Positive temperature coefficient (PTC) heater driving module for electric automobile air conditioner

Abstract

The invention discloses a positive temperature coefficient (PTC) heater driving module for an electric automobile air conditioner. The PTC heater driving module comprises a PTC driving module, wherein one end of a pin B2 of the PTC driving module is connected with an air conditioner controller, and the other end of the pin B2 is connected with resistors R1 and R2; one end of a pin B1 is connected with an electronic control unit and the other end of the pin B1 is connected with resistors R1 and R3; the other end of the resistor R3 is connected with a base of a triode; the other end of the resistor R2 is connected with a collector of the triode, a resistor R4 and a fuse; the other end of the fuse is connected with a negative electrode of a diode and the input end of a power field effect tube driving integrated circuit; the output end of the power field effect tube driving integrated circuit is connected with a gate of a power field effect tube; an emitter of the triode, the resistor R4, a positive electrode of the diode and the ground end of the power field effect tube driving integrated circuit are grounded; a drain of the power field effect tube is connected with the PTC heater; and a source of the power field effect tube is grounded. A P-channel metal oxide semiconductor field effect transistor (P-MOSFET) replaces an electromagnetic relay, so that the PTC heater driving module is high in switching speed and does not generate impact and noise when running.

Description

technical field [0001] The invention relates to a PTC heater driving and control module for an automobile air conditioner, in particular to a PTC heater driving module for an electric automobile air conditioner. Background technique [0002] As the global energy becomes increasingly tense and the regulations on energy conservation and emission reduction in various countries become more and more stringent, electric vehicles have become a development direction for automobiles to solve energy problems. As the auxiliary subsystem with the largest power consumption of electric vehicles, the air conditioning system accounts for 60% to 70% of the power consumption of all auxiliary subsystems. Energy is critical. [0003] The difference between the heating methods of the air-conditioning systems of traditional cars and electric cars is that: electric cars do not have the waste heat of the engine to use, and need to use heat pump air-conditioning systems or auxiliary PTC heaters; if...

AI Technical Summary

Problems solved by technology

[0003] The difference between the heating methods of the air-conditioning systems of traditional cars and electric cars is that: electric cars do not have the waste heat of the engine to use, and need to use heat pump air-conditioning systems or auxiliary PTC heaters; if PTC heaters are used, at present, the control of their working status is mainly through DC high-voltage relay is used to realize the high-voltage DC relay, and the cost of DC high-voltage relay is high, and once the PTC is turned on, it can only work at full power, and cannot adjust the heating amount according to the needs of the use environment, resulting in huge waste of power consumption

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