CONTROL METHOD FOR PRIMARY VOLTAGE OF INDUCTION MOTOR

PURPOSE:To equalize the currents of each phase, and to reduce an adverse effect on a power supply or induction motors by connecting the power supply side so that the phase sequences of induction motors are made to differ when a plurality of the induction motors are started or operated simultaneously...

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Bibliographic Details
Main Author FURUTA KATSUMI
Format Patent
LanguageEnglish
Published 06.06.1989
Subjects
CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS
CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
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Summary:PURPOSE:To equalize the currents of each phase, and to reduce an adverse effect on a power supply or induction motors by connecting the power supply side so that the phase sequences of induction motors are made to differ when a plurality of the induction motors are started or operated simultaneously. CONSTITUTION:A first motor 3 is connected to the power supply side so that phase sequences are brought to R S T, a second motor 4 so that phase sequences are brought to S T R and a third motor 5 so that phase sequences are brought to T R S. Accordingly, phase to which a thyristor 1 is not connected is made to differ at every motor 3-5 and a main circuit is connected, thus resulting in no concentration to the same phase of currents flowing through a power supply and distribution to each phase when the induction motors 3-5 are started or operated simultaneously.
Bibliography:Application Number: JP19870299372