Temperature sensor disconnection protection circuit applied to electric power regulator

Abstract

The utility model provides a temperature sensor disconnection protection circuit applied to an electric power regulator, which relates to the technical field of circuit protection of the electric power regulator, and is characterized in that when a thermocouple sensor works normally, a potential difference is generated, and an amplified potential difference signal output by a voltage amplification module enables a contact of a relay K to be closed; at the moment, a base of an NPN type transistor in the disconnection detection module is at a low level, the NPN type transistor in the disconnection detection module is cut off, a high level signal is sent to the controller module, when the thermocouple sensor is disconnected, a potential difference signal output by the voltage amplification module cannot enable a contact of the relay K to be closed, and the thermocouple sensor is disconnected. When the thermocouple sensor is disconnected, an NPN-type transistor in the disconnection detection module is switched on and sends a low-level signal to the controller module, and the thermocouple sensor state monitoring device can send the low-level signal to the controller module when the thermocouple sensor is disconnected and send a high-level signal when the thermocouple sensor works normally, so that the state of the thermocouple sensor is monitored.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit protection of a power regulator, in particular to a temperature sensor open-circuit protection circuit applied to a power regulator. Background Technique

[0002] In recent years, the domestic semiconductor industry has developed well, and the domestic semiconductor material industrial chain has also developed rapidly. Among them, the production equipment of semiconductor materials such as crystal growing furnaces for semiconductor materials has grown rapidly. In the production of semiconductor material crystal growing furnaces, furnace temperature control is an important link. In other electric furnace application environments, the production processes of various products determine specific requirements for the temperature control curve during the production process. Therefore, furnace temperature control is a key link. Accurately controlling the furnace temperature can ensure that the semiconductor material reaches the required temperature conditions during the growth process, thereby obtaining high-quality crystals. Therefore, it is very important to collect temperature and perform real-time monitoring.

[0003] Temperature sensors are very important sensors in many industrial control fields, especially important in the electric furnace heating and temperature control industry. In order to collect the furnace temperature, thermocouple sensors are used as temperature sensors in the prior art. The furnace temperature in a crystal growing furnace usually needs to reach several hundred degrees Celsius or even higher. The thermocouple sensor has a high temperature measurement range and adaptability, and can meet the requirements of such a high-temperature environment. The rapid response of the thermocouple sensor can sense the change of temperature in real time and feedback it to the control system for timely temperature adjustment and control.

[0004] During the production process, the temperature sensor will inevitably have a fault of open-circuit damage, which will lead to the out-of-control of the electric furnace temperature, and the semi-finished products in the production will be scrapped. For example, in the crystal growing furnace in semiconductor material production, if the temperature gets out of control, the semiconductor material being grown will be scrapped. The deficiencies of the prior art are as follows: when using a thermocouple sensor as a temperature sensor, it is impossible to accurately judge whether the thermocouple sensor is damaged. Since the thermocouple sensor often works in a high-temperature environment and is exposed to extreme temperatures and thermal stresses, there is a risk of open circuit, breakage or poor contact of the sensor. However, in the prior art, there is no effective method to monitor and judge the state of the thermocouple sensor in real time. Content of the Utility Model

[0005] The purpose of the utility model is to provide a temperature sensor open-circuit protection circuit applied to a power regulator to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A temperature sensor open-circuit protection circuit applied to a power regulator includes:

[0008] A thermocouple sensor, electrically connected to the input point of the voltage amplification module, is used to convert the temperature value of the environment into a potential difference and send it to the voltage amplification module;

[0009] A voltage amplification module, whose output end is electrically connected to the relay module, is used to amplify the potential difference signal generated by the thermocouple sensor and send it to the relay module;

[0010] A relay module, which includes a relay K. The coil of the relay K is electrically connected to the voltage amplification module, and the contacts of the relay K act under the control of the amplified potential difference signal output by the voltage amplification module;

[0011] A wire break detection module, which includes an NPN transistor Q41. The collector of the transistor Q41 is electrically connected to the controller module through a resistor R41, the emitter is grounded, the base is connected to one end of the contact of the relay K, and the other end of the contact is grounded. The base of the transistor Q41 is also electrically connected to the external power supply VCC through a resistor R43. A resistor R42 is also electrically connected between the emitter of the transistor Q41 and the external power supply VCC. The wire break detection module is used to send a low level or a high level to the controller module according to the opening and closing conditions of the contact of the relay K;

[0012] A controller module, electrically connected to the input end of the drive module, is used to receive the level signal sent by the wire break detection module and send a drive signal with a pulse width modulation waveform to the drive module;

[0013] A drive module, electrically connected to the main power module, is used to amplify the current of the drive signal sent by the controller module and deliver the amplified current to the control end of the main power module;

[0014] A main power module, which includes two reversely connected SCR power tubes in parallel. One end of the parallel connection is used as the input end and is electrically connected to the external AC power supply, and the other end of the parallel connection is used as the load output end. The gate terminal of the SCR power tube is used as the control end and is electrically connected to the drive module. The main power module is used to control the switch and the current magnitude of the load output end.

[0015] Furthermore, the thermocouple sensor uses an E-type thermocouple, and the voltage amplification module uses a dual operational amplifier. The two output ends of the thermocouple sensor are electrically connected to the two input ends of the voltage amplification module, and the output end of the voltage amplification module is electrically connected to the relay module.

[0016] Further, the relay module further includes an NPN transistor Q31. The base of the transistor Q31 is electrically connected to the output terminal of the voltage amplification module through a resistor R32. The emitter is grounded. The collector is electrically connected to one end of the coil of the relay K. The other end of the coil of the relay K is electrically connected to an external power supply VCC. A resistor R31 is further connected in series between the base and the emitter of the transistor Q31. A diode D31 is connected in parallel across the two ends of the coil of the relay K. The positive electrode of the diode D31 is electrically connected to the collector of the transistor Q31.

[0017] Further, the controller module is composed of an ARM chip of the STM32F030 series. One end of a resistor R41 is electrically connected to the emitter of a transistor Q41 in the disconnection detection module, and the other end of the resistor R41 is electrically connected to the general-purpose input / output port of the controller module.

[0018] Further, the main power module includes an SCR power tube D71 and an SCR power tube D72. The current control end of the SCR power tube D71 and the current output end of the SCR power tube D72 are electrically connected and used as the input end of the main power module. The current output end of the SCR power tube D71 and the current control end of the SCR power tube D72 are electrically connected and used as the output end of the main power module. A capacitor C71 and a resistor R71 are connected in series and respectively electrically connected to the input end and the output end of the main power module. The gate terminals of the SCR power tube D71 and the SCR power tube D72 are electrically connected to the drive module.

[0019] Further, the controller module outputs three pulse width modulation waveform signals to the drive module, and the drive module is composed of a Darlington transistor array.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] When the thermocouple sensor works normally, a potential difference will be generated. The amplified potential difference signal output by the voltage amplification module will cause the contact of the relay K to close. At this time, the base of the NPN transistor inside the disconnection detection module is at a low level, and the NPN transistor inside the disconnection detection module is cut off and sends a high-level signal to the controller module. When the thermocouple sensor is disconnected, the potential difference signal output by the voltage amplification module cannot cause the contact of the relay K to close. At this time, the base of the NPN transistor inside the disconnection detection module is at a high level, and the NPN transistor inside the disconnection detection module is turned on and sends a low-level signal to the controller module. The present utility model can send a low-level signal to the controller module when the thermocouple sensor is disconnected and send a high-level signal when the thermocouple sensor works normally, thereby realizing the monitoring of the state of the thermocouple sensor. Description of the Drawings

[0022] Figure 1 This is a schematic diagram of the overall system structure of the present utility model;

[0023] Figure 2 This is a schematic diagram of the connection circuit of the thermocouple sensor and the voltage amplification module in the present utility model;

[0024] Figure 3 This is a schematic diagram of the connection circuit of the voltage amplification module and the relay module in the present utility model;

[0025] Figure 4 This is a schematic diagram of the circuit of the voltage amplification module in the present utility model;

[0026] Figure 5 This is a schematic diagram of the circuit of the relay module in the present utility model;

[0027] Figure 6 This is a schematic diagram of the circuit of the open - circuit detection module in the present utility model;

[0028] Figure 7 This is a schematic diagram of the circuit of the main power module in the present utility model;

[0029] Figure 8 This is a schematic diagram of the connection circuit of the drive module and the main power module in the present utility model;

[0030] Figure 9 This is a schematic diagram of the circuit of the drive module in the present utility model.

[0031] In the figure: thermocouple sensor 10, voltage amplification module 20, relay module 30, open - circuit detection module 40, controller module 50, drive module 60, main power module 70. Specific implementation manner

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0033] Embodiment:

[0034] Please refer to Figures 1 to 9 , the present utility model provides a technical solution:

[0035] A temperature sensor open - circuit protection circuit applied to a power regulator, comprising a thermocouple sensor 10, a voltage amplification module 20, a relay module 30, an open - circuit detection module 40, a controller module 50, a drive module 60 and a main power module 70, wherein:

[0036] The thermocouple sensor 10 uses a type-E thermocouple, which has a relatively high linearity. The thermocouple sensor 10 is electrically connected to the input end of the voltage amplification module 20 and is used to convert the temperature value of the surrounding environment into a potential difference and send it to the voltage amplification module 20. The model of the type-E thermocouple that can be used is Omega XC-E-IM025U-12, which can be selected according to the temperature range and length requirements. The output end of the voltage amplification module 20 is electrically connected to the relay module 30 and is used to amplify the potential difference signal generated by the thermocouple sensor 10 and send it to the relay module 30. The voltage amplification module 20 uses a dual operational amplifier. The two output ends of the thermocouple sensor 10 are electrically connected to the two input ends of the voltage amplification module 20, and the output end of the voltage amplification module 20 is electrically connected to the relay module 30.

[0037] The thermocouple sensor 10 forms a closed loop by two metals of different materials through two temperature junctions. When there is a temperature difference between the two temperature junctions at both ends, due to the Seebeck effect, a potential difference will be generated in the loop. The magnitude of the temperature can be measured according to the magnitude of the potential difference. The main reason for using a dual operational amplifier is to meet the requirement of signal amplification of the thermocouple sensor. The output signal of the thermocouple sensor 10 is a differential signal, that is, the voltage difference between the two output ends of the thermocouple. Using a dual operational amplifier can amplify both the non-inverting and inverting input signals simultaneously, realizing the bidirectional amplification of the differential signal.

[0038] In this embodiment, the voltage amplification module 20 includes an operational amplifier A21 and an operational amplifier A22. The non-inverting input ends of the operational amplifier A21 and the operational amplifier A22 are electrically connected to the thermocouple sensor 10, and the potential difference generated by the thermocouple sensor 10 enters the voltage amplification module 20. The inverting input end of the operational amplifier A21 is respectively electrically connected to a tunable capacitor C21 and a resistor R25. The other ends of the tunable capacitor C21 and the resistor R25 are respectively grounded and connected to an external power supply Vref, realizing the filtering and amplification of the input signal. Resistors R22 and R23 are respectively connected in series between the output ends and the inverting input ends of the operational amplifier A21 and the operational amplifier A22. The resistors R22 and R23 play a role of negative feedback, helping to improve the stability and linearity of the amplifier. The output end of the operational amplifier A21 is electrically connected to the inverting input end of the operational amplifier A22 through a resistor R21, realizing the function of a cascaded amplifier and transmitting the output signal of A21 to A22 for further amplification. The output end of the operational amplifier A22 is used as the output end of the voltage amplification module 20 and is electrically connected to a resistor R32 in the relay module 30.

[0039] The voltage amplification module 20 utilizes the amplification functions of operational amplifiers A21 and A22 to amplify the input signal of the thermocouple sensor 10, and achieves a larger amplification factor through a cascaded amplification structure. Through the cooperation of negative feedback and other circuit elements, the voltage amplification module 20 can effectively amplify the input signal and provide an output. The output signal can be further connected to the relay module 30. The models that can be adopted for the operational amplifiers A21 and A22 are AD8601.

[0040] The relay module 30 includes a relay K. The coil of the relay K is electrically connected to the voltage amplification module 20. The contacts of the relay K act under the control of the amplified potential difference signal output by the voltage amplification module 20. The relay module 30 further includes an NPN-type transistor Q31. The base of the transistor Q31 is electrically connected to the output terminal of the voltage amplification module 20 through a resistor R32, the emitter is grounded, and the collector is electrically connected to one end of the coil of the relay K. The other end of the coil of the relay K is electrically connected to the external power supply VCC. A resistor R31 is also connected in series between the base and the emitter of the transistor Q31. A diode D31 is connected in parallel across the two ends of the coil of the relay K, and the positive electrode of the diode D31 is electrically connected to the collector of the transistor Q31.

[0041] The open-circuit detection module 40 includes an NPN-type transistor Q41. The collector of the transistor Q41 is electrically connected to the controller module 50 through a resistor R41, the emitter is grounded, and the base is connected to one end of the contact of the relay K. The other end of the contact is grounded. The base of the transistor Q41 is also electrically connected to the external power supply VCC through a resistor R43. A resistor R42 is also electrically connected between the emitter of the transistor Q41 and the external power supply VCC. The open-circuit detection module 40 is used to send a low level or a high level to the controller module 50 according to the opening and closing conditions of the contact of the relay K.

[0042] When the thermocouple sensor 10 works normally, it will generate an electromotive force difference. The amplified electromotive force difference signal output by the voltage amplification module 20 will make the base of the transistor Q31 at a high level. At this time, the transistor Q31 is turned on, and the coil of the relay K forms a loop, and the contact is closed. At this time, the base of the transistor Q41 inside the open-circuit detection module 40 is at a low level, the transistor Q41 inside the open-circuit detection module 40 is cut off, and a high-level signal is sent to the controller module 50. When the thermocouple sensor 10 is open-circuited, the thermocouple sensor 10 does not output an electromotive force difference signal, and the electromotive force difference signal output by the voltage amplification module 20 is not sufficient to make the base of the transistor Q31 reach a high-level state. At this time, the transistor Q31 is cut off, and the coil of the relay K cannot be energized. At this time, the contact is normally open, the base of the transistor Q41 inside the open-circuit detection module is at a high level, the transistor Q41 is turned on, and a low-level signal is sent to the controller module 50. A low-level signal can be sent to the controller module when the thermocouple sensor is open-circuited, and a high-level signal is sent when the thermocouple sensor works normally, so as to realize the monitoring of the state of the thermocouple sensor.

[0043] The input end of the controller module 50 is electrically connected to the driving module 60, and is used to receive the level signal sent by the open-circuit detection module 40 and send a driving signal of a pulse width modulation waveform to the driving module 60. The controller module 50 is composed of an ARM chip of the STM32F030 series. The emitter of the transistor Q41 in the open-circuit detection module 40 is electrically connected to a resistor R41, and the other end of the resistor R41 is electrically connected to the general-purpose input / output port of the controller module 50. The controller module 50 outputs three pulse width modulation waveform signals to the driving module 60. The controller module 50 outputs three pulse width modulation (PWM) waveform signals, which is an existing technology and is commonly used to control parameters such as the speed and brightness of motors or other devices. This technology does not involve method improvement. The controller module 50 has multiple general-purpose input / output ports (GPIO). These GPIO ports can be configured as output modes and generate PWM signals. In order to output three PWM signals, the controller module 50 can use three of these GPIO ports. Each GPIO port is configured as a PWM output through a specific control register, and the frequency and duty cycle can be set. In the controller module 50, according to the required PWM signal frequency and duty cycle, the corresponding register values are set. Then, the controller module 50 generates the corresponding PWM signal through the GPIO port according to the set parameters.

[0044] The driving module 60 is electrically connected to the main power module 70 and is used to amplify the current of the driving signal sent by the controller module 50 and deliver the amplified current to the control end of the main power module. The driving module 60 is composed of a Darlington transistor array. In this embodiment, the Darlington transistor array uses Darlington transistors with 7 channels. A Darlington transistor is composed of two triodes compounded together, which is equivalent to a triode, but has a much larger current amplification factor than a single triode, improving the current driving ability. The controller module 50 outputs three pulse width modulation waveform signals, namely PWM1, PWM2, and PWM3. In this embodiment, PWM1 and PWM2 are 50 Hz, and PWM3 is 10 kHz. PWM3 is respectively superimposed and amplified with PWM1 and PWM2 and then outputs two PWM waves with a frequency of 10 kHz, which can greatly reduce the volume of transformers T1 and T2.

[0045] In this embodiment, the Darlington transistor array includes 7 driving signal input terminals 1B - 7B, 7 output driving terminals 1C - 7C, and an E terminal grounded and a power supply input terminal COM. Specifically, the driving module 60 is such that 1B and 2B are connected in parallel and then electrically connected to 6C, 3B, 4B, and 5B are connected in parallel and then electrically connected to 7C, 6B and 7B are connected in parallel and used as the input terminal of signal PWM3. The 1B terminal and the 3B terminal are respectively electrically connected to one end of resistors R61 and R62. The other ends of resistors R61 and R62 are respectively used as the input terminals of signals PWM1 and PWM2. The model of the Darlington transistor array used is ULN2003A.

[0046] The driving module 60 further includes transformers T61 and T62. One end of the primary side of transformer T61 is electrically connected to the 1C and 2C terminals through resistor R64, and the other end is grounded through resistor R66 and light-emitting diode D62, and this end is also electrically connected to an external power supply VCC. One end of the secondary side of transformer T61 is electrically connected to the input terminal AC1 of the main power module 70, and the other end is electrically connected to the gate terminal of SCR power tube D71 through diode D64. A capacitor C62 and a resistor R68 are connected in parallel on the secondary side of transformer T61.

[0047] One end of the primary side of transformer T62 is electrically connected to the 3C, 4C, and 5C terminals through resistor R63, and the other end is electrically connected to the COM terminal through Schottky diode D61. Schottky diode D61 is in parallel with resistor R65. The models of Schottky diode D61 that can be used are 1N5819 and BAT54, and can be selected according to parameters such as voltage, current, and reverse recovery time. One end of the secondary side of transformer T62 is electrically connected to the output terminal AC2 of the main power module 70, and the other end is electrically connected to the gate terminal of SCR power transistor D72 through diode D6. Capacitor C61 and resistor R67 are connected in parallel on the secondary side of transformer T61. The models of pulse transformers T1 and T2 that can be used are PE-65612 or PCH-27.

[0048] The main power module 70 includes two SCR power transistors connected in reverse parallel. One end of the parallel connection is used as the input terminal and is electrically connected to an external AC power supply, and the other end of the parallel connection, the output terminal, is used as the load output terminal. The output terminal of the main power module 70 is electrically connected to the heating device of the semiconductor material crystal growth furnace to drive the heating device to work. The gate terminal of the SCR power transistor is used as the control terminal and is electrically connected to the drive module 60. The main power module 70 is used to control the switch and current magnitude of the load output terminal. The main power module 70 includes SCR power transistor D71 and SCR power transistor D72. The current control terminal of SCR power transistor D71 and the current output terminal of SCR power transistor D72 are electrically connected and used as the input terminal of the main power module 70. The current output terminal of SCR power transistor D71 and the current control terminal of SCR power transistor D72 are electrically connected and used as the output terminal of the main power module 70. Capacitor C71 and resistor R71 are connected in series and are respectively electrically connected to the input terminal and the output terminal of the main power module 70. The gate terminals of SCR power transistors D71 and D72 are electrically connected to the drive module 60. The models of SCR power transistors D71 and D72 that can be used are 2N5064 or the BT151 series.

[0049] The input signal of the drive module 60 comes from three pulse width modulation (PWM) waveform signals of the controller module 50 and enters the module through different input terminals of the drive module 60. Transformers T61 and T62 play a role in isolating and matching signals in the entire circuit. The working principle of the drive module 60 is to amplify the current of the PWM signal sent by the controller module 50 through a Darlington transistor array and transmit the amplified current to the control terminal of the main power module 70, thereby realizing the control of the main power module 70.

[0050] The control terminal of the main power module 70 is the gate terminal of the SCR power tube, which is electrically connected through the output signal of the drive module 60. The output signal of the drive module 60 controls the conduction and cutoff of the SCR power tube through the gate terminal of the SCR power tube, thereby realizing the switching control of the load output terminal. The capacitor C71 and the resistor R71 play a role in filtering and stabilizing in the circuit.

[0051] The working principle of the main power module 70 is to control the conduction and cutoff of the SCR power tube through the drive module 60, thereby controlling the switching of the load output terminal and the magnitude of the current. The output signal of the drive module 60 controls the SCR power tube through the gate terminal of the SCR power tube, thereby realizing the control of the main power module 70.

[0052] After receiving the high-level signal, the controller module 50 will issue a corresponding drive signal. The drive module 60 amplifies the current of the drive signal and turns on the SCR power tube in the main power module 70, allowing the current to flow to the load output terminal to realize temperature control. After receiving the low-level signal, the controller module 50 will issue a corresponding drive signal. The drive module 60 amplifies the current of the drive signal and turns off the SCR power tube in the main power module 70, preventing the current from flowing to the load output terminal to realize the detection and protection of the disconnection of the thermocouple sensor 10.

[0053] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A temperature sensor disconnection protection circuit for an electric power regulator, characterized in that: include: A thermocouple sensor, which is electrically connected to an input point of the voltage amplification module and is used to convert the temperature value of the environment into a potential difference and send it to the voltage amplification module; A voltage amplification module, the output end of which is electrically connected to the relay module, and is used to amplify the potential difference signal generated by the thermocouple sensor and then send it to the relay module; A relay module, wherein the relay module comprises a relay K, wherein the coil of the relay K is electrically connected to the voltage amplification module, and the contact of the relay K is operated under the control of the amplified potential difference signal output by the voltage amplification module; A disconnection detection module, the disconnection detection module includes an NPN-type transistor Q41, the collector of the transistor Q41 is electrically connected to the controller module through a resistor R41, the emitter is grounded, the base is connected to one end of the contact of the relay K, and the other end of the contact is grounded, the base of the transistor Q41 is also electrically connected to an external power supply VCC through a resistor R43, and a resistor R42 is also electrically connected between the emitter of the transistor Q41 and the external power supply VCC. The disconnection detection module is used to send a low level or a high level to the controller module according to the opening and closing conditions of the contacts of the relay K; A controller module, the controller module is electrically connected to the input end of the driving module, and is used to receive the level signal sent by the disconnection detection module, and send a driving signal of a pulse width modulation waveform to the driving module; A driving module, the driving module is electrically connected to the main power module and is used to amplify the current of the driving signal sent by the controller module and transmit the amplified current to the control end of the main power module; The main power module includes two reverse-parallel SCR power tubes, one end of the parallel connection is used as the input end and is electrically connected to the external AC power supply, the other end of the parallel connection is used as the load output end, the gate end of the SCR power tube is used as the control end and is electrically connected to the drive module, and the main power module is used to control the switch and current size of the load output end.

2. A temperature sensor disconnection protection circuit for an electric power regulator according to claim 1, characterized in that: The thermocouple sensor adopts an E-couple thermocouple, the voltage amplification module adopts a dual operational amplifier, the two output ends of the thermocouple sensor are electrically connected to the two input ends of the voltage amplification module, and the output end of the voltage amplification module is electrically connected to the relay module.

3. A temperature sensor disconnection protection circuit for an electric power regulator according to claim 2, characterized in that: The relay module also includes an NPN-type transistor Q31, the base of the transistor Q31 is electrically connected to the output end of the voltage amplifier module through a resistor R32, the emitter is grounded, the collector is electrically connected to one end of the coil of the relay K, and the other end of the coil of the relay K is electrically connected to an external power supply VCC. A resistor R31 is also connected in series between the base and the emitter of the transistor Q31, and a diode D31 is also connected in parallel at both ends of the coil of the relay K, and the anode of the diode D31 is electrically connected to the collector of the transistor Q31.

4. A temperature sensor disconnection protection circuit for an electric power regulator according to claim 1, characterized in that: The controller module is based on an ARM chip of the STM32F030 series. The emitter of the transistor Q41 in the disconnection detection module is electrically connected to a resistor R41, and the other end of the resistor R41 is electrically connected to a universal input / output port of the controller module.

5. The temperature sensor disconnection protection circuit for an electric power regulator according to claim 1, characterized in that: The main power module includes an SCR power tube D71 and an SCR power tube D72. The current control end of the SCR power tube D71 and the current output end of the SCR power tube D72 are electrically connected to serve as the input end of the main power module. The current output end of the SCR power tube D71 and the current control end of the SCR power tube D72 are electrically connected to serve as the output end of the main power module. The capacitor C71 and the resistor R71 are connected in series and are electrically connected to the input end and the output end of the main power module respectively. The gate ends of the SCR power tube D71 and the SCR power tube D72 are electrically connected to the driving module.

6. A temperature sensor disconnection protection circuit for an electric power regulator according to claim 5, characterized in that: The controller module outputs three pulse width modulation waveform signals to the driving module, and the driving module is constructed based on a Darlington transistor array.

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