The electric actuator of the valve is basically a deceleration motor. The motor can have various voltages and is the main torque generating component. In order to prevent thermal damage caused by overwork or excessive power consumption, the motor of valve electric actuator is usually equipped with a thermal overload sensor embedded in the motor winding.
The sensor is connected in series with the power supply, which opens the circuit when the motor is overheated and closes the circuit when the motor reaches the safe working temperature. The motor consists of armature, electrical winding and gear set. When power is supplied to the winding, a magnetic field will be generated, which will cause the armature to rotate. As long as the winding is energized, the armature will rotate; When the power supply is cut off, the motor stops running.
The standard end of the travel limit switch required by the electric actuator can accomplish this task. The electric actuator of the valve relies on the gear train directly connected to the motor to enhance the motor torque and determine the output speed of the actuator.