HIGHLY STABLE POWER-SUPPLY USING DIGITALLY CONTROLLED PHASE-CONTROLLED RECTIFIER AND ACTIVE-FILTER
SCIE
SCOPUS
- Title
- HIGHLY STABLE POWER-SUPPLY USING DIGITALLY CONTROLLED PHASE-CONTROLLED RECTIFIER AND ACTIVE-FILTER
- Authors
- KWON, BH; SONG, EH
- Date Issued
- 1994-09
- Publisher
- IEE-INST ELEC ENG
- Abstract
- A design of a highly stable current-controlled power supply combining a phase-controlled rectifier (PCR), passive filter and active filter is investigated. A digital phase-locked voltage control (PLVC) with a capability of compensating the thyristor firing angles under an unbalanced power source is proposed; otherwise the PCR output voltage has low-order subharmonics whose suppression requires a bulky passive filter. The digital PLVC has a fast dynamic characteristic as an inner control loop of the PCR. To suppress further the output ripple, an active filter using a transformer is introduced and its design is described through a frequency-domain analysis. An optimal, proportional and measurable-variable feedback (IPM) controller is designed using a time-weighted performance index based on a time-domain analysis. The design method based on the time-weighted performance index gives a better response characteristic than that based on the conventional performance index. It is shown via experimental results that the proposed scheme gives good dynamic and static performance.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/21917
- DOI
- 10.1049/ip-epa:19941081
- ISSN
- 1350-2352
- Article Type
- Article
- Citation
- IEE PROCEEDINGS-ELECTRIC POWER APPLICATIONS, vol. 141, no. 5, page. 221 - 228, 1994-09
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