Abstract: The electric motor control device includes a rotation angle correction amount calculation unit that, based on a rotation angle signal for an alternating current electric motor output from an angle sensor and a current detection signal for the alternating current electric motor output from a detector, calculates a rotation angle correction amount to correct a rotation angle error between the rotation angle signal and a magnetic pole position of the alternating current electric motor, wherein the rotation angle correction amount calculation unit, based on a current detection signal when a short circuit is caused between winding terminals of the alternating current electric motor, calculates at least either one rotation angle correction amount of a direct current component rotation angle correction amount and an alternating current component rotation angle correction amount.

Abstract: An electric motor control device such that a rotation angle correction value used in a phase correction of an angle sensor rotation angle signal can be calculated with high accuracy is obtained.

Abstract: A synchronous machine drive control device such that a rotation angle correction amount can be detected even when a synchronous machine is rotating at high speed, and the rotation angle correction amount can be detected over a wide range, is obtained. A rotation angle correction amount calculation unit that calculates a correction amount of a rotation angle of a synchronous machine is included in an inverter control device, and the correction amount of the rotation angle is calculated based on a current detected by a current sensor by a three-phase short circuit being implemented in a state wherein the synchronous machine is rotating.

Abstract: Provided are a synchronous machine control device SMCD including a converter configured to boost a voltage of a direct current power source DCPS in which, when the SMCD returns to operation after the operation stopping, fail-proof return to operation through the prevention of damage to the DCPS and the shortening of the time required for the return to operation are balanced. When returning to operation, the SMCD issues an operation enable command to an inverter and the converter simultaneously in the case where a calculated electric power value calculated from a rotational speed and a torque command is equal or higher than a threshold and, in the case where the calculated electric power value is less than the threshold, issues an operation enable command to the converter after an operation command that makes the electric power of the inverter equal or higher than a threshold is issued.

Abstract: The rotating-electric-machine control apparatus is provided with two or more torque compensation amount maps that each store a torque compensation amount corresponding to a detection rotation speed and a first torque command and a torque compensation amount map selector that selects a single torque compensation amount map from the two or more torque compensation amount maps, based on at least one of the detection rotation speed and control information indicating a control method utilized by the voltage applying device.

Abstract: Provided is a control device for a permanent magnet-type rotating electrical machine (100), which includes a current coordinate transformation unit (109) configured to output a d-axis current and a q-axis current by coordinate transformation of three-phase AC currents respectively detected by current detection units (111, 112, 113), a current correction direction calculation unit (108) configured to calculate a current correction direction through use of the d-axis current and the q-axis current, and a current correction amount addition unit (102) configured to correct a d-axis current command and a q-axis current command based on the current correction direction. In this manner, an induced voltage is converged to lie within a maximum voltage circle in accordance with a power supply voltage.

Abstract: A motor control device includes a current detector which, in generating a feedback current value on the basis of the detection result of a three-phase AC current supplied from an inverter to a motor, generates a first current detection value based on a first sample timing and a second current detection value based on a second sample timing that is shorter than the first sample timing; a coordinates converter which converts the coordinates of the first current detection value and the second current detection value to q and d axes; and a detection current processor which generates a feedback current value from the coordinate conversion results.

Abstract: The rotating-electric-machine control apparatus is provided with two or more torque compensation amount maps that each store a torque compensation amount corresponding to a detection rotation speed and a first torque command and a torque compensation amount map selector that selects a single torque compensation amount map from the two or more torque compensation amount maps, based on at least one of the detection rotation speed and control information indicating a control method utilized by the voltage applying device.

Abstract: When a failure of current detection parts occurs while a synchronous machine is operating, the failure of the current detection parts is detected and the operation of the synchronous machine is continued. An open-loop control part for performing control without using the detected current values of the current detection parts and a closed-loop control part for performing control using the detected current values are included, and a failure of the current detection parts is detected while the open-loop control part is operating.

Abstract: To provide an AC rotary machine controller which can improve setting accuracy of torque command correction value in a region where change of torque command correction value to change of rotational speed and torque becomes large and where nonlinearity is high, and can suppress increase in data amount of correction value setting map. In correction value setting map, one or both of a torque axis unequal interval setting that sets interval of the torque command map axis to unequal interval in each rotational speed; and a rotation axis unequal interval setting that sets interval of the rotational speed map axis to unequal interval were done.

Abstract: In a control device for an electric motor (101), a three-phase/two-phase conversion section (203) outputs N d-axis current values and N q-axis current values in each measurement period that is 1/N of a carrier period. An average value calculation section (204) calculates average values of those values. A difference calculation section (205) calculates a difference between a k-th d-axis current value and the average value of the d-axis current values as a d-axis current difference, and calculates a difference between a k-th q-axis current value and the average value of the q-axis current values as a q-axis current difference. A filtering section (206) performs low-pass filtering on each difference, and outputs d-axis and q-axis current correction values. A correction calculation section (207) performs a linear operation of each k-th current value and the corresponding current correction value, and outputs the corrected current values.

Abstract: To provide an AC rotary machine controller which can improve setting accuracy of torque command correction value in a region where change of torque command correction value to change of rotational speed and torque becomes large and where nonlinearity is high, and can suppress increase in data amount of correction value setting map. In correction value setting map, one or both of a torque axis unequal interval setting that sets interval of the torque command map axis to unequal interval in each rotational speed; and a rotation axis unequal interval setting that sets interval of the rotational speed map axis to unequal interval were done.

Abstract: Provided are a synchronous machine control device SMCD including a converter configured to boost a voltage of a direct current power source DCPS in which, when the SMCD returns to operation after the operation stopping, fail-proof return to operation through the prevention of damage to the DCPS and the shortening of the time required for the return to operation are balanced. When returning to operation, the SMCD issues an operation enable command to an inverter and the converter simultaneously in the case where a calculated electric power value calculated from a rotational speed and a torque command is equal or higher than a threshold and, in the case where the calculated electric power value is less than the threshold, issues an operation enable command to the converter after an operation command that makes the electric power of the inverter equal or higher than a threshold is issued.

Abstract: In a control device for an electric motor (101), a three-phase/two-phase conversion section (203) outputs N d-axis current values and N q-axis current values in each measurement period that is 1/N of a carrier period. An average value calculation section (204) calculates average values of those values. A difference calculation section (205) calculates a difference between a k-th d-axis current value and the average value of the d-axis current values as a d-axis current difference, and calculates a difference between a k-th q-axis current value and the average value of the q-axis current values as a q-axis current difference. A filtering section (206) performs low-pass filtering on each difference, and outputs d-axis and q-axis current correction values. A correction calculation section (207) performs a linear operation of each k-th current value and the corresponding current correction value, and outputs the corrected current values.

Abstract: Provided is a control device for a permanent magnet-type rotating electrical machine (100), which includes a current coordinate transformation unit (109) configured to output a d-axis current and a q-axis current by coordinate transformation of three-phase AC currents respectively detected by current detection units (111, 112, 113), a current correction direction calculation unit (108) configured to calculate a current correction direction through use of the d-axis current and the q-axis current, and a current correction amount addition unit (102) configured to correct a d-axis current command and a q-axis current command based on the current correction direction. In this manner, an induced voltage is converged to lie within a maximum voltage circle in accordance with a power supply voltage.

Abstract: A method of controlling a rotary electric machine, which is configured to supply an electric control amount to a power conversion unit, which is configured to convert a DC voltage from a power source into a drive current to the rotary electric machine in accordance with the electric control amount, the method including: using a conversion map, which is used to calculate the electric control amount based on a rotation speed of the rotary electric machine at a particular DC voltage of the rotary electric machine and a required command value; and calculating the electric control amount in accordance with a ratio between the particular DC voltage and the rotation speed of the rotary electric machine in determining the electric control amount in accordance with the conversion map.

Abstract: There is provided a controller for a rotary electric machine drive apparatus capable of reducing data-processing load and amount of memories required for a data processing which calculates a voltage command value of the converter which reduces power loss. A controller calculates the required minimum voltage which is required in the case of performing a maximum torque/current control is calculated; calculates a converter loss coefficient which is a coefficient of a polynomial representing a power loss characteristic of the converter; calculates an inverter loss coefficient which is a coefficient of a polynomial representing a power loss characteristic of the inverter; calculates a sum total of loss coefficients for each order of polynomials; calculates the low loss voltage which the sum total power loss becomes a minimum, based on the sum total loss coefficients for each order; sets to the voltage command value of the converter.

Abstract: A method of controlling a rotary electric machine, which is configured to supply an electric control amount to a power conversion unit, which is configured to convert a DC voltage from a power source into a drive current to the rotary electric machine in accordance with the electric control amount, the method including: using a conversion map, which is used to calculate the electric control amount based on a rotation speed of the rotary electric machine at a particular DC voltage of the rotary electric machine and a required command value; and calculating the electric control amount in accordance with a ratio between the particular DC voltage and the rotation speed of the rotary electric machine in determining the electric control amount in accordance with the conversion map.

Abstract: When a failure of current detection parts occurs while a synchronous machine is operating, the failure of the current detection parts is detected and the operation of the synchronous machine is continued. An open-loop control part for performing control without using the detected current values of the current detection parts and a closed-loop control part for performing control using the detected current values are included, and a failure of the current detection parts is detected while the open-loop control part is operating.

Abstract: An object is to ensure torque accuracy by suppressing the occurrence of low-frequency fold-back noise caused by aliasing, and stable control performance with respect to environmental variations, such as angular errors, power voltage ripples, and so on. A motor control device includes a current detector (10) which, in generating a feedback current value on the basis of the detection result of a three-phase AC current supplied from an inverter (2) to a motor (1), generates a first current detection value based on a first sample timing and a second current detection value based on a second sample timing that is shorter than the first sample timing; a coordinates converter (11) which converts the coordinates of the first current detection value and the second current detection value to q and d axes; and a detection current processor (13) which generates a feedback current value from the coordinate conversion results.