A control method and system for a vehicle-mounted electric compressor

By employing multi-stage speed control and intelligent protection mechanisms, the problem of frequent compressor start-stop in electric vehicle air conditioning systems has been solved, improving system reliability and passenger comfort.

CN122275531APending Publication Date: 2026-06-26BAOJI HUSN ENG VEHICLE +1
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BAOJI HUSN ENG VEHICLE
Filing Date
2026-04-03
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

In the existing technology, the design and research of compressor controllers for electric vehicle air conditioning systems are insufficient, resulting in frequent compressor start-stop, which affects passenger comfort and system reliability.

Method used

A multi-stage speed control strategy and intelligent protection mechanism are adopted, including self-test, temperature compensation, overvoltage, undervoltage, overcurrent, overtemperature and peak overcurrent protection. Combined with the coordinated work of the vehicle controller and the compressor controller, intelligent speed regulation and fault detection of the compressor are realized.

Benefits of technology

Without affecting the cooling effect, the problem of frequent start-stop of the compressor caused by triggering the evaporator overheat and overpressure protection was solved, thus improving the reliability of the system and passenger comfort.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122275531A_ABST
    Figure CN122275531A_ABST
Patent Text Reader

Abstract

This invention provides a control method and system for an on-board electric compressor, including: when the compressor starts for the first time, the compressor controller initiates a self-test process to check whether the internal voltage of the controller is normal; if the internal voltage is within a preset voltage range, subsequent control steps are executed; if the internal voltage exceeds the preset voltage range, it is determined that the internal voltage of the controller is faulty, and subsequent control steps are not executed; the opening signals of the AC switch and the blower switch are transmitted sequentially to the vehicle controller via the evaporator thermostat and the pressure switch; the vehicle controller sends a high-voltage enable signal through the multi-in-one integrated controller and sends a compressor start / stop signal to the compressor controller; after receiving the compressor start / stop signal, the compressor controller starts the compressor and operates with a multi-stage speed control strategy; this invention solves the problem of frequent compressor start / stop caused by triggering the evaporator over-temperature protection and over-pressure protection devices without affecting the cooling effect of the cab.
Need to check novelty before this filing date? Find Prior Art