Abstract: A motor drive device for valve timing control of an internal combustion engine includes: a motor drive unit that controls a phase of a camshaft to drive a motor for controlling opening and closing operation of a valve; and a determination unit that determines whether a timing is to start up the motor or to normally drive the motor. The motor drive unit drives the motor with an advance angle when it is determined that the timing is to normally drive the motor by the determination unit, and the motor drive unit normally drives the motor without the advance angle when it is determined that the timing is to start up the motor.

Abstract: A motor drive device for valve timing control of an internal combustion engine includes: a motor drive unit that controls a phase of a camshaft to drive a motor for controlling opening and closing operation of a valve; and a determination unit that determines whether a timing is to start up the motor or to normally drive the motor. The motor drive unit drives the motor with an advance angle when it is determined that the timing is to normally drive the motor by the determination unit, and the motor drive unit normally drives the motor without the advance angle when it is determined that the timing is to start up the motor.

Abstract: A motor control apparatus for adjusting a cam phase includes a motor control part, which controls a current supplied to a stator coil by controlling plural switching elements forming an inverter to turn on and off. The motor control part stops the current supplied to the stator coil each time a motor rotates a predetermined rotation angle interval in a power generation control mode, in which a rotation torque is generated in a direction to impede the motor rotation. The motor control part maintains the power generation control mode when a rotation signal is determined as varying in a predetermined time period. The motor control part switches over an operation mode to a normal control mode to generate a rotation torque in a direction to promote the motor rotation when the rotation signal is determined as not varying in the predetermined time period.

Abstract: A motor control apparatus for adjusting a cam phase includes a motor control part, which controls a current supplied to a stator coil by controlling plural switching elements forming an inverter to turn on and off. The motor control part stops the current supplied to the stator coil each time a motor rotates a predetermined rotation angle interval in a power generation control mode, in which a rotation torque is generated in a direction to impede the motor rotation. The motor control part maintains the power generation control mode when a rotation signal is determined as varying in a predetermined time period. The motor control part switches over an operation mode to a normal control mode to generate a rotation torque in a direction to promote the motor rotation when the rotation signal is determined as not varying in the predetermined time period.

Abstract: Disclosed is a state detecting device that detects characteristic quantities regarding the driver that are represented by biological information such as the eyelid opening degree and frequency of heartbeat of the driver, identifies the group to which the state of the driver belongs between a Group 1 and a Group 2 into which multiple classes defined using the activity level of the driver as an indicator are sorted based on the detected characteristic quantities, outputs information including the identification results as output values, and detects the class to which the current state of the driver belongs based on loss values calculated from the output values. From the detected class, to what degree the activity level of the driver is impaired can be detected along with the level.

Abstract: Disclosed is a state detecting device that detects characteristic quantities regarding the driver that are represented by biological information such as the eyelid opening degree and frequency of heartbeat of the driver, identifies the group to which the state of the driver belongs between a Group 1 and a Group 2 into which multiple classes defined using the activity level of the driver as an indicator are sorted based on the detected characteristic quantities, outputs information including the identification results as output values, and detects the class to which the current state of the driver belongs based on loss values calculated from the output values. From the detected class, to what degree the activity level of the driver is impaired can be detected along with the level.