Types of Motors II

2. The end structure of an electric motor that normally contains the bearings and lubrication system.
5. The region of a magnet towards which the lines of magnetic induction converge (south pole) or from which the lines of induction diverge (north pole).
6. This is the voltage-generating effect of an electric motor’s rotor turning within the motor.
8. Circuit in which the current leads the voltage.
9. An electronic device in a motor circuit that is used to control motor speed for variable-speed motors.
13. The rotating or moving component of a motor, including the shaft.
14. A switch that uses a centrifugal action to disconnect the start windings from the circuit.
15. The speed at which the variable frequency drive’s power device switches the waveform’s positive and negative halves on and off is referred to as the switch frequency or carrier frequency.
16. A two wire Alternating Current (AC) power circuit.

1. A compressor starting devices which are variable resistors that vary their resistance when the surrounding temperature changes.
3. An alternating current motor where the rotor turns from induced magnetism from the field windings.
4. The amount by which the current leads or lags the voltage.
7. An electrical storage device used to start motors (start capacitor) and to improve the efficiency of motors (run capacitor).
10. Cycles per second.
11. The minimum back electromotive force (BEMF) that the potential relay coil must experience or its armature will drop out and the contacts between terminals 1 and 2 will close.
12. An electrical device activated by a change in current flow.