Motor control device for steer-by-wire steering device

A motor control device controlling a motor having a first coil set and a second coil set, used for a turning actuator of a steer-by-wire steering device, the motor control device comprising:

• a first driving circuit which supplies a driving current based on a received first command value to the first coil set;
• a second driving circuit which is capable of supplying a driving current based on a received second command value to the second coil set;
• a first processor configured to calculate the first command value based on a first detection value of a steering angle of a steering wheel and send the first command value to the first driving circuit;
• a second processor configured to calculate the second command value based on a second detection value of the steering angle of the steering wheel;
• and
• a third processor configured to send the first command value to the second driving circuit when the first command value and the second command value are not divergent and to send the second command value to the second driving circuit when the first command value and the second command value are divergent, wherein
• the third processor is configured such that when an autonomous steering state is not established, the third processor sends the first command value to the second driving circuit regardless of whether or not the first command value and the second command value are divergent.