发明名称 |
THREE-PHASE POWER CONVERSION DEVICE |
摘要 |
A three-phase power conversion device includes: single-phase inverters having AC output ends connected in series to the respective phases of the three-phase AC lines; a control device for performing PWM control for each single-phase inverter based on a voltage command V*; and an AC voltage detection circuit for detecting a phase and a voltage amplitude of three-phase AC voltage. The control device adds a zero-phase component Vo common to the three phases to a basic command Vx* for each phase to generate a voltage command V*. The zero-phase component Vo is generated by applying an amplitude a calculated based on the phase and the voltage amplitude to reference zero-phase voltage Voo that has been set, thereby reducing a peak of the voltage command V* for each single-phase inverter. |
申请公布号 |
US2015357937(A1) |
申请公布日期 |
2015.12.10 |
申请号 |
US201314758668 |
申请日期 |
2013.11.25 |
申请人 |
MITSUBISHI ELECTRIC CORPORATION |
发明人 |
TAKAHARA Takaaki;KONDO Ryota;MURAKAMI Satoshi;YAMADA Masaki |
分类号 |
H02M7/537 |
主分类号 |
H02M7/537 |
代理机构 |
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代理人 |
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主权项 |
1. A three-phase power conversion device comprising:
single-phase inverters each including a DC capacitor and a plurality of semiconductor switching elements, the single-phase inverters having AC output ends connected in series to respective phases of three-phase AC lines; and a control device for performing PWM control for each single-phase inverter based on a voltage command, the three-phase power conversion device further comprising an AC voltage detection circuit for detecting a phase and voltage of three-phase AC voltage from the three-phase AC lines, wherein the control device includes a voltage command generating section for, based on the phase and the voltage from the AC voltage detection circuit, adding a zero-phase component common to the three phases to a basic command for each phase to generate the voltage command, and the voltage command generating section determines an amplitude of the zero-phase component so that a magnitude of a peak of the voltage command becomes smaller than a maximum absolute value of the basic command for each phase, and applies the amplitude to reference zero-phase voltage set in advance, to determine the zero-phase component synchronized with the phase of the three-phase AC voltage. |
地址 |
Chiyoda-ku, Tokyo JP |