A motor control system includes a motor, an encoder, and a controller including a controller transmitter configured to transmit a torque command to control the motor. The encoder includes a position detector configured to detect a rotational position of the motor, an encoder receiver configured to receive the torque command from the controller transmitter, first disturbance estimating circuitry configured to estimate a first disturbance torque based on the rotational position and the torque command, and an encoder transmitter configured to transmit the rotational position and the first disturbance torque to the controller.

A shift range control device switches a shift range by controlling drive of a motor. An angle calculation unit calculates a motor angle based on a signal from a rotation angle sensor that detects a rotation position of the motor. A drive control unit drives the motor so that the motor angle becomes a target angle according to the target shift range, and stops a rotor by a fixed phase energization, when the motor angle reaches a target angle. When the rotor vibrates with respect to stop position, the drive control unit maintains a state in which a brake torque, which is the torque generated when moving away from center of vibration, is larger than an acceleration torque, which is the torque generated when moving toward the center of vibration, and reduces the current that energizes the motor based on a difference between the brake torque and the acceleration torque.

Various methods and systems are provided for an x-ray imaging system. In one example, a method for decelerating a rotor of an x-ray tube of an imaging system includes controlling and/or monitoring a speed and position of the rotor, passing the rotor through a first position where a force exerted on the rotor, is less than Earth's gravitational pull, the force due to a combination of gravity and radial acceleration, and initiating a predefined deceleration profile to decelerate the rotor to a halt when the x-ray tube passes through the first position.

Various methods and systems are provided for an x-ray imaging system. In one example, a method for decelerating a rotor of an x-ray tube of an imaging system includes controlling and/or monitoring a speed and position of the rotor, passing the rotor through a first position where a force exerted on the rotor, is less than Earth's gravitational pull, the force due to a combination of gravity and radial acceleration, and initiating a predefined deceleration profile to decelerate the rotor to a halt when the x-ray tube passes through the first position.

A soft start circuit for a mixer is provided that includes an input for receiving an analog voltage representing a raw target speed; a current mirror for causing a speed target to change at a constant rate when the raw target speed represents a change from a current speed; and a comparator for receiving and comparing the raw target speed and an output from the current mirror and restricting the output from exceeding the raw target speed in order to restrict a soft start to only impede the speed target change when the raw target speed is increasing while not impeding the speed target change when the raw target speed is decreasing. The output of the soft start circuit is an analog representation of a soft start modified desired target speed.

A circuit for a smart safety system includes an electrical input connection to obtain power from a power source and an electrical output connection to regulate the power to an AC motor. The circuit also includes an adjustable DC power supply. One or more electronic switching devices regulate electricity output to the AC motor. The circuit has one more functional states including: a first state, activated via a first electrical signal, in which electricity is supplied to AC motor to allow normal operation of the AC motor, and a second state, activated via a second electrical signal, in which no electricity is supplied to the AC motor to prevent unintentional operation of the AC motor.

A circuit for a smart safety system includes an electrical input connection to obtain power from a power source and an electrical output connection to regulate the power to an AC motor. The circuit also includes an adjustable DC power supply. One or more electronic switching devices regulate electricity output to the AC motor. The circuit has one more functional states including: a first state, activated via a first electrical signal, in which electricity is supplied to AC motor to allow normal operation of the AC motor, and a second state, activated via a second electrical signal, in which no electricity is supplied to the AC motor to prevent unintentional operation of the AC motor.

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 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 vehicle includes a power source, a requested driving force calculator, and an actual driving force calculator, and a driving controller. The requested driving force calculator calculates a requested driving force on the basis of a driving operation. The actual driving force calculator calculates an actual driving force following the requested driving force, while limiting a rate of change in the actual driving force. The driving controller controls the power source to output the actual driving force calculated. The actual driving force calculator changes the rate of change in the actual driving force, on the basis of a difference between the requested driving force and the actual driving force, and a lapsed time of limiting the rate of change in the actual driving force.