MOTOR DRIVE APPARATUS AND MOTOR DRIVE METHOD

PROBLEM TO BE SOLVED: To perform vector control having excellent control performance. SOLUTION: A motor drive apparatus is provided with an A/D converter 30 which obtains motor currents flowing in respective phases of a motor 200 to output a first motor current that is A/D-converted, an arithmetic u...

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Bibliographic Details
Main Author OGUSHI TOSHIAKI
Format Patent
LanguageEnglish
Published 24.02.2011
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 perform vector control having excellent control performance. SOLUTION: A motor drive apparatus is provided with an A/D converter 30 which obtains motor currents flowing in respective phases of a motor 200 to output a first motor current that is A/D-converted, an arithmetic unit 10 which generates a second motor current from the first motor current, obtains a first motor voltage based on the second motor current, a motor parameter and a desired rotational angular speed and generates a second motor voltage from the first motor voltage, and a PWM generator 20 which generates a PWM signal for driving the motor 200 based on the second motor voltage. The arithmetic unit 10 is provided with a parameter estimator 14 which calculates a motor resistance and a motor inductance based on a maximum peak value and a minimum peak value of the second motor current in a DC excitation control state, and calculates a motor inductive voltage constant based on the second motor current in a forced commutation control state, and the calculated motor resistance and motor inductance. COPYRIGHT: (C)2011,JPO&INPIT
Bibliography:Application Number: JP20090183626