发明名称 |
Variable frequency drive soft charge circuit |
摘要 |
A variable frequency drive comprises a diode rectifier receiving multiphase AC power and converting the AC power to DC power. An inverter receives DC power and converts the DC power to AC power to drive a load. A link circuit is connected between the diode rectifier and the inverter and comprises a DC bus to provide a relatively fixed DC voltage for the inverter. A link capacitor is across the bus. A soft charge circuit limits in rush current to the link capacitor. The soft charge circuit comprises an inductor in the bus and a resistor assist circuit across the inductor along with an anti-parallel clamping thyristor reverse connected also across the inductor.
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申请公布号 |
US2011007530(A1) |
申请公布日期 |
2011.01.13 |
申请号 |
US20090459718 |
申请日期 |
2009.07.07 |
申请人 |
YASKAWA ELECTRIC AMERICA, INC. |
发明人 |
SWAMY MAHESH M.;KUME TSUNEO JOE |
分类号 |
H02M5/45 |
主分类号 |
H02M5/45 |
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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