Abstract: A motor controller includes a temperature estimator that estimates a temperature of an element in a motor driver circuit that drives a motor, or a temperature of a winding of the motor, and a non-volatile memory that provides a first area and a second area for storing the estimated temperature. The temperature estimator writes the estimated temperature to both of the first area and the second area.

Abstract: A motor controller includes a temperature estimator that estimates a temperature of an element in a motor driver circuit that drives a motor, or a temperature of a winding of the motor, and a non-volatile memory that provides a first area and a second area for storing the estimated temperature. The temperature estimator writes the estimated temperature to both of the first area and the second area.

Abstract: A motor controller includes a temperature estimator that estimates a temperature of an element in a motor driver circuit that drives a motor, or a temperature of a winding of the motor, and a non-volatile memory that provides a first area and a second area for storing the estimated temperature. The temperature estimator writes the estimated temperature to both of the first area and the second area.

Abstract: A motor controller includes an H-bridge circuit, a switching-element driving circuit, a motor-current detection circuit, a sample hold circuit executing a sample hold of an output of the motor-current detection circuit at every half period and outputting the output of the motor-current detection circuit as a first signal and a second signal, according to a PWM output timing of the switching-element driving circuit, and a motor-current calculation circuit selecting a signal that is larger between the first signal and the second signal as a selection signal, calculating a value of the selection signal as an absolute value of a motor current, determining a current direction based on a relation between the selection signal and a PWM output signal at a sample timing that the selection signal is obtained.

Abstract: A motor control apparatus controlling current feeding and a rotational direction of a motor includes: four bridge-circuit switches between a high and low potential lines; two current feeding line switches connected through the motor between a first and second nodes in series to arrange two parasitic diodes facing each other; a pull-up resistor between the high potential line and a third node; a pull-down resistor between the low potential line and a fourth node to interpose the motor between the third and fourth nodes; a protective diode blocking current; and a fault diagnostic device having: a driver turning on or off the switches; and a voltage determinator determining suitability of a first and second voltages and performing initial fault diagnosis for at least one of the switches.

Abstract: A motor controller includes an H-bridge circuit, a switching-element driving circuit, a motor-current detection circuit, a sample hold circuit executing a sample hold of an output of the motor-current detection circuit at every half period and outputting the output of the motor-current detection circuit as a first signal and a second signal, according to a PWM output timing of the switching-element driving circuit, and a motor-current calculation circuit selecting a signal that is larger between the first signal and the second signal as a selection signal, calculating a value of the selection signal as an absolute value of a motor current, determining a current direction based on a relation between the selection signal and a PWM output signal at a sample timing that the selection signal is obtained.

Abstract: A motor control apparatus controlling current feeding and a rotational direction of a motor includes: four bridge-circuit switches between a high and low potential lines; two current feeding line switches connected through the motor between a first and second nodes in series to arrange two parasitic diodes facing each other; a pull-up resistor between the high potential line and a third node; a pull-down resistor between the low potential line and a fourth node to interpose the motor between the third and fourth nodes; a protective diode blocking current; and a fault diagnostic device having: a driver turning on or off the switches; and a voltage determinator determining suitability of a first and second voltages and performing initial fault diagnosis for at least one of the switches.

Abstract: A motor controller includes a temperature estimator that estimates a temperature of an element in a motor driver circuit that drives a motor, or a temperature of a winding of the motor, and a non-volatile memory that provides a first area and a second area for storing the estimated temperature. The temperature estimator writes the estimated temperature to both of the first area and the second area.