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Switching power supply including power factor correction circuit with polarity determination control
US8934273B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8934273-B2 |
| Application number | US-201213605479-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 6, 2012 |
| Priority date | Sep 27, 2011 |
| Publication date | Jan 13, 2015 |
| Grant date | Jan 13, 2015 |
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- Title
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Abstract
Official abstract text for this publication.
The present invention relates to a PFC switching power supply which can perform polarity determination and voltage detection of AC voltage without using a DC isolator such as a transformer. Included are: a power factor correction section which rectifies AC voltage inputted, outputs DC voltage to a load and corrects a power factor; an input voltage detecting section which outputs L pole detected voltage and N pole detected voltage; and a switching controller which controls the operation of the power factor correction section. An AC waveform generating section of the switching controller generates an AC waveform. The switching controller generates a drive pulse having a frequency and a duty ratio varying depending on AC waveform, whereby a predetermined level of the DC output of the power factor correction section is maintained and in addition, the power factor is corrected.
First claim
Opening claim text (preview).
What is claimed is: 1. A switching power supply comprising: an input section connected to an AC power line; a power factor correction section which rectifies AC voltage inputted to the input section, outputs DC voltage to a load and in addition, corrects a power factor; an input voltage detecting section which outputs L (live) pole detected voltage corresponding to L pole voltage of the input section and N (neutral) pole detected voltage corresponding to N pole voltage of the…
Assignees
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Classifications
Electricity · mapped topic
Electricity · mapped topic
- H02M1/4208Primary
Electricity · mapped topic
Cross-Sectional Technologies · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US8934273B2 cover?
- The present invention relates to a PFC switching power supply which can perform polarity determination and voltage detection of AC voltage without using a DC isolator such as a transformer. Included are: a power factor correction section which rectifies AC voltage inputted, outputs DC voltage to a load and corrects a power factor; an input voltage detecting section which outputs L pole de…
- Who is the assignee on this patent?
- Chalermboon Nadthawut, Nakamura Yoshihiro, Minebea Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H02M1/4208. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 13 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).