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公开(公告)号：US20170338734A1
公开(公告)日：2017-11-23
申请号：US15526924
申请日：2015-12-22
发明人： Yukio NAKASHIMA , Takayoshi MIKI
摘要： A power conversion apparatus includes a main capacitor to store therein DC power, and an inverter circuit to convert the DC power stored in the main capacitor to AC power. The main capacitor and a power semiconductor element that constitutes the inverter circuit are connected to each other by a P-side common wire through which a switching current flows. A switching-current shunt component is connected in parallel to the P-side common wire.
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公开(公告)号：US20240275376A1
公开(公告)日：2024-08-15
申请号：US18568294
申请日：2021-06-16
发明人： Yuji NEMOTO , Kohei ONDA , Takayoshi MIKI , Shota MORISAKI
IPC分类号： H03K17/16 , H02M1/00 , H02M1/08 , H02M7/5387
CPC分类号： H03K17/168 , H02M1/0054 , H02M1/08 , H02M7/5387 , H03K17/161
摘要： A control unit of a gate drive circuit applies, between a gate and a source of a switching element, a first voltage so as to turn on the switching element. After transference of drain current of the switching element, the control unit interrupts the first voltage and applies, between the gate and the source of the switching element, a second voltage that is lower than the first voltage and that is higher than a mirror voltage of the switching element. When no short-circuit current is flowing to the switching element, the control unit interrupts the second voltage and applies, between the gate and the source of the switching element, a third voltage higher than the second voltage.
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公开(公告)号：US20220286066A1
公开(公告)日：2022-09-08
申请号：US17628757
申请日：2019-08-01
发明人： Naoki NISHIO , Yasuhiro SHIRAKI , Takayoshi MIKI , Shinsuke KADOI , Hisanori YAMASAKI , Sho KATO , Tetsuo SUGAHARA
摘要： An electric vehicle control device includes a first inverter controlling a first group defined by induction motors, and a second inverter controlling a second group defined by induction motors. The first inverter and the induction motors of the first group are connected to each other by a first conductor. The second inverter and the induction motors of the second group are connected by a second conductor. A first length is equal to or less than three times the average value of a second length and a third length. The first length is an inter-center distance between the first conductor and the second conductor, the second length is the maximum length of a conductor portion of the first conductor in the cross section of the first conductor, and the third length is the maximum length of a conductor portion of the second conductor in the cross section of the second conductor.
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4.发明公开公开(公告)号：US20240235542A1
公开(公告)日：2024-07-11
申请号：US18561732
申请日：2021-05-25
发明人： Yasutaka IMAMURA , Yohei MITSUI , Yukihiko WADA , Takayoshi MIKI
IPC分类号： H03K17/082 , H02M1/08 , H02M7/5387 , H03K17/16
CPC分类号： H03K17/0822 , H02M1/08 , H02M7/53871 , H03K17/165
摘要： A semiconductor device is subjected to ON/OFF control by controlling a gate voltage according to a drive control signal (Ssw). In a turn-on operation for charging a gate in response to transition of drive control signal (Ssw) from a first level (0) to a second level (1), a drive signal (Sdr) is set to first level (0) to discharge the gate at a first time (t1) after end of a Miller period (200) of a gate voltage (Vg), thereby providing a voltage drop period (210) in which gate voltage (Vg) temporarily drops. At a second time (t2), drive signal (Sdr) is again set to second level (1) to start charging the gate.
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公开(公告)号：US20240006976A1
公开(公告)日：2024-01-04
申请号：US18254430
申请日：2020-12-24
发明人： Shinya KURACHI , Takayoshi MIKI , Shota MORISAKI
CPC分类号： H02M1/0009 , H02M1/088
摘要： A gate drive circuit includes a resistor, a current detector that detects a current flowing through the resistor, and a gate driver. The gate driver applies an electric signal between a gate terminal and a source terminal of a module to drive a switching semiconductor element. One end of the resistor is connected to a drain terminal, the opposite end of the resistor is connected to one end of the current detector, and the opposite end of the current detector is connected to the gate driver. The current detector outputs a detection value of the current to the gate driver, and the gate driver changes a gate drive speed of the switching semiconductor element according to the detection value.
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公开(公告)号：US20230223834A1
公开(公告)日：2023-07-13
申请号：US17996536
申请日：2020-06-17
发明人： Takayoshi MIKI , Kohei ONDA
IPC分类号： H02M1/088 , H03K17/687 , H02M7/5395
CPC分类号： H02M1/088 , H02M7/5395 , H03K17/6871
摘要： A power converting device includes upper-arm and lower-arm gate drive circuits which respectively drive upper-arm and lower-arm semiconductor switching elements and which respectively include upper-arm and lower-arm time point detection circuits for detecting time points at which voltages between main terminals of the upper-arm and lower-arm semiconductor switching elements have crossed respective reference voltages, and a controller including a calculator which calculates a change time point of an inverter output voltage and a PWM command pulse generator which generates, on the basis of information about the time point calculated by the calculator, a PWM command pulse to be given to the upper-arm gate drive circuit and the lower-arm gate drive circuit.
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公开(公告)号：US20220231595A1
公开(公告)日：2022-07-21
申请号：US17613697
申请日：2019-05-29
发明人： Yasushi NAKAYAMA , Yoshiko TAMADA , Takayoshi MIKI , Shota MORISAKI , Yukio NAKASHIMA , Kenta UCHIDA , Keisuke KIMURA , Tomonobu MIHARA
摘要： A parallel driving device that drives parallel-connected semiconductor elements includes a control unit and a gate driving circuit. The control unit detects a temperature difference between the semiconductor elements on the basis of detected values by temperature sensors that detect temperatures of the individual semiconductor elements. The control unit generates a control signal for changing the timing at which to turn on a first semiconductor element specified from the semiconductor elements on the basis of the temperature difference. The gate driving circuit generates a first driving signal for driving the semiconductor elements, and generates a second driving signal that is the first driving signal delayed on the basis of the control signal, and applies the second driving signal to the first semiconductor element.
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公开(公告)号：US20190006934A1
公开(公告)日：2019-01-03
申请号：US15745265
申请日：2015-09-03
发明人： Yukio NAKASHIMA , Takayoshi MIKI
IPC分类号： H02M1/08 , H02M7/5387 , H03K17/16
摘要： A power converter includes: a power converter main circuit that includes semiconductor switching elements; gate drive circuits driving the semiconductor switching elements, respectively; and one or a plurality of impedance element groups connected between at least one pair of the gate drive circuits. At least one of the gate drive circuits includes a detector that detects a voltage across the impedance element group, and changes the driving speed of the semiconductor switching elements in accordance with an output of the detector.
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公开(公告)号：US20180241389A1
公开(公告)日：2018-08-23
申请号：US15751982
申请日：2015-09-03
发明人： Yukio NAKASHIMA , Takayoshi MIKI
IPC分类号： H03K17/567 , H03K19/0175 , H02M1/08 , H02M7/538
CPC分类号： H03K17/567 , H02M1/00 , H02M1/08 , H02M3/00 , H02M7/003 , H02M7/48 , H02M7/538 , H03K17/166 , H03K17/7955 , H03K19/017509 , H03K2217/0081
摘要： A power semiconductor module having switching elements includes: a collector main terminal and a collector auxiliary terminal connected to a collector potential of the switching element; a gate auxiliary terminal connected to a gate potential of the switching element; and an emitter main terminal and an emitter auxiliary terminal connected to an emitter potential of the switching element. A power converter includes a voltage dividing circuit board that generates a divided voltage obtained by dividing a voltage between the collector auxiliary terminal and the emitter auxiliary terminal and transmits to a gate driving circuit. The voltage dividing circuit board is electrically connected to the collector auxiliary terminal and the emitter auxiliary terminal. A gate driving circuit changes a driving speed of the switching element according to the divided voltage.
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公开(公告)号：US20170040992A1
公开(公告)日：2017-02-09
申请号：US15303149
申请日：2015-05-27
IPC分类号： H03K17/567 , H01L29/20 , H01L29/16
CPC分类号： H03K17/567 , H01L29/1602 , H01L29/1608 , H01L29/2003 , H02M1/00 , H02M1/08 , H02M1/32 , H02M7/48 , H02M7/53875 , H03K17/04123 , H03K17/063 , H03K17/08122 , H03K17/20 , H03K2017/066
摘要： A driving circuit including: a voltage detector that detects the sum voltage of a positive bias voltage and a negative bias voltage, the negative bias voltage or the positive bias voltage; and a switching element that is connected to the control terminal of a power element and the negative side of a negative-voltage power supply; wherein, when the value of the detection target voltage becomes lower than a voltage setting value or when a voltage between the control terminal and the reference terminal in the power element increases in a state where the value of the detection target voltage is lower than the voltage setting value, the voltage detector turns on the switching element to thereby supply, between the above terminals in the power element, a voltage of 0V or lower.
摘要翻译： 一种驱动电路，包括：电压检测器，其检测正偏置电压和负偏置电压的和电压;负偏置电压或正偏置电压; 以及连接到功率元件的控制端子和负电压电源的负极侧的开关元件; 其中，当所述检测目标电压的值变得低于电压设定值时，或者当所述检测对象电压的值低于所述电压值的状态下，所述功率元件中的所述控制端子与所述基准端子之间的电压增加时 电压检测器接通开关元件，从而在功率元件的上述端子之间提供0V或更低的电压。
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