Control of parallel operation of frequency converters or...

Details Control of parallel operation of frequency converters or... Control of parallel operation of frequency converters or...

2006-05-02

2006-05-02

Masih, Karen (Department: 2837)

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Running-speed control

C318S727000, C318S801000

Reexamination Certificate

active

07038405

ABSTRACT:
A method and a system for controlling parallel-connected frequency converters or inverter units feeding an alternating-current motor (MOTOR1) provided with parallel windings or separate parallel motors having their shafts mechanically coupled together via a load, in which method the current supplied to the motor is measured.The frequency converters/inverter units are connected to each other via a data bus, e.g. a fast serial bus, and one of the frequency converters/inverter units (FCON1or INU1) functions as a master device in such manner that it sends to the other device/devices (FCON2or INU2) information over the data bus regarding the instantaneous value of the current (IW1) fed by it to the motor, said other devices functioning as follower devices so that they adjust their own current (IW2) on the basis of the current of the master device.

REFERENCES:
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patent: WO-95/06373 (1995-03-01), None
“DriveIT Low Voltage AC Drive,” “Solution Products,” pp. 64-71, Oct. 24, 2002.

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