New design Sensor-Less Vector Control AC Motor Speed Controller

Small controllers may omit overload and overcurrent protection devices. At this time, the external overcurrent protection circuit is used to avoid excessive current. Some small motors have built-in overload protection, which can automatically open circuit to avoid overload in case of overload. Larger motors will have overload relays or temperature sensing relays added to the controller, as well as fuses or circuit breakers to avoid overcurrent. Automatic motor controllers may also include limit switches or other devices to protect the machinery.

The motor controller is an integrated circuit that controls the motor to work according to the set direction, speed, angle and response time through active work. In the electric vehicle, the function of the motor controller is to convert the electric energy stored in the power battery into the electric energy required to drive the motor according to the gear, accelerator, brake and other commands, to control the driving state of the electric vehicle, such as the starting operation, forward and backward speed, climbing strength, or to help the electric vehicle brake, and store part of the braking energy in the power battery. It is one of the key components of electric vehicles