Patent ID: 7031813
Filing Date: 2006-04-18
Classification: B62D

Abstract:
1. An electric steering control device having a motor drive circuit for applying a drive electric current depending on an electric current command value, to an electric motor which supplies a torque to a steering mechanism of a motor vehicle and a command value generating section for generating said electric current command value in dependence on the driving state of said drive vehicle, said control device comprising: a temperature sensor for detecting the temperature of a circuit board mounting said motor drive circuit thereon; and a compensation section provided in said command value generating section for compensating said electric current command value based on the board temperature detected by said temperature sensor, wherein: assuming that a symbol “X” represents an electric current command value which is required to apply a predetermined drive electric current to said electric motor when said circuit board is at a predetermined temperature and that another symbol “Y” represents an electric current command value which is required to apply said predetermined drive electric current to said electric motor when said circuit board is at each of various temperatures, a compensating value R calculated by the ratio of said X to said Y in correspondence respectively to said various temperatures of said circuit board increases or decreases said electric current command value output from said motor drive circuit to compensate said electric current command value.