Direct current estimation device, power conversion device, and direct current estimation method
AssigneeHitachi Astemo, Ltd.
InventorTakashi NAKAZAWA
Life of this patent
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Abstract
A direct current estimation device that estimates a value of a direct current in a power conversion device that converts a direct current into an alternating current and outputs the alternating current to a dynamo-electric machine includes a Kalman filter that estimates a direct current estimation value, and the direct current estimation device uses at least an observation value of the alternating current and an angular velocity observation value of the dynamo-electric machine as input signals to the Kalman filter.
Claims4
A direct current estimation device that estimates a value of a direct current in a power conversion device that converts the direct current into an alternating current and outputs the alternating current to a dynamo-electric machine, the direct current estimation device comprising
- a Kalman filter that estimates a direct current estimation value,
- wherein the direct current estimation device uses at least an observation value of the alternating current and an angular velocity observation value of the dynamo-electric machine as input signals to the Kalman filter.
A direct current estimation method in a power conversion device that converts a direct current into an alternating current and outputs the alternating current to a dynamo-electric machine, the method comprising:
- inputting at least an observation value of the alternating current and an angular velocity observation value of the dynamo-electric machine to a Kalman filter as input signals;
- and
- performing a Kalman filter operation based on the input signals to estimate a value of the direct current.
Dependencies are inferred from the claim text.