The speed of a motor is controlled by 10 V to 24 signal. As a result, the speed varies from 330 revolutions/sec to 400 revolutions /sec. determine the speed resulting from an input volt of 13V In terms of percentage of span.

Speed control of a 140 V, 1.68 kW DC motor single phase thyristor full wave AC-DC It is made by the converter. AA supply voltage 220 V (rms) Is 50. In the converter It is assumed that there is no loss. The armature resistance of the DC motor is = 0.417 Q. Very a large inductance is connected in series with the motor. The motor voltage constant is = 0.0964 V/rpm. The motor can be considered as a permanent magnet DC. According to this, a) Draw the driver (converter-motor) power circuit. b) Calculate the nominal current of the motor. c) Supply voltage, supply current, converter output voltage for ignition angle a = 30 ° and Draw the waveforms for the converter output current. d) = 950 rpm and for nominal current, d1) The firing angle of the converter, d2) Effective value of supply and thyristor current, d3) Supply power factor, calculate.

The speed regulation of a motor falls from 1100 rpm at no load to 1050 rpm at rated load. The speed regulation of the motor is:

The output power of a shunt motor is 7.8 hp. Its armature draws 50 A from 120 V. The armature and field winding resistances are 0.1 and 100 ohms, respectively. Find the efficiency of the motor.