Editing PWM rectifier

{{Short description|AC to DC power converter}}
{{More citations needed|date=May 2022}}

'''PWM rectifier''' ([[Pulse-width modulation]] [[rectifier]]) is an [[Alternating current|AC]] to [[Direct current|DC]] power [[Electric power conversion|converter]], that is implemented using forced commutated power [[Electronics|electronic]] [[semiconductor]] [[switch]]es. Conventional PWM converters are used for wind turbines that have a permanent-magnet alternator.<ref>{{Cite web |title=Three Phase Sinosoidal PWM based Rectifier |url=https://www.mathworks.com/matlabcentral/fileexchange/28536-three-phase-sinosoidal-pwm-based-rectifier |access-date=2022-04-28 |website=www.mathworks.com |language=en}}</ref>

Today, insulated gate [[Insulated-gate bipolar transistor|bipolar]] [[transistors]] are typical switching devices. In contrast to [[diode]] bridge rectifiers, PWM rectifiers achieve bidirectional power flow. In frequency converters this property makes it possible to perform regenerative braking. PWM rectifiers are also used in distributed power generation applications, such as [[micro turbine]]s, [[fuel cell]]s and [[windmill]]s.

The major advantage of using the pulse width modulation technique is the reduction of higher order harmonics. It also makes it possible to control the magnitude of the output voltage, and improve the power factor by forcing the switches to follow the input voltage waveform using a [[Phase-locked loop|PLL loop]]. Thus we can reduce the total harmonic distortion ([[Total harmonic distortion|THD]]).

==Types of PWM rectifiers==

* [[Warsaw rectifier]] (invented 1992)
* [[Vienna rectifier]] (invented 1993)

==References==
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[[Category:Electronic circuits]]


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