Power factor and harmonics are difficult problems to control simultaneously. With the use of asymmetric trap control in passive harmonic filters, both problems are resolved.
Power factor is a measurement of the cosine of the angle between current and voltage. Ideally, we want the power factor to be near unity, PF=1, however, in many instances, power factor falls into the category of either leading or lagging. To achieve power factor correction, extra equipment must be installed to assist in bringing the voltage and current into phase.