A flywheel is employed with a dc compound motor to reduce the peak demand, the compound motor should be:

Related MCQs

• A shunt motor runs at 500rpm on a 200V circuit. Its armature resistance is 0.5Ω and the current taken is 30A in addition to field current. What resistance must be placed in series with armature circuit to reduce to speed to 300 rpm; the current in armature remains same.
• A 200V DC series motor runs at 500rpm when taking a line current of 25A.The resistance of the armature is 0.3Ω and that of the series field is 0.5Ω. If current taken remains constant, calculate the resistance necessary to reduce the speed to 350rpm.
• If the back emf in a dc motor varnishes suddenly, then the motor:
• A thick wire is used in dc series motor field winding than that in dc shunt motor:
• A DC shunt motor is driving a constant torque load. On inserting an additional resistance in the armature circuit, the speed of the motor will:
• The shaft torque in a DC motor is less than total armature torque because of ____in the motor
• ____ motor is a variable speed motor.
• For 20% increase in current, the motor that will give the greastest increase in torque is ___ motor
• A DC motor develops torque of the 100Nm at 400 rpm, at 300 rpm a motor will develop torque of___.
• The most suitable motor for elevators is the ___ motor.