Suppose you have a motor with a power factor significantly less than 1. Explain why it would be...


Suppose you have a motor with a power factor significantly less than 1. Explain why it would be better to improve the power factor as a method of improving the motor's output, rather than to increase the voltage input.

Power factor

Power factor is the ratio of working power of the load to apparent power flowing in the circuit. If the motor is less loaded, the power factor reduces. So when the motor load is less than 70 percent, the power factor value of a motor is decreased.

Answer and Explanation: 1

Power factor is the measure of how incoming power is used in the system.

When the power factor is less than one, then the production of voltage and current are not in a phase. It is known that the device produces more output power when the power factor is more. It means that improving the power factor would improve the efficiency of the system. However, if the input power is increased by increasing the input voltage, then the power supplied to the motor will be higher.

This process gives a greater power output. But, this does not increase the motor efficiency, and increasing the input power will either slow down the motor or will damage the motor.

Hence, it is better to increase the power factor by improving the output power of the motor rather than increasing the input voltage.

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