High voltage signal and low voltage signal sampling and transmission system based on high voltage MCU

A high voltage signal and low voltage signal sampling and transmission system based on a high voltage microcontroller unit (MCU), comprising a sampling unit, a high voltage processing unit, a communication unit and a low voltage processing unit;

• wherein:
• the sampling unit comprises a bus voltage sampling module, a phase voltage detection module and an insulated gate bipolar transistor (IGBT) temperature detection module, the sampling unit is configured to condition and detect a measured signal on a high voltage side, and generate three-way analog detection signals;
• the three-way analog detection signals obtained by the sampling unit are transmitted to the high voltage processing unit;
• the high voltage processing unit adopts the high voltage MCU, and the high voltage MCU is configured to perform state monitoring and analog-to-digital conversion on the three-way analog detection signals, and output a digital signal to the communication unit;
• the communication unit adopts an isolated communication unit to transmit the three-way digital signal converted by the high voltage MCU to the low voltage processing unit;
• and
• the low voltage processing unit adopts a low voltage MCU to realize sampling and communication of high and low voltage sampling signals.