A motor control system includes a variable voltage supply in signal communication with a direct current (DC) motor. The DC motor includes a rotor induced to rotate in response to a drive current generated by a variable supply voltage delivered by the voltage supply. The rotation of the rotor 103 generates a mechanical force that drives a component. A ripple count circuit 104 is configured to filter the drive current based on a rotational speed (ω) of the rotor 103 to generate a filtered drive current signal, and to generate a varying threshold based on the filtered drive current signal. Based on a comparison between the filtered drive current signal and the varying threshold, the ripple count circuit 104 generates a pulsed output signal indicative of the rotational speed (ω) of the rotor and a rotational position (θ) of the rotor.

An adjusting device having a DC motor and an adjusting member driven by an output shaft of the DC motor is disclosed. The adjusting device has a power driver coupled to the DC motor for controlling a motor current of the DC motor, a current measurement circuit that is adapted to detect a current consumption of the DC motor and to output a current measurement signal dependent on the number of revolutions of the DC motor, and a computing unit, to which the current measurement signal is input adapted to determine the number of revolutions of the DC motor based on the current measurement signal.

A motor control system includes a variable voltage supply in signal communication with a direct current (DC) motor. The DC motor includes a rotor induced to rotate in response to a drive current generated by a variable supply voltage delivered by the voltage supply. The rotation of the rotor (103) generates a mechanical force that drives a component. A ripple count circuit (104) is configured to filter the drive current based on a rotational speed (ω) of the rotor (103) to generate a filtered drive current signal, and to generate a varying threshold based on the filtered drive current signal. Based on a comparison between the filtered drive current signal and the varying threshold, the ripple count circuit (104) generates a pulsed output signal indicative of the rotational speed (ω) of the rotor and a rotational position (θ) of the rotor.

A motor control system includes a variable voltage supply in signal communication with a direct current (DC) motor. The DC motor includes a rotor induced to rotate in response to a drive current generated by a variable supply voltage delivered by the voltage supply. The rotation of the rotor 103 generates a mechanical force that drives a component. A ripple count circuit 104 is configured to filter the drive current based on a rotational speed (ω) of the rotor 103 to generate a filtered drive current signal, and to generate a varying threshold based on the filtered drive current signal. Based on a comparison between the filtered drive current signal and the varying threshold, the ripple count circuit 104 generates a pulsed output signal indicative of the rotational speed (ω) of the rotor and a rotational position (θ) of the rotor.

According to an embodiment of the present invention, a control device of an opening and closing member for a vehicle including a control portion outputting a control signal that switches a connection of a switch portion to control a drive motor closing and opening the opening and closing member mounted on the vehicle and a detection portion outputting a signal indicating the rotary direction of the drive motor to the control portion, wherein the control portion determines whether or not the switch portion is stuck on a basis of the signal from the detection portion, and in a case where the control portion determines that the switch portion is stuck, the control portion outputs the control signal for switching the connection of the switch portion so as to stop the drive motor and to maintain the drive motor in a stop state is provided.

An embodiment of a control system includes a current command module configured to receive a torque command and output a current command for controlling a direct current (DC) motor, and a current capability limiting module configured to receive the current command and a current limit indicating a maximum motor current, limit the current command based on the current limit, and actively further limit the current command based on a capability limit value.

An electric linear motion actuator includes an electric motor, a motion conversion mechanism for converting the torque of the electric motor to the linear driving force of an outer ring member, a load sensor, and a motor control device. The motor control device is configured to control the electric current applied to the electric motor such that the torque of the electric motor increases until the pressing force detected by the load sensor exceeds a target value, and then the torque of the electric motor decreases until the pressing force detected by the load sensor reaches the target value.

An electric linear motion actuator includes an electric motor, a motion conversion mechanism for converting the torque of the electric motor to the linear driving force of an outer ring member, a load sensor, and a motor control device. The motor control device is configured to control the electric current applied to the electric motor such that the torque of the electric motor increases until the pressing force detected by the load sensor exceeds a target value, and then the torque of the electric motor decreases until the pressing force detected by the load sensor reaches the target value.

A device includes a housing configured with a working element and a motor configured for urging motion of the working element. The device further includes a power control module. The power control module is configurable for being in electrical connection with at least one of the motor, a first power source configuration and a second power source configuration. The first power source configuration is configurable for being electrically connected to a battery assembly having a DC power output. The second power source configuration is configurable for being electrically connected to a power inverter, the power inverter configured for receiving an AC power and further configured for outputting a DC power to the second power source configuration. The power control module includes an automatic power selection configuration for automatically selecting the second power source configuration when the second power source configuration receives DC power from the power inverter.

A device includes a housing configured with a working element and a motor configured for urging motion of the working element. The device further includes a power control module. The power control module is configurable for being in electrical connection with at least one of the motor, a first power source configuration and a second power source configuration. The first power source configuration is configurable for being electrically connected to a battery assembly having a DC power output. The second power source configuration is configurable for being electrically connected to a power inverter, the power inverter configured for receiving an AC power and further configured for outputting a DC power to the second power source configuration. The power control module includes an automatic power selection configuration for automatically selecting the second power source configuration when the second power source configuration receives DC power from the power inverter.