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Converter control device and air conditioner including converter control device
US8941347B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8941347-B2 |
| Application number | US-201313845286-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 18, 2013 |
| Priority date | Apr 12, 2012 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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A converter control device comprises: a voltage-zero-cross detection unit detecting zero cross of the alternate-current voltage and outputting a voltage zero-cross signal; a power-source-current detection unit detecting a power source current of the alternate-current power source; a bus-line-voltage detection unit detecting a bus-line voltage between terminals of the smoothing capacitor; a PWM-signal generation unit generating a PWM-signal for on/off-controlling the switching unit, based on the power-source current, the bus-line voltage and a bus-line-voltage command value as a target voltage of the bus-line voltage; a power-source voltage-state detection unit detecting a signal state of the alternate-current voltage based on the voltage zero-cross signal; and a fundamental-switching-frequency selection unit selecting a fundamental switching frequency of the PWM-signal based on the signal state of the alternate-current voltage. The PWM-signal generation unit generates the PWM-signal based on a fundamental switching signal having a fundamental switching frequency selected by the fundamental-switching-frequency selection unit.
First claim
Opening claim text (preview).
What is claimed is: 1. A converter control device controlling a converter main circuit that includes: a rectifying circuit that rectifies an alternate-current voltage from an alternate-current power source and outputs a direct-current voltage between direct-current bus lines; a smoothing capacitor that smoothes the direct-current voltage; a switching unit that is made from a semiconductor element and provided between the direct-current bus lines on a side closer to the power s…
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Electricity · mapped topic
- H02M1/4225Primary
Electricity · mapped topic
Electricity · mapped topic
Cross-Sectional Technologies · mapped topic
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Frequently asked questions
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- What does patent US8941347B2 cover?
- A converter control device comprises: a voltage-zero-cross detection unit detecting zero cross of the alternate-current voltage and outputting a voltage zero-cross signal; a power-source-current detection unit detecting a power source current of the alternate-current power source; a bus-line-voltage detection unit detecting a bus-line voltage between terminals of the smoothing capacitor; a PWM-…
- Who is the assignee on this patent?
- Otorii Yu, Saito Katsuhiko, Fukuda Masahiro, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification H02M1/4225. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 27 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).