[Problem] An object of the present invention is to provide a motor control apparatus that, with a high reliability, protects the motor release-switch comprising the semiconductor switching elements in small size and an electric power steering apparatus provided the same. [Means for solving the problem] An electric power steering apparatus that drive-controls a motor by an inverter, and a motor release-switch is connected between the inverter and the motor, comprising: a control section to detect an assist state on a driving control system and to ON/OFF-switch a control of the inverter based on a detection result; a motor rotational number detecting section to detect a rotational number of the motor; an energy calculating section to calculate an energy of a motor back-EMF and a regenerative current based on the rotational number; and a judging section to compare the energy with an area of safety operation of the motor release-switch and to OFF-switch the d motor release-switch when the energy becomes within the area of safety operation. As occasion demands, the area of safety operation is calculated with the temperature.
MOTOR CONTROL DEVICE AND ELECTRIC POWER STEERING DEVICE EQUIPPED WITH SAME
MOTORSTEUERUNGSVORRICHTUNG UND ELEKTRISCHE SERVOLENKUNG DAMIT
DISPOSITIF DE COMMANDE DE MOTEUR ET DISPOSITIF DE DIRECTION ASSISTÉE ÉLECTRIQUE ÉQUIPÉ DE CELUI-CI
2018-07-11
Patent
Electronic Resource
English
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