A 100 hp, 250 V, 350 A shunt dc motor with an armature resistance of 0.05 ohms. To limit maximum starting current to twice the rated of its value, what will be the number of stages of starting resistances?

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DC Motors topics include: Characteristics of dc motors and speed control of dc motors, pmdc and dc motor starting.

A Direct Current (DC) motor is a motor that turns energy from a direct current and turns this into mechanical energy. There are 3 main types of DC motors are: Series, Shunt and Compound. These terms relate to the type of connection of the field windings with respect to the armature circuit.

Related Test: Electrical Machines Practice Test: DC Machines


A 100 hp, 250 V, 350 A shunt dc motor with an armature resistance of 0.05 ohms. To limit maximum starting current to twice the rated of its value, what will be the number of stages of starting resistances?