Electrical Transformers and Rotating Machines
4th Edition
ISBN: 9781305494817
Author: Stephen L. Herman
Publisher: Cengage Learning
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Question
Chapter 18, Problem 28RQ
To determine
The number of phases which must be applied to stepping motor, when it is connected to AC power.
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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:
A motor works when it is connected to AC. By mistake you connect it to
DC, but you see it also works with DC. What kind of motor is it?
Name three factors that determine the amount of voltage induced in the rotor of a wound-rotor motor.
Chapter 18 Solutions
Electrical Transformers and Rotating Machines
Ch. 18 - Prob. 1RQCh. 18 - Prob. 2RQCh. 18 - Prob. 3RQCh. 18 - Prob. 4RQCh. 18 - What is the advantage of the capacitor-start...Ch. 18 - Prob. 6RQCh. 18 - Prob. 7RQCh. 18 - Prob. 8RQCh. 18 - Prob. 9RQCh. 18 - Prob. 10RQ
Ch. 18 - Prob. 11RQCh. 18 - Prob. 12RQCh. 18 - What type of single-phase motor develops the...Ch. 18 - What is the principle of operation of a repulsion...Ch. 18 - What type of commutator is used with a...Ch. 18 - When a repulsion-start induction-run motor reaches...Ch. 18 - Prob. 17RQCh. 18 - Prob. 18RQCh. 18 - Prob. 19RQCh. 18 - How is the speed of a consequent pole motor...Ch. 18 - Why can a multispeed fan motor be operated at...Ch. 18 - What is the speed of operation of the Warren...Ch. 18 - What is the speed of operation of the Holtz motor?Ch. 18 - Prob. 24RQCh. 18 - Prob. 25RQCh. 18 - What does the term bifilar mean?
Ch. 18 - Why do stepping motors have teeth machined in the...Ch. 18 - Prob. 28RQCh. 18 - Prob. 29RQCh. 18 - Prob. 30RQCh. 18 - Prob. 31RQCh. 18 - What is the function of the compensating winding?
Ch. 18 - Prob. 33RQCh. 18 - Prob. 34RQCh. 18 - Explain how to set the neutral plane position of...Ch. 18 - Explain how to set the neutral plane position by...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- 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_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_forwardWhat is the advantage of a capacitor start induction run motor over a resistance start induction run motor?arrow_forward
- 1- What are the functions of accumulators?2- Draw the hydraulic symbols for a pressure –temperature compensated flow control valveand Bidirectional motor?arrow_forward26. Explain the principles of DC motors, including the DC permanent magnet motor and how it can have speed control. (10 marks)arrow_forwardAn AC power source is connected across 325 turns of an autotransformer, and the load is connected across 260 turns. What is the turns ratio of this transformer?arrow_forward
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