While simple loads do not draw reactive power from the grid, complex loads also receive reactive power from the grid as well as active power. It is desirable that the reactive power drawn from the mains is zero (PF = cosØ = 1) because the reactive power generates magnetic field in the electromagnetic devices and unnecessarily leads to voltage drop and loss by loading the line and production transmission devices.
LOW POWER FACTOR
The low power factor has two reasons. First, the low-power multiplier due to the capacitive and inductive loads in the circuit is solved by Current Sinusoidal, Phase-boat, THD low-circuit Parallel Capacitance and Inductance (Compensation).
The second is the low-power multiplier generated by the harmonic current-carrying loads, such as uncontrolled rectifiers.
Current non-sinusoidal, phase kayak or not, THD high
Passive PFC control
is solved by active PFC control.
Single Phase Full Wave Rectifier;
Classification of PFC Techniques;
Passive PFC Methods
DISADVANTAGES OF PASSIVE PFC METHODS
They consist of large elements and place and weight on the circuit
According to the load to respond differently, the
dynamic response to slow,
as a result of the phase shift PF decrease, the
harmonics of the network frequency fluctuations in the opposite vice versa, etc.
ACTIVE PFC METHODS AND ADVANTAGES
Small and lightweight elements, Stable and not affected by network frequency variations, Providing improvement to allow for circuit design to fit international standards, Approximately standart 1 em Power Factor and less than 5% THD performance stable output
Investigation of Boost Converter from Active PFC Methods;
CONCLUSION AND DISCUSSION
Active PFC methods, which provide stable output thanks to feedback due to their wide range of input signal, are becoming more and more common due to their ability to deliver performance at approximately standart 1 laş Power Factor and less than 5% THD. PFC is also becoming a must for better quality product design and more efficient energy use.
Any cost reduction R & D work to be carried out at this point will be accepted by many electronic manufacturers.
POWER FACTOR CORRECTING MULTI OUTLET SWITCHED
RESOURCES THEORY AND PRACTICE, Tariq Kirac July 2007,
DESIGN OF A SINGLE-PHASE FULL-BRIDGE DIODE RECTIFIER
POWER FACTOR CORRECT EDUCATIONAL TESTING SYSTEM,
Teoman Unal, December 2006
Digital Control of Switching Power Supply Power Factor Correction
Stage, Sangsun Kim, P. Enjeti José Rodríguez, Ph.D., Pablo
Lezana, Samir Kouro, and Alejandro Weinstein, Department of
Electronics, Universidad Técnica Federico Santa María, Valparaíso,
AC / DC Switch Mode Power Supply Design Guide, Fairchild