Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 47, Problem 4SQ
What method is used to sense armature and field current?
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What is armature reaction, and how its effect can
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Can you explain why there is an armature voltage even when the field current is zero?
What is the commutator pitch of a 4-pole, duplex wave-wound armature having 120 commutator bars?
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- What is the plex of an armature winding?arrow_forward5) The deflecting torque of an ammeter varies as the square of the current flowing through it. If a current of 10 A produces a deflection of 90°, what deflection would occur for a current of 5 A when the instrument is (a) spring controlled and (b) gravity controlled? [Ans. (a) 22.5°, (b) 14.5°]arrow_forwardExplain the following armature winding terminologies (i)commutator Pitch (ii)Coil Side (iii)Pole Pitcharrow_forward
- 5. A 12-pole armature wound simplex lap has 1620 conductors. Each conductor has a resistance of 0.1 and generates an average voltage of 0.66 V. The conductors are rated 8 A. Find: (a) The armature resistance (b) The armature voltage (c) The rated armature current (d) The rated power of the armaturearrow_forwardWhat is armature winding? What is its history of discovery? give some examples and uses of it.arrow_forwardA 10 pole d.c. machine has a lap wound armature. It has 600 conductors, each of resistance 0.05 ohm. What is the armature resistancearrow_forward
- Explain the working of Moving iron Attraction type of Instrument with a neat diagram Explain the significance of Eddy current damping in an indicating Instrument. What is the principle of ballistic galvanometer?arrow_forwardPlease type your Solutions and or diagram them so that they are easy to read I have bad eyesightarrow_forward9- The example of electric ciruit of machine parts is a. Armature core b. Field poles c. commutator d. Yokearrow_forward
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