System using a power converter
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United States of America Patent
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-
May 9, 2006
Grant Date -
Aug 28, 2003
app pub date -
Aug 23, 2002
filing date -
Feb 26, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
EMI noise in a system using a power converter with switching control is reduced in a simple configuration.The power converter 3 includes a converter 31, a smoothing capacitor 32, and an inverter 33, and receives the power from an AC power supply 1 via an AC reactor 2 and converts it into a power of an optional frequency and voltage to supply to a motor 4. Damping impedance elements 6, 7, 8 are inserted between the frame of the motor 4 and the ground 5, between the cooling fin 34 of the power converter 3 and the ground 5, and between the AC reactor 2 and the ground 5, respectively. Further, paths between the AC reactor 2 and ground 5, between the power converter 3 and ground 5, and between the motor 4 and ground 5 are insulated except that the damping impedance elements 6, 7, 8 are inserted.
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