发明名称 |
Sine wave generation circuit and uninterruptible power supply system using the same |
摘要 |
A sine wave generation circuit and an uninterruptible power supply system (UPS) using the same, and more particularly, a sine wave generation circuit and a UPS using the same, which can output a sine wave for direct current (DC) power from a battery. In the UPS, a rectifier rectifies commercial alternating current (AC) power from an input terminal and converts the AC power into DC power. A charger charges a battery with the DC power. The battery provides the DC power. A DC-DC converter boosts and/or drops the DC power inputted from the battery by a predetermined level of the AC power. A D-class amplifier receives the DC power from the DC-DC converter and outputs a sine waveform power signal in response to a waveform control signal. A sine waveform controller controls a sine waveform generation operation of the D-class amplifier. A switching unit switches the commercial AC power from the input terminal to a load in a normal mode, and switches the sine waveform power signal from the D-class amplifier to the load when an error of the commercial AC power is detected.
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申请公布号 |
US7148586(B2) |
申请公布日期 |
2006.12.12 |
申请号 |
US20030688594 |
申请日期 |
2003.10.17 |
申请人 |
WORLD TOP TECHNOLOGY CO., LTD. |
发明人 |
LEE DONG-HYANG;LEE YEUNG-SOO |
分类号 |
H02J7/00;H02J9/00;H02J9/06;H02M7/48;H02M7/5387;H03F3/217 |
主分类号 |
H02J7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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