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Patent Searching and Data


Title:
POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/041111
Kind Code:
A1
Abstract:
Provided is a power conversion device that reduces the power capacity that is required of a power buffer circuit. A converter (3) performs full-wave rectification with respect to a single-phase voltage (Vin) and outputs a rectified voltage (Vrec) between direct current power supply lines (LL, LH). An inverter (5) receives the rectified voltage (Vrec) and supplies three-phase alternating current (Iu, Iv, Iw) to an inductive load (6). A power buffer circuit (4) is connected between the direct current power supply lines (LL, LH). The power buffer circuit (4) comprises a discharge circuit (4a) and a charging circuit (4b). The discharge circuit (4a) comprises a capacitor (C4) and a switch (Sc) connected in series. The charging circuit (4b) is configured, for example, from a step-up chopper and comprises a switch (Sl), a reactor (L4), and a diode (D40). One part of a power pulse that is input into the converter (3) is transferred between the direct current power supply lines (LL, LH) by the power buffer circuit (4).

Inventors:
SAKAKIBARA Kenichi
YAMASHITA Naoya
Application Number:
JP2014/073891
Publication Date:
March 26, 2015
Filing Date:
September 10, 2014
Export Citation:
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Assignee:
DAIKIN INDUSTRIES, LTD. (Umeda Center Building, 4-12 Nakazaki-Nishi 2-chome, Kita-ku, Osaka-sh, Osaka 23, 〒5308323, JP)
International Classes:
H02M7/48; H02M5/293
Foreign References:
JP2011193678A2011-09-29
JP2006166654A2006-06-22
JP2011193678A2011-09-29
JP2012135184A2012-07-12
Other References:
See also references of EP 3048718A4
IRIE; YAMASHITA; TAKEMOTO: "Ripple Compensation for a Single-Phase Rectifier by 2-Quadrant Chopper and Auxiliary Capacitor", THE INSTITUTE OF ELECTRICAL ENGINEERS OF JAPAN TRANSACTIONS D, vol. 112, no. 7, 1992, pages 623 - 629
OHNUMA; ITOH: "Circuit Configuration and Control Strategy of single-to-three Phase Power Converter with Active Buffer and Charge Circuit", THE 2010 ANNUAL MEETING OF THE INSTITUTE OF ELECTRICAL ENGINEERS OF JAPAN, 2010, pages 4 - 057
OHNUMA; ITOH: "Comparison between a Boost Chopper and an Active Buffer as a Single to Three Phase Converter", THE 2011 ANNUAL MEETING OF THE INSTITUTE OF ELECTRICAL ENGINEERS OF JAPAN, 2011, pages 4 - 042
HAGA; TAKAHASHI; OHISHI: "Unity Power Factor Operation Control Method For Single-phase to Three-phase Matrix Converter", THE INSTITUTE OF ELECTRICAL ENGINEERS OF JAPAN TRANSACTIONS D, vol. 124, no. 5, 2004, pages 510 - 516
Attorney, Agent or Firm:
YOSHITAKE,Hidetoshi et al. (10th floor, Sumitomo-seimei OBP Plaza Bldg.4-70, Shiromi 1-chome, Chuo-ku, Osaka-sh, Osaka 01, 〒5400001, JP)
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