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A Novel Active Damping Control of a Three-phase PWM Inverter with LC Filter

Title
A Novel Active Damping Control of a Three-phase PWM Inverter with LC Filter
Author
현동석
Keywords
Three-phase PWM inverter; Field oriented control; LC filter; Active damping control; All pass filter
Issue Date
2015-06
Publisher
KOREAN INST ELECTR ENG
Citation
JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY, v. 10, NO 4, Page. 1589-1596
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 2nd order low pass filter(2nd LPF) which has a zero damping ratio. A simple method of implementing 2nd LPF with damping ratio is to add resistor to inductor or capacitor of LC filter. In an industrial application, it is not practical to adopt damping resistor because it results in losses being proportional to square of current flowing through resistor. Instead of using damping resistors, the proposed active damping control(ADC) utilizes all pass filter(APF) and considers inherent processing delay of digital controller. The overall transfer function of the proposed method is the same as a 2nd LPF and its damping ratio is also controllable via control variables. Detailed design and implementation of controller is also presented. Experiments are conducted with a 7.5kVA induction motor drive system controlled by PWM converter and inverter. Test waveforms are also presented to verify the proposed LC filter control algorithm.
URI
http://koreascience.or.kr/article/ArticleFullRecord.jsp?cn=E1EEFQ_2015_v10n4_1589http://hdl.handle.net/20.500.11754/25399
ISSN
1975-0102; 2093-7423
DOI
10.5370/JEET.2015.10.4.1589
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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