High-precision magnetic encoder system based on rotor magnetic field of permanent magnet motor

The invention discloses a high-precision magnetic encoder system based on a rotor magnetic field of a permanent magnet motor, which comprises a mounting groove formed in a rear end cover of the motor and opposite to rotor magnetic steel, and a PCB (Printed Circuit Board) provided with a magnetic sensor is arranged in the mounting groove; the system also comprises a post-stage signal processing and resolving unit. According to the high-precision magnetic encoder system based on the rotor magnetic field of the permanent magnet motor, no extra magnet is needed, rotor position information can be obtained by directly utilizing the rotor magnet, the precision of the encoder is improved, meanwhile, materials are saved, the size of the motor is reduced, and the integration degree of the motor is increased; and the magnetic sensor has a good low power consumption characteristic, so that the battery is generally not required to be replaced in the life cycle of the motor. 本发明公开了一种基于永磁电机转子磁场的高精度磁编码器系统，包括有开设于电机后端盖正对转子磁钢处的