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1. 发明授权

US12060115B2 Electric drive device and electric power steering device for suppressing pressure fluctuations and water penetration 有权
公开(公告)号：US12060115B2
公开(公告)日：2024-08-13
申请号：US17251405
申请日：2019-06-12
申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.
发明人： Kazuhiko Nakano , Takuro Kanazawa , Hideyuki Hara
IPC分类号： H02K5/10 , B62D5/04 , H02K5/20
CPC分类号： B62D5/0406 , B62D5/0424 , B62D5/0481 , H02K5/10 , H02K5/207 , H02K2205/09
摘要： On the opposite side to an output of a rotation shaft of an electric motor, a ventilation hole communicating between an electronic control unit (ECU) housing space and an electric motor housing space is formed to an end surface wall of a motor housing separating the respective housing spaces. The ventilation hole has a waterproof ventilation part that suppresses water passing but permits the passage of air and water vapor. This structure eliminated the influence of flying rocks and muddy water from the external environment, and suppresses for a long period of time the internal pressure fluctuation of the ECU housing space and the penetration of water into the housing space. Therefore, the internal pressure fluctuation of the housing space for the ECU and the penetration of water into the housing space for the ECU can be suppressed over a long period of time.

2. 发明授权

US10348218B2 Power conversion device and electric power steering device using the same 有权
公开(公告)号：US10348218B2
公开(公告)日：2019-07-09
申请号：US15526359
申请日：2015-09-16
申请人： Hitachi Automotive Systems, Ltd.
发明人： Takuro Kanazawa , Kimihisa Furukawa , Shigehisa Aoyagi
IPC分类号： H02M7/5387 , H02P27/08 , H02M7/5395 , H02M5/458 , B62D5/04 , H02M7/493 , H02M1/00
摘要： An object of the invention is to simultaneously solve a miniaturization and an improvement of productivity of a power conversion device, a temperature rise suppression of a smoothing capacitor, and a reduction of motor noises. The power conversion device of the invention includes a smoothing capacitor, a first power conversion unit and a second power conversion unit which are connected in parallel, and a control unit which generates a PWM pulse on the basis of an output voltage vector and a PWM carrier. The control unit includes a correction unit which corrects a predetermined output voltage vector value to two or more different output voltage vector values such that an average value in one period of the PWM carrier becomes the predetermined output voltage vector value. The correction unit corrects a first output voltage vector value in a first period, and corrects a second output voltage vector value in a second period different from the first period.

3. 发明授权

US09590553B2 Power conversion apparatus and electric power steering device 有权
标题翻译：电力转换装置及电动助力转向装置
公开(公告)号：US09590553B2
公开(公告)日：2017-03-07
申请号：US14792815
申请日：2015-07-07
申请人： Hitachi Automotive Systems, Ltd.
发明人： Takuro Kanazawa , Haruaki Motoda
IPC分类号： H02P27/06 , B62D5/04 , H02K11/00
CPC分类号： H02P27/06 , B62D5/04 , B62D5/0406 , H02K11/33 , H02K2213/06
摘要： Disclosed is a power conversion apparatus that improves the reliability of a redundant system therefor. The power conversion apparatus includes a motor having a cylindrical motor case, a multi-phase stator, and a rotor, a power conversion section that switches the supply of electrical power to the motor, a control circuit board that controls the power conversion section, and a cover made of metal on which the power conversion section and the control circuit board are mounted. The power conversion section includes a first power conversion section and a second power conversion section. The cover includes a protrusion that protrudes toward the motor from a surface substantially parallel to the radial direction of the motor. The protrusion is formed in such a manner as to separate the first and second power conversion sections from each other.
摘要翻译：公开了一种提高冗余系统的可靠性的电力转换装置。电力转换装置包括具有圆筒形电动机壳体，多相定子和转子的电动机，将电力供应电力切换到电动机的电力转换部分，控制电力转换部分的控制电路板，以及电源转换部分和控制电路板安装在其上的金属盖子。电力转换部分包括第一电力转换部分和第二电力转换部分。该盖包括从基本上平行于电动机的径向的表面向电动机突出的突起。突起形成为将第一和第二电力转换部彼此分开。

4. 发明授权

US11715989B2 Electronic control device and electric drive device 有权
公开(公告)号：US11715989B2
公开(公告)日：2023-08-01
申请号：US16968639
申请日：2018-09-07
申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.
发明人： Hideyuki Hara , Takuro Kanazawa , Kazuhiko Nakano , Akira Ishii , Tetsuro Tateyama
IPC分类号： H02K5/22 , H02K11/33 , H01R4/02 , H01R43/02 , H02K3/52 , B62D5/04
CPC分类号： H02K5/225 , H01R4/027 , H01R43/02 , H02K3/522 , H02K11/33 , B62D5/0457 , H02K2211/03
摘要： An element-side connection terminal (40) extending from a power conversion circuit unit (16) includes a first connection terminal portion (40A) that extends in a direction intersecting a direction of extension of a counterpart-side connection terminal (38); and a second connection terminal portion (40B) that is bent at a point before the first connection terminal portion (40A) reaches the counterpart-side connection terminal (38) in a direction to intersect the direction of extension of the counterpart-side connection terminal (38) such that the second connection terminal portion (40B) is provided with elasticity and is in an elastic contact with the counterpart-side connection terminal (38) at an angle. A tip end side (38T) of the counterpart-side connection terminal (38) and a tip end side (40T) of the second connection terminal portion (40B) are electrically joined.

5. 发明授权

US10826355B2 Electric drive device and electric power steering device 有权
公开(公告)号：US10826355B2
公开(公告)日：2020-11-03
申请号：US16329204
申请日：2017-07-31
申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.
发明人： Takuro Kanazawa , Keiji Hamada , Haruaki Motoda
IPC分类号： H02K9/22 , H02K11/00 , H02K5/04 , H02K11/33 , B62D5/04 , H02K5/10
摘要： In an electric drive device, a motor housing includes an end face part opposite to an output part of a rotating shaft of a motor. An electronic control part is arranged at the end face part of the motor housing, and includes a control circuit part, a power supply circuit part, and a power conversion circuit part. The power conversion circuit part is mounted to a power conversion part heat dissipation region of the end face part of the motor housing. The power supply circuit part is mounted to a power supply part heat dissipation region of the end face part of the motor housing. A power conversion circuit part holder is attached to a portion of the end face part around the rotating shaft, and includes a resilient function member structured to press and hold the power conversion circuit part on the power conversion part heat dissipation region.

6. 发明授权

US10797566B2 Electric drive device and electric power steering device 有权
公开(公告)号：US10797566B2
公开(公告)日：2020-10-06
申请号：US16329207
申请日：2017-07-31
申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.
发明人： Takuro Kanazawa , Keiji Hamada , Haruaki Motoda
IPC分类号： H02K5/10 , H02K11/00 , H02K5/22 , H02K9/22 , H02K11/33 , B62D5/04
摘要： Provided is an electric drive device in which heat-dissipating sections (15A) (15B) that transfer at least heat generated by a power supply circuit unit (17) and power conversion circuit units (16) to a motor housing (11) are formed on an end surface section (15) of the motor housing (11) on the opposite side from an output section of a rotating shaft (23) of an electric motor. In addition, a watertight lid member (35) that covers a through hole (41) through which the rotating shaft passes and the end of the rotating shaft (23) from the exterior is attached to the end surface section (15) around the through hole (41), and a waterproof breathable membrane (44) that prevents the passage of moisture while allowing the passage of air and water vapor is provided to part of the watertight lid member.

7. 发明授权

US10136555B2 Power conversion apparatus having a metal plate for heat dissipation 有权
公开(公告)号：US10136555B2
公开(公告)日：2018-11-20
申请号：US14422624
申请日：2014-04-07
申请人： Hitachi Automotive Systems, Ltd.
发明人： Takuro Kanazawa , Kinya Nakatsu , Haruaki Motoda
IPC分类号： H05K7/20 , B62D5/04 , H02K7/116 , H02K9/00 , H02M7/537 , H02K11/33 , H02M7/00
摘要： An inverter (300) is disposed toward an opening in a motor side metal housing (201). A power module (301) is disposed on a metal cover (207) that is in contact with the metal housing (201). The power module (301) includes a semiconductor element, a metal terminal connected to the semiconductor element, and resin that seals the semiconductor element and the metal terminal. A metal plate (306) is disposed on a surface of the power module (301) that is positioned opposite the metal cover (207). Heat generated by the power module (301) is dissipated from the metal cover (207) and from the metal plate (306). This improves the heat dissipation performance. Thus, the size of the power module can be reduced.

8. 发明授权

US10797570B2 Electric drive device and electric power steering apparatus 有权
公开(公告)号：US10797570B2
公开(公告)日：2020-10-06
申请号：US16631316
申请日：2018-03-07
申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.
发明人： Tomishige Yatsugi , Takuro Kanazawa
IPC分类号： B62D5/04 , H02K11/33 , H05K7/20 , H05K5/00 , H01L23/31 , H02K5/22 , H02K9/22 , H02K11/40
摘要： Power conversion circuit unit defined by rotation shaft-side line facing toward rotation shaft of electric motor, control output terminal-side line facing toward coil input terminals of electric motor and side lines connecting both end portions of rotation shaft-side line and control output terminal-side line is packaged with synthetic resin. Three-phase control output terminals connected to the coil input terminals are formed at control output terminal-side line. Power switching elements forming upper and lower arms for each phase are arranged in a zigzag formation along control output terminal-side line with power switching elements being offset from a substantially middle between rotation shaft-side line and control output terminal-side line toward control output terminal-side line. With this, size of power conversion circuit unit can be reduced, and heat of power conversion circuit unit can be efficiently released to the outside.

9. 发明授权

US10425025B2 Power conversion device and motor drive apparatus 有权
公开(公告)号：US10425025B2
公开(公告)日：2019-09-24
申请号：US15580946
申请日：2016-06-27
申请人： Hitachi Automotive Systems, Ltd.
发明人： Takuro Kanazawa , Kimihisa Furukawa
IPC分类号： H02P6/14 , H02P6/28 , G01D5/244 , B62D5/04 , H02P6/16 , H02M7/5387
摘要： Magnetic flux generated when a current flows through a main circuit wiring serves as disturbance of a magnetic sensor, and accurate rotor position information is obtained. A motor drive apparatus controls an operation of a power conversion device outputting a current to an AC motor on the basis of a desired torque command value, and includes a main circuit wiring that is electrically connected to a switching element forming the power conversion device, and through which a DC current or an AC current is transmitted thereto, a magnetic sensor that detects a magnetic flux change of a sensor magnet attached to a rotor of the AC motor, and a controller that calculates a current command value which is output from the power conversion device to the motor on the basis of position information of the rotor detected by the magnetic sensor, in which the controller includes a magnetic flux error correction unit that detects or calculates a magnetic flux component generated by a current flowing through the main circuit wiring.

10. 发明授权

US10204872B2 Power module and power conversion apparatus having a warpage suppression portion 有权
公开(公告)号：US10204872B2
公开(公告)日：2019-02-12
申请号：US15515924
申请日：2015-10-06
申请人： Hitachi Automotive Systems, Ltd.
发明人： Toshiyuki Kobayashi , Takuro Kanazawa
IPC分类号： H01L23/29 , H01L23/00 , H01L25/07 , H01L25/18 , H01L23/04 , H01L23/051 , H01L23/31 , H01L23/367 , H01L25/065
摘要： An object of the present invention is to provide a power module that secures a heat dissipation route and has increased reliability. A power module of the present invention includes a first circuit body having a first semiconductor element and a first conductor portion, a second circuit body having a second semiconductor element and a second conductor portion, a resin sealing material for sealing the first circuit body and the second circuit body, and a warpage suppression portion that is formed along an array direction of the first circuit body and the second circuit body and is formed to have greater rigidity than a sealing portion of the resin sealing material, wherein the warpage suppression portion is formed of the same material as a resin member of the resin sealing material and is formed to be thicker than the sealing portion of the resin sealing material.

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