The capacitor start/capacitor run motor has both a start and run capacitor in the circuit. The start capacitor is switched out once achieving start-up. This type of motor has higher starting, lower loaded currents, and higher efficiency. The drawback is the expense that's required for two capacitors and a switching device. Reliability also plays a factor on account of the switching mechanism.
The three phase induction motor is wound for three phase alternating voltage. These are the simplest and most rugged electric motors available. The motor could be designed for either DELTA or WYE hook-up. This type is designed for continuous use and high starting torques. Motor speed is relatively constant. If three phase voltage is available this is the motor to choose.
Two phase servo motors are used in servo systems, hence the name. They are very sensitive to voltage variations on the control phase. This style requires two voltages in 90 degrees phase shift from each other in order to produce a rotating magnetic field. Servo motors have high torque to inertia ratio, high speed and works well for velocity control applications. Tachometer feedback devices can be supplied with these motors.
No comments:
Post a Comment