Abstract: To provide an AC rotary machine control device which can superimpose the 5th order and the 7th order harmonic voltages on the AC voltage applied to the AC rotary machine by calculation processing of low processing load, and an electric power steering device provided with the same. An AC rotary machine control device performs middle voltage offset processing that adds offset value to middle voltage command when middle voltage command in three phase basic voltage commands is larger than vibration center voltage, and subtracts offset value from middle voltage command when middle voltage command is smaller than vibration center voltage.

Abstract: A control unit includes: control command generation means for generating a first control command and a second control command that specifies currents to flow through a first winding set and second winding set respectively; voltage calculation means for calculating a first voltage command from the first control command and calculating a second voltage command from the second control command; and first voltage application means and second voltage application means for applying voltages to the first winding set and the second winding set of a rotating machine on the basis of the first voltage command and the second voltage command, wherein discharge control for electric charge of a smoothing capacitor is performed while torque generated by current flowing from the smoothing capacitor to the first winding set and torque generated by current flowing from the capacitor to the second winding set are cancelled out with each other.

Abstract: Includes: a first offset voltage computing section, which is configured to compute, when the three-phase voltage commands are determined as a maximum phase, an intermediate phase, and a minimum phase in descending order, a first offset voltage by subtracting a first DC voltage calculated by multiplying the DC voltage by a first constant from the maximum phase, and to set the first offset voltage to zero when a sign of the first offset voltage is negative; a corrected three-phase voltage command computing section, which is configured to subtract the first offset voltage from each phase of the three-phase voltage commands to output corrected three-phase voltage commands; and an inverter, which is configured to output the three-phase voltages based on the corrected three-phase voltage commands.

Abstract: When a switching device cutoff failure determination unit determines a failure in a switching device cutoff switching unit, output torque produced based on the first armature winding and output torque produced based on the second armature winding are produced in such a way that the respective directions thereof are opposite to each other.

Abstract: When a voltage application command is outputted to a three-phase winding of one system, a d-axis proportionality constant and a q-axis proportionality constant are set with Ld and Lq, respectively, as parameters; when voltage application commands are outputted to three-phase windings of two systems, a d-axis proportionality constant and a q-axis proportionality constant are set with [Ld+Md] and [Lq+Mq], respectively, as parameters.

Abstract: To provide a controller for a rotary machine which can simplify a configuration required for checking the shutoff function of the switching device, and an electric power steering apparatus therewith. A controller for a rotary machine performs a high potential side forcible shutoff which forcibly shuts off a high potential side switching device of a diagnosis object phase in a drive state where the winding current of the diagnosis object phase becomes positive, or a low potential side forcible shutoff which forcibly shuts off a low potential side switching device of the diagnosis object phase in a drive state where the winding current of the diagnosis object phase becomes negative; and determines failure of the device shutoff unit based on a detection value of current or voltage when performing the high potential side forcible shutoff or the low potential side forcible shutoff.

Abstract: When a first medium phase voltage command and a first minimum phase voltage command are close to each other in a first three-phase voltage command, then a first three-phase application voltage is calculated from the first three-phase voltage command by switching from a first calculation process, which corresponds to first two-phase modulation, to a second calculation process, and when a second medium phase voltage command and a second minimum phase voltage command are close to each other in a second three-phase voltage command, a second three-phase application voltage is calculated from the second three-phase voltage command by switching from a third calculation process, which corresponds to first two-phase modulation, to fourth calculation process.

Abstract: Provided is a control device for a rotary machine including: a power feed unit configured to feed electric power in accordance with a power feed command to a rotary machine; a rotation-state detecting unit configured to detect a rotation state of the rotary machine; a torque detecting unit configured to detect an output torque output from the rotary machine; an abnormality determining unit configured to determine an abnormality in the rotation-state detecting unit or the torque detecting unit; and an excitation-command generating unit configured to generate an excitation command for oscillating the rotary machine, in which the power feed command is generated based at least on the excitation command, and the abnormality determining unit is configured to determine the abnormality in the detecting units based on a response of the rotation state and a response of the output torque to the excitation command.

Abstract: Voltage commands of respective phases are substantially equally shifted in such a way that a maximum-phase voltage command coincides with the maximum value of a PWM carrier signal and are compared with the PWM carrier signal, so that a voltage is controlled; in addition to that, a current detection value corresponding to the phase where the lower-arm switching device is turned on is corrected based on a current detection value corresponding to the phase where the upper-arm switching device is turned on.

Abstract: A failure determination device for an angle detector for a rotating machine, including: an angle detector, which includes n pole pairs (n>m), and outputs sine and cosine wave-signals in accordance with a rotational position of a rotating machine including a multi-phase winding and m pole pairs (m?2); and a failure determiner for detecting failure of the detector based on signals from the detector. The detector outputs first and second sine-wave-signals having 180° phases different, and first and second cosine-wave-signals having 180° phases different. The failure determiner determines malfunction of the detector when the failure is determined with use of at least one of: failure determination using a sum of the first and second sine-wave-signals and a sum of the first and second cosine-wave-signals; or failure determination using a sum of squares or a square root of a sum of squares of the sine-wave-signal and the cosine-wave-signal.

Abstract: Includes: a first offset voltage computing section, which is configured to compute, when the three-phase voltage commands are determined as a maximum phase, an intermediate phase, and a minimum phase in descending order, a first offset voltage by subtracting a first DC voltage calculated by multiplying the DC voltage by a first constant from the maximum phase, and to set the first offset voltage to zero when a sign of the first offset voltage is negative; a corrected three-phase voltage command computing section, which is configured to subtract the first offset voltage from each phase of the three-phase voltage commands to output corrected three-phase voltage commands; and an inverter, which is configured to output the three-phase voltages based on the corrected three-phase voltage commands.

Abstract: A control unit for driving a motor mainly includes an input circuit for inputting various kinds of information pieces, an output circuit for driving the coil windings of the motor, an MPU for calculating a control amount based on the information from the input circuit and outputting a control signal to the output circuit; the control unit has two pieces each of the input circuit, the output circuit, and the, and can supply respective electric currents to the windings of the motor or can cut off the supply; the MPUs each have a CPU incorporated therein, a trigger circuit for a trigger signal having a predetermined period; the two CPUs synchronize at least control commands in accordance with the trigger signal and output the control commands.

Abstract: A power conversion device includes an alternating current rotating machine having a multiple of multi-phase windings, a multiple of power conversion means that convert direct current voltage of a direct current power supply based on a multiple of switching signals and apply voltage to the multiple of multi-phase windings, first current detection means that detects a first bus current, which is current flowing between the power conversion means that applies voltage to one multi-phase windings of the multiple of multi-phase windings and the direct current power supply, and first phase current calculation means that calculates the current flowing through the one multi-phase windings based on the first bus current, wherein the first current detection means detects the first bus current at a timing at which a multiple of voltage vectors based on the multiple of switching signals neighbor or coincide.

Abstract: This invention is concerning a controller for an AC rotating machine, this controller having an estimated sum current computing unit configured to output, as estimated sum current, a sum of current of a first winding and current of a second winding when it is determined that the current of the first winding can be detected, and maintain the estimated sum current which has been outputted as a previous value when it is determined that the current of the first winding cannot be detected. When it is determined that the current of the first winding cannot be detected, a first voltage command for the first winding is computed based on an estimated current value of the first winding, which has been calculated by subtracting the current of the second winding detected by the second current detector, from the estimated sum current output from the estimated sum current computing unit.

Abstract: A first offset voltage which is added to voltage commands in a first three-phase voltage command calculated on the basis of a control command for an AC rotary machine, and a second offset voltage which is added to voltage commands in a second three-phase voltage command calculated on the basis of a control command for the AC rotary machine, are set in such a manner that a period during which one of a first power converter and a second power converter outputs an effective vector and the other thereof outputs a zero vector occurs during a carrier period of a first carrier wave signal and a second carrier wave signal.

Abstract: There are arranged a sensor magnet fixed to a rotary shaft and configured to generate a magnetic field for detecting a rotation angle, and a plurality of sensors arranged so as to be opposed to the sensor magnet and each configured to output a sine signal and a cosine signal in accordance with the magnetic field. First and second sensors are arranged on two radial lines different from each other, respectively, out of three radial lines dividing a circumference about the rotary shaft of the sensor magnet into six equal parts. An angle calculation unit is configured to carry out calculation so that 3n-th (n is a natural number) order harmonic components out of odd-order harmonic components of each of the sine signal and the cosine signal output by the first and second sensors cancel one another, to thereby calculate the rotation angle.

Abstract: This invention is concerning connecting members which connect a motor and inverters and which are arranged symmetrically such that magnetic fields produced by three-phase alternating current flowing in the connecting members cancel each other out and are reduced at the position of a magnetic sensor, and furthermore the connecting members are arranged such that Fsum=sin(2?a+?/4)?sin(2?b??/12)+sin(2?c?5?/12), and Fdiff=sin(2?a??/4)?sin(2?b+?/12)+sin(2?c+5?/12) satisfy relationships Fsum<K and Fdiff<K with respect to a predetermined required value K.

Abstract: When a first medium phase voltage command and a first minimum phase voltage command are close to each other in a first three-phase voltage command, then a first three-phase application voltage is calculated from the first three-phase voltage command by switching from a first calculation process, which corresponds to first two-phase modulation, to a second calculation process, and when a second medium phase voltage command and a second minimum phase voltage command are close to each other in a second three-phase voltage command, a second three-phase application voltage is calculated from the second three-phase voltage command by switching from a third calculation process, which corresponds to first two-phase modulation, to fourth calculation process.

Abstract: The invention includes an electric motor that causes a vehicle steering device to rotate, and a control unit that controls the electric motor, wherein the electric motor has a stator including two independent sets of coil winding group, the control unit has a control portion that computes and outputs a control amount and a drive circuit that independently drives each winding group of the electric motor, and the control portion detects a multiple of failures, categorizes the failures into at least two kinds of failure mode, continues control on a normal side after detecting a first failure, and continues control by employing a set in which control nearer to that at a normal time can be carried out, including a past failure, when detecting a second or subsequent failure.

Abstract: Included are: a sensor magnet which rotates integrally with a rotating shaft centering on the rotating shaft, and generates a magnetic field for angle detection which is for detecting the angle of rotation; a first sensor and a second sensor each of which is arranged opposite to the sensor magnet at a position separated in angle by 90 degrees on the circumference centered on the rotating shaft, and outputs a signal corresponding to the magnetic field for angle detection; and an angle calculator that calculates a rotation angle by using the signals from the first sensor and the second sensor.