A wiper motor control circuit controls a drive circuit such that an actual speed of a wiper speed computed based on change in a rotation angle of an output shaft of the wiper motor detected by a rotation angle sensor that detects the rotation angle becomes a target speed corresponding to a position of a wiper blade indicated by the rotation angle detected by the rotation angle sensor. The wiper motor control circuit also controls the drive circuit so as to apply a braking current in the wiper motor when the actual speed has exceeded a threshold value when the rotation angle detected by the rotation angle sensor indicates a return position of the wiper blade.

A motor control system for use in an electric vehicle includes an accelerator lever operable by a user, a controller configured or programmed to control an electric motor to generate a drive power to drive the electric vehicle, wherein a rotation speed of the electric motor is increased in response to an increase in a first rotation angle in a first rotation direction of the accelerator lever from a reference position of the accelerator lever, and a first torsion spring including a coil portion inside of which a rotation shaft of the accelerator lever extends to apply a first elastic force in a second rotation direction opposite to the first rotation direction. The controller is configured or programmed to perform a control to stop the electric motor upon detecting that the first rotation angle is equal to or greater than a first predetermined rotation angle.

A shift device includes: a motor drive circuit; a motor driver unit for driving the motor drive circuit; a control unit that controls the motor driver unit; a motor power supply path; a system power supply path; and a buck-boost unit that converts electric power supplied from the system power supply path to a predetermined voltage and outputs the voltage. Electric power is supplied to the control unit via the buck-boost unit, and either the electric power from the motor power supply path or the electric power from the system power supply path is supplied to the motor driver unit based on a voltage.

An electronic device may include a housing including a first housing and a second housing configured to receive at least a portion of the first housing and move with respect to the first housing, a display configured to be extended based on a slide of the first housing, a motor disposed in the housing, a gear assembly configured to move the first housing and including a first gear connected to the motor and a second gear configured to mesh with the first gear, at least one sensor disposed in the housing and configured to detect a driving state of at least a portion of the gear assembly, and at least one processor operatively connected with the motor and the at least one sensor. The at least one processor may sense, through the at least one sensor, a signal related to the driving state of at least the portion of the gear assembly while at least one of the first gear or the second gear is driven and identify whether at least one of the first gear or the second gear is deformed based on the sensed signal.