the capacitor C8 is connected to the 5V VCC of pin 16 of the control chip U3.

[0057] In a specific implementation scheme, the model of the control chip U3 is HHMF018-SOP16.

[0058] In summary, this application has the following beneficial technical effects:

[0059] High-power machines or equipment are generally powered by AC power. The power supply module converts the AC power into the 12V and 5V voltages required for operation to ensure the normal operation of the circuit. During the soft start process of the equipment, the power devices in the drive circuit module are used to achieve the soft start of the equipment. The on and off of the drive circuit is controlled by the anti-burn protection module, so that after the soft start is completed, the power devices do not participate in the operation of the equipment in actual use, thereby solving the problem of severe heat and easy failure of the power devices, and thus extending the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 Schematic diagram of the framework of the soft start anti-burn circuit in the embodiment of the present application;

[0061] Figure 2 is a circuit diagram of a power supply module in an embodiment of the present application;

[0062] Figure 3 is a circuit diagram of a driving circuit module and an anti-burn protection module in an embodiment of the present application;

[0063] Figure 4 is a circuit diagram of a zero-crossing detection module in an embodiment of the present application;

[0064] Figure 5 It is a circuit diagram of the signal processing module in the embodiment of the present application.

[0065] Reference numerals: 100, power supply module; 200, drive circuit module; 300, anti-burn protection module; 400, zero-crossing detection module; 500, signal processing module. DETAILED DESCRIPTION

[0066] The following is combined with Figure 1-5 This application is described in further detail.

[0067] The embodiment of the present application discloses a soft-start anti-burn circuit. After the soft start of a high-power device is completed, the soft-start anti-burn circuit will short-circuit the power device that implements the soft start, so that the power device does not participate in the actual work. This can solve the problem that the controllers of high-power devices such as miter saws and cutting machines are prone to serious heat and cause failure, and avoid the power devices used for soft start of the equipment from heating up and being burned as much as possible, thereby extending the service life of the product.

[0068] Reference Figure 1 , the soft start anti-burn circuit includes:

[0069] The power supply module 100 is used to obtain the power supply voltage ACL and output a 12V working voltage and a 5V VCC. The power supply module includes: a first power supply module, the first power supply module is used to obtain the power supply voltage ACL and output a 12V working voltage; a second power supply module, the second power supply module is used to obtain a 12V working voltage and output a 5V VCC.

[0070] The driving circuit module 200 is connected to the power supply module 100 and is used to receive the start trigger signal TG and the control signal; when the driving circuit module 200 receives the start trigger signal TG, the driving circuit module 200 is started to soft-start the device; when the driving circuit module 200 receives the control signal, the driving circuit module 200 is short-circuited; the anti-burn protection module 300 is connected to the power supply module 100 and the driving circuit module 200, and is used to receive the protection trigger signal RL, and when the soft start of the device is completed, A control signal is sent to the driving circuit module 200 to control the on and off of the driving circuit module 200; a zero-crossing detection module 400, which is connected to the power supply module 100, is used to perform zero-crossing detection on the acquired power supply voltage ACL and output a zero-crossing pulse signal ZCP; a signal processing module 500, which is connected to the power supply module 100, the driving circuit module 200, the anti-burn protection module 300 and the zero-crossing detection module 400, is used to receive the zero-crossing pulse signal ZCP and output a start trigger signal TG and a protection trigger signal RL.

[0071] In the present application, high-power machines or equipment are generally powered by AC power, and the power supply module converts the AC power into the 12V voltage and 5V voltage required for operation to ensure the normal operation of the circuit. During the soft start process of the equipment, the power device in the drive circuit module is used to realize the soft start of the equipment, and the on and off of the drive circuit is controlled by the anti-burn protection module, so that after the soft start is completed, the power device does not participate in the operation of the equipment in actual use, thereby solving the problem of severe heat and easy failure of the power device, and thus extending the service life of the product.

[0072] Reference Figure 2The first power supply module includes: a live wire interface AC-L; a resistor R2, one end of the resistor R2 is connected to the live wire interface AC-L to obtain a power supply voltage ACL; a voltage regulator tube D11, the anode of the voltage regulator tube D11 is connected to the other end of the resistor R2; a voltage regulator tube D1, the anode of the voltage regulator tube D1 is connected to the cathode of the voltage regulator tube D11; an inductor L1 and a resistor R3 connected in parallel, a connection point between the inductor L1 and the resistor R3 is connected to the cathode of the voltage regulator tube D1; a polar capacitor C1, the positive electrode of the polar capacitor C1 is connected to a connection point between the inductor L1 and the resistor R3, and the negative electrode of the polar capacitor C1 is grounded; a polar capacitor C2, the positive electrode of the polar capacitor C2 is connected to another connection point between the inductor L1 and the resistor R3, and the negative electrode of the polar capacitor C2 is grounded; a power management chip U1, pins 5, 6, 7 and 8 of the power management chip U1 are connected, and the connection between pins 5, 6, 7 and 8 of the power management chip U1 A point is connected to another connection point of the inductor L1 and the resistor R3, and pins 1 and 2 of the power management chip U1 are connected. The model of the power management chip U1 is OB2235NCP-H; a voltage regulator D3, the anode of the voltage regulator D3 is grounded, and the cathode of the voltage regulator D3 is connected to the connection point of pins 1 and 2 of the power management chip U1; a polar capacitor C3, the positive electrode of the polar capacitor C3 is connected to pin 4 of the power management chip U1, and the negative electrode of the polar capacitor C3 is connected to the cathode of the voltage regulator D3; a voltage regulator D4, the cathode of the voltage regulator D4 is connected to pin 4 of the power management chip U1, and the anode of the voltage regulator D4 outputs a working voltage of 12V; an inductor L2, one end of the inductor L2 is connected to the connection point of the polar capacitor C3 and the voltage regulator D3, and the other end of the inductor L2 is connected to the anode of the voltage regulator D4; a polar capacitor C4, the positive electrode of the polar capacitor C4 is connected to the connection point of the voltage regulator D4 and the inductor L2, and the negative electrode of the polar capacitor C4 is grounded.

[0073] Reference Figure 2 The second power supply module includes: a resistor R4 and a resistor R5 connected in series, the other end of the resistor R4 is grounded, and the connection point between the resistor R4 and the resistor R5 receives a working voltage of 12V; a voltage stabilizing chip U2, pin 2 of the voltage stabilizing chip U2 is connected to the other end of the resistor R5, pin 1 of the voltage stabilizing chip U2 is grounded, pin 3 of the voltage stabilizing chip U2 outputs 5V VCC, and the model of the voltage stabilizing chip U2 is MX7550-SOT89; a capacitor C5, one end of the capacitor C5 is connected to pin 2 of the voltage stabilizing chip U2, and the other end of the capacitor C5 is grounded; a capacitor C9, one end of the capacitor C9 is connected to pin 3 of the voltage stabilizing chip U2, and the other end of the capacitor C9 is grounded; a capacitor C7, one end of the capacitor C7 is connected to pin 3 of the voltage stabilizing chip U2, and the other end of the capacitor C7 is grounded.

[0074] Reference Figure 3The drive circuit module 200 includes: a neutral line interface AC-N, which is grounded; a first motor interface AC-N1 and a second motor interface AC-N2; a resistor R28 and a resistor R25 connected in series, the other end of the resistor R28 receives a start trigger signal TG, and the other end of the resistor R25 is grounded; an NPN transistor Q4, whose base is connected to the connection point of the resistor R25 and the resistor R28, the emitter is grounded, and the collector is connected to a working voltage of 12V through a resistor R24; a resistor R23 and a capacitor C13 connected in series, the other end of the capacitor C13 is connected to the collector of the NPN transistor Q4; a thyristor Q5, wherein the pin 1 of the thyristor Q5 is connected to the first motor interface AC-N1, the pin 2 of the thyristor Q5 is connected to the second motor interface AC-N2, and the pin 3 of the thyristor Q5 is connected to the other end of the resistor R23; the pin 1 and the pin 2 of the thyristor Q5 receive the control signal.

[0075] Reference Figure 3 The anti-burn protection module 300 includes: a resistor R20 and a resistor R13 connected in series, the other end of the resistor R13 receives a protection trigger signal RL, and the other end of the resistor R20 is grounded; an NPN transistor Q1, the base of which is connected to the connection point of the resistor R20 and the resistor R13, and the emitter is grounded; a relay RL1, the pin 3 of the relay RL1 is connected to the collector of the NPN transistor Q1, the pin 1 of the relay RL1 is connected to the working voltage of 12V, the pin 2 of the relay RL1 is connected to the pin 1 of the thyristor, and the pin 4 of the relay RL1 is connected to the pin 2 of the thyristor; when the pin 2 of the relay RL1 is connected to the pin 4, a control signal is sent to the drive circuit module; a voltage regulator D5, the cathode of the voltage regulator D5 is connected to the pin 1 of the relay RL1, and the anode of the voltage regulator D5 is connected to the pin 3 of the relay RL1; the model of the relay RL1 is JQC-3FF.

[0076] Reference Figure 4 The zero-crossing detection module 400 includes: a resistor R18 and a resistor R19 connected in series, the other end of the resistor R18 obtains the power supply voltage ACL, and the other end of the resistor R19 outputs the zero-crossing pulse signal ZCP; a capacitor C16, one end of the capacitor C16 is connected to the other end of the resistor R19, and the other end of the capacitor C16 is grounded.

[0077] Reference Figure 5The signal processing module 500 is a control chip U3, whose model is HHMF018-SOP16; pin 1 of the control chip U3 is grounded, pin 16 of the control chip U3 is connected to 5V VCC, pin 13 of the control chip U3 outputs a protection trigger signal RL, pin 14 of the control chip U3 outputs a start trigger signal TG, and pin 15 of the control chip U3 receives a zero-crossing pulse signal ZCP; capacitor C8, one end of the capacitor C8 is connected to the ground of pin 1 of the control chip U3, and the other end of the capacitor C8 is connected to the 5V VCC of pin 16 of the control chip U3.

[0078] The implementation principle of the embodiment of the present application is:

[0079] The live AC voltage is input through the live interface for power supply. After the AC voltage is stepped down and filtered, it outputs a 12V working voltage through the power management chip U1. The 12V working voltage can output a 5V VCC after being stepped down by the voltage regulator chip U2, thereby stepping down the original input AC voltage to the working voltage of the chip, relay, etc. to ensure that the circuit can operate normally. The zero-crossing detection circuit is used to detect whether the AC power is zero-crossing. After the AC power crosses the zero point, a trigger signal is sent to control the operation of the drive circuit module and the anti-burn protection module.

[0080] The control chip U3 outputs a start trigger signal TG and outputs a current. The drive circuit receives the start trigger signal TG and receives the current output by the control chip U3. After the current is amplified by the NPN transistor Q4 and limited by the resistor R23 and the capacitor C13, it reaches the working current of the thyristor. The thyristor starts and the drive circuit module starts working. The thyristor is also a power device. The power device works to make the high-power equipment or machine start soft starting, and the voltage slowly rises to the working voltage of the equipment. The control chip U3 outputs a protection trigger signal RL and outputs a current. The anti-burn protection module receives the current, which is amplified by the NPN transistor Q1 and reaches the working current of the relay. During the soft start of the equipment, the relay 2 and 5 feet are closed, and the thyristor can work normally and is not affected. When the soft start of the equipment is over, the relay 2 and 4 feet are closed, and the thyristor in the drive circuit, that is, the power device, is short-circuited, so that the thyristor does not participate in the work in actual use, thereby solving the problem of severe heating caused by the thyristor being in a working state all the time, and thus extending the service life of the product.

[0081] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A soft start anti-burn circuit, characterized in that: include: A power supply module, the power supply module is used to obtain a power supply voltage ACL and output a 12V working voltage and a 5V VCC; A driving circuit module, the driving circuit module is connected to the power supply module and is used to receive a start trigger signal TG and a control signal; When the driving circuit module receives the start trigger signal TG, the driving circuit module is started to soft-start the device; When the driving circuit module receives the control signal, short-circuiting the driving circuit module; An anti-burn protection module, which is connected to the power supply module and the drive circuit module, and is used to receive a protection trigger signal RL and send a control signal to the drive circuit module when the device soft start ends, so as to control the on and off of the drive circuit module; A zero-crossing detection module, the zero-crossing detection module is connected to the power supply module, and is used to perform zero-crossing detection on the acquired power supply voltage ACL and output a zero-crossing pulse signal ZCP; A signal processing module, wherein the signal processing module is connected to the power supply module, the drive circuit module, the anti-burn protection module and the zero-crossing detection module, and is used to receive the zero-crossing pulse signal ZCP and output the start trigger signal TG and the protection trigger signal RL.

2. The soft start anti-burn circuit according to claim 1, characterized in that: The power supply module comprises: A first power supply module, the first power supply module is used to obtain the power supply voltage ACL and output the 12V working voltage; The second power supply module is used to obtain the 12V working voltage and output the 5V VCC.

3. The soft start anti-burn circuit according to claim 2, characterized in that: The first power supply module comprises: FireWire interface AC-L; A resistor R2, one end of which is connected to the live wire interface AC-L to obtain the power supply voltage ACL; A voltage regulator tube D11, wherein the anode of the voltage regulator tube D11 is connected to the other end of the resistor R2; A voltage regulator tube D1, wherein the anode of the voltage regulator tube D1 is connected to the cathode of the voltage regulator tube D11; An inductor L1 and a resistor R3 connected in parallel, wherein a connection point between the inductor L1 and the resistor R3 is connected to the cathode of the voltage regulator tube D1; A polar capacitor C1, wherein a positive electrode of the polar capacitor C1 is connected to a connection point between the inductor L1 and the resistor R3, and a negative electrode of the polar capacitor C1 is grounded; a polar capacitor C2, wherein a positive electrode of the polar capacitor C2 is connected to another connection point of the inductor L1 and the resistor R3, and a negative electrode of the polar capacitor C2 is grounded; A power management chip U1, wherein pins 5, 6, 7 and 8 of the power management chip U1 are connected, the connection points of pins 5, 6, 7 and 8 of the power management chip U1 are connected to another connection point of the inductor L1 and the resistor R3, pins 1 and 2 of the power management chip U1 are connected, and the model of the power management chip U1 is OB2235NCP-H; A voltage regulator tube D3, wherein the anode of the voltage regulator tube D3 is grounded, and the cathode of the voltage regulator tube D3 is connected to the connection point between pin 1 and pin 2 of the power management chip U1; A polar capacitor C3, wherein the positive electrode of the polar capacitor C3 is connected to the pin 4 of the power management chip U1, and the negative electrode of the polar capacitor C3 is connected to the cathode of the voltage regulator tube D3; A voltage regulator tube D4, wherein the cathode of the voltage regulator tube D4 is connected to the pin 4 of the power management chip U1, and the anode of the voltage regulator tube D4 outputs the 12V working voltage; An inductor L2, one end of which is connected to the connection point between the polar capacitor C3 and the voltage regulator tube D3, and the other end of which is connected to the anode of the voltage regulator tube D4; A polarity capacitor C4, wherein the positive electrode of the polarity capacitor C4 is connected to the connection point of the voltage regulator tube D4 and the inductor L2, and the negative electrode of the polarity capacitor C4 is grounded.

4. The soft start anti-burn circuit according to claim 2, characterized in that: The second power supply module comprises: A resistor R4 and a resistor R5 connected in series, the other end of the resistor R4 is grounded, and a connection point between the resistor R4 and the resistor R5 receives the 12V working voltage; A voltage stabilizing chip U2, wherein the pin 2 of the voltage stabilizing chip U2 is connected to the other end of the resistor R5, the pin 1 of the voltage stabilizing chip U2 is grounded, the pin 3 of the voltage stabilizing chip U2 outputs the 5V VCC, and the model of the voltage stabilizing chip U2 is MX7550-SOT89; Capacitor C5, one end of the capacitor C5 is connected to pin 2 of the voltage stabilizing chip U2, and the other end of the capacitor C5 is grounded; Capacitor C9, one end of the capacitor C9 is connected to pin 3 of the voltage stabilizing chip U2, and the other end of the capacitor C9 is grounded; Capacitor C7, one end of the capacitor C7 is connected to pin 3 of the voltage stabilizing chip U2, and the other end of the capacitor C7 is grounded.

5. The soft start anti-burn circuit according to claim 1, characterized in that: The driving circuit module comprises: A neutral line interface AC-N, wherein the neutral line interface AC-N is grounded; The first motor interface AC-N1 and the second motor interface AC-N2; A resistor R28 and a resistor R25 connected in series, the other end of the resistor R28 receiving the start trigger signal TG, and the other end of the resistor R25 being grounded; NPN transistor Q4, with its base connected to the connection point of the resistor R25 and the resistor R28, its emitter grounded, and its collector connected to the 12V working voltage through the resistor R24; A resistor R23 and a capacitor C13 connected in series, the other end of the capacitor C13 being connected to the collector of the NPN transistor Q4; Thyristor Q5, pin 1 of the thyristor Q5 is connected to the first motor interface AC-N1, pin 2 of the thyristor Q5 is connected to the second motor interface AC-N2, and pin 3 of the thyristor Q5 is connected to the other end of the resistor R23; Pin 1 and pin 2 of the thyristor Q5 receive the control signal.

6. The soft start anti-burn circuit according to claim 5, characterized in that: The anti-burn protection module comprises: A resistor R20 and a resistor R13 are connected in series, the other end of the resistor R13 receives the protection trigger signal RL, and the other end of the resistor R20 is grounded; An NPN transistor Q1, whose base is connected to the connection point of the resistor R20 and the resistor R13, and whose emitter is grounded; Relay RL1, pin 3 of the relay RL1 is connected to the collector of the NPN transistor Q1, pin 1 of the relay RL1 is connected to the 12V working voltage, pin 2 of the relay RL1 is connected to pin 1 of the thyristor, and pin 4 of the relay RL1 is connected to pin 2 of the thyristor; When the pin 2 and the pin 4 of the relay RL1 are connected, the control signal is sent to the driving circuit module; A voltage regulator tube D5, wherein a cathode of the voltage regulator tube D5 is connected to pin 1 of the relay RL1, and an anode of the voltage regulator tube D5 is connected to pin 3 of the relay RL1.

7. The soft start anti-burn circuit according to claim 6, characterized in that: The model of the relay RL1 is JQC-3FF.

8. The soft start anti-burn circuit according to claim 1, characterized in that: The zero-crossing detection module comprises: A resistor R18 and a resistor R19 connected in series, the other end of the resistor R18 obtains the power supply voltage ACL, and the other end of the resistor R19 outputs the zero-crossing pulse signal ZCP; Capacitor C16, one end of the capacitor C16 is connected to the other end of the resistor R19, and the other end of the capacitor C16 is grounded.

9. The soft start anti-burn circuit according to claim 1, characterized in that: The signal processing module is a control chip U3; Pin 1 of the control chip U3 is grounded, pin 16 of the control chip U3 is connected to the 5V VCC, pin 13 of the control chip U3 outputs the protection trigger signal RL, pin 14 of the control chip U3 outputs the start trigger signal TG, and pin 15 of the control chip U3 receives the zero-crossing pulse signal ZCP; Capacitor C8, one end of the capacitor C8 is connected to the ground of pin 1 of the control chip U3, and the other end of the capacitor C8 is connected to the 5V VCC of pin 16 of the control chip U3.

10. The soft start anti-burn circuit according to claim 9, characterized in that: The model of the control chip U3 is HHMF018-SOP16.

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