Composition of electric vehicle controller system
Feb 08, 2023| The control system of electric vehicle motor is generally composed of motor, power converter, sensor and electric vehicle controller.
The electric vehicle motor control system should select a suitable microprocessor system according to the complexity of its control algorithm. The relatively simple ones are the use of single-chip controller, and the complex ones can use DSP controller. The newly developed special chip for motor drive can meet the motor control requirements of some auxiliary systems. For electric vehicle motor controller, it is generally more complex to use DSP processor.
The control circuit mainly includes the following parts: control chip and its drive system, AD sampling system, power module and its drive system, hardware protection system, position detection system, bus support capacitance, etc.
The main power circuit adopts three-phase inverter full-bridge, and the main power switch device is IGBT. Under the condition of high current and high frequency switching, the stray inductance from the electrolytic capacitor to the power switch module has a great impact on the energy consumption of the power circuit and the peak voltage on the module. Therefore, the stacked bus base plate is used to make the stray inductance of the circuit as small as possible to adapt to the characteristics of low voltage and high current operation of the control system.