Title:
NOISE REDUCER FOR POWER CONVERTER
Document Type and Number:
Japanese Patent JP3044650
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a noise reducer capable of excellently eliminating noises from a power converter by a simple circuit.
SOLUTION: A three-phase induction motor 6 is connected to an inverter device consisting of an AC power 1, a rectifier circuit 3, a filter capacitor 4, and an inverter circuit 5 as load. A leakage current detector 8 in connected between the power supply 1 and the rectifier circuit 3. An N-P-N type first transistor Tr1 is joined between one end of the smoothing capacitor 4 and a case for the motor 6. A P-N-P type second transistor Tr2 is connected between the case for the motor 6 and the other end of the smoothing capacitor 4. The first and second transistors Tr1, Tr2 are driven by an output from the leakage current detector 8, and a current to cancel common-mode noises is injected.
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| JPH09103075 | VOLTAGE CONVERTER |
Inventors:
Isao Takahashi
Application Number:
JP9925496A
Publication Date:
May 22, 2000
Filing Date:
March 27, 1996
Export Citation:
Assignee:
Isao Takahashi
International Classes:
H02M1/12; H02M7/48; H03H7/09; H03K17/16; (IPC1-7): H02M7/48; H02M1/12
Domestic Patent References:
| JP3239194A | ||||
| JP3203521A | ||||
| JP759274A | ||||
| JP9233837A |
Attorney, Agent or Firm:
Noritsugu Takano
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