Identification of DC-Link Capacitance for Single-Phase AC/DC PWM Converters

Title
Identification of DC-Link Capacitance for Single-Phase AC/DC PWM Converters
Author(s)
보성사[보성사]누옌탄하이[누옌탄하이]이동춘이석규
Keywords
ELECTROLYTIC CAPACITORS; PREDICTION; DRIVES
Issue Date
201005
Publisher
KOREAN INST POWER ELECTRONICS
Citation
JOURNAL OF POWER ELECTRONICS, v.10, no.3, pp.270 - 276
Abstract
In this paper, a capacitance estimation scheme for DC-link capacitors for single-phase AC/DC PWM converters is proposed. Under the no-load condition, a controlled AC current (30[Hz]) is injected into the input side, which then causes AC voltage ripples at the DC output side. Or, a controlled AC voltage can be directly injected into the DC output side. By extracting the AC voltage/current and power components on the DC output side using digital filters, the capacitance value can be calculated, where the recursive least squares (RLS) algorithm is used. The proposed methods can be simply implemented with software only and additional hardware is not required. From the experiment results, a high accuracy estimation of capacitances less than 0.85% has been obtained.
URI
http://hdl.handle.net/YU.REPOSITORY/22446
ISSN
1598-2092
Appears in Collections:
공과대학 > 전기공학과 > Articles
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