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US 2014/0232308 A1Published application
Inverter apparatus
AssigneeMitsubishi Heavy Industries Automotive Thermal Systems Co., Ltd.
InventorsKyohei Watanabe, Kenichi Aiba, Takayuki Takashige
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Abstract
An object of the present invention is to achieve stable inverter control by means of current detection using one current sensor in all of periods in which overmodulation control is performed. An inverter controller includes a γ-axis current calculation section that holds, in advance, a γ-axis current arithmetic expression including a direct current as a parameter, and calculates a γ-axis current using a direct current detected by a current sensor for the γ-axis current arithmetic expression.
Claims11
An inverter apparatus comprising:
- an inverter that converts a direct-current voltage input via a direct-current bus into three phase alternating voltages and outputs the three phase alternating voltages to a motor;
- an inverter control unit that controls the inverter;
- and
- a current detection unit that detects the direct current flowing in the direct-current bus,
- wherein the inverter control unit includes a first current calculation section that holds, in advance, a γ-axis current arithmetic expression including the direct current as a parameter, and calculates a γ-axis current using the direct current detected by the current detection unit for the γ-axis current arithmetic expression.
2 more elements
Dependencies are inferred from the claim text.