MOTOR DRIVE CIRCUIT AND MOTOR DRIVE SYSTEM

PROBLEM TO BE SOLVED: To provide a motor drive circuit capable of improving controllability of the number of rotations of a motor.SOLUTION: A motor drive circuit comprises: a first port receiving a rotation command signal that defines the number of rotations of a motor; a first measuring circuit mea...

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Bibliographic Details
Main Authors OGUSHI TOSHIAKI, HARA TAKEHIRO
Format Patent
LanguageEnglish
Published 17.06.2013
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:PROBLEM TO BE SOLVED: To provide a motor drive circuit capable of improving controllability of the number of rotations of a motor.SOLUTION: A motor drive circuit comprises: a first port receiving a rotation command signal that defines the number of rotations of a motor; a first measuring circuit measuring the rotation command signal; a second port receiving a first setting signal; a second measuring circuit measuring the first setting signal; a duty calculation circuit calculating duty corresponding to the measured rotation command signal on the basis of characteristics defining the relationship between the rotation command signal and a PWM signal, and outputting a duty information signal according to the calculated duty; and a motor-drive-waveform control circuit generating the PWM signal having the calculated duty on the basis of the duty information signal and outputting the signal.
Bibliography:Application Number: JP20110268064