发明名称 |
Motor control system for centrifugal machine |
摘要 |
A power control apparatus for controlling power supplied to an electric motor rotating a rotor employed in a centrifuge is provided. The power control apparatus includes first and second inverters and a smoothing capacitor disposed between the first and second inverters. In a motor power mode, the first inverter charges the smoothing capacitor with power supplied by an AC power supply, while the second inverter charges, in a motor braking mode, the smoothing capacitor with power regenerated by the motor during a braking operation for returning the regenerated power back to the AC power supply through the first inverter. An reactor is arranged between the AC power supply and the first inverter for reducing harmonic components contained in the current supplied from or back to the AC power supply.
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申请公布号 |
US5731681(A) |
申请公布日期 |
1998.03.24 |
申请号 |
US19970800902 |
申请日期 |
1997.02.12 |
申请人 |
HITACHI KOKI CO., LTD. |
发明人 |
INANIWA, MASAHIRO;KIDO, NOBUHARU;FUJIMAKI, TAKAHIRO;WATANABE, SHINJI;MATSUFUJI, NORIYASU;TOBITA, YOSHINORI |
分类号 |
H02M5/458;H02P23/06;(IPC1-7):H02M7/539 |
主分类号 |
H02M5/458 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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