In a(n) ____________________ test, the high-voltage winding is used as the primary and the low-voltage winding is short-circuited.
Fill in the blank(s) with the appropriate word(s).
short-circuit
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A 220 V, 1500 rpm, 11.6 A (armature current), separately excited motor is controlled by a single-phase, full-wave SCR converter. The armature resistance of the motor is 2 ?. The ac source voltage is 230 V (rms) 60 Hz. Enough inductance is added to ensure continuous conduction for any torque greater than 25% of rated value. (Ignore the the rotational losses.)
a. Calculate the triggering angle for a speed of 1000 rpm at rated torque. b. Assuming that the torque is a fan-type, calculate the triggering angle for a motor speed of 900 rpm. c. Sketch the speed-torque characteristics showing the operating points of cases (a) and (b).
In a ratio control system, the input to the controller is received from the ____________________ (controlled flow, wild flow) and the output of the controller is sent to the ______________________________ (controlled flow, wild flow).
Fill in the blank(s) with the appropriate word(s).