公开(公告)号：US11277125B2

公开(公告)日：2022-03-15

申请号：US16932143

申请日：2020-07-17

Applicant: DENSO CORPORATION

Inventor： Kazunori Watanabe

IPC: H03K17/30 ,  H02M3/07 ,  H03K17/567 ,  H03K17/687

Abstract: A drive circuit drives driven switches connected in parallel with one another. The driven switches each include first, second main, and main control terminals. When a potential difference of the main control terminal with respect to the second main terminal becomes greater than or equal to a threshold voltage, the flow of current between the first and second main terminals is permitted. At least two driven switches have different threshold voltages. The drive circuit includes, for each driven switch, an electrical path electrically connecting the second main terminal or a negative voltage supply, which is at a negative voltage lower than the potential of the second main terminal, to the main control terminal. The impedance of each of the electrical paths is set so the potential difference increased by electric charge flowing into the electrical path through a parasitic capacitance of the driven switch becomes less than the threshold voltage.

公开(公告)号：US09041457B2

公开(公告)日：2015-05-26

申请号：US14159636

申请日：2014-01-21

Applicant: DENSO CORPORATION

Inventor： Jyunji Miyachi ,  Tsuneo Maebara ,  Kazunori Watanabe

IPC: H03K17/74 ,  H03K17/10

CPC classification number: H03K17/107 ,  H03K17/74

Abstract: An electronic apparatus includes a switching element which has a control terminal and is driven by controlling voltage of the control terminal, a driving power supply circuit which supplies voltage required for driving the switching element, an on-driving circuit which is connected to the driving power supply circuit and the control terminal of the switching element and is supplied with voltage from the driving power supply circuit, and which applies a constant current to the control terminal of the switching element to charge the control terminal, thereby turning on the switching element, and at least one diode which is connected between the on-driving circuit and the control terminal of the switching element. The on-driving circuit applies a constant current to the control terminal of the switching element through the diode.

Abstract translation: 一种电子设备，包括具有控制端子并通过控制控制端子的电压驱动的开关元件，提供用于驱动开关元件所需的电压的驱动电源电路，连接到驱动电源的导通电路 供电电路和开关元件的控制端子，并且从驱动电源电路提供电压，并且向开关元件的控制端施加恒定电流以对控制端子充电，从而导通开关元件，并且 连接在驱动电路和开关元件的控制端子之间的至少一个二极管。 驱动电路通过二极管向开关元件的控制端施加恒定电流。

公开(公告)号：US08884660B2

公开(公告)日：2014-11-11

申请号：US14056039

申请日：2013-10-17

Applicant: Denso Corporation

Inventor： Junichi Fukuta ,  Kazunori Watanabe ,  Tsuneo Maebara

IPC: H03K3/01 ,  H03K17/00

CPC classification number: H03K3/01 ,  H03K17/00 ,  H03K17/0828 ,  H03K17/166 ,  H03K17/168

Abstract: In a driver, a charging module electrically charges the on-off control terminal of the switching element for turning on the switching element, and a limiting module performs a task of limiting a voltage at the on-off control terminal of the switching element by a predetermined voltage to thereby limit an increase of a current flowing between the input and output terminals of the switching element. A determining module determines whether the voltage at the on-off control terminal of the switching element deviates from the predetermined voltage while the limiting module is performing the limiting task. A correcting module corrects the voltage at the on-off control terminal of the switching element to be close to the predetermined voltage when it is determined that the voltage at the on-off control terminal of the switching element deviates from the predetermined voltage.

Abstract translation: 在驱动器中，充电模块对开关元件的通断控制端子进行充电以接通开关元件，并且限制模块执行将开关元件的通断控制端子处的电压限制为 从而限制在开关元件的输入端和输出端之间流动的电流的增加。 确定模块确定在限制模块正在执行限制任务时，开关元件的开关控制端子处的电压是否偏离预定电压。 当确定开关元件的开关控制端子处的电压偏离预定电压时，校正模块将开关元件的开 - 关控制端子处的电压校正为接近预定电压。

公开(公告)号：US11799472B2

公开(公告)日：2023-10-24

申请号：US17497307

申请日：2021-10-08

Applicant: DENSO CORPORATION

Inventor： Kazunori Watanabe

IPC: H03K17/16 ,  H02M1/08 ,  H02M7/5387 ,  H02P27/08

CPC classification number: H03K17/166 ,  H02M1/08 ,  H02M7/53871 ,  H02P27/08

Abstract: A drive circuit for a switching element includes: a first power supply; a second power supply; a power supply switching unit that switches the first and second power supplies for applying the drive voltage based on a drive command; and an output switching unit outputting an output voltage switching signal to the second power supply that the output voltage of the second power supply becomes zero in a part of a drive period of the switching element including at least a part of an on-drive period, and the output voltage becomes a predetermined voltage other than zero in a remaining part of the drive period including at least a part of an off-drive period.

公开(公告)号：US10291110B2

公开(公告)日：2019-05-14

申请号：US15490390

申请日：2017-04-18

Applicant: DENSO CORPORATION

Inventor： Kazunori Watanabe ,  Tomotaka Suzuki ,  Tomoyuki Muraho ,  Yoshinori Hayashi

IPC: H03K3/00 ,  H02M1/088 ,  H02M7/5387 ,  H03K17/04 ,  H03K17/0412 ,  H03K17/687 ,  H02M1/00 ,  H02P27/08 ,  H03K17/12

Abstract: In a drive circuit, a rate adjuster adjusts a charging speed of a MOSFET to be faster than the charging speed of an IGBT when a drive state changer changes the first switching element from the off state to the on state first, and changes the second switching element from the off state to the on state next. The rate adjuster also adjusts a discharging speed of the MOSFET to be faster than the discharging speed of the IGBT when the drive state changer changes the MOSFET from the on state to the off state first, and changes the IGBT from the on state to the off state next.

公开(公告)号：US10540234B2

公开(公告)日：2020-01-21

申请号：US16267662

申请日：2019-02-05

Applicant: DENSO CORPORATION

Inventor： Tetsuya Dewa ,  Yosuke Asako ,  Tomotaka Suzuki ,  Kazunori Watanabe ,  Yohei Kondo ,  Junji Miyachi

IPC: H03K3/00 ,  G06F11/14 ,  H03K3/017 ,  H03K7/08 ,  H03K17/94

Abstract: In a drive apparatus, a transmission unit mounted to a first region stops transmission of a pulse signal from a physical-quantity transmission terminal. The transmission unit transmits, from the failure information transmission terminal, a first signal indicative of an occurrence of the failure associated with the target switch when it is determined that the failure associated with the target switch has occurred, and transmits, from the physical-quantity transmission terminal, a second signal indicative of a content of the failure associated with the target switch. A controller mounted to a second region electrically isolated from the first region detects, based on the pulse signal from the physical-quantity transmission terminal, the physical quantity upon no input of the first signal to the controller. The controller identifies, based on the second signal transmitted from the physical-quantity transmission terminal, the content of the failure upon the first signal being input to the controller.

公开(公告)号：US20130322487A1

公开(公告)日：2013-12-05

申请号：US13894880

申请日：2013-05-15

Applicant: DENSO CORPORATION

Inventor： Kazunori Watanabe ,  Tsuneo Maebara ,  Junichi Fukuta

IPC: G01K7/02 ,  G01N25/72

CPC classification number: G01K7/02 ,  G01K1/026 ,  G01K7/01 ,  G01N25/72

Abstract: A temperature detecting device for a power conversion device is provided in which the number of components can be reduced. An exemplary embodiment of the temperature detecting device includes: a plurality of temperature detecting elements that are provided in correspondence with a plurality of temperature detection objects, each temperature detecting element outputting a signal having a correlation with the temperature of the temperature detection object by being supplied power by a common power source; and a temperature detector that detects the temperatures of the temperature detection objects based on the signals having correlation with the temperatures of the temperature detection objects outputted from the temperature detecting elements. The temperature detector detects an average temperature of at least two temperature detection objects among the plurality of temperature detection objects or respective temperatures of the plurality of temperature detection objects based on the output signals.

Abstract translation: 提供了一种用于电力转换装置的温度检测装置，其中可以减少部件的数量。 温度检测装置的一个示例性实施例包括：与多个温度检测对象对应地设置的多个温度检测元件，每个温度检测元件通过供给输出与温度检测对象的温度相关的信号 电源由公共电源供电; 以及温度检测器，其基于与从温度检测元件输出的温度检测对象的温度相关的信号来检测温度检测对象的温度。 温度检测器基于输出信号检测多个温度检测对象中的至少两个温度检测对象的平均温度或多个温度检测对象的相应温度。

公开(公告)号：US09419508B2

公开(公告)日：2016-08-16

申请号：US14536120

申请日：2014-11-07

Applicant: DENSO CORPORATION

Inventor： Kazunori Watanabe ,  Tsuneo Maebara

IPC: H02M3/315 ,  H02M1/08 ,  H02M1/38 ,  H02M7/5387 ,  H03K17/16 ,  H02M1/00 ,  H03K17/042

CPC classification number: H02M1/08 ,  H02M1/38 ,  H02M7/5387 ,  H02M2001/0009 ,  H03K17/04206 ,  H03K17/166 ,  H03K17/168

Abstract: A driving apparatus for driving switching elements of a power conversion circuit. In the apparatus, a first determination unit determines whether or not a dead time that occurs immediately after a setting of discharge rate is changed is greater than the dead time assumed at the time of designing. When the dead time occurring immediately after the setting of discharge rate is changed is greater than the dead time assumed at the time of designing, a shift unit shifts in time at least one of transition to an OFF state of one of the upper-arm and lower-arm switching elements and transition to an ON state of the other of the upper-arm and lower-arm switching elements immediately after the transition to the OFF state so as to reduce a time difference between the transition to the OFF state and the transition to the ON state.

Abstract translation: 一种用于驱动电力转换电路的开关元件的驱动装置。 在该设备中，第一确定单元确定在设置放电速率之后立即发生的死区时间是否大于设计时假定的死区时间。 当在设定放电速率之后立即发生的死区时间大于设计时假定的死区时间时，移位单元在上臂和 下臂开关元件，并且在转变到关闭状态之后立即转变到另一个上臂臂和下臂开关元件的ON状态，以便减小到OFF状态的转变与转换之间的时间差 到ON状态。

公开(公告)号：US09250138B2

公开(公告)日：2016-02-02

申请号：US13894880

申请日：2013-05-15

Applicant: DENSO CORPORATION

Inventor： Kazunori Watanabe ,  Tsuneo Maebara ,  Junichi Fukuta

IPC: G01K7/02 ,  G01N25/72 ,  G01K1/02 ,  G01K7/01

CPC classification number: G01K7/02 ,  G01K1/026 ,  G01K7/01 ,  G01N25/72

Abstract: A temperature detecting device for a power conversion device is provided in which the number of components can be reduced. An exemplary embodiment of the temperature detecting device includes: a plurality of temperature detecting elements that are provided in correspondence with a plurality of temperature detection objects, each temperature detecting element outputting a signal having a correlation with the temperature of the temperature detection object by being supplied power by a common power source; and a temperature detector that detects the temperatures of the temperature detection objects based on the signals having correlation with the temperatures of the temperature detection objects outputted from the temperature detecting elements. The temperature detector detects an average temperature of at least two temperature detection objects among the plurality of temperature detection objects or respective temperatures of the plurality of temperature detection objects based on the output signals.

Abstract translation: 提供了一种用于电力转换装置的温度检测装置，其中可以减少部件的数量。 温度检测装置的一个示例性实施例包括：与多个温度检测对象对应地设置的多个温度检测元件，每个温度检测元件通过供给输出与温度检测对象的温度相关的信号 电源由公共电源供电; 以及温度检测器，其基于与从温度检测元件输出的温度检测对象的温度相关的信号来检测温度检测对象的温度。 温度检测器基于输出信号检测多个温度检测对象中的至少两个温度检测对象的平均温度或多个温度检测对象的相应温度。