Motor Controlling method and apparatus thereof
First Claim
1. A motor controlling method configured to calculate information for a rotor position using a current and voltage applied to a motor and instrument constants of the motor, and control the voltage or current applied to the motor based upon the calculated information, the method comprising:
- reducing the affection of an error of the instrument constants of the motor, or an error of a sensor for detection of the current, voltage based upon a characteristic property of a load.
1 Assignment
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Accused Products
Abstract
A voltage detection section and current detection section detect a voltage and current supplied to a motor, and the detected voltage and current are supplied to a position detection section. An angular speed output from the position detection section is supplied to a differentiator to output an angular acceleration. A fundamental wave component extraction section extracts a fundamental wave component of the angular acceleration, and the extracted fundamental wave component is supplied to an amplitude adjustment section. The output of the amplitude adjustment section is subtracted from the average current command by a subtraction section. This subtraction result, current detection value, and the rotor position from the position detection section are supplied to a current control section to carry out the current control operation so as to obtain a current command. The current command is supplied to an inverter to control the voltage and current so as to suppress the speed changing due to the load torque changing. Thus, stability is improved, and a decrease in cost is realized.
32 Citations
10 Claims
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1. A motor controlling method configured to calculate information for a rotor position using a current and voltage applied to a motor and instrument constants of the motor, and control the voltage or current applied to the motor based upon the calculated information, the method comprising:
reducing the affection of an error of the instrument constants of the motor, or an error of a sensor for detection of the current, voltage based upon a characteristic property of a load. - View Dependent Claims (2, 3, 4, 5)
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6. A motor controlling apparatus configured to calculate information for a rotor position using a current and voltage applied to a motor and instrument constants of the motor, and control the voltage or current applied to the motor based upon the calculated information, the apparatus comprising:
an affection reduction device configured to reduce the affection of an error of the instrument constants of the motor, or an error of a sensor for detection of the current, voltage based upon a characteristic property of a load. - View Dependent Claims (7, 8, 9, 10)
Specification