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1. 发明申请

US20230129370A1 POWER CONVERSION DEVICE 有权
公开(公告)号：US20230129370A1
公开(公告)日：2023-04-27
申请号：US17716210
申请日：2022-04-08
申请人： Mitsubishi Electric Corporation
发明人： Kado NAKAGAWA , Jino Yoon , Nobuhiro Kihara , Mai Nakada
IPC分类号： H02M1/32 , H03K17/687 , H03K17/06 , G01R31/3835 , H03K17/60
摘要： Provided is a technology in which a control device of a converter performs gate cutoff for cutting off power supply to a load when one of a battery detection value obtained by a battery voltage sensor or a low-voltage-side detection value obtained by a low-voltage-side voltage sensor or both thereof are abnormal values. After the control device performs the gate cutoff, the control device determines whether or not a main body circuitry is abnormal based on the battery detection value and the low-voltage-side detection value. When the control device determines that the main body circuitry is not abnormal, the control device determines whether one of the battery voltage sensor or the low-voltage-side voltage sensor is abnormal based on the battery detection value, the low-voltage-side detection value, and a high-voltage-side detection value obtained by a high-voltage-side voltage sensor.

2. 发明授权

US10910950B2 Power conversion device 有权
公开(公告)号：US10910950B2
公开(公告)日：2021-02-02
申请号：US16608947
申请日：2017-05-08
申请人： Mitsubishi Electric Corporation
发明人： Nobuhiro Kihara , Yuta Komatsu , Takashi Kaneyama , Masaki Sawamura , Noriyuki Wada , Yuya Tanaka
IPC分类号： H02M3/158 , G01R19/165 , G05F1/565 , G05F1/595 , H02M1/32 , H02M1/00
摘要： A power conversion device including an intermediate capacitor that carries out a charging and discharging operation and a voltage sensor that detects a voltage of the intermediate capacitor, and including a current sensor that detects a current flowing in a reactor, and an abnormality determining unit that determines that there is an abnormality of the voltage sensor using a current value calculated based on a detected value from the current sensor, wherein a gain error, an offset error, and a sticking error of the voltage sensor can be detected.

3. 发明授权

US10090760B2 DC-DC voltage conversion device 有权
公开(公告)号：US10090760B2
公开(公告)日：2018-10-02
申请号：US15431913
申请日：2017-02-14
申请人： Mitsubishi Electric Corporation
发明人： Masaru Kobayashi , Matahiko Ikeda , Nobuhiro Kihara , Kazuhiko Otsuka , Junichi Abe
IPC分类号： H02M3/00 , H02M3/158 , H02J7/00 , H02M1/32 , H02M1/00
摘要： In a DC-DC voltage conversion device, overheat of a diode element connected in anti-parallel with a semiconductor switching element is a problem, and in order to resolve this, a temperature of a semiconductor switching element of a main conversion circuit is detected, a temperature of a diode element connected in parallel with the semiconductor switching element is calculated using a correction calculation of the detected semiconductor switching element temperature value in accordance with a step-up ratio of the DC-DC voltage conversion device, and diode element overheat protection is carried out in accordance with the calculated temperature value.

4. 发明授权

US09893620B2 Control apparatus and control method for DC/DC converter capable of bidirectional power transfer 有权
公开(公告)号：US09893620B2
公开(公告)日：2018-02-13
申请号：US15259688
申请日：2016-09-08
申请人： Mitsubishi Electric Corporation
发明人： Matahiko Ikeda , Mai Uenaka , Yuta Komatsu , Ryota Kondo , Masaru Kobayashi , Nobuhiro Kihara , Naoki Moritake
IPC分类号： H02M3/158 , H02M1/08 , H02M1/14 , H02M1/00
CPC分类号： H02M3/158 , H02M1/08 , H02M1/14 , H02M3/07 , H02M3/1584 , H02M2001/0009 , H02M2001/0025
摘要： An object of this invention is to obtain a control apparatus and a control method for a DC/DC converter, with which a DC/DC converter can be controlled with superior stability and responsiveness while reducing the size of a storage medium. A calculation value is calculated in accordance with a specific control method using a differential voltage between a target output voltage and an output voltage, whereupon a control calculation value is calculated from the calculation value and an input voltage.

5. 发明授权

US09407143B2 Vehicle power-supply unit 有权
标题翻译：车辆电源单元
公开(公告)号：US09407143B2
公开(公告)日：2016-08-02
申请号：US14052419
申请日：2013-10-11
申请人： Mitsubishi Electric Corporation
发明人： Takayuki Ubukata , Nobuhiro Kihara
IPC分类号： H02M3/158 , B60L11/18 , H02M3/156 , B60L11/14
CPC分类号： H02M3/158 , B60L11/14 , B60L11/18 , B60L2210/10 , B60L2270/20 , H02M3/156 , H02M3/1588 , Y02T10/70 , Y02T10/7077 , Y02T10/7216
摘要： A vehicle power-supply unit has chargeable and rechargeable first power supply and second power supply connected to a voltage transducer at input and output terminals, respectively, and a switch element connected between the output terminal of the voltage transducer and the second power supply. By controlling a rector current flown through a reactor connected to at least two switching elements at one end when the voltage transducer is started, a capacitor connected between the other end of the reactor and the ground is charged, and the switch element is brought in a connection state according to a charging voltage of the capacitor and a voltage value of the second power supply. Consequently, a vehicle power-supply unit can protect the elements by preventing a rush current during a backflow and reverse connection and at start-up.
摘要翻译：车辆电源单元分别具有可充电和可再充电的第一电源和第二电源，分别连接到输入和输出端子处的电压换能器，以及连接在电压换能器的输出端子和第二电源之间的开关元件。通过控制在电压换能器起动时在一端流过与至少两个开关元件连接的电抗器的反馈电流，连接在电抗器的另一端与地之间的电容器被充电，并将开关元件置于根据电容器的充电电压和第二电源的电压值的连接状态。因此，车辆电源单元可以通过在回流和反向连接期间以及启动时防止冲击电流来保护元件。

6. 发明授权

US10554120B2 Power conversion device 有权
公开(公告)号：US10554120B2
公开(公告)日：2020-02-04
申请号：US16411800
申请日：2019-05-14
申请人： Mitsubishi Electric Corporation
发明人： Kazuhiro Fujioka , Nobuhiro Kihara , Mai Nakada , Yoshihiro Takeshima , Yujiro Nakada
IPC分类号： H02M1/32 , H02M3/335 , H02M1/00 , H02M3/158 , G05F1/565
摘要： [Technical Problem] In a power conversion device for stepping up or stepping down the input voltage, when voltage converter become out of order, it is not possible to specify an IGBT element and a current sensor, which is in an extraordinary fault condition.[Solution to Problem] The power conversion device is configured to detect a voltage value of a smoothing condenser, connected in parallel to a load, where the load is to be connected to the power conversion device; detects, by a first current sensor, a current which flows through switching elements in a plurality of voltage converter; decides an abnormality of a switching element, by switching the switching element one by one; specifies the abnormality of the switching element; and specifies that the first current sensor is in an abnormal state, in a case where there is no abnormal state switching elements.

7. 发明授权

US11025165B2 DC/DC converter control device 有权
公开(公告)号：US11025165B2
公开(公告)日：2021-06-01
申请号：US16610579
申请日：2017-06-09
申请人： Mitsubishi Electric Corporation
发明人： Kazushi Maeda , Masaki Sawamura , Hiroaki Tanihara , Nobuhiro Kihara , Yuta Komatsu , Takashi Kaneyama
IPC分类号： H02P1/18 , H02M3/158 , H02M1/32 , H02P7/292
摘要： With respect to a failure in voltage sensors each for detecting a high-voltage-side voltage in a DC/DC converter, it is so arranged that a circuit failure of the DC/DC converter is prevented, and that the DC/DC converter is continuingly controlled. Two voltage sensors are included therein each for detecting a high-voltage-side voltage, so that, even when a first voltage sensor for detecting a high-voltage-side voltage on one side fails to work properly, a control device turns on a second switching device, and detects a voltage by a second voltage sensor for detecting the high-voltage-side voltage on the other side, whereby a failure of the voltage sensor for detecting the high-voltage-side voltage is detected.

8. 发明授权

US09893619B2 DC/DC converter 有权
公开(公告)号：US09893619B2
公开(公告)日：2018-02-13
申请号：US15249714
申请日：2016-08-29
申请人： Mitsubishi Electric Corporation
发明人： Nobuhiro Kihara , Noriyuki Wada , Mitsuyasu Kunihiro , Makoto Akashi , Yuta Komatsu , Satoshi Murakami , Yoshihiro Takeshima
IPC分类号： H02M3/158 , H02M1/36 , H02P7/00
CPC分类号： H02M3/158 , H02M1/36 , H02P1/18 , H02P7/00
摘要： A DC/DC converter in which a both-end voltage of each of capacitors can be safely uniformalized while an over current, which is passed through between the capacitors composing the DC/DC converter, is prevented. In a DC/DC converter which includes a plurality of switching elements, a reactor, a low-voltage side capacitor, a high-voltage side capacitor, a charge-discharge capacitor, and a controller which drives and controls the switching elements, the controller performs soft start control in which a duty ratio of at least one of the switching elements is gradually varied from 0% to 100%, and the switching element, in which the soft start control is not performed during the term of the soft start control, is turned off.

9. 发明授权

US09024605B2 Power supply device including a second DC power supply in its load circuit 有权
标题翻译：电源装置在其负载电路中包括第二直流电源
公开(公告)号：US09024605B2
公开(公告)日：2015-05-05
申请号：US13968096
申请日：2013-08-15
申请人： Mitsubishi Electric Corporation
发明人： Nobuhiro Kihara , Isao Yoneda , Toru Daigo
IPC分类号： G05F1/00 , H02M1/14 , H02M1/32 , H02M3/155
CPC分类号： H02M1/14 , H02M1/32 , H02M3/155
摘要： The size of a reactor is reduced in a power supply device whose load circuit includes a second DC power supply. A power supply device includes: a chopper circuit CH connected between a first DC power supply E1 and load circuit L; and a filter circuit FI that includes a filter coil L2 and filter capacitor C and is interposed between the first DC power supply E1 and chopper circuit CH or between the second DC power supply E2 and chopper circuit CH; wherein the DC-current-inductance characteristic curve of the filter coil L2 and DC-current-inductance characteristic curve of the reactor L1 intersect each other, and the inductance value of the reactor L1 is made larger than that of the filter coil L2 in the region of current lower than a current value at the intersecting point.
摘要翻译：在负载电路包括第二直流电源的电源装置中，电抗器的尺寸减小。电源装置包括：连接在第一直流电源E1和负载电路L之间的斩波电路CH; 以及包括滤波器线圈L2和滤波电容器C并被插入在第一直流电源E1和斩波电路CH之间或第二直流电源E2与斩波电路CH之间的滤波电路FI; 其中，电抗器L1的滤波线圈L2和直流电流 - 电感特性曲线的直流电流 - 电感特性曲线彼此相交，使电抗器L1的电感值大于滤波器线圈L2的电感值电流区域低于交点处的电流值。

10. 发明申请

US20200007027A1 POWER CONVERSION DEVICE 审中-公开
公开(公告)号：US20200007027A1
公开(公告)日：2020-01-02
申请号：US16411800
申请日：2019-05-14
申请人： Mitsubishi Electric Corporation
发明人： Kazuhiro FUJIOKA , Nobuhiro Kihara , Mai Nakada , Yoshihiro Takeshima , Yujiro Nakada
IPC分类号： H02M1/32 , H02M3/335
摘要： [Technical Problem] In a power conversion device for stepping up or stepping down the input voltage, when voltage converter become out of order, it is not possible to specify an IGBT element and a current sensor, which is in an extraordinary fault condition.[Solution to Problem] The power conversion device is configured to detect a voltage value of a smoothing condenser, connected in parallel to a load, where the load is to be connected to the power conversion device; detects, by a first current sensor, a current which flows through switching elements in a plurality of voltage converter; decides an abnormality of a switching element, by switching the switching element one by one; specifies the abnormality of the switching element; and specifies that the first current sensor is in an abnormal state, in a case where there is no abnormal state switching elements.

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