Power factor corrected 3-phase Ac-dc power converter using natural modulation
First Claim
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1. A 3-phase pfc ac-dc power converter comprisinga 3-phase boost converter,a first control circuit for operating the 3-phase boost converter at “
- 0% duty-ratio”
, such thatwhere X is a phase angle of a 3-phase sine wave voltage,a phase A boost duty-ratio Dboosta is approximately
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Abstract
A 3-phase pfc 100% duty-ratio buck converter and a 3-phase 0% duty-ratio boost converter can be used in parallel with their outputs in series to greatly reduce the ripple voltage in the output. They can also be used in series with their outputs in parallel to greatly reduce the ripple current in the output. A 3-phase 0% duty-ratio boost converter having isolated primary circuits for each phase is used when the inputs are in series.
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Citations
2 Claims
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1. A 3-phase pfc ac-dc power converter comprising
a 3-phase boost converter, a first control circuit for operating the 3-phase boost converter at “ - 0% duty-ratio”
, such thatwhere X is a phase angle of a 3-phase sine wave voltage, a phase A boost duty-ratio Dboosta is approximately
- 0% duty-ratio”
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2. A 3-phase pfc ac-dc power converter comprising
a 3-phase boost converter, a first control circuit for operating the 3-phase boost converter-at “ - 0% duty-ratio,”
such that where X is a phase angle of a 3-phase sine wave voltage, a phase A boost duty-ratio Dboosta is approximately
- 0% duty-ratio,”
Specification
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Current AssigneeEdward Herbert
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Original AssigneeEdward Herbert
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InventorsHerbert, Edward
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Primary Examiner(s)Berhane, Adolf
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Application NumberUS12/618,740Time in Patent Office1,080 DaysField of Search363/65, 363/67, 363/69, 363/81, 363/124, 363/125, 363/71US Class Current363/69CPC Class CodesH02M 1/4216 operating from a three-phas...H02M 3/33592 having a synchronous rectif...H02M 3/3374 with preregulator, e.g. cur...Y02B 70/10 Technologies improving the ...Y02P 80/10 Efficient use of energy, e....
