IP Library › Granted Patent US 10,707,676
Granted Patent B2
US 10,707,676 · App. 15/911,492 · Granted Jul 7, 2020

Electric wire protection device

Inventors: Takashi Kikuchi (Shizuoka, JP); Keisuke Ueta (Shizuoka, JP); Syunsuke Nagakura (Shizuoka, JP); Takahiro Miyakawa (Shizuoka, JP); Tomoya Nishino (Saitama, JP); Noboru Ujigawa (Saitama, JP); Seiju Kawamata (Saitama, JP); Masataka Tsukioka (Saitama, JP); Rikuya Ezoe (Saitama, JP)
Assignees: YAZAKI CORPORATION; HONDA MOTOR CO., LTD.
H02H6/00G01K3/005G01K7/42G01K7/427G01R19/0092H02H3/08H02H5/04H02H7/226G01K2205/00G01K2217/00H01H2011/0068H02H7/268
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Quick Facts
Patent No.
US 10,707,676
App. No.
15/911,492
Granted
Jul 7, 2020
Kind
B2
Abstract

An electric wire protection device includes a voltage adjuster that adjusts voltage on a power source side to be supplied to a load and a controller that includes a temperature calculation part which calculates temperature information of an electric wire based on a current value flowing through the voltage adjuster. The controller sets a first time constant as a time constant used to calculate the temperature information while the voltage adjuster is in the interrupted state, and sets a second time constant as a time constant used to calculate the temperature information while the voltage adjuster supplies power to the load. The first time constant is a value larger than the second time constant and equal to or larger than an actual time constant of the electric wire, and the second time constant is a value smaller than the actual time constant of the electric wire.

Claims (8)

1. An electric wire protection device comprising:

a voltage adjuster that adjusts voltage on a power source side to be supplied to a load; and

a controller that includes a temperature calculation part which calculates temperature information of an electric wire which connects a power source with the load based on a current value flowing through the voltage adjuster, and that is configured to cause the voltage adjuster to be in an interrupted state to interrupt connection between the power source and the load based on the temperature information, wherein

the controller is configured to set a first time constant as a time constant which is used to calculate the temperature information while the voltage adjuster is in the interrupted state, and to set a second time constant as a time constant which is used to calculate the temperature information while the voltage adjuster supplies power to the load,

the first time constant has a value larger than the second time constant and equal to or larger than an actual time constant of the electric wire, and

the second time constant has a value smaller than the actual time constant of the electric wire.

2. The electric wire protection device according to claim 1 , wherein

the first time constant has a value larger than an actual time constant of the electric wire.

Assignments (2)
CHANGE OF ADDRESS Recorded Jun 5, 2023
From: YAZAKI CORPORATION
To: YAZAKI CORPORATION
Reel/Frame 063845/0802 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 5, 2018
From: KIKUCHI, TAKASHI; UETA, KEISUKE; NAGAKURA, SYUNSUKE; MIYAKAWA, TAKAHIRO; NISHINO, TOMOYA; UJIGAWA, NOBORU; KAWAMATA, SEIJU; TSUKIOKA, MASATAKA; EZOE, RIKUYA
To: YAZAKI CORPORATION; HONDA MOTOR CO., LTD.
Reel/Frame 045108/0740 →