Questions tagged [power-factor-correction]

A circuit that compensates the reactive characteristics of a load to make behave as close as possible to a resistive load in order to maximize the power consumption efficiency.

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How to adjust the switching speed of Totem-Pole Bridgeless PFC? [on hold]

How can I vary the switching speed of the totem pole PFC? Increasing the MOSFET gate area can vary switching frequency of the MOSFET. So does it mean it also vary the PFC rectifier switching speed? ...
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Power factor and Harmonics associated with Electric Vehicle charging

What is the power factor associated with (typical) DC fast chargers and onboard chargers in electrical vehicles? Also, how much is the harmonic content (especially triple-N harmonics) associated with ...
45 views

How do I solve for Capacitance in this circuit?

I know that the equivalent resistance of this circuit will be $$R_1-j/(\omega*C_x)+L_1+(R_2-C_1)||L_2$$ $$(3+.814j)-j/(4737*C_x)+[(4j)(30-8j)]/(30-4j)$$ I don't know what to do from here; I could ...
82 views

How to think about Power Factor when adding new devices to a generator

I've been tasked with checking to see if an existing backup generator will be powerful enough to handle a new building in addition to the buildings it is currently handling. First, here is the ...
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Does using electronics with poor power factor affect the pulse power capability of a generator rated for a certain KVA?

The situation is such: There is a multi-pole, three-phase, permanent magnet generator (rated for 100 KVA, let's say) that feeds into a simple diode rectifier with a capacitive/DC Voltage load (...
2k views

Effect of load on power factor in induction motor

I got stuck in an MCQ question. Which is as following : Q.1) power factor of a squirrel cage induction motor is : (a) Low at heavy load only (b) Low at light and heavy loads (c) Low ...
3k views

PFC using arduino

I'm trying to make a power factor correction system using arduino. In the first i successes to calculate the PF using arduino and XOR gate Following picture is my circuit: simulate this circuit &...
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Which power factor is better in an industry -0.21 or -0.94 and why?

In the electrical panels , when i switched on-off the capacitor bank then power factor gets shifted from 0.89(lagging/during OFF condition) to -0.87(leading/during ON condition) , similarly on ...
114 views

supply power factor of a residential transformer

A transformer winding is generally more inductive than resistive thus there is a considerable phase difference between voltage and current, so wouldn't the supply power factor be very very poor in ...
205 views

Control of interleaved boost converter

In a school project we will try to implement a control system for a boost power factor correction (PFC) converter. The converter circuit can be seen below (http://www.ti.com/lit/an/slyt517/slyt517.pdf)...