Patent application number | Description | Published |
20120275202 | SERIES MULTIPLEX POWER CONVERSION APPARATUS - A series multiplex power conversion apparatus includes a plurality of phases. Each of the plurality of phases includes a plurality of power conversion cells coupled in series to each other. Each of the plurality of power conversion cells includes a current detector configured to detect a current through one phase among the plurality of phases corresponding to the current detector. Each of the plurality of power conversion cells is configured to independently stop a power conversion operation based on the current detected by the current detector. | 11-01-2012 |
20130107589 | POWER CONVERSION DEVICE | 05-02-2013 |
20130328309 | MATRIX CONVERTER APPARATUS FOR WIND-POWER GENERATION, METHOD FOR CONTROLLING MATRIX CONVERTER, WIND-POWER GENERATOR APPARATUS, WIND FARM, AND METHOD FOR MANUFACTURING WIND TURBINE - A matrix converter apparatus for wind-power generation according to an embodiment includes a matrix converter and a controller. The controller adds information about a voltage phase of the power grid or information about a voltage phase of the generator to a power-grid-side power factor to generate information about a current phase, and generates a control signal for controlling the matrix converter based on the information about the current phase. | 12-12-2013 |
20140117917 | MATRIX CONVERTER - A matrix converter includes: a power conversion unit provided between an AC power supply and a rotational machine; and a controller for performing power conversion control therebetween by controlling the power conversion unit. The power conversion unit includes multiple bidirectional switches each of which has at least one first directional switching element and at least one second directional switching element. Further, the controller includes a first drive control unit performing the power conversion by simultaneously turning on both of the first directional switching element and the second directional switching element, and a second drive control unit performing the power conversion by turning on one of the first directional switching element and the second directional switching element. | 05-01-2014 |
20140160824 | MATRIX CONVERTER AND METHOD FOR CONTROLLING MATRIX CONVERTER - A matrix converter according to an embodiment includes a plurality of bidirectional switches and a controller. The bidirectional switches connect each of phases of an alternating current (AC) power supply with each of phases of a rotary electric machine. The controller controls the bidirectional switches to perform power conversion control between the AC power supply and the rotary electric machine. The controller performs on/off control individually on a plurality of unidirectional switching elements constituting the bidirectional switches by using both 120-degree conduction control and PWM control. | 06-12-2014 |
20140268970 | MATRIX CONVERTER AND METHOD FOR CONTROLLING MATRIX CONVERTER - A matrix converter according to an embodiment includes a power converter having a plurality of bidirectional switches, a controller, and a current detector. The controller controls the power converter. The correct detector detects a current flowing to an output side of the power converter. The controller extracts a high-frequency component contained in the current detected by the current detector, adjusts an output current reference on the basis of the high-frequency component, and controls the power converter on the basis of the adjusted output current reference. | 09-18-2014 |
20150188443 | MATRIX CONVERTER, WIND POWER GENERATION SYSTEM, AND METHOD FOR CONTROLLING MATRIX CONVERTER - A matrix converter according to embodiments includes a power conversion unit and drive controllers. The power conversion unit includes a plurality of bidirectional switches for connecting each phase of an alternating-current (AC) power supply with each phase of a rotary electric machine. When the voltage of the AC power supply is a predetermined value or less, the drive controllers control the power conversion unit to supply reactive power from the power conversion unit to the AC power supply and to control the torque of the rotary electric machine. | 07-02-2015 |
20150280597 | POWER CONVERTING APPARATUS, CONTROL DEVICE OF POWER CONVERTING APPARATUS, AND CONTROL METHOD OF POWER CONVERTING APPARATUS - A power converting apparatus includes a power converter, a controller, and a filter. Further, the controller includes a command generator, an estimator, a voltage error calculator, and an output voltage controller. The command generator is configured to generate an output voltage command. The estimator is configured to estimate the output voltage based on an output current of the power converter. The voltage error calculator is configured to calculate a voltage difference between the output voltage command and the estimated output voltage. The output voltage controller is configured to control the output voltage to suppress a resonance of the filter based on the voltage difference. | 10-01-2015 |