A 250V series motor runs at 500 rpm at rated load current of 75 A. The armature circuit has a resistance of 0.2 of which 0.07 is the resitance of the series field winding. If flux is proportional to the armature current, Find (a) The speed when the armature current is 40 A and the supply voltage drops by 10% from its normal value. (b) The speed when a 2 N resistance is connected in series with the armature and torque is 80% of the rated value, the supply voltage being 10% more than the nominal.

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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.