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Title:
ELECTRIC WIRE PROTECTION DEVICE AND CONTROL METHOD OF ELECTRIC WIRE PROTECTION DEVICE
Document Type and Number:
Japanese Patent JP2018152989
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an electric wire protection device capable of ensuring accuracy in temperature prediction of an electric wire, while suppressing operation load.SOLUTION: An electric wire protection device includes a voltage adjustment unit for supplying a load with the power supply side voltage while adjusting, and a control unit having a calculation part for calculating the temperature information of an electric wire, connecting the power supply and the load, from the value of a current flowing through the voltage adjustment unit, and bringing the voltage adjustment unit into a state for blocking the power supply and the load, based on the temperature information. The current value is sampled multiple times in a predetermined calculation period Tcal, and the calculation part calculates the calorific value and the correction factors of the electric wire in the calculation period from multiple times of sampling results. The calorific value is calculated from one current value Ipk determined from multiple times of sampling results and the calculation period, the correction factor is a ratio of the time when electrification is detected in the calculation period, and the calculation part calculates the temperature information by multiplying the calorific value by the correction factors.SELECTED DRAWING: Figure 2

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Inventors:
KIKUCHI TAKASHI
MIYAGAWA TAKAHIRO
NAGAKURA SHUNSUKE
UEDA KEISUKE
NISHINO TOMOYA
UJIGAWA NOBORU
KAWAMATA SEIJU
TSUKIOKA MASATAKA
EZOE RIKUYA
Application Number:
JP2017047328A
Publication Date:
September 27, 2018
Filing Date:
March 13, 2017
Export Citation:
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Assignee:
YAZAKI CORP
HONDA MOTOR CO LTD
International Classes:
H02H5/04; G01K3/02
Attorney, Agent or Firm:
Toranomon Intellectual Property Office