Deck 33: Consequent Pole Motors

Question 1

Figure 33-10A
​

The above figure shows a four-speed, two-winding three phase consequent pole motor with constant ____________________.

Answer 1

horsepower

Question 2

Consequent pole motors intended to operate with four speeds use ____________________ reconnectable windings.

Answer 2

two

Question 3

The number of stator poles is changed by redirecting the ____________________ through pairs of poles.

Answer 3

current

Question 4

The magnetic field makes one ____________________ of a two-pole motor each complete cycle.

Question 5

If the winding is such that the series delta gives the low speed and the parallel wye gives the high speed, the torque will be the same for both speeds.

Question 6

In a circuit for controlling a four-speed, three phase consequent pole motor, how is any speed selected?

Question 7

How many windings do consequent pole motors that are intended to operate with three speeds have?

Question 8

Explain how the direction of current flow determines the number of poles.

Question 9

Figure 33-7

The circuit shown in the accompanying figure forces the motor to start in high speed.

Question 10

Consequent pole motors have the ability to change speed by changing the number of ____________________.

Question 11

Why are eleven pin control relays used to provide interlock protection?

Question 12

Three-speed consequent pole motors can be wound to produce constant horsepower, constant torque, or variable torque.

Question 13

What are the two factors that determine the synchronous speed of an AC motor?

Question 14

The magnetic field travels through the same number of poles during each complete cycle.

Question 15

A three phase, two-pole motor contains eight actual poles.