A 400-volt DC series motor, of total armature and field resistance of 0.7 , draws 50A at full-load. The full-load speed is 500 rpm and the constant loss is 1500W. Assume that the magnetic circuit is unsaturated. Find: (i) The full-load shaft torque. (ii) The input current if the torque is doubled. (iii)The speed at that new torque.

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Motor Load, Torque, and Power Quality Requirement

An electric motor is a gadget that changes electrical energy into mechanical energy over to follow up on a mechanical burden. The weight set on the motor because of this mechanical movement is known as motor load. Appropriately matching the motor burden to the engine is vital to forestall harm to the engine or wasteful and unnecessary expensive activity. Engines perform such undertakings as moving a thing starting with one spot then onto the next, cutting it, changing its shape, etc. The motors might be evaluated as far as a few variables including power yield, voltage, current, and temperature. Harm to an engine might happen when it is worked under over the top engine load contrasted with its appraised limit.