정현파 출력 필터를 가지는 3상 PWM 인버터 제어 기법

Title
정현파 출력 필터를 가지는 3상 PWM 인버터 제어 기법
Other Titles
A Novel Control Algorithm of a Three-phase PWM Inverter with LC Filter
Authors
현동석
Keywords
Three-phase inverter; PWM; LC filter; FOC; Pulse Width Modulation; Field Oriented Control
Issue Date
2015-06
Publisher
전력전자학회(The Korean Institute of Power Electronics)
Citation
전력전자학회 논문지( The Transactions of the Korean Institute of Power Electronics), v. 20, NO 3, Page. 239-246
Abstract
A novel control method of a three-phase PWM inverter with LC filter is proposed. The transfer function of LC filter is the same as that of second-order low pass filter(LPF) , which has a zero damping ratio. A simple method of implementing second-order LPF with damping ratio is to add a resistor in an LC circuit. However, in a real power system, adopting damping resistors is impractical because it results in losses proportional to the square of the current flowing through the resistors. Instead of inserting resistors, the proposed control strategy utilizes the measured capacitor voltages to control the oscillation of LC circuit. The overall transfer function of the proposed method is the same as a second-order LPF, and its damping ratio is controllable via control variables. The current controller can have overshoots caused by LC filter. Improved current controller is implemented by an equivalent second-order of LC filter. A 7.5 kVA PWM converter and a PWM inverter with a 5.5 kW induction motor are set up to verify the proposed control algorithm. Test waveforms are also presented to verify the proposed LC filter control algorithm.
URI
http://koreascience.or.kr/article/ArticleFullRecord.jsp?cn=JRJJC3_2015_v20n3_239http://hdl.handle.net/20.500.11754/25707
ISSN
1229-2214; 2288-6281
DOI
http://dx.doi.org/10.6113/TKPE.2015.20.3.239
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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