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公开(公告)号：US20210044238A1
公开(公告)日：2021-02-11
申请号：US16977177
申请日：2018-12-11
Applicant: Hitachi, Ltd.
Inventor： Akeshi TAKAHASHI , Yoshitaka IWAJI , Shinji SUGIMOTO
Abstract: A rotating machine drive system includes: a rotating machine that includes a plurality of windings; a phase current detecting circuit that detects a phase current to be supplied to the rotating machine; an inverter device that includes an inverter circuit that converts DC power from a DC power supply into AC power, and a control device that controls power conversion being performed by an inverter main circuit on the basis of the phase current detected by the phase current detecting circuit, the inverter device operating the rotating machine at a variable speed; and a winding switching device that switches connections of the plurality of windings in accordance with a command from the control device. In a case where the rotation zone of the rotating machine is to be changed, the control device stops the current supply from the inverter circuit to the rotating machine, and switches the rotation zone of the rotating machine from a low-speed rotation zone to a high-speed rotation zone, or from the high-speed rotation zone to the low-speed rotation zone, on condition that a line internal voltage induced by a field magnetic flux of the rotating machine is lower than the DC voltage of the DC power supply.
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公开(公告)号：US20180146577A1
公开(公告)日：2018-05-24
申请号：US15576523
申请日：2015-05-27
Applicant: HITACHI, LTD.
Inventor： Eiichi IDE , Akitoyo KONNO , Shinji SUGIMOTO
CPC classification number: H05K7/20927 , H02K9/19 , H02K11/33 , H02M1/08 , H02M7/003 , H02M7/21 , H02M7/217 , H02M7/5395 , H02P27/08 , H05K7/20272
Abstract: An object of the invention is to provide a power converter that can be reduced in size. To achieve this, a power converter according to the invention includes: water passages arranged radially from an assumed central axis, each being trapezoid-shaped in cross section; and power modules placed between the water passages such that each of the power modules is sandwiched from both surfaces thereof by the water passages. Each of the power modules has an output terminal and positive and negative terminals on an end face located in a centrifugal direction side with respect to the assumed central axis. Any of the power modules and an adjacent one of the power modules are set in a front-back inverted manner.
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Patent Agency Ranking
3.发明申请公开(公告)号：US20160380504A1
公开(公告)日：2016-12-29
申请号：US15137177
申请日：2016-04-25
Applicant: Hitachi, Ltd.
Inventor： Makoto IMURA , Yasuhiro NAKA , Shinji SUGIMOTO , Daisuke KORI
Abstract: A rotating electrical machine includes a housing having an approximately cylindrical shape; a stator and a rotor that are accommodated in the housing; and a cooling frame that is provided on an outer circumferential surface of the housing and circulates a first liquid refrigerant, in which the cooling frame has a partially cylindrical shape. By setting the cooling frame to have the partially cylindrical shape, it is possible to obtain cooling structure capable of obtaining a reduction in size and weight while securing the strength.
Abstract translation: 旋转电机包括具有近似圆柱形形状的壳体; 定子和转子，容纳在壳体中; 以及冷却框架，其设置在所述壳体的外周面上并且使所述冷却框架具有部分圆筒形状的第一液体制冷剂循环。 通过将冷却框架设置为具有部分圆筒形状，可以获得能够在确保强度的同时获得尺寸和重量的减小的冷却结构。
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公开(公告)号：US20220224270A1
公开(公告)日：2022-07-14
申请号：US17598067
申请日：2020-03-23
Applicant: Hitachi, Ltd.
Inventor： Shinji SUGIMOTO , Akeshi TAKAHASHI , Kazuo NISHIHAMA
Abstract: A winding switching device switches parallel and series connections of windings of a rotating electric machine, and includes a plurality of electrodes that are connected to the windings and a power source, a movable portion in contact with the plurality of electrodes and includes a plurality of conductor portions, and an actuator that drives the movable portion. According to a contact state between the plurality of electrodes and the plurality of conductor portions, the windings are connected in parallel at a first position of the movable portion, and are connected in series at a second position of the movable portion. The electrodes include a first electrode connected to a first phase winding of the rotating electric machine in the plurality of windings, and a second electrode connected to a second phase winding. The first electrode and the second electrode are adjacent to each other, and form a neutral point.
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公开(公告)号：US20140028146A1
公开(公告)日：2014-01-30
申请号：US13917523
申请日：2013-06-13
Applicant: Hitachi, Ltd.
Inventor： Shinji SUGIMOTO , Akiyoshi KOMURA , Mamoru KIMURA , Seikichi MASUDA , Masatoshi KOIKE , Mikio ENDO
IPC: H02K1/26
CPC classification number: H02K1/265 , H02K17/20 , H02K2213/03
Abstract: An induction motor includes: a stator and a rotor arranged so as to face the stator via a void, the rotor including conductor bars in a plurality of slots formed by a plurality of teeth arranged so as to extend in the circumferential direction of a rotatably held rotor core, wherein the circumferential width of distal end portions of the slots on the radially outside of the rotor core are narrowed by distal end portion of the teeth on the radially outside of the rotor core, and the teeth are each formed with a projection protruding in an arcuate shape from the distal end of the tooth on the radially outside of the rotor core toward the conductor bar in each of the slots.
Abstract translation: 感应电动机包括：定子和转子，其经由空隙布置成面向定子，所述转子包括由多个齿形成的多个槽中的导体条，所述多个槽被布置成沿可旋转地保持的圆周方向延伸 转子芯，其中转子芯的径向外侧上的槽的前端部的周向宽度由转子芯的径向外侧上的齿的前端部变窄，并且齿分别形成有突出部 在转子芯的径向外侧上的齿的远端处的弓形形状朝向每个槽中的导体杆。
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公开(公告)号：US20220006411A1
公开(公告)日：2022-01-06
申请号：US17280422
申请日：2019-06-21
Applicant: HITACHI, LTD.
Inventor： Akeshi TAKAHASHI , Shinji SUGIMOTO , Kazuo NISHIHAMA
Abstract: A rotary machine driving system includes: a rotary machine including a plurality of coils; an inverter device configured to operate the rotary machine at a variable speed, including a control device for controlling power conversion by an inverter circuit, and a coil switching device for switching a connection of the coils according to the control device. The control device commands the coil switching device to switch the connection of the coils when rotation of the rotary machine transitions between a low-speed rotation range and a high-speed rotation range due to acceleration and deceleration. A starting end and a terminal end of at least one set of coils per phase of the rotary machine are drawn out in a freely connectable state. The coil switching device includes at least one movable portion driven by one actuator.
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公开(公告)号：US20150207388A1
公开(公告)日：2015-07-23
申请号：US14598794
申请日：2015-01-16
Applicant: Hitachi, Ltd.
Inventor： Shinji SUGIMOTO , Daisuke KORI , Yuji KANAZAWA , Hirotaka KINOSHITA
IPC: H02K9/197
Abstract: A rotating electric machine includes a cooling frame. The cooling frame includes a flow passage through which the first liquid coolant circulates, a flow inlet connected to one end of the flow passage so as to make the first liquid coolant flow from the outside into the flow passage, and a flow outlet connected to the other end of the flow passage so as to make the first liquid coolant having flown through the flow passage flow to the outside. The machine is configured that, when the flow passage is divided into a front half portion closer to the flow inlet and a latter half portion closer to the flow outlet, the front half portion becomes a portion where the first liquid coolant mainly cools the second liquid coolant, and the latter half portion becomes a portion where the first liquid coolant mainly cools the gas coolant.
Abstract translation: 旋转电机包括冷却框架。 冷却框架包括第一液体冷却剂循环通过的流动通道，连接到流动通道的一端的流入口，以使第一液体冷却剂从外部流入流动通道;以及流出口， 流动通道的另一端，以使流过流道的第一液体冷却剂流向外部。 该机器被构造成当流动通道被分成更靠近流动入口的前半部分和靠近流出口的后半部分时，前半部分变成第一液体冷却剂主要冷却第二液体的部分 冷却剂，后半部分成为第一液体冷却剂主要冷却气体冷却剂的部分。
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