Power supply circuit, circuit fault detection method, circuit board and vehicle-mounted air conditioner

Abstract

The invention discloses a power supply circuit, a circuit fault detection method, a circuit board, a vehicle-mounted air conditioner and a computer readable storage medium. The power supply circuit comprises a boosted circuit, a controller and a detection part. The boost circuit comprises a first voltage-multiplying part, a second voltage-multiplying part, a switch assembly, a first capacitor anda second capacitor. The switch assembly comprises a first switch part and a second switch part. The detection part is connected with the switch assembly, to obtain a feedback voltage value of the switch assembly, and output a signal value based on the feedback voltage value. The controller is connected with the detection part, to obtain a signal value and adjusting the conduction duration of the switch assembly according to the size of the signal value. The detection part can obtain the feedback voltage value, and the controller can analyze and judge the signal value corresponding to the feedback voltage value and the withstand voltage value of the switch assembly, so that the feedback voltage value can be used as a judgment condition for reducing the conduction duration of the switch assembly, and the effect of protecting the switch assembly can be achieved.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a power supply circuit, a circuit fault detection method, a circuit board, a vehicle air conditioner and a computer-readable storage medium. Background technique [0002] At present, the car air conditioner is generally powered by batteries, but the direct drive of the battery to drive the compressor requires a very large output current, so that the compressor needs to be wound with very thick copper wires; the existing car air conditioner power supply circuit generally converts the battery voltage After boost conversion, it is provided to the compressor. Since the voltage boost can reduce the current under the same power, the purpose of reducing the volume of the compressor and reducing the cost can be achieved. However, the existing boosting power supply circuit generally adopts two interleaved boosting circuits, and uses two switch components to control the two boosting ci...

AI Technical Summary

Problems solved by technology

When one of the switch components does not work normally, such as abnormal conduction, the voltage value loaded on the other switch component will be large and easily lead to damage, thereby causing the power supply circuit to fail. The existing power supply circuit is not equipped with Measures to detect whether the switch parts are working normally

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