Mitsubishi Electric Corporation

Daiki Matsuura

Noriyuki Wada

Takahiko Kobayashi

Kiyoharu Anzai

Yasufumi Ogawa

Yoshihiko Kimpara

Masahiro Iezawa

Kotaro Nakano

Jun Kitagawa

Keiichi Shirasuka

Soichiro Matsumoto

Tomoya Tachibana

Hideaki Kawamoto

Hirofumi Fujii

Hiroyuki Kobayashi

Satoko Miki

Jun Yukawa

Satoru Tokuyama

Kensuke Ueda

Tadashi Sakaguchi

Minoru Sota

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.

Synchronous machine drive control device, and vehicle equipped with synchronous machine subjected to drive control by said synchronous machine drive control device

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.

Electric motor control device

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.

Rotating-electric-machine control apparatus

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.

Synchronous machine control device and method of controlling the synchronous machine control device

Provided is a control device for a permanent magnet-type rotating electrical machine (), which includes a current coordinate transformation unit () 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 (), a current correction direction calculation unit () 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 () 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.

Control device for permanent magnet-type rotating electrical machine

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.

Motor control device and motor control method

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.

Synchronous machine controller

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.

AC rotary machine controller

In a control device for an electric motor (), a three-phase/two-phase conversion section () 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 () calculates average values of those values. A difference calculation section () 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 () performs low-pass filtering on each difference, and outputs d-axis and q-axis current correction values. A correction calculation section () performs a linear operation of each k-th current value and the corresponding current correction value, and outputs the corrected current values.

Control device for an electric motor

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.

Method of controlling rotary electric machine

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.

Controller for rotary electric machine drive apparatus

A synchronous machine control device is provided with a magnet state outputter that estimates a magnetic flux of a permanent magnet forming the magnetic field of a synchronous machine. In a magnet state correction value calculation mode, the magnet state outputter calculates a magnet state correction value. In a magnet state estimation mode, the magnet state outputter obtains, from a magnet state estimation device, a magnetic flux estimation value of the permanent magnet under a given condition of a magnetic flux command and a &#x3b4;-axis current command and controls a magnet state corrector to correct the magnetic flux estimation value of the permanent magnet obtained by the magnet state estimation device, by use of the magnet state correction value.

Synchronous machine control device

A synchronous machine control apparatus for correcting a rotor position error that is a difference between a rotor position of a synchronous machine and a rotor position detected by a position detection unit is provided with a current control device for performing control in such a way that respective current command values and respective current detection values in a generation direction (&#x3b3; axis) of an armature interlinked magnetic flux and in a direction perpendicular (&#x3b4; axis) to the generation direction of the armature interlinked magnetic flux coincide with each other and with a magnetic flux calculation device for calculating a phase of an armature interlinked magnetic flux, based on an armature current detection value of the synchronous machine and an armature voltage command value therefor; the rotor position error is corrected based on the &#x3b3;&#x3b4;-axis current command values and a phase of the armature interlinked magnetic flux.

Synchronous machine control apparatus

A synchronous machine controller includes a position detecting unit that detects a position of a rotor, a current detecting unit that detects an armature current, a current command generating unit that generates first and second current commands, a voltage command generating unit that generates a voltage command on the basis of the current commands, the position of the rotor, and the armature current, a power converting unit that outputs a voltage to the synchronous machine on the basis of the voltage command, a magnetic flux estimating unit that estimates an armature interlinkage flux on the basis of a rotational velocity calculated from a variation of the position of the rotor, the voltage command, and the armature current, and a magnet state estimating unit that estimates a magnetic flux or a temperature of the permanent magnet from the position of the rotor, the armature current, and the armature interlinkage flux.

Disclosed is a digital broadcast reception device that includes a plurality of tuner/demodulator units; a tuning control unit; a current position detection unit for detecting a current position; a channel scan control unit that has one of the plurality of tuner/demodulator units perform tuning for program viewing or listening, and has another one of the plurality of tuner/demodulator units perform a channel scan by tuning to the physical channels sequentially and detecting receivable physical channels; a broadcast area map generation unit for generating broadcast area maps including the receivable physical channels when the channel scan is executed, broadcast service information regarding broadcast content of the physical channels, and receivable position information; and a broadcast area map storage unit for storing the generated broadcast area maps.

Growing community of inventors

Tokyo, Japan

Daiki Matsuura