Title:
地絡検出装置
Document Type and Number:
Japanese Patent JP7094918
Kind Code:
B2
Abstract:
A ground fault detection apparatus includes a capacitor, switches for switching between a V0 charge path including the battery and the capacitor, a Vcn charge path including the battery, the capacitor and negative-side insulation resistance as insulation resistance between negative side of the battery and ground, a Vcp charge path including the battery, the capacitor and positive-side insulation resistance as insulation resistance between positive side of the battery and ground, and a charge voltage measurement path including the capacitor and a measurement resistor, an offset voltage divider circuit that divides and offsets voltage produced at the measurement resistor, a control device that controls the switches and calculates the insulation resistance using output voltage of the offset voltage divider circuit as a measured value, based on V0 measured at the V0 charge path, Vcn measured at the Vcn charge path and Vcp measured at the Vcp charge path.
Inventors:
▲高▼松 寛彰
Kawamura Yoshihiro
Takahashi Hisashi
Kawamura Yoshihiro
Takahashi Hisashi
Application Number:
JP2019104432A
Publication Date:
July 04, 2022
Filing Date:
June 04, 2019
Export Citation:
Assignee:
Yazaki Corporation
International Classes:
G01R31/52; G05F1/10
Domestic Patent References:
| JP201117586A | ||||
| JP2016161354A | ||||
| JP2016176823A | ||||
| JP2017102083A |
Foreign References:
| WO2017158375A1 |
Attorney, Agent or Firm:
Fumio Takino
Toshiaki Tsuda
Fukuda Yasuhiro
Toshiaki Tsuda
Fukuda Yasuhiro