A 440 V d.c. Armature resistance of shunt motor is 0.25 Ω and field winding resistance is 220 Ω. A motor draws a current of 40 A from the mains and runs at 1500 rpm when it supplies some load. Now find the speed of the motor when a resistance of 0.8Ω is connected in series with the armature. Assume armature current constant. The shunt field flux remains constant.

Q: 8. Find the counter-EMF voltage of a permanent magnet DC motor when it runs at 2080 rpm. The…

A: The solution is given below

Q: 2. Assume negligible inductance for the motor model shown in Figure 1. This motor is connected to a…

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Q: The armature of a shunt generator has 0.08-ohm effective resistance. Each brush has an effective…

A: In a shunt generator is having, Armature resistance, Ra=0.08 Ω. Resistance of each brush, Rb=0.02 Ω…

Q: A 250 V series motor has an armature resistance of 0.2 ohm and a series-field resistance of 0.18…

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Q: The shunt DC generator gives almost O Constant current O None of these O Constant voltage O Constant…

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Q: Maximum torque is realized when an armature winding is with the magnetic field at 90° O inline or at…

A: With reference to synchronous machines, the load angle or the power angle is the angle between the…

Q: The stationary windings or magnets of a DC motor are called the

A: In the DC motor, there are stationary windings are also called magnet of the DC motor.

Q: R1 jX1 jX2 -> IM R, RC jXM E1 S

A: Induction motor working Principle When an ac supply is connected to a stator it creates a rotating…

Three Phase Induction Motor

The induction motor is an electric motor that runs on AC (alternating current) and it is of two type single phase motor that work on single-phase power supply and three-phase motor that work on three-phase power supply.