Permanent magnet synchronous motor controller based on CAN bus

The utility model discloses a permanent magnet synchronous motor controller based on a CAN bus, and belongs to the technical field of permanent magnet synchronous motor controllers. The problem that a permanent magnet synchronous motor controller in the prior art is complex in structure and low in reliability is solved. The device comprises a power supply circuit, a main control chip, a CAN communication circuit, a stator current acquisition module, a bus voltage acquisition module, an overcurrent and overvoltage protection module, a PWM output module and a rotary transformer decoder, the power supply circuit stably supplies power to the main control chip, the overcurrent and overvoltage protection module prevents the main control chip from being damaged by high voltage, control information is received through the CAN communication circuit, and the PWM output module outputs the control information to the main control chip. The rotating speed and angle information is obtained through stator current collected b