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

The invention discloses a high-voltage and low-voltage signal sampling and transmission system of a high-voltage MCU. The system comprises a sampling circuit unit, a high-voltage processing unit, a high-voltage and low-voltage 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 IGBT temperature detection module which are used for respectively conditioning and detecting a high-voltage side detected signal to generate three paths of analog detection signals, the three paths of analog detection signals obtained by the sampling unit are transmitted to the high-voltage processing unit, the high-voltage processing unit adopts a high-voltage MCU, the high-voltage MCU performs state monitoring and analog-to-digital conversion on the three paths of analog detection signals and outputs digital signals to the high-voltage and low-voltage communication unit, the high-voltage and low-voltagecommunication unit adopt