The motor controller, as one of the core components of an electric vehicle, plays a crucial role in determining the vehicle's power performance. It receives the vehicle's requirements from the vehicle controller, extracts electrical energy from the power battery pack, modulates the currents and voltages needed for motor control through its own inverter, and provides them to the electric motor, ensuring that the motor's speed and torque meet the requirements of the vehicle.

Motor Controller System Components:

1) Central Control Module:

   - PWM (Pulse Width Modulation) waveform generation circuit

   - Reset circuit

   - Sensor signal processing circuit

   - Interfacing circuit

The central control module receives instructions and status information from other components of the vehicle through external interfaces. Internally, it translates the instructions and passes them to the inverter driver circuit while monitoring the control effectiveness.

2) Power Module:

The main component of the motor controller is an inverter that controls the motor's current and voltage. Commonly used power devices include MOSFETs, GTOs, IGBTs, and others.

3) Drive Control Module:

The drive control module converts the instructions from the central control module into on/off commands for the controllable silicon devices in the inverter. It also functions as a protection device, monitoring and protecting against faults such as overvoltage and overcurrent.

4) Sensors:

Sensors used in the system include current sensors, voltage sensors, temperature sensors, motor shaft angle position sensors, etc. The selection and addition of sensors depend on the design requirements.