A four pole AC motor operates on a three-phase, 25 Hz, 208 V supply. What is thesynchronous speed?
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A four pole AC motor operates on a three-phase, 25 Hz, 208 V supply. What is the
synchronous speed?
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- Differentiate between the AC and DC magnetic fields applied to an induction motor stator.In an induction motor, if the supply voltage is above normal then the machine will operate with High power factor Less heating O Low power factor O Less currentA separately excited DC generator has six poles and is running at 1150 rpm. The armature has 120 slots with 8 conductors per slot and is connected as wave winding. The generated voltage in each conductor is 1.5 V and each conductor can carry a full load current of 4 A. What is the output power?
- The back emf of a dc motorA small series-wound dc motor is operated from a 12-V car battery. Under a normal load, the motor draws 4.0 A, and when the armature is clamped so that it cannot turn, the motor draws 24 A. What is the back emf when the motor is operating normally?Appliances in home that use DC motor and briefly explain why it works as reverse DC generator
- The dc motor has maximum current at start because: OThe back emf is maximum. OThe back emf is zero.An AC generator has a no-load voltage setpoint of 610 V and a full-load voltage of 595 V. What is the voltage droop of the machine?250 v ,4pole wavw wound DC series motor has 782 conductors on its armature and series field resistant of 0.75 ohm the motor takes a current of 40amp esstimate its speed and its torque developed if it has a flux per pole of 2mWb