现代电动汽车旋变传感器原理及检测

Principle and Detection of Resolver for Modern Electric Vehicle

现代纯电动汽车驱动电机普遍采用永磁同步电机,基于定向矢量控制技术,电机位置、转速传感器普遍采用磁阻式旋转变压器,旋变传感器信号需要通过R/D转换器处理,才能给DSP或MCU进行读取,旋变的信号对电机的控制精度非常重要。因此文章通过分析现代纯电动汽车驱动电机的控制方案,针对AD公司的解码芯片AD2S1205进行研究,该芯片采用Type II跟踪环路,环路连续跟踪旋变的位置和速度,而不需要外部转换和等待状态,具有系统故障检测,可以检测旋变信号的丢失,输入信号超范围或位置信号跟踪丢失。对采用该控制方案的现代纯电动汽车报旋变传感器故障,以吉利帝豪EV450纯电动汽车为例,对旋变系统的故障现象、故障产生机理、故障检测提供了完整的检修方案。

Modern all-electric drive motor widely used permanent magnet synchronous motor,based on the directional vector control technology,the motor position and speed sensor widely used magnetic resistance type rotating transformer,spin variable sensor signals need to deal with,through the R/D converter to DSP and MCU read,spin variable signal for motor control precision is very important.Therefore,by analyzing the control scheme of the drive motor of modern pure electric vehicle,this paper aims at the decoding chip AD2S1205 of AD company.The chip adopts Type II tracking loop,which continuously tracks the position and speed of rotation without external conversion and waiting state.It has system fault detection and can detect the loss of rotation signal.Input signal is out of range or position signal tracking is lost.Taking Geely Emgrand EV450 pure electric vehicle as an example,a complete overhaul scheme is provided for the fault phenomenon,fault generation mechanism and fault detection of the rotating system.