Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Question
Chapter 33, Problem 2RQ
To determine
The number of speeds that can be obtained when using a single stator winding in a consequent pole motor.
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Students have asked these similar questions
Name three factors that determine the amount of voltage induced in the rotor of a wound-rotor motor.
The reason why the starting torque of a series motor is higher than a shunt motor is
because the series motor has
O more current flowing through its armature
O a stronger net magnetic field around both coils during the inrush of stator current
Problem 5
1.
Where and why is a centrifugal switch used in a split-phase motor?
2.
Why and where is a capacitor used in the single-phase AC motor?
3. What type of motor would you select to perform each of the following jobs?
(a) Electric drill:
(b) Refrigerator:
(c) Hair driers and desk fans:
(d) Air Conditioner Fan:
(e) XY plotters and printers:
(f) Electric clock:
Chapter 33 Solutions
Understanding Motor Controls
Ch. 33 - Prob. 1RQCh. 33 - Prob. 2RQCh. 33 - What is the advantage of consequent pole motors...Ch. 33 - Prob. 4RQCh. 33 - Refer to the circuit shown in Figure 33–6. You are...Ch. 33 - Refer to the circuit shown in Figure 336. What is...Ch. 33 - Refer to the circuit shown in Figure 33–7. When...Ch. 33 - Prob. 8RQCh. 33 - Refer to the circuit shown in Figure 33–11....Ch. 33 - Refer to the circuit shown in Figure 3311. You are...
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- When a repulsion-start induction-run motor reaches about 75% of rated full-load speed, it stops operating as a repulsion motor and starts operating as a squirrel-cage motor. What must be done to cause the motor to begin operating as a squirrel-cage motor?arrow_forwardWhat type of commutator is used with a brush-lifting repulsion-start induction-run motor?arrow_forwardWhat type of single-phase motor develops the highest starting torque?arrow_forward
- A three-phase squirrel-cage motor is connected to a 60-Hz line. The full-load speed is 870 RPM. How many poles per phase does the stator have?arrow_forwardDefine motorarrow_forwardThe supply frequency is 50 Hz. What will be the rotor voltage frequency if the motor speed is equal to 90% of synchronous speed. O 45 Hz. O 10 Hz. 05 Hz. O None.arrow_forward
- 7. Who among the following got a patent for an induction motor in 1888? A. Newton B. Torilcelli C. Nichola Tesla D. Thomas Edisonarrow_forwardWhat is the advantage of consequent pole motors over some other types of variable speed motors?arrow_forwardA wound rotor induction motor has a stator that contains six poles per phase. How many poles per phase are in the rotor circuit?arrow_forward
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