An AC induction machine has six poles and isdesigned for 60-Hz, 240-V (rms) operation. When themachine operates with 10 percent slip, it produces60 N-m of torque.a. The machine is now used in conjunction with an800-W constant power load. Determine the speedand slip of the machine when used with theabove-mentioned load.b. If the machine has an efficiency of 89 percent,what minimum rms current is required foroperation with the load of part a?Hint: You may assume that the speed–torque curve isapproximately linear in the region of interest.
An AC induction machine has six poles and isdesigned for 60-Hz, 240-V (rms) operation. When themachine operates with 10 percent slip, it produces60 N-m of torque.a. The machine is now used in conjunction with an800-W constant power load. Determine the speedand slip of the machine when used with theabove-mentioned load.b. If the machine has an efficiency of 89 percent,what minimum rms current is required foroperation with the load of part a?Hint: You may assume that the speed–torque curve isapproximately linear in the region of interest.
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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Question
An AC induction machine has six poles and is
designed for 60-Hz, 240-V (rms) operation. When the
machine operates with 10 percent slip, it produces
60 N-m of torque.
a. The machine is now used in conjunction with an
800-W constant power load. Determine the speed
and slip of the machine when used with the
above-mentioned load.
b. If the machine has an efficiency of 89 percent,
what minimum rms current is required for
operation with the load of part a?
Hint: You may assume that the speed–torque curve is
approximately linear in the region of interest.
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