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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 1992.4
- 수록면
- 452 - 463 (12page)
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초록· 키워드
오류제보하기
In railway traction the three-phase drive system with inverter-fed Induction motors has asserted itself, with 1100 locomotives and even more suburban cars running. While the first vehicles were equipped with forced-commutated thyristor Inverters and open-loop slip-frequency control, the recent standard are self-turn-off power devices as GTOs, and highly advanced field-oriented or direct control of torque and flux.
The new unsymmetrical snubber circuit for high-power GTOs reduced inverter losses to 50%, weight to some 25% within the last 20 years.For a.c. overhead supply the self-commutated line-side converter 1s now standard; re-grouping 1t as step-up choppers for operation under d.c. line opens new economic solutions for multi-system vehicles. Modern cooling technologies are explained, recent examples for European very high power applications given.
With the increasing capability of the Inverters the demands on the control system grew, too; best suited for traction Inverters seems Direct Self Control using the restricted switching frequency best, yet allowing time-optimal torque control.
The new unsymmetrical snubber circuit for high-power GTOs reduced inverter losses to 50%, weight to some 25% within the last 20 years.For a.c. overhead supply the self-commutated line-side converter 1s now standard; re-grouping 1t as step-up choppers for operation under d.c. line opens new economic solutions for multi-system vehicles. Modern cooling technologies are explained, recent examples for European very high power applications given.
With the increasing capability of the Inverters the demands on the control system grew, too; best suited for traction Inverters seems Direct Self Control using the restricted switching frequency best, yet allowing time-optimal torque control.
목차
ABSTRACT
INTRODUCTION
DRIVE SCHEMES
THE FORCED-COMMUTATED THYRISTOR INVERTER
ADVANTAGES OF SELF-TURN-OFF DEVICES
THYRISTOR OR TRANSISTOR?
GTO THYRISTORS FOR TRACTION
SWITCHING RELIEF CIRCUITS
THE R C D - SNUBBER ARRANGEMENT
THE UNSYMMETRICAL SNUBBER ARRANGEMENT
THE THREE-LEVEL INVERTER
MULTI-SYSTEM ELECTRIC LOCOMOTIVES
COOLING AND CONSTRUCTION ASPECTS
EXAMPLES OF TRACTION CONVERTER
INVERTER CONTROL SYSTEM
SLIP-FREQUENCY OPEN-LOOP-CONTROL WITH CURRENT AMPLITUDE CONTROL
FIELD-ORIENTATED CONTROL
DIRECT SELF CONTROL (DSC)
CONCLUSION
REFERENCES
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