Motors

Motors

Contributors in Motors

Motors

In an AC motor, refers to the number of magnetic poles in the stator winding. The number of poles is a determinant of the motor's speed. In a DC motor, refers to the number of magnetic poles in the ...

polyphase motor

Electrical equipment; Motors

Two or three-phase induction motors have their windings, one for each phase, evenly divided by the same number of electrical degrees. Reversal of the two-phase motor is accomplished by reversing the ...

revolutions per minute (R.P.M.)

Electrical equipment; Motors

The number of times per minute the shaft of the motor (machine) rotates. This is a function of design and the power supply.

random wound

Electrical equipment; Motors

The standard type of stator winding used in motors under 1,000 volts. The coils are random wound with round wire as opposed to flat form wound coils.

permanent magnet synchronous (PMR)

Electrical equipment; Motors

A motor with magnets embedded into the rotor assembly, which enable the rotor to align itself with the rotating magnetic field of the stator. These motors have zero slip (constant speed with load) ...

phase

Electrical equipment; Motors

Indicates the space relationships of windings and changing values of the recurring cycles of A.C. voltages and currents. Due to the positioning (or the phase relationship) of the windings, the ...

plug reversal

Electrical equipment; Motors

Reconnecting a motor's winding in reverse to apply a reverse braking torque to its normal direction of rotation while running. Although it is an effective dynamic braking means in many applications, ...