Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Running-speed control
Reexamination Certificate
2007-01-16
2007-01-16
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Running-speed control
C318S254100, C318S799000, C318S801000, C318S803000, C318S132000, C318S434000, C363S034000, C363S037000, C363S067000
Reexamination Certificate
active
10788994
ABSTRACT:
A variable speed drive is provided having a converter to convert an AC voltage to a DC voltage, a DC link to filter and store energy from the converter, and a plurality of inverters, wherein each inverter is configured to convert a DC voltage to an AC voltage to power a corresponding load connected to the inverter The converter is electrically connected to an AC power source, the DC link is electrically connected to the converter, and the plurality of inverters are electrically connected in parallel to the DC link. Each inverter of the plurality of inverters is configured to operate substantially independently of other inverters of the plurality of inverters.
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Murphy, J.M.D., “Thyristor Control of A.C. Motors”, Principles of Variable-Frequency A.C. Drives, Oct. 10, 1975, pp. 3-4, 111-114, & 120-121, Pergamon Press, New York.
Federman Israel
Schnetzka Harold Robert
Donovan Lincoln
McNees Wallace & Nurick LLC
Smith Tyrone
York International Corp.
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