Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2007-05-22
2007-05-22
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S727000, C318S767000, C318S800000, C318S811000
Reexamination Certificate
active
10495854
ABSTRACT:
The invention is directed to controlling an electric motor by means of a frequency converter. The frequency converter can be connected to one of several different mains voltages. According to the present invention, the maximum output power of the frequency converter, is limited when the actual mains voltage is lower than the maximum nominal mains voltage, for which the frequency converter is designed, and during the limitation the frequency converter controls the speed of the motor within a power range up to a limited maximum output power. This gives a genuine multi-voltage unit, which can be connected to a wide range of mains voltages.
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A. Boglietti et al., “Electrical Drives to Increase the Fluid Processing Efficiency”, © 2001 IEEE, pp. 1147-1154, Dipartimento di Ingegneria Elettrica Industriale, Politecnico di Torino, C.so Duca degll Abruzzi, 24-10124 Torino, Italy.
Aupke Andreas
Harvest Nils-Ole
Krogh Egon
Skaug Kenneth
Toennes Michael
Danfoss Drives A/S
Donovan Lincoln
McCormick Paulding & Huber LLP
Smith Tyrone
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