An eight-pole, 24 KW, 180 V, DC machine has a duplex LAP-wound armature which has 72 coils with 10 turns per coil. Its rated speed is 2400 RPM. Assume a dead zone of 4 coils that are always beyond poles faces. Find the constant K, and the flux per pole to produce 180 V at no-load conditions. Answers The constant K is : The flux per pole is: mWb/pole.

An eight-pole, 24 KW, 180 V, DC machine has a duplex LAP-wound armature which has 72 coils with 10 turns per coil. Its rated speed is 2400 RPM. Assume a dead zone of 4 coils that are always beyond poles faces. Find the constant K, and the flux per pole to produce 180 V at no-load conditions. Answers The constant K is : The flux per pole is: mWb/pole.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

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Concept explainers

Winding and Constructions

Alternating Current (AC) winding is generally of the 3-phase type due to the inherent advantages of the 3-phase machine. Armature coils must be connected to the yield balance (equivalent in magnitude and 2/3 of the series phase difference of the rod) 3-phase electromotive forces (emf). The armature should be divided into step-bands to start with slots around the perimeter.In the construction of AC machines, the frame is used as an external protective shield to protect it from environmental conditions. The frame also serves as the outer perimeter, allowing the interior to be easily placed. The static state section of the devices is the stator winding attached stator.

Question

An eight-pole, 24 KW, 180 V, DC machine has a duplex LAP-wound armature which has
72 coils with 10 turns per coil. Its rated speed is 2400 RPM. Assume a dead zone of 4 coils
that are always beyond poles faces.
Find the constant K, and the flux per pole to produce 180 V at no-load conditions.
Answers
The constant K is :
The flux per pole is:
mWb/pole.

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