Abstract: To provide a controller for motor which can reduce a torque ripple up to high frequency, without amplifying unnecessary noise and vibration. A controller for motor estimates an interlinkage flux based on the applied voltage and the detection value of current; estimates an output torque based on the detection value of current and the estimation value of interlinkage flux; extracts a pulsation component from the estimation value of output torque; calculates a voltage command correction value based on the extraction value of pulsation component; calculates a voltage command after superimposing by superimposing the voltage command correction value on the voltage command basic value; and applies voltage to winding based on the voltage command after superimposing.

Abstract: A modulation control unit calculates a voltage offset on the basis of fundamental or basic voltage references, and calculates modification voltage references by performing superposition of the voltage offset on the basic voltage references; and an inverter converts, on the basis of the modification voltage references calculated by the modulation control unit, a DC voltage into three-phase voltages whose voltages are applied to three-phase windings of an alternating current rotating machine, wherein, in a case in which the basic voltage references are transformed into three-phase voltage references, and when the three-phase voltage references are defined as a maximum phase, an intermediate phase and a minimum phase in decreasing order of value, the modulation control unit calculates a first voltage offset on the basis of the DC voltage, on that of the maximum phase, and on that of sum of squares of the basic voltage references.

Abstract: To provide a controller for rotary electric machine and an electric power steering apparatus which can increases decreases an increase amount of the current of d-axis in the negative direction appropriately, and can perform the weakening magnetic flux appropriately, irrespective of increase and decrease in the rotational angle speed, without using the information on the inductance and the interlinkage flux of the rotor. A controller for rotary electric machine, in a case where the current command value of q-axis is a positive value, changes the current command value of d-axis, based on a deviation between an offset q-axis current command value obtained by subtracting the q-axis offset value of the positive value from the current command value of q-axis, and the current detection value of q-axis.

Abstract: An electric motor control device, capable of suppressing a torque ripple even when electrical characteristics on a motor have errors or variations, comprises: a fundamental electric-current instruction generator for outputting d-axis and q-axis fundamental electric-current instructions for outputting fundamental torque from the motor having saliency; a position dependency component generator for outputting a position dependency component(s) of the motor according to its rotational position; an electric current correction instruction calculator for calculating d-axis and q-axis current correction instructions from the d-axis and q-axis fundamental electric-current instructions, and the position dependency component(s); an electric current correction instruction superposition unit for generating d-axis and q-axis current instructions by performing superposition of the d-axis and q-axis current correction instructions on the d-axis and q-axis fundamental electric-current instructions; and an electric current con

Abstract: To provide a controller for AC rotary electric machine and an electric power steering apparatus which can superimposes a cancellation current for canceling the torque ripple component on the winding current in feedforward manner and cancel the torque ripple component. A controller for AC rotary electric machine calculates an oscillation voltage command value of q-axis which has the same frequency as the torque ripple component; calculates a reverse phase of the torque ripple component based on the current information and the magnetic pole position; calculates a correction phase corresponding to the phase delay of the actual current with respect to the oscillation voltage command value of q-axis; and sets a phase of the oscillation voltage command value of q-axis to a phase obtained by advancing the reverse phase of the torque ripple component by the correction phase.

Abstract: In an electric motor control device which controls rotation of an AC electric motor having two sets of three-phase windings and provided with a resolver having two systems by calculating voltage command values on dq axes, dq conversion of currents of first three-phase windings is performed using a first angle calculated from output of the first system of the resolver, and dq conversion of currents of second three-phase windings is performed using a second angle calculated from output of the second system of the resolver. With both d-axis current command values set at the same value, respective voltage command values on dq axes are calculated and respectively converted into voltage command values for voltage application to the first three-phase windings, using the first angle, and converted into voltage command values for voltage application to the second three-phase windings, using the second angle.

Abstract: To provide a controller for AC rotary electric machine and an electric power steering apparatus which can superimposes a cancellation current for canceling the torque ripple component on the winding current in feedforward manner and cancel the torque ripple component. A controller for AC rotary electric machine calculates an oscillation voltage command value of q-axis which has the same frequency as the torque ripple component; calculates a reverse phase of the torque ripple component based on the current information and the magnetic pole position; calculates a correction phase corresponding to the phase delay of the actual current with respect to the oscillation voltage command value of q-axis; and sets a phase of the oscillation voltage command value of q-axis to a phase obtained by advancing the reverse phase of the torque ripple component by the correction phase.

Abstract: An electric motor control device, capable of suppressing a torque ripple even when electrical characteristics on a motor have errors or variations, comprises: a fundamental electric-current instruction generator for outputting d-axis and q-axis fundamental electric-current instructions for outputting fundamental torque from the motor having saliency; a position dependency component generator for outputting a position dependency component(s) of the motor according to its rotational position; an electric current correction instruction calculator for calculating d-axis and q-axis current correction instructions from the d-axis and q-axis fundamental electric-current instructions, and the position dependency component(s); an electric current correction instruction superposition unit for generating d-axis and q-axis current instructions by performing superposition of the d-axis and q-axis current correction instructions on the d-axis and q-axis fundamental electric-current instructions; and an electric current con

Abstract: To provide a controller for motor which can reduce a torque ripple up to high frequency, without amplifying unnecessary noise and vibration. A controller for motor estimates an interlinkage flux based on the applied voltage and the detection value of current; estimates an output torque based on the detection value of current and the estimation value of interlinkage flux; extracts a pulsation component from the estimation value of output torque; calculates a voltage command correction value based on the extraction value of pulsation component; calculates a voltage command after superimposing by superimposing the voltage command correction value on the voltage command basic value; and applies voltage to winding based on the voltage command after superimposing.