How large is ea at the motor''s rated conditions

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Reference no: EM131203087

A 480-V 100-kW 0.8-PF leading 50-Hz four-pole Y-connected synchronous motor has a synchronous reactance of 1.8 W and a negligible armature resistance. The rotational losses are also to be ignored. This motor is to be operated over a continuous range of speeds from 300 to 1500 r/min, where the speed changes are to be accomplished by controlling the system frequency with a solid-state drive.

(a) Over what range must the input frequency be varied to provide this speed control range?

(b) How large is E_A at the motor's rated conditions?

(d) What is the largest value that E_Acould be at 300 r/min?

(e) Assuming that the applied voltage V_Φ is derated by the same amount as E_A , what is the maximum power the motor could supply at 300 r/min?

(f) How does the power capability of a synchronous motor relate to its speed?

Reference no: EM131203087

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