| Patent application number | Description | Published |
|---|
| 20090251086 | MOTOR CONTROL UNIT - A motor control unit ( | 10-08-2009 |
| 20090256161 | POWER CONVERSION APPARATUS - In the case where a chip is made of wide band gap semiconductor, a power conversion apparatus is obtained in which a component having a low heat resistant temperature is prevented from receiving thermal damage by heat generated at the chip. In a configuration including: a chip portion ( | 10-15-2009 |
| 20100309700 | POWER CONVERTER - An inverter circuit ( | 12-09-2010 |
| 20110026285 | BIDIRECTIONAL SWITCH CIRCUIT AND POWER CONVERTER INCLUDING THE SAME - A bidirectional switch circuit includes two switching elements connected to conduct a current in both directions. The two switching elements are connected in series to each other. Of the two switching elements, the switching element to which a reverse voltage is applied, a voltage of a source of one of the switching elements being higher than a voltage of a drain of the one, is configured to conduct a current from the source to the drain even when an on-drive signal is not being input to a gate terminal of the one. | 02-03-2011 |
| 20120182770 | POWER CONVERTER - The power converter includes a diode rectifier which rectifies alternating current power output from an alternating current power supply, a reactor provided between the alternating current power supply and the diode rectifier, an inverter circuit to which power output from the diode rectifier is directly supplied, and a capacitor provided between power supply lines on a primary side of the diode rectifier. | 07-19-2012 |
| 20120255318 | REFRIGERATION APPARATUS - A refrigeration apparatus includes a refrigerant circuit having a main circuit performing a refrigeration cycle and a branch circuit which branches part of high-pressure liquid refrigerant flowing through the main circuit and leads the part of high-pressure liquid refrigerant from a high-pressure part of the main circuit to part of the main circuit having a pressure lower than that of the high-pressure part. The branch circuit is connected to a cooler configured to cool a power element(s) of a power supply device supplying power to drivers of components of the refrigerant circuit by refrigerant. In the refrigeration apparatus, an adjusting mechanism configured to adjust the state of refrigerant flowing through the branch circuit and adjust the temperature of refrigerant passing through the cooler to a target temperature is provided. | 10-11-2012 |
| 20120279251 | REFRIGERATION APPARATUS - A refrigeration apparatus includes: a refrigerant circuit to which a compressor is connected, and which performs a refrigerating cycle; an electronic part including a power module; and a cooling member in which a refrigerant of the refrigerant circuit flows, and which contacts the power module so that the power module is cooled by the refrigerant. The cooling member of the refrigeration apparatus is provided with a thermal insulation layer that prevents cold heat of the refrigerant flowing in the cooling member from being transferred to the outside from at least a non-contact surface other than a contact surface of the cooling member with the power module. | 11-08-2012 |
| 20120293290 | COOLING STRUCTURE FOR MAGNET-EQUIPPED REACTOR - A cooling structure for a magnet-equipped reactor includes: a magnet-equipped reactor having a core around which a coil is wound, and a magnet arranged to contact the core; and a cooling member arranged to contact the magnet of the magnet-equipped reactor to cool the magnet. | 11-22-2012 |
| 20130300327 | POWER CONVERSION APPARATUS - A DC link is provided, which includes a capacitor connected in parallel to an output of a converter circuit, and outputs a pulsating DC link voltage. An inverter circuit is provided, which converts an output of the DC link to AC by switching, and supplies the AC to a motor connected thereto. A controller is provided, which controls switching of the inverter circuit so that motor currents pulsate in synchronization with pulsation of a power-supply voltage. The controller controls the switching of the inverter circuit in accordance with a load of the motor or an operational state of the motor, and reduces pulsation amplitude of the motor currents. | 11-14-2013 |
| 20130300334 | POWER CONVERSION APPARATUS - A power conversion apparatus is equipped with switching devices to perform power conversion of input AC power supplied from an AC power supply to output AC power having a predetermined voltage and a predetermined frequency, and to supply the power to a motor connected thereto. The apparatus includes a controller controlling switching of the switching devices, a capacitor smoothing a ripple generated by the switching of the switching devices, a current controller controlling a current flowing to the motor, and a voltage distortion corrector detecting a harmonic component caused by distortion in motor input power, and superimposing compensation values on an output of the current controller in accordance with a value of the harmonic component. | 11-14-2013 |
| 20140232309 | POWER CONVERTER - In a power converter, vibration and noise of a motor due to pulsation of a direct current link voltage are reduced. An inverter circuit is provided, which is configured to convert a direct current link voltage having a pulsating component to an alternating current to output the alternating current to a permanent magnet synchronous motor. A controller is provided, which is configured to control the inverter circuit by vector control and which, in a control state in which fundamental voltage vectors do not include a zero vector (voltage vector for which a motor terminal voltage is zero), performs such control that the phase of a resultant voltage vector of a d-axis voltage vector and a q-axis voltage vector of the permanent magnet synchronous motor varies depending on pulsation. | 08-21-2014 |
