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公开(公告)号：US20190288678A1
公开(公告)日：2019-09-19
申请号：US16351945
申请日：2019-03-13
Applicant: DENSO CORPORATION
Inventor： Kengo MOCHIKI , Mitsunori KIMURA , Yoshinori HAYASHI
IPC: H03K17/082 , H02M1/08 , H02M7/5387 , H02P27/06
Abstract: In a drive circuit, one of an upper-arm switch and a lower-arm switch being in an on state by a main driver is referred to as a target arm switch. The other of the upper-arm switch and the lower-arm switch being in an off state by the main driver is referred to as an opposite arm switch. An intrinsic diode connected in antiparallel to the opposite arm switch is referred to as an opposite arm diode. The drive circuit includes a protective driver configured to determine whether a failure has occurred in the target arm switch. The protective driver is configured to change the target arm switch from the on state to the off state, and the opposite arm switch from the off state to the on state upon determining that a failure has occurred in the target arm switch.
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公开(公告)号：US20250070678A1
公开(公告)日：2025-02-27
申请号：US18944353
申请日：2024-11-12
Applicant: DENSO CORPORATION
Inventor： Atsuki ASANO , Yoshinori HAYASHI
IPC: H02M3/335
Abstract: An isolated power supply device includes a plurality of transformers having input windings and cores. The input windings are connected to a DC power supply. Output sides of the transformers are connected to power feeding targets. At least two of the transformers have control windings. The isolated power supply device includes a control switch, control wirings, and a common wiring. First terminals of the control windings are connected to the ground. Second terminals of the control windings are connected to first terminals of the corresponding control wirings. Second terminals of the control wirings are connected to the common wiring. The isolated power supply device further includes a control unit that turns on and off the control switch based on a voltage value of the common wiring.
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公开(公告)号：US20170093303A1
公开(公告)日：2017-03-30
申请号：US15274467
申请日：2016-09-23
Applicant: DENSO CORPORATION
Inventor： Yoshinori HAYASHI , Tomotaka SUZUKI
IPC: H02M7/5387 , H02M1/088
CPC classification number: H02M7/53871 , H02M1/088 , H02M3/158 , H02M2001/0032 , H02M2001/0054 , Y02B70/1491 , Y02B70/16
Abstract: In a control device, a load determiner determines whether a power converter is in a high-load state or a low-load state. A high-load controller controls on-off operations of the first rectifiers such that on durations of the first rectifiers are respectively synchronized with each other when it is determined that the power converter is in the high-load state. A low-load controller controls on-off operations of the first rectifiers to reduce the on durations of the first rectifies synchronized with each other when it is determined that the power converter is in the low-load state.
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公开(公告)号：US20180367032A1
公开(公告)日：2018-12-20
申请号：US16061253
申请日：2016-12-08
Applicant: DENSO CORPORATION
Inventor： Yoshinori HAYASHI , Tomotaka SUZUKI
IPC: H02M1/44 , H02M1/088 , H02M7/5387 , H02M7/00
CPC classification number: H02M1/44 , H02M1/088 , H02M7/003 , H02M7/53871 , H02P27/08
Abstract: In a signal transmission circuit including a drive circuit and a control apparatus which are insulated from each other and between which a signal indicative of predetermined information is transmitted via a magnetic coupler, the drive circuit includes a temperature information transmission unit transmitting a first signal indicative of temperature information based on the number of pulses consecutively output with a predetermined period and each having a first waveform with a duty cycle of less than 100% with respect to the period and an abnormality information transmission unit transmitting a second signal indicative of abnormality information based on a pulse having a longer wavelength than the first waveform. The temperature information transmission unit transmits the first signal to the control apparatus and the abnormality information transmission unit transmits the second signal to the control apparatus, via the magnetic coupler common to two information transmission units.
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Patent Agency Ranking
公开(公告)号：US20160218621A1
公开(公告)日：2016-07-28
申请号：US15003878
申请日：2016-01-22
Applicant: DENSO CORPORATION
Inventor： Yoshinori HAYASHI , Tomotaka SUZUKI
CPC classification number: H03K17/168 , G01K7/01 , G01K2205/00 , H02M1/088 , H02M7/48 , H02M7/497 , H02M7/501 , H02M7/5387 , H02M2001/0054 , H03K17/127 , H03K17/164 , H03K2017/0806 , H03K2217/0036 , Y02B70/1491
Abstract: In a controller for applying a first drive voltage signal to one of parallel-connected first and second switching elements to perform a predetermined switching operation of one of the first switching element and the second switching element according to change of a first drive voltage in one of the first and second switching elements, a voltage detector detects the first drive voltage of one of the first and second switching elements. A delaying unit delays an application of a second drive voltage signal to the other of the first switching element and the second switching element to perform the predetermined operation of the other of the first switching element and the second switching element according to change of a second drive voltage in the other thereof while the first drive voltage in one of the first and second switching elements is substantially a predetermined Miller voltage.
Abstract translation: 在用于将并行连接的第一和第二开关元件中的一个并联的第一驱动电压信号施加到第一开关元件和第二开关元件中的一个的预定开关操作的控制器中，根据第一驱动电压的变化， 第一和第二开关元件，电压检测器检测第一和第二开关元件之一的第一驱动电压。 延迟单元将第二驱动电压信号的施加延迟到第一开关元件和第二开关元件中的另一个，以根据第二驱动器的变化执行第一开关元件和第二开关元件中的另一个的预定操作 而第一和第二开关元件中的一个中的第一驱动电压基本上是预定的米勒电压。
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公开(公告)号：US20240213887A1
公开(公告)日：2024-06-27
申请号：US18594127
申请日：2024-03-04
Applicant: DENSO CORPORATION
Inventor： Tetsuya MATSUOKA , Yuta HASHIMOTO , Masataka DEGUCHI , Tatsuya MURAKAMI , Yoshinori HAYASHI
CPC classification number: H02M7/537 , H02M7/003 , H05K7/20927
Abstract: In a power conversion device, first-phase semiconductor modules are successively arranged in a first direction to form a part of a first row. Second-phase semiconductor modules are successively arranged in the first direction to form a part of a second row while facing the first-phase semiconductor modules. Third-phase semiconductor modules are arranged in a second direction so that one of the third-phase semiconductor modules forms a part of the first row and another of the third-phase semiconductor modules forms a part of the second row. The first row and the second row have surfaces facing each other and from which output terminals protrude. Each of output conductors extends from a connected portion of an output terminal in a direction away from the third-phase semiconductor modules.
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公开(公告)号：US20200235653A1
公开(公告)日：2020-07-23
申请号：US16840985
申请日：2020-04-06
Applicant: DENSO CORPORATION
Inventor： Mitsunori KIMURA , Yoshinori HAYASHI , Kengo MOCHIKI
IPC: H02M1/08 , H03K17/687 , H03K17/0814 , H03K17/082 , H03K17/284
Abstract: A drive circuit for a switch drives an upper-arm switch and a lower-arm switch that include body diodes. Of the body diodes in upper- and lower-arm switches, the diode through which a feedback current flows during a dead time is a target diode. Of the upper- and lower-arm switches, the switch that includes the target diode is a target switch. The remaining switch is an opposing arm switch. The drive circuit maintains an electric potential of a control terminal relative to a second terminal of the target switch at a negative voltage over a period from a timing subsequent to a start timing of a dead time immediately after the target switch is switched to an off-state until a point within a period over which the opposing arm switch is set to an on-state, and subsequently maintains the electric potential at an off-voltage until a next dead time is ended.
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公开(公告)号：US20190181856A1
公开(公告)日：2019-06-13
申请号：US16278337
申请日：2019-02-18
Applicant: DENSO CORPORATION
Inventor： Yoshitaka KATO , Kenji KOMIYA , Yusuke SHINDO , Yoshinori HAYASHI , Kenichi WAKABAYASHI
CPC classification number: H03K17/166 , H02M1/08 , H02M1/32 , H02M3/158 , H02M7/537 , H02M7/53875 , H02M2001/0009 , H02M2001/007 , H03K2217/0081
Abstract: A semiconductor device turns on and off a power switching device having a gate terminal and output terminals between which an output current is produced by a gate voltage applied to the gate terminal. The semiconductor device includes: an output current detector detecting a current value correlated with the output current; a voltage detector detecting a voltage across the output terminals of the power switching device; a clamp circuit clamping the gate voltage at a predetermined value; and a controller controlling the clamp circuit to adjust the gate voltage based on the voltage detected by the voltage detector. The controller controls the clamp circuit to set the gate voltage to be at a minimum voltage according to the detected voltage to cause the output current to be larger than a threshold current required for detecting the short circuit in the power switching device.
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公开(公告)号：US20170302152A1
公开(公告)日：2017-10-19
申请号：US15490390
申请日：2017-04-18
Applicant: DENSO CORPORATION
Inventor： Kazunori WATANABE , Tomotaka SUZUKI , Tomoyuki MURAHO , Yoshinori HAYASHI
IPC: H02M1/088 , H03K17/04 , H02M7/5387 , H02P27/08 , H02M1/00
CPC classification number: H02M1/088 , H02M7/53871 , H02M7/53875 , H02M2001/0054 , H02P27/08 , H03K17/0406 , H03K17/04123 , H03K17/127 , H03K17/6871 , Y02B70/1491
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.
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