Title:
CONTROL DEVICE OF VEHICLE LIFTING DEVICE
Document Type and Number:
Japanese Patent JP2015116321
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To enable appropriate protection of a control circuit from thermal damage.SOLUTION: A control device of a vehicle lifting device is applied to a lifting device comprising a lifting mechanism that is driven by an electric motor and lifts a platform, and changes an electric conduction mode to the electric motor and controls the drive of the electric motor by controlling an electric current flowing through an H bridge circuit. The control device comprises: a thermistor as temperature detection means for detecting the environmental temperature of the H bridge circuit; and a temperature estimation part for estimating the temperature of the H bridge circuit based on an electric current A flowing through the H bridge circuit and a temperature detection value Td(n) detected by the thermistor. The control device also comprises a control part for limiting the electric conduction to the H bridge circuit when a temperature estimation value Te(n) estimated by the temperature estimation part is equal to or greater than a predetermined temperature Tth1 which can protect the H bridge circuit from thermal damage.
Inventors:
TAKAHA NOBUNARI
KOMI RYOSUKE
KOMI RYOSUKE
Application Number:
JP2013261565A
Publication Date:
June 25, 2015
Filing Date:
December 18, 2013
Export Citation:
Assignee:
TOYOTA AUTO BODY CO LTD
International Classes:
A61G3/02; H02P7/29
Attorney, Agent or Firm:
Makoto Onda
Hironobu Onda
Hironobu Onda