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公开(公告)号：US20200007008A1
公开(公告)日：2020-01-02
申请号：US16283014
申请日：2019-02-22
Applicant: Hitachi, Ltd.
Inventor： Isao HAGIYA , Misato SATO , Takayuki KOYAMA , Kenichi SUGIMOTO
Abstract: A motor with an inner fan includes a rotor rotating with a shaft, a stator opposing the outer peripheral surface of the rotor, an end ring connected to the rotor, stator wiring connected to the stator, a fan rotating with the shaft through a sleeve, a fan guide opposing the tip end of the blade outer periphery of the fan, and a frame storing the rotor, the stator, the fan, the fan guide, the end ring, and the stator wiring. The rotor includes an axial duct penetrating the rotor in the axial direction of the rotor and a radial duct communicating with the axial duct and penetrating the rotor radially from the inside to the outside of the rotor. The fan is an inner fan arranged inside the frame, the inner fan is of a diagonal flow type, and the discharge direction of the inner fan is the inward direction.
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公开(公告)号：US20180083555A1
公开(公告)日：2018-03-22
申请号：US15661253
申请日：2017-07-27
Applicant: Hitachi, Ltd.
Inventor： Daisuke KORI , Takayuki KOYAMA , Motonobu IIDUKA
IPC: H02P1/50
Abstract: A field winding type synchronous motor includes an exciter 4 and, after starting by forming a short circuit of a field winding 10, excites the field winding by using the exciter, and includes a starting control circuit 30 that outputs a control signal controlling On/Off of a first opening/closing device, in which the exciter and the field winding are connected through the first opening/closing device 1. The starting control circuit includes: a signal transmitting circuit that outputs the control signal at timing, which is detected based on an induced electromotive voltage generated in the field winding, at which switching to a synchronous operation is performed; and a time limit setting circuit that, after a predetermined time elapses after the starting control circuit is started, directs the signal transmitting circuit to output the control signal.
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公开(公告)号：US20190140530A1
公开(公告)日：2019-05-09
申请号：US16096552
申请日：2017-07-31
Applicant: Hitachi, Ltd.
Inventor： Kazuo NISHIHAMA , Masanori SAWAHATA , Takayuki KOYAMA , Makoto IMURA , Yuuichirou YOSHITAKE , Kenichi SUGIMOTO , Kengo UEDA
Abstract: There is provided a rotary electric machine that ensures improving a maximum torque and a rated power factor while reducing an increase in a starting current. In view of this, the rotary electric machine includes a shaft, a rotor, and a stator. The rotor is fixed to an outer periphery of the shaft. The stator is located so as to surround an outer periphery of the rotor. The rotor includes a rotor iron core including a plurality of rotor slots located at predetermined intervals in a circumferential direction and rotor bars inserted into the rotor slots. Rotor slits communicate with outer peripheral sides of the rotor slots. The rotor slits have a width ws in a circumferential direction. The width ws is smaller than a height hs in a radial direction of the rotor slit, and when a rated current is denoted as I1, a turn ratio (primary/secondary) is denoted as Tr, and a magnetic permeability in a vacuum is denoted as μ0, a relationship of ws>μ0×I1×Tr/0.6 is met.
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公开(公告)号：US20140333174A1
公开(公告)日：2014-11-13
申请号：US14269820
申请日：2014-05-05
Applicant: Hitachi, Ltd.
Inventor： Makoto IMURA , Tomohiro NARUSE , Motonobu IIDUKA , Shigeki NAKAE , Takeshi MORI , Takayuki KOYAMA
CPC classification number: H02K1/24
Abstract: An electrical rotating machine is provided with a salient-pole rotor, which is composed of magnetic field pole bodies integrally formed with a shaft and pole shoes constituting magnetic field pole heads. Each pole shoe is fixedly joined on the corresponding one of the magnetic field pole bodies with a plurality of bolts. Each pole shoe or its corresponding magnetic field pole body is provided with at least one protrusion or recess for restricting a conically-shaped compression domain in a compression domain that occurs in the pole shoe when the pole shoe is joined on the corresponding magnetic field pole body with the bolts.
Abstract translation: 旋转电机设有凸极转子，凸极转子由与轴构成的磁场极和构成磁场极头的极靴组成。 每个极靴通过多个螺栓固定在相应的一个磁场极体上。 每个极靴或其对应的磁场极体设置有至少一个突起或凹槽，用于在极靴接合在相应的磁场极体上时限制发生在极靴中的压缩域中的锥形压缩域 用螺栓
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公开(公告)号：US20190199162A1
公开(公告)日：2019-06-27
申请号：US16180615
申请日：2018-11-05
Applicant: Hitachi, Ltd.
Inventor： Misato SATO , Takeshi MORI , Kenichi SUGIMOTO , Takayuki KOYAMA
CPC classification number: H02K5/24 , H02K5/20 , H02K9/06 , H02K9/18 , H02K2205/09
Abstract: A rotary electric machine of the present invention includes: a stator; a rotor placed on an inner diameter side of the stator through an air gap and fixed to a rotating shaft; a stator frame supporting the stator; a casing storing the stator and the rotor; an outer fan fixed to the rotating shaft; a heat exchanger installed above the casing for heat exchange between outside air taken through the outer fan and internal air to remove heat; and an outer fan duct installed on an end portion of the casing in an axial direction, provided with the outer fan in an inside of the outer fan duct, and formed with a ventilation path through which the outside air is delivered to the heat exchanger. A plate-shaped member has at least a curved surface portion. The plate-shaped member forms the ventilation path of the outer fan duct.
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Patent Agency Ranking
公开(公告)号：US20170250636A1
公开(公告)日：2017-08-31
申请号：US15432336
申请日：2017-02-14
Applicant: Hitachi, Ltd.
Inventor： Daisuke KORI , Motonobu IIZUKA , Takayuki KOYAMA
Abstract: A field winding type synchronous machine connects to a DC line and includes a rotor; a stator; an exciter that passes a current through a field winding of the rotor; and a rectification circuit that rectifies an output from the exciter and provides the output to the DC line. The synchronous machine includes the field winding being connected in parallel to a first circuit in which a parallel circuit including a rectifier element and a first switchgear is connected in series to a discharge resistor, a second switchgear being connected in series to the DC line that connects the first circuit to the rectification circuit, and a capacitor being provided between the discharge resistor and the input side of an electric power source element for gating the first switchgear.
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公开(公告)号：US20170187264A1
公开(公告)日：2017-06-29
申请号：US15381766
申请日：2016-12-16
Applicant: Hitachi, Ltd.
Inventor： Daisuke KORI , Ryuichiro IWANO , Masanori SAWAHATA , Kazuo NISHIHAMA , Motonobu IIZUKA , Takayuki KOYAMA , Kenichi SUGIMOTO
Abstract: The invention provides a rotating electrical machine system in which an air volume of a refrigerant is increased near the center of a rotating electrical machine in the axial direction is improved. The rotating electrical machine includes a rotor and a stator, in which the stator core, laminated electromagnetic steel sheets formed by laminating a plurality of electromagnetic steel sheets in the axial direction are divided into a plurality of sets of packet cores, and between one of the packet cores of the plurality of sets and another packet core adjacent to it, there is formed a duct providing a flow channel of the stator, and in a duct situated at the center side from both ends in the axial direction among the duct, there is a portion of two packet cores facing each other across the duct, a diameter direction length of the two packet cores becoming long.
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公开(公告)号：US20170163116A1
公开(公告)日：2017-06-08
申请号：US15432461
申请日：2017-02-14
Applicant: Hitachi, Ltd.
Inventor： Makoto IMURA , Takayuki KOYAMA , Shigeki NAKAE , Motonobu IIZUKA , Masanori MATSUMOTO , Hideyuki OOTAKA
Abstract: A coil support structure including a coil spacer, a yoke spacer, and a support formed between the coil spacer and the yoke spacer. And the support has laterally protruding parts.
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公开(公告)号：US20170126098A1
公开(公告)日：2017-05-04
申请号：US15337212
申请日：2016-10-28
Applicant: Hitachi, Ltd.
Inventor： Youko FURUKAWA , Ryuuichirou IWANO , Daisuke KORI , Motonobu IIZUKA , Takayuki KOYAMA , Kazuhiro OGAWA , Shigeki NAKAE
Abstract: The present invention provides a rotating electric machine comprising: a stator; a rotor disposed in such a manner that the outer peripheral surface of the rotor faces the inner peripheral surface of the stator; and a plurality of coil supports that support between poles of a coil forming the rotor, wherein the coil supports are detachably configured with respect to the rotor, at least one of the coil supports is provided with a fin formed of a member different from that of the coil support, and the fin is provided in such a manner that a windway through which a swirl flow occurring with the rotation of the rotor passes is formed between the coil and the fin.
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公开(公告)号：US20150035471A1
公开(公告)日：2015-02-05
申请号：US14447105
申请日：2014-07-30
Applicant: Hitachi, Ltd.
Inventor： Daisuke KORI , Motonobu IIZUKA , Takayuki KOYAMA
IPC: H02P6/00
CPC classification number: H02P1/50 , H02P6/28 , H02P25/03 , H02P2207/05
Abstract: A field winding type synchronous motor comprises a stator, a rotor with field windings, a brushless exciter, and a rectification circuit rectifying an output of the brushless exciter. A first circuit in parallel with the field windings includes a discharge resistor and a first switching device with a backward diode. The discharge resistor and the first switching device are connected in series. A second switching device is provided in one of the DC lines connecting the first circuit and the rectification circuit. The first switching device is controlled by a potential obtained by resistor dividing of an induced voltage in the field windings and a connection from the potential via a diode to anode adjacent to the rectification circuit on the one of the DC lines with the second switching device thereon. The second switching device is closed in a synchronous speed.
Abstract translation: 励磁绕组式同步电动机包括定子，具有励磁绕组的转子，无刷励磁器和整流无刷励磁机的输出的整流电路。 与场绕组并联的第一电路包括放电电阻器和具有后向二极管的第一开关器件。 放电电阻和第一开关器件串联连接。 第二开关装置设置在连接第一电路和整流电路的DC线之一中。 第一开关装置由通过电场分压在场绕组中产生的感应电压而获得的电位进行控制，并且通过其上的第二开关装置在DC线上与该整流电路相邻的二极管与正极之间的电位连接 。 第二开关装置以同步速度关闭。
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