公开(公告)号：US20170040992A1

公开(公告)日：2017-02-09

申请号：US15303149

申请日：2015-05-27

申请人： Mitsubishi Electric Corporation

发明人： Kosuke NAKANO ,  Keisuke IWASAWA ,  Takayoshi MIKI ,  Hiroshi NAKATAKE

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。

公开(公告)号：US20210055007A1

公开(公告)日：2021-02-25

申请号：US16968970

申请日：2018-03-19

申请人： MITSUBISHI ELECTRIC CORPORATION

发明人： Yoshikazu YAJI ,  Shigetoshi IPPOSHI ,  Naoki SUETOMI ,  Ryuji MOMOSE ,  Keisuke IWASAWA ,  Kentaro YONEHARA ,  Hayato KURINO

IPC分类号： F24F1/24 ,  F24F1/48 ,  F24F13/20 ,  F24F1/56 ,  F24F11/88 ,  F24F13/08

摘要： Provided is a cooling structure, including: a heat sink to be mounted to a heat generator; and a duct, which is mounted to the heat sink, and is configured to guide an air flow flowing around the heat sink to the heat sink, wherein the heat sink has an air flow passage configured to allow the air flow to pass through the air flow passage, wherein one end side of the duct is to be mounted to an upstream side of the air flow passage, and wherein another end side of the duct is to be extended from an upstream end portion of the air flow passage to an upstream side of the air flow. With this, the flow rate of the air flow passing through the air flow passage of the heat sink can be increased, and the cooling efficiency of the heat sink can be improved.

公开(公告)号：US20180159439A1

公开(公告)日：2018-06-07

申请号：US15735987

申请日：2016-07-14

申请人： Mitsubishi Electric Corporation

发明人： Yasushige MUKUNOKI ,  Yasushi NAKAYAMA ,  Hiroyasu IWABUKI ,  Yuki ISHII ,  Keisuke IWASAWA

IPC分类号： H02M5/458 ,  H02M7/217 ,  H02M7/5387 ,  G05F1/10 ,  H03K7/08 ,  H02M1/42

摘要： A diode rectifier rectifies an AC voltage output from a neutral-grounding three-phase AC power supply to a DC voltage. A smoothing capacitor smoothes the DC voltage rectified by the diode rectifier. An inverter converts the DC voltage smoothed by the smoothing capacitor into a desired AC voltage. A bidirectional switch and a Y capacitor are connected in series between one end of the smoothing capacitor and the ground. A detector detects a voltage across both ends of the smoothing capacitor. A controller drives the bidirectional switch in response to an output of the detector.