Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Running-speed control
Patent
1994-06-09
1999-12-14
Wysocki, Anthony
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Running-speed control
H02P 700
Patent
active
060022183
ABSTRACT:
A control device for controlling a plurality of motors of an air conditioner comprises a plurality of power circuits each for supplying a corresponding DC voltage to drive a respective motor. Motor driving circuits, each having a plurality of switches, supply the DC voltage from a corresponding power circuit as an AC voltage to windings of the corresponding motor. A rotational position of each corresponding motor is detected, and a position detecting signal is generated dependent thereon. Switch driving circuits, each receptive of a corresponding driving signal, drives the plurality of switches of each corresponding motor driving circuit. A single microcomputer controls the rotation of each of the plurality of motors by generating the plurality of driving signals. Each driving signal is dependent on a respective position detecting signal to drive the plurality of switches of each corresponding motor driving circuit so that the DC voltage from each power circuit is converted and supplied as an AC voltage to the windings depending on the rotational position of each corresponding motor.
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Ogawa Yoshio
Toda Koichi
Fujitsu General Limited
Wysocki Anthony
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