2023 Hot Sale Fan Circuit Solar Ceiling Fan BLDC Motor 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 simplest controller is the switch that connects the motor and the power supply, such as small household appliances or power tools. The switch can be operated manually, or the relay or contactor connected to some sensors can be used to automatically start or stop the motor. The switch can have different selection positions to connect the motor to the power supply in different ways, which may include reducing the voltage when the motor starts, reversing the operation, or selecting different speeds.