A motor-driven power steering system and a driving method thereof are disclosed. The motor-driven power steering system according to the present invention comprises: a vehicle speed sensor for detecting the speed of a vehicle; a temperature sensor for detecting the temperature of a power pack; an electric current sensor for detecting the supplied amount of an electric current applied to the motor-driven power steering system; a storage part for storing a thermal resistance value according to the speed of the vehicle with respect to the temperature of the power pack; and a control part for calculating an estimated temperature by reflecting the thermal resistance value according to the speed of the vehicle with respect to the temperature of the power pack detected from the storage part and the supplied amount of the electric current applied to the motor-driven power steering system on a temperature estimation function, and driving a motor according to the calculated estimated temperature.

    전동식 조향 장치 및 그 구동방법에 대한 발명이 개시된다. 본 발명의 전동식 조향 장치는 차속을 검출하는 차속센서와 파워팩의 온도를 검출하는 온도센서와 MDPS에 인가되는 전류 공급량을 검출하는 전류센서와 파워팩의 온도 대비 차속에 따른 열저항값이 저장된 저장부 및 저장부로부터 검출된 파워팩의 온도 대비 차속에 따른 열저항값과, MDPS에 인가되는 전류 공급량을 온도예측함수에 반영하여 추정온도를 계산하고, 계산된 추정온도에 따라 모터를 구동시키는 제어부를 포함하는 것을 특징으로 한다.


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    Title :

    MOTOR DRIVEN POWER STEERING AND DRIVING METHOD THEREOF


    Additional title:

    전동식 조향 장치 및 그 구동방법


    Contributors:
    OH SE WOOK (author)

    Publication date :

    2015-06-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion