The motor of an electric actuator can operate on any voltage and is used across many different industries. The most common voltages used in single-phase motors are
· 115 VAC
· 24 VAC
· 12 VDC
· 24 VDC
· 208 VAC
· 230 VAC
In addition to these options, three-phase motors also use voltages of 230 VAC and 460 VAC.
An actuator’s brake is mounted on top of the motor. It’s responsible for stopping the media from forcing the valve open when it should be closed by locking the motor rotor in position when not in use.
The motor start capacitor is the third main component of an electric actuator with AC motor. It gives the motor enough power to start. Electric actuators with DC motors do not require a capacitor.
The final critical component of an electric actuator is the two single-pole, double-throw (SPDT) end of travel limit switches. One is for the closed position, and the other is for the open position. These switches provide the adequate number of electrical contacts in the immediate, closed, and open positions.