mean well power supplies

Power factor correction (PFC) is a technique of counteracting the undesirable effects of electric loads that create a power factor (p. f. ) that is less than 1, (or unity).

Explanation

When an electric load has a p. f. Mean Well | MeanWell | Enclosed Switching Power Supply. lower than unity, the apparent power delivered to the load is greater than the real power that the load consumes. Only the real power is capable of doing work, but the apparent power determines the amount of current that flows into the load, for a given load voltage.

Energy losses in transmission lines increase with increasing current. Power companies therefore require that customers, especially those with large loads, maintain the power factors of their respective loads within specified limits or be subject to additional charges. Engineers are often interested in the power factor of a load as one of the factors that affect the efficiency of power transmission. Mean Well is a Switching Power Supply manufacturer
in Taiwan.

For a linear circuit operating from a sinusoidal voltage, the current must be a sinusoid at the same frequency. When the current is exactly in phase with the voltage, the power factor is 1. This corresponds to a purely resistive load. A toaster is an example of an approximately linear device, an electric motor is not. For a non-linear circuit, such as a switchmode power supply, the current is not necessarily sinusoidal. Information on Mean Well Power Supplies. In that case there is current at harmonics of the voltage frequency.