動態電壓恢復器

專利類型

發明

專利國別 (專利申請國家)

中華民國

專利申請案號

104131719

專利證號

I 579676

專利獲證名稱

動態電壓恢復器

專利所屬機關 (申請機關)

國立虎尾科技大學

獲證日期

2017/04/21

技術說明

本發明關於一種動態電壓恢復器。此動態電壓恢復器採用先將所輸入的交流電進行降壓，之後，交流對交流轉換器根據正常交流電的振幅與輸入的降壓後之交流電的振幅，配合變壓器，針對輸入的交流電壓之電壓驟降以及電壓突升，給予對應之正增益之電壓補償。而在本發明的交流對交流轉換器中，採用單向全橋轉換器，先將所接收的降壓後之交流電進行全波整流，才以脈波寬度調變方式，完成交流轉換。而本發明的全橋轉換器經由低頻變壓器與輸入電壓串聯達到電壓補償穩定輸出功能。 A dynamic voltage restorer (DVR) is provided in the present invention. The DVR adopts to reach the step down the input AC voltage with auto-transformer. And then, the AC-AC converter provides a positive gain to the input AC voltage according to the amplitude of the standard AC voltage and the reduced amplitude of the AC input voltage. Therefore, the voltage sag and swell are compensated with the transformer. Further, a single direction full-bridge converter is adopted in the AC-AC converter of the present invention. The Full-wave rectification is performed to the received input AC voltage with reduced amplitude, and then the sequential PWM is performed to convert AC voltage. The AC voltage generated by the AC-AC converter is connected to the input AC voltage in series by the low frequency transformer such that the voltage compensation and output stabilization are achieved.

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