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Patent Searching and Data


Title:
NOISE FILTER
Document Type and Number:
WIPO Patent Application WO/2022/071031
Kind Code:
A1
Abstract:
A noise filter (40) is provided between a DC/AC inverter (20) that performs a switching operation at a first frequency and a DC/DC converter (50) that performs a switching operation at a second frequency higher than the first frequency. The noise filter (40) comprises a capacitor (82) and a common mode choke coil (70). The common mode choke coil (70) includes a core, and a first winding (72) and a second winding (73) that are wound around the core. The common mode choke coil (70) has an inductance that allows the noise filter (40) to have a resonance frequency greater than the first frequency and less than the second frequency even when the core is magnetically saturated.

Inventors:
AKITA YOSHIFUMI (JP)
Application Number:
PCT/JP2021/034630
Publication Date:
April 07, 2022
Filing Date:
September 21, 2021
Export Citation:
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Assignee:
TOYOTA JIDOSHOKKI KK (JP)
International Classes:
H03H7/09; H02M3/00; H02M7/48
Domestic Patent References:
WO2017170819A12017-10-05
WO2019057736A12019-03-28
Foreign References:
JP2018182832A2018-11-15
JP2019041531A2019-03-14
Attorney, Agent or Firm:
SATO Tsutomu et al. (JP)
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