Title:
ZVS METHOD AND ZVS POWER CONVERTER
Document Type and Number:
Japanese Patent JP3797885
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a ZVS method and a ZVS power converter which has no ringing sound, capable of improving many defects caused by the ringing sound symptom, and which is used in an electric power converter.
SOLUTION: An auxiliary reactor La for a ZVS circuit is provided between a primary coil Np for a transformer and a DC connection contact between two power switches Q1 and Q2. One or two diode s D3, D4 are added to a circuit contact between the primary coil Np for the transformer and the auxiliary reactor La, corresponding to which the type of half-wave rectification or full- wave rectification is the power converter. The diodes D3, D4 short-circuit the current of the auxiliary reactor La, by acting with the power switches Q1, Q2 which respectively react on, when the ringing sound symptom starts at an L-C circuit formed out of the auxiliary reactor La and a primary stray capacitance of the transformer to restrain the primary stray capacitance voltage of the transformer and block the oscillation.
Inventors:
Ryo Nishiki
Application Number:
JP2001119824A
Publication Date:
July 19, 2006
Filing Date:
April 18, 2001
Export Citation:
Assignee:
Tenami Electronics Co., Ltd.
International Classes:
H02M3/28; H02M1/44; H02M3/335; (IPC1-7): H02M3/28
Domestic Patent References:
| JP60153691U | ||||
| JP7245946A | ||||
| JP7312868A | ||||
| JP2000324837A |
Foreign References:
| US5418704 | ||||
| US5959438 | ||||
| US6147886 | ||||
| US5442540 |
Attorney, Agent or Firm:
Masaki Hattori
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