A 220 V shunt motor driving its normal load draws an armature current of 50 A from a 220 V dc source. The armature resistance of this motor including brushes is 0.25 ohms. How much armature current (minimum) Will this motor draw from a 200 V DC source when driving the same load with the field adjusted to maintain the same speed.

Q: A 250 V shunt motor, having an armature resistance of 0.2 ohm draws from the mains a current of 50…

A: Given V=250 V armature resistance =Ra =0.2 Ω at half full load, armature current =Ia1 =50 A Initial…

Q: What are the three basic types of three-phase motors?

A: There are three basic types of three-phase motors, which are categorized based on the way they are…

Q: A shunt DC motor is fed from a 235 V DC source. The field coil has a resistance of 116 12. The total…

A: The given magnetization characteristics is shown below. The given characteristics is at a speed…

Q: . In a dc shunt motor, the shunt field resistance is 100 ohms and the armature resistance is 0.01…

A: The speed of the DC shunt motor is inversely proportional  to flux. The flux is  directly…

Q: A 55 hp, 440 V, 400 rpm DC shunt motor draws 107 A when operating at rated conditions. The motor has…

A:

Q: If the armature current in a dc machine is 400A, what should be the current in each winding if the…

A: Note In Lap winding,  Number of pole (P) = Number of Parallel path (A) In Wave winding, Number of…

Q: de motors

A:

Q: 55 hp, 440 V, 400 rpm DC shunt motor draws 107 A when operating at rated conditions. The motor has…

A: In this question we will draw diagram of dc shunt motor showing all  resistance,currents and…

DC Series Motors

A DC motor is a type of electric motor which converts electric energy into mechanical energy. The forces that are produced by the magnetic field are what those common types of motors rely upon. Either electro-mechanical or electronic, all types of DC motors have some internal mechanism to change the current direction in part of the DC motors. As the DC motors could be powered from existing DC lighting power distribution systems, these motors were the first form of motors widely used. By changing the strength of the current in its field winding or by using a variable supply voltage, the speed of the DC motors can be controlled over a wide range.