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 and a vehicle-mounted air conditioner. The power supply circuit comprises a boost circuit, a first detection part and a controller. The boost circuit comprises a first voltage-multiplying part, a second voltage-multiplying part, a switch assembly, a first capacitor and a second capacitor. The first detection part is connected with the switch assembly. The controller is connected with the first detection part and the switch assembly. According to the power supply circuit, through arranging the first detection part, the first detection part is used for obtaining the first voltage value of the first switch part, the controller can detect the working state of the switch assembly according to the first voltage value, and therefore the power supply circuit can detect faults caused by the fact that the switch part does not work normally, and working reliability can be improved.

Description

technical field [0001] The invention relates to the technical field of air conditioners, 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, car air conditioners generally use batteries to drive the operation, but using batteries to directly drive the compressor needs to output a very large current, so that the compressor needs to use very thick copper wires for winding; the existing car air conditioner power supply circuit generally uses the battery The voltage is provided to the compressor after step-up conversion. Since the voltage step-up can reduce the current under the same power, the purpose of reducing the volume and cost of the compressor 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 circu...

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 correct. Measures to detect failures due to switching components not functioning properly

Images