Electric power conversion systems – Frequency conversion without intermediate conversion to d.c. – By semiconductor converter
Patent
1994-06-29
1997-01-14
Hecker, Stuart N.
Electric power conversion systems
Frequency conversion without intermediate conversion to d.c.
By semiconductor converter
363159, H02M 520, H02M 5257
Patent
active
055946364
ABSTRACT:
A method and apparatus for AC-to-AC power conversion wherein commutation from one switch in a switching group to a second switch is effected while both switches are enabled simultaneously without causing a short circuit between the phase input lines associated with each respective switch. Each switch in a switching group is bidirectional and polarity-controlled, and may be selectively enabled to conduct only negative-polarity or positive-polarity current, or may be disabled. An overvoltage clamping circuit is also provided with each switch. A switch gating control circuit is employed to provide selective operation of the switches in a particular switch group.
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Charles L. Neft and Colin D. Schauder, "Theory and Design of a 30-hp Matrix Converter", IEEE Transactions of Industry Applications, vol. 28, No. 3, May/Jun. 1992.
Florenzo Philip A.
Hecker Stuart N.
Northrop Grumman Corporation
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