If the voltage applied across the armature of a DC shunt motor is increased by 5% keeping its load current and field constant, what will be the effect on its speed? * increase by 10 per cent decrease by about 5 per cent increase by about 5 per cent remain unchanged

Q: A 220 V dc shunt motor draws a current of 50 A from the supply and runs at 900 rpm. Its armature and…

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Q: A 220 V, 15 kW, 850 r.p.m. shunt motor draws 72.2 A when operating at rated condition. The…

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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.