Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1995-06-23
1997-08-26
Cabeca, John W.
Electricity: motive power systems
Induction motor systems
Primary circuit control
318802, 318492, 363 82, H02M 112
Patent
active
056613903
ABSTRACT:
This invention provides cost-effective suppressing conducted radio-noise emissions from industrial inverter-motor drives whose EMI performance is able to meet the CISPR or FCC limits on conducted emissions. The invention includes some small size L,C filtering elements built inside the inverter, e.g., two grounding capacitance connected from both side of DC link to grounding heat sink of devices, a line capacitance across a DC link, three line capacitances across phase leads in AC input side of the diode rectifier, a zero sequence inductance both in each phase input and in each phase output lead of the inverter. Optionally, an extra secondary winding of the zero sequence inductor is connected to main circuit of inverter via a L, R, C network.
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Lipo Thomas A.
Zhong Erkuan
Bloom Leonard
Cabeca John W.
Electric Power Research Institute Inc.
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