(a)
In DC motor, quadrant of operation can be defined by the
armature voltage and
current of the motor. By using an appropriate diagram, briefly
explain the
definition of all four quadrant of operation based on armature
voltage and current.
(b)
A chopper is used to control speed of 45.36 kW, 1750 rpm, 240 V,
189 A
permanent magnet DC motor with 0.01 Ω armature resistance. This
chopper-fed
DC motor is able to operate in both motoring and braking
mode...