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US 2010/0164429 A1Published application
Inverter control apparatus
AssigneeKabushiki Kaisha Yaskawa Denki
InventorKozo IDE
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Abstract
An inverter control apparatus includes: a state estimator that calculates an estimated current vector and an estimated magnetic flux vector from a motor command voltage vector, a detected current vector, and a motor parameter; a correction voltage calculator that calculates a correction voltage vector on the basis of a current error between the detected current vector and the estimated current vector; and a correction voltage unit that adds the correction voltage vector to the motor command voltage vector.
Claims6
An inverter control apparatus comprising:
- an inverter unit that applies a voltage to an induction motor on the basis of a command voltage vector that is obtained such that a command current vector agrees with a detected current vector;
- a state estimator that estimates and calculates a current vector, a magnetic flux vector, and a magnetic flux phase of the induction motor on the basis of the detected current vector, the command voltage vector, and a motor parameter;
- an error current calculator that calculates an error current vector between the detected current vector and the estimated current vector;
- an error current converter that vector-converts the error current vector by using the magnetic flux phase;
- a correction voltage calculator that calculates a correction voltage vector by using the vector-converted error current vector and the command current vector;
- and
- a correction voltage unit that adds the correction voltage vector to the command voltage vector, and inputs the resultant vector to the state estimator.
4 more elements
Dependencies are inferred from the claim text.