Adjusting gate pulse time intervals for reflected wave...

Electricity: motive power systems – Induction motor systems – Primary circuit control

Reexamination Certificate

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C318S810000, C318S811000

Reexamination Certificate

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07034501

ABSTRACT:
Methods and apparatus for controlling switching in a DC-to-AC inverter to prevent overvoltages applied to an AC motor by determining the switching order of the phase voltage signals, providing gating signals at switching intervals by modulating a carrier wave with the phase voltage signals, comparing the switching intervals to a predetermined minimum time interval sufficient for reflected wave transients to dissipate, and adjusting the switching intervals to be at least equal to the predetermined minimum time interval.

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patent: 4720777 (1988-01-01), Yokoi
patent: 4722042 (1988-01-01), Asano et al.
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patent: 5912813 (1999-06-01), Kerkman et al.
patent: 5990654 (1999-11-01), Skibinski et al.
patent: 6014497 (2000-01-01), Kerkman et al.
patent: 6324085 (2001-11-01), Kimura et al.
patent: 6541933 (2003-04-01), Leggate et al.

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