Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 8, Problem 5SQ
To determine
Explain the effects on the contactor when the blowout coil’s terminals are reversed.
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Chapter 8 Solutions
Electric Motor Control
Ch. 8 - Prob. 1SQCh. 8 - What is the principal difference between a...Ch. 8 - What causes the arc to move upward in a blowout...Ch. 8 - Why is it desirable to extinguish the arc as...Ch. 8 - Prob. 5SQCh. 8 - Why will the blowout coil also operate on AC?Ch. 8 - Prob. 7SQCh. 8 - Are ON control stations used in multiple locations...
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- Why will the blowout coil also operate on AC?arrow_forwardIn a single phase AC capacitor start and run induction motor, to make the rotation in anti-clockwise direction, the capacitor is connected in a. series with running coil b. parallel with starting coil c. series with starting coil d. parallel with running coilarrow_forward12) Welding generator will have A. Lap winding B. Wave winding C. Delta winding D. Duplex wave winding E. Star windingarrow_forward
- How to calculate the pitch factor of a 8 pole alternator with an armature wound coils having 18 / 24 fractioanl pitch. Can you please show the solution in details.arrow_forwardFor the design we assuming following parameters 1) winding : Lap 2) simplex 3) Number of slots : 16 , single turn coil with 2 conductors per slot 4) Number of poles = 4arrow_forwardAnswer is 2.93 hz. Take No. Of poles = 2.arrow_forward
- What are the following statements are true for a three-phase induction motor? I. Three-phase induction motor stator winding is fed from a single-phase supply II. Stator carries a three-phase winding III. Rotor carries a short circuited winding a. I,II and III b. I only c. I and II only d. II and IIIarrow_forwardExplain the operation of the blowout coil used in dc contactorsarrow_forwardDifferentiate between the AC and DC magnetic fields applied to an induction motor stator.arrow_forward
- Explain the need for connecting a capacitor in the auxiliary winding of a single phase induction motor.arrow_forward1) Calculate the coil pitches and indicate the slots into which the first coil should be place for the following armature windings a. 36 slots , 4 poles b. 57 slots , 4 poles c. 76 slots , six poles d. 132 slots , eight poles e. 270 slots , 10 polesarrow_forwardHow to adjust reactive power in synchronous machine? A) by changing the load applied to the shaft B) by changing the frequency C) by changing the excitation current D) by changing the applied voltagearrow_forward
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