Flyback PFC With a Series-Pass Module in Cascode Structure for Input Current Shaping

A flyback power factor corrector (PFC) using a series-pass module (SPM) to shape its input current is presented. The input current is profiled by the SPM with its waveform controlled to be in the same wave shape and phase with the supply voltage and its magnitude controlled to regulate the output vo...

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Published inIEEE transactions on power electronics Vol. 34; no. 6; pp. 5362 - 5377
Main Authors Tung, Chung-Pui, Wang, Ke-Wei, Ho, Ka-Wai, Chow, Jeff Po-Wa, Fan, John Wing-To, Chan, Wan-Tim, Chung, Henry Shu-Hung
Format Journal Article
LanguageEnglish
Published New York IEEE 01.06.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
AC–DC power conversion
Buck converters
Capacitors
Converters
Electric potential
Electromagnetic interference
Electronics
Filtering
flyback converter
Harmonic distortion
High voltages
Impedance
input filtering
Modules
power electronics
Power factor
power factor corrector (PFC)
Power harmonic filters
Power loss
Power semiconductor devices
power semiconductor filter
rectifiers
total harmonic distortion (THD)
Voltage control
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Abstract A flyback power factor corrector (PFC) using a series-pass module (SPM) to shape its input current is presented. The input current is profiled by the SPM with its waveform controlled to be in the same wave shape and phase with the supply voltage and its magnitude controlled to regulate the output voltage. The SPM is constructed by two series-connected power semiconductor devices in a cascode structure. One of them is a high-voltage device of low on -state resistance for sharing major voltage stress, while the other one is a low-voltage device with high-output impedance for profiling the current through the SPM. The SPM has a local control for clamping the voltage across the low-voltage device. Such arrangement allows the PFC to exhibit lower total input current harmonic distortion than that using a single high-voltage series-pass device. To minimize power loss, the operating point of the low-voltage device is regulated around the boundary between its high-gain and fully turn- on operating region by adjusting the duty cycle of the main switch in the flyback converter. A 100-W 85-265-Vac/36-Vdc prototype has been built and evaluated. The conducted electromagnetic interference under different supply voltages will also be given.
AbstractList A flyback power factor corrector (PFC) using a series-pass module (SPM) to shape its input current is presented. The input current is profiled by the SPM with its waveform controlled to be in the same wave shape and phase with the supply voltage and its magnitude controlled to regulate the output voltage. The SPM is constructed by two series-connected power semiconductor devices in a cascode structure. One of them is a high-voltage device of low on -state resistance for sharing major voltage stress, while the other one is a low-voltage device with high-output impedance for profiling the current through the SPM. The SPM has a local control for clamping the voltage across the low-voltage device. Such arrangement allows the PFC to exhibit lower total input current harmonic distortion than that using a single high-voltage series-pass device. To minimize power loss, the operating point of the low-voltage device is regulated around the boundary between its high-gain and fully turn- on operating region by adjusting the duty cycle of the main switch in the flyback converter. A 100-W 85–265-Vac/36-Vdc prototype has been built and evaluated. The conducted electromagnetic interference under different supply voltages will also be given.
Author Chow, Jeff Po-Wa
Fan, John Wing-To
Tung, Chung-Pui
Ho, Ka-Wai
Chan, Wan-Tim
Chung, Henry Shu-Hung
Wang, Ke-Wei
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Snippet A flyback power factor corrector (PFC) using a series-pass module (SPM) to shape its input current is presented. The input current is profiled by the SPM with...
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SubjectTerms AC–DC power conversion
Buck converters
Capacitors
Converters
Electric potential
Electromagnetic interference
Electronics
Filtering
flyback converter
Harmonic distortion
High voltages
Impedance
input filtering
Modules
power electronics
Power factor
power factor corrector (PFC)
Power harmonic filters
Power loss
Power semiconductor devices
power semiconductor filter
rectifiers
total harmonic distortion (THD)
Voltage control
Title Flyback PFC With a Series-Pass Module in Cascode Structure for Input Current Shaping
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