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Design Guidelines for a Power Factor Correction (PFC) Circuit Using a Capacitor and an NTC Thermistor

It is a ratio between the power that does the actual work and the power that is delivered to the equipment. It is a dimensionless entity with a value varying, theoretically, between 0 and 1. A practical value of the PF, in the real world, varies between 0.65 and 1. When its value is less than 1, additional power is required to operate electrical components such as transformers, induction motors, or high-intensity discharge lighting.
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