Title:
絶縁抵抗監視装置およびその監視制御方法ならびに電動制御機器
Document Type and Number:
Japanese Patent JP6373296
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To make it possible to easily conduct measurements with the same measurement accuracy as an insulation resistance meter's.SOLUTION: An insulation resistance monitoring device 10 comprises: a voltage generation circuit 54 that is connected to a ground line 34 of a motor M; a synthesis circuit 52 that converts a voltage via a power source line 32 of the motor to insulation resistance; and reference resistance 58 that is arranged between the synthesis circuit 52 and a step-down circuit 56. After a voltage generating by the voltage generation circuit 54 is applied to the ground line 34 to be divided, the voltage is stepped down by the step-down circuit 56, and the stepped-down voltage is input into a control unit 42. That is, a linear insulation resistance value corresponding to the input voltage is computed by a computation unit 44, and thus, the insulation resistance value to be computed becomes a value to be corrected so as to fall within a range approximate to a so-called actual measurement value (a synonym of [an allowable range]). Accordingly, the insulation resistance value of the motor corresponding to the input voltage to the control unit is the linear insulation resistance value to be corrected to the allowable range of the actual measurement value, and therefore, measurements are easily achieved with the almost same measurement accuracy as an insulation resistance meter's.SELECTED DRAWING: Figure 2
Inventors:
Atsushi Suzuki
Osamu Kihara
Osamu Kihara
Application Number:
JP2016060715A
Publication Date:
August 15, 2018
Filing Date:
March 24, 2016
Export Citation:
Assignee:
Takenaka Electric Co., Ltd.
International Classes:
G01R31/02; G01R27/02; G01R31/34
Domestic Patent References:
JP60050458A | ||||
JP2012225866A |
Foreign References:
EP2985613A1 |
Attorney, Agent or Firm:
Michio Fujii