Active Pfc Power Supply Meaning

Input voltage is 187 277vac single or 3 phase and an optional 277 480vac 3 phase.

Active pfc power supply meaning.

Reactive power operates at right angles to true power and energizes the magnetic field. Reactive power has no real value for an electronic device but electric companies charge for both true and reactive power resulting in unnecessary charges. Some types of the active pfc are buck boost buck boost and synchronous condenser. Also known as power factor controller is a feature included in some computer and other power supply boxes that reduces the amount of reactive power generated by a computer.

At 602x441x258mm it offers up to 10 outputs and has a built in active pfc function. For any power supply design over 100w the preferable type of pfc is active power factor correction active pfc since it provides a lighter and more efficient power factor control. The power factor correction is a technique of increasing the power factor of a power supply. Active pfc is the use of power electronics to change the waveform of current drawn by a load to improve the power factor.

But active pfc is also more efficient in the use of power compared to passive pfc. One disadvantage of active pfc is. Active pfc is comprised of a switching regulator operating at a high switching frequency being able to generate a theoretical power factor of over 95. The pfc power supply should be connected to an uninterruptible power supply to ensure the devices have suitable power in case the main power source goes out.

Although computer power supplies draw only a fraction of their full capacity during it s steady state normal operation pfc power supplies have the potential to draw their full capability during initial inrush. Switching power supplies without power factor correction draw current in short high magnitude pulses. Active pfc circuits are the most popular are built into the switchmode power supply and can increase the pf to 0 98 or higher. Power supplies with active pfc may experience incompatibility problems with a ups that does not provide pure sine wave power output when the power supply switches from ac power to ups battery power.

Active power factor correction automatically corrects for ac input voltage and is capable of a wide range of input voltage. The closer the pf comes to being 1 0 the better the performance of the power supply. Pfc power factor correction. Power factor correction is a circuit design technique to increase the power factor of a device so that it approaches 1 or unity power factor.

A basic active pfc circuit consists of a control circuit that measures the input voltage and current and then adjusts the switching time and duty cycle to ensure that the input voltage and current are in phase. It also reduces the cost of electricity by minimizing the amount of reactive power produced by computers and other devices. This method provides a more efficient correction is lighter and less bulky. Your computer uses a power supply that utilizes active power factor correction active pfc to improve efficiency.

They have a built in active pfc function. Specifications taken from the packaging of a 610 w pc power supply showing active pfc rating. These pulses can be smoothed out by using active or passive techniques.