The development history of automobile motor

標籤motor  drive  controller  2020-04-27 12:25

At present, electric vehicles are AC motors. The power is provided by the on-board battery, which can only provide direct current to the vehicle. The battery provides direct current, while the motor requires alternating current. In other words, DC power must be changed to AC power to drive AC motors.

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The first bottleneck in the development of electric vehicles is the power battery, and the second bottleneck is the electric vehicle motor controller. In the past, trolleybuses were powered online by sliding contact networks. The DC engine has been used to drive cars, but was later changed to an AC engine. At present, electric vehicles are AC motors. The power is provided by the on-board battery, which can only provide direct current to the vehicle. The battery provides direct current, while the motor requires alternating current. In other words, DC power must be changed to AC power to drive AC motors. Electric cars are becoming more and more popular, and more and more people are asking for more knowledge. The quality of the motor drive control system is related to the safe and reliable operation of electric vehicles. The motor drive system is mainly composed of motors and power electronic devices

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The converter, digital controller and sensor are composed of several core parts. Induction motors, permanent magnet synchronous motors and switched reluctance motors are mainly used in motor drive systems for electric vehicles. Motor drive control systems have evolved from power electronic inverters to IGBT integrated modules and sensors to integrated smart sensors. As for the motor control method, the conventional control methods are the excitation control method of the DC motor and the armature voltage control method. Switched reluctance motor angular position control, current chopping control and voltage control; induction motor mainly includes voltage / frequency control, slip frequency control, vector control and direct torque control. In recent years, many advanced control methods have emerged, including adaptive control, variable structure control, fuzzy control and neural network control, closed-loop control, robust control, sliding mode control, expert system, model reference adaptive control, decoupling control , Cross-coupling control and coordinated control, these are suitable for motor drive.

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