Calculate the following:
A three-phase, six-pole, Y-connected, 60 Hz, 480 V induction motor is driving a
300 Nm constant-torque load. The motor has rotational losses of 1 kW. The motor
is driven by a slip energy recovery system. The triggering angle of the dc/ac
converter is adjusted to 100o
a. Motor speed
b. Current in the dc link
c. Rotor rms current
d. Stator rms current
e. Power returned back to the source
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Answer the following statement true (T) or false (F)
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a. electric toaster b. electric hedge trimmer c. chain saw d. incandescent light bulb
A(n) ____ is a thickened section of the foundation, which helps it resist the pressure exerted by the earth on the outside.
A. pilaster B. girder C. anchor D. beam
Technician A says that magnetic lines of force can be seen by placing iron filings on a piece of paper and then holding them over a magnet. Technician B says that the effects of magnetic lines of force can be seen using a compass. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician