Title:
ELECTRICITY SUPPLY HAVING A HIGH DEGREE OF EFFICIENCY
Document Type and Number:
WIPO Patent Application WO2002095917
Kind Code:
A3
Abstract:
The invention relates to an electricity supply for converting a three-phase a.c. input voltage into a direct output voltage. The electricity supply for converting a three-phase a.c. input voltage (UR, US, UT) into a direct output voltage (UA) is characterised in that it has three switched-mode power supply units (SNR, SNS, SNT), of which each input end of a transformer (TRF) comprises a pulse-width controlled switch (V1, V2); a secondary rectifier (D1, D2) supplies the direct output voltage (UA) via a filter capacitor (C1); the current is controlled, upstream from the filter capacitor (C1), essentially according to a sine square function; each of the three switched-mode power supply units (SNR, SNS, SNT) is mounted on the input side on one of the three phases (R, S, T) of the three-phase system; and the direct voltage outputs of said power supply units are connected in parallel.
Inventors:
DRECHSLER EBERHARD (DE)
Application Number:
PCT/DE2002/001762
Publication Date:
June 19, 2003
Filing Date:
May 16, 2002
Export Citation:
Assignee:
SIEMENS AG (DE)
DRECHSLER EBERHARD (DE)
DRECHSLER EBERHARD (DE)
International Classes:
H02M3/337; (IPC1-7): H02M1/00; H02M1/12; H02M3/28
Foreign References:
| EP0595091A2 | 1994-05-04 | |||
| DE3641449A1 | 1988-06-09 | |||
| US4717833A | 1988-01-05 | |||
| DE4213096A1 | 1993-10-28 | |||
| US5164890A | 1992-11-17 | |||
| US4924170A | 1990-05-08 |
Other References:
HUI S Y R ET AL: "Modular development of single-stage 3-phase PFC using single-phase step-down converters", POWER ELECTRONICS SPECIALISTS CONFERENCE, 1998. PESC 98 RECORD. 29TH ANNUAL IEEE FUKUOKA, JAPAN 17-22 MAY 1998, NEW YORK, NY, USA,IEEE, US, 17 May 1998 (1998-05-17), pages 776 - 782, XP010294834, ISBN: 0-7803-4489-8
NISHIDA Y ET AL: "A simple three-phase boost-mode PFC rectifier", INDUSTRY APPLICATIONS CONFERENCE, 1996. THIRTY-FIRST IAS ANNUAL MEETING, IAS '96., CONFERENCE RECORD OF THE 1996 IEEE SAN DIEGO, CA, USA 6-10 OCT. 1996, NEW YORK, NY, USA,IEEE, US, 6 October 1996 (1996-10-06), pages 1056 - 1061, XP010201425, ISBN: 0-7803-3544-9
UNITRODE, XP002237544, Retrieved from the Internet [retrieved on 20030402]
NISHIDA Y ET AL: "A simple three-phase boost-mode PFC rectifier", INDUSTRY APPLICATIONS CONFERENCE, 1996. THIRTY-FIRST IAS ANNUAL MEETING, IAS '96., CONFERENCE RECORD OF THE 1996 IEEE SAN DIEGO, CA, USA 6-10 OCT. 1996, NEW YORK, NY, USA,IEEE, US, 6 October 1996 (1996-10-06), pages 1056 - 1061, XP010201425, ISBN: 0-7803-3544-9
UNITRODE, XP002237544, Retrieved from the Internet
Download PDF: