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1. 发明授权

US11079444B2 Insulation detector and electric apparatus 有权
公开(公告)号：US11079444B2
公开(公告)日：2021-08-03
申请号：US16056600
申请日：2018-08-07
申请人： Mitsubishi Electric Corporation
发明人： Taichiro Tamida , Masayuki Uematsu , Akira Tanabe , Yoshitomo Hayashi , Yoji Tsutsumishita , Kosuke Tsujikawa
IPC分类号： G01R31/52 , G01R27/02 , G01R31/34 , G01R31/12 , G01R27/18
摘要： An insulation detector for highly accurately detecting or measuring, with a simple configuration, insulation resistance of a load or an apparatus to a ground or a housing and connected to an electric apparatus including one or both of an intra-apparatus capacitor and a battery, the insulation detector including an intra-insulation detector capacitor, a voltage detecting unit that detects a voltage of the intra-insulation detector capacitor, and a current-path forming switch for connecting the ground or the housing, the intra-apparatus capacitor, and the intra-insulation detector capacitor in series and forming a current path including insulation resistance of the electric apparatus. The insulation detector measures the insulation resistance by measuring a time constant of a change in the voltage of the intra-insulation detector capacitor. A capacitance value of the intra-insulation detector capacitor is a value negligible in the measurement of the insulation resistance compared with a capacitance value of the intra-apparatus capacitor.

2. 发明授权

US10447172B2 Power regenerative converter and motor control device 有权
公开(公告)号：US10447172B2
公开(公告)日：2019-10-15
申请号：US15573360
申请日：2016-07-21
申请人： Mitsubishi Electric Corporation
发明人： Yoshitomo Hayashi , Yoji Tsutsumishita , Masaya Harakawa , Yuji Nojiri
IPC分类号： H02M7/21 , H02M7/217 , H02M7/219 , H02M5/458 , H02P27/06 , H02K47/04 , H02P9/10 , H02P11/06 , H02P29/024 , H02P29/032 , H02M1/00 , H02M1/32
摘要： A power regenerative converter, includes: a power module configured to include rectifiers and regenerative switches; a smoothing capacitor connected to direct-current power supply terminals, and that accumulates direct-current power during an alternating-current to direct-current conversion; a bus current detector that detects a bus current flowing between either of the direct-current power supply terminals and the smoothing capacitor; a power supply phase detector that detects a phase of an input power supply; a base drive signal generator that generates base drive signals that perform ON/OFF control of the regenerative switching elements based on a power supply phase detected by the power supply phase detection unit; a regeneration controller that performs a start and stop process of a power regenerative operation based on a detection result of the bus current detector and the base drive signals; and an overload detector that detects overload of a power regenerative converter based on the detection result of the bus current detector.

3. 发明授权

US09899907B2 Switching power supply circuit and control method therefor 有权
公开(公告)号：US09899907B2
公开(公告)日：2018-02-20
申请号：US14770178
申请日：2014-03-04
申请人： Mitsubishi Electric Corporation
发明人： Yoshitomo Hayashi , Yoji Tsutsumishita , Tomokazu Ogawa
IPC分类号： H02M1/36 , H02M3/335 , G05F1/577 , H02M1/08
CPC分类号： H02M1/36 , G05F1/577 , H02M1/08 , H02M3/335 , H02M3/33561
摘要： A switching power supply circuit includes a switching element connected to a primary winding wire of a transformer in series, capacitors connected to secondary winding wires of the transformer via diodes, and an IC for power supply control that controls ON/OFF operation of the switching element on the basis of a charged voltage of the capacitors. Commanded voltages are charged in the capacitors after electric power is supplied to a main power supply, and further, after the elapse of a delay time set in advance, a control circuit, which controls the entire apparatus, controls a main circuit and a peripheral apparatus circuit to start operations.

4. 发明授权

US09712155B2 Drive circuit for power semiconductor element 有权
公开(公告)号：US09712155B2
公开(公告)日：2017-07-18
申请号：US14898488
申请日：2013-06-24
申请人： Mitsubishi Electric Corporation
发明人： Yoshitomo Hayashi , Masahiro Ozawa , Toshiki Tanaka
IPC分类号： H03K17/30 , H03K17/60 , H02M1/44 , H03K17/16 , H02M1/00
CPC分类号： H03K17/60 , H02M1/44 , H02M2001/0054 , H03K17/162 , H03K17/168 , H03K2217/0036 , Y02B70/1491
摘要： A drive circuit for a power semiconductor element includes: a voltage-command generation unit that generates a voltage command VGEref, which is a charge command between the gate and emitter terminals of a power semiconductor element; and a subtracter that calculates a deviation voltage Verr between the voltage command VGEref and the voltage between the gate and emitter terminals. The drive circuit also includes: a gate current controller that is input with the deviation voltage Verr and calculates a gate-current command voltage VIGref for determining the gate current that is caused to flow to the gate terminal of the power semiconductor element; a gate-current command limiter that limits the gate-current command voltage VIGref; and a gate-current supply device that is input with an actual gate-current command voltage VIGout and that supplies a gate current to the gate terminal of the power semiconductor element.

5. 外观设计

USD943526S1 Converter 有权
公开(公告)号：USD943526S1
公开(公告)日：2022-02-15
申请号：US29743816
申请日：2020-07-24
申请人： Mitsubishi Electric Corporation
设计人： Daisuke Goto , Yoshitomo Hayashi , Yusuke Ono , Takeshi Obara

6. 发明授权

US11095244B2 Motor drive device and motor drive system 有权
公开(公告)号：US11095244B2
公开(公告)日：2021-08-17
申请号：US16959439
申请日：2019-02-19
申请人： Mitsubishi Electric Corporation
发明人： Satoshi Taira , Yoshitomo Hayashi
IPC分类号： H02P27/08 , H02M5/458
摘要： A motor drive device receiving AC power supplied from an AC source and driving a motor includes: a converter circuit converting the AC power into DC power; an inverter circuit converting the DC power into AC power to drive the motor; and a current detector detecting input current flowing on the AC side of the converter circuit. The motor drive device also includes a converter device and an inverter device. The converter device includes a control unit performing control such that input current or input power supplied to the converter circuit does not exceed an upper limit, based on a value detected by the current detector. The inverter device includes a control unit detecting voltage of a DC bus connecting the converter circuit and the inverter circuit, and limiting the output power of the inverter circuit when a detection value of the bus voltage decreases to a set lower limit.

7. 发明授权

US10813255B2 Motor drive device 有权
公开(公告)号：US10813255B2
公开(公告)日：2020-10-20
申请号：US16315029
申请日：2017-12-26
申请人： Mitsubishi Electric Corporation
发明人： Yoshitomo Hayashi , Satoru Kozuka , Yasuhiro Takadera , Takeshi Obara
IPC分类号： H05K7/20 , H05K1/02 , H02K11/33 , H05K1/18
摘要： A motor drive device provided to a control panel to drive a plurality of motors includes a plate-shaped fin base that includes a first plate surface and a second plate surface, and a plate-shaped heat radiator that is thermally connected to the first plate surface and is provided with a first normal to its plate surface intersecting a second normal to the first plate surface. The motor drive device also includes a semiconductor device that drives a first motor and is thermally connected to the heat radiator, a semiconductor device that drives a second motor and is thermally connected to the first plate surface, and fins that are thermally connected to the second plate surface opposite from the first plate surface of the fin base and are provided in an air passage formed in the control panel.

8. 发明授权

US10416224B2 Insulation detector and electric apparatus 有权
公开(公告)号：US10416224B2
公开(公告)日：2019-09-17
申请号：US14902434
申请日：2014-10-28
申请人： Mitsubishi Electric Corporation
发明人： Taichiro Tamida , Masayuki Uematsu , Akira Tanabe , Yoshitomo Hayashi , Yoji Tsutsumishita , Kosuke Tsujikawa
IPC分类号： G01R31/12 , G01R27/02 , G01R31/02 , G01R31/34 , G01R27/18
摘要： An insulation detector for highly accurately detecting or measuring, with a simple configuration, insulation resistance of a load or an apparatus to a ground or a housing and connected to an electric apparatus including one or both of an intra-apparatus capacitor and a battery, the insulation detector including an intra-insulation detector capacitor, a voltage detecting unit that detects a voltage of the intra-insulation detector capacitor, and a current-path forming switch for connecting the ground or the housing, the intra-apparatus capacitor, and the intra-insulation detector capacitor in series and forming a current path including insulation resistance of the electric apparatus. The insulation detector measures the insulation resistance by measuring a time constant of a change in the voltage of the intra-insulation detector capacitor. A capacitance value of the intra-insulation detector capacitor is a value negligible in the measurement of the insulation resistance compared with a capacitance value of the intra-apparatus capacitor.

9. 发明授权

US09570972B2 CR snubber circuit 有权
标题翻译： CR缓冲电路
公开(公告)号：US09570972B2
公开(公告)日：2017-02-14
申请号：US14364363
申请日：2013-10-02
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： Mitsuhiko Kanda , Shizuri Tamura , Akira Hatai , Yasuhiro Sekimoto , Yuji Nojiri , Yoshitomo Hayashi
IPC分类号： H02H9/04 , H02M1/34 , H02M1/32 , H02H7/122
CPC分类号： H02M1/34 , H02H7/122 , H02H9/045 , H02M1/32 , H02M2001/346 , H02M2001/348
摘要： A CR snubber circuit capable of increasing a reduction effect of the effective inductance component and suppressing a ringing component generated at the time of switching the switching element is obtained. A first current path formed on one surface of the substrate and a second current path formed on the other surface, which is the opposite side of the one surface of the substrate, are opposed to each other with the substrate being sandwiched therebetween, and the capacitor 5 and the resistor 6 are arranged such that current flows in opposite directions in the first current path and the second current path, and a band elimination filter is formed by the capacitor 5, the resistor 6, and an effective inductance component obtained by coupling an inductance component included in the first current path and an inductance component included in the second current path.
摘要翻译：获得能够增加有效电感分量的减小效果并抑制在切换开关元件时产生的振铃分量的CR缓冲电路。形成在基板的一个表面上的第一电流路径和形成在基板的一个表面的相反侧的另一个表面上的第二电流路径彼此相对，并且电容器 5和电阻器6被布置成使得电流在第一电流路径和第二电流路径中沿相反方向流动，并且通过电容器5，电阻器6以及通过将电阻器6耦合而获得的有效电感分量形成带阻滤波器包括在第一电流路径中的电感分量和包括在第二电流路径中的电感分量。

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