Electric power conversion systems – Frequency conversion without intermediate conversion to d.c. – By semiconductor converter
Patent
1997-09-29
1999-09-07
Wong, Peter S.
Electric power conversion systems
Frequency conversion without intermediate conversion to d.c.
By semiconductor converter
363 56, 363160, H02M 520, H02M 2257, H02H 7122
Patent
active
059496720
ABSTRACT:
A three-phase matrix converter for converting AC voltages of predetermined amplitude and frequency into AC voltages of any amplitude and frequency and a method for operating the same, include four-segment switches as main switches which are combined into three switch groups. A resonance capacitance is connected in parallel with each main switch, or an output capacitance of power semiconductors of the main switches acts as a resonance capacitance. An auxiliary commutation device which is provided between three-phase output connections of each switch group has an auxiliary switch constructed as a four-segment switch and a resonance inductance connected in series therewith.
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patent: 4833588 (1989-05-01), Schauder
patent: 5594636 (1997-01-01), Schauder
patent: 5642273 (1997-06-01), Lai et al.
patent: 5710698 (1998-01-01), Lia et al.
ABB Patent GmbH
Greenberg Laurence A.
Lerner Herbert L.
Patel Rajnikant B.
Wong Peter S.
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