Supression of cross current in a plural converter system
AssigneeToshiba Mitsubishi-Electric Industrial Systems Corporation
InventorsShunsuke Tobayashi, Hiromitsu Suzuki
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Abstract
A power conversion system that has two power conversion apparatuses each including a converter that can control a DC voltage and an inverter and that drives the AC motor by connecting the outputs of the two inverters in parallel is provided. The output voltage of one of the converters is controlled according to the difference between the detection currents detected by the two current detectors for detecting the output currents of the two inverters so that a cross current flowing through the two inverters is suppressed.
Claims12
A power conversion system for driving an AC motor, comprising:
- a first power conversion apparatus including a first converter configured to control a DC voltage and a first inverter;
- a second power conversion apparatus including a second converter configured to control a DC voltage and a second inverter, wherein
- outputs of the first inverter and the second inverter are connected in parallel via a coupling reactor, and
- a DC output voltage of any one of the first converter and the second converter is controlled in accordance with a difference between a first detection current detected by a first current detector detecting an output current of the first inverter and a second detection current detected by a second current detector detecting an output current of the second inverter to suppress a cross current flowing between the first inverter and the second inverter.
Dependencies are inferred from the claim text.