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91. 发明专利

JPH10295061A METHOD FOR MAGNETIZATION OF PERMANENT-MAGNET ROTOR 失效
公开(公告)号：JPH10295061A
公开(公告)日：1998-11-04
申请号：JP10004197
申请日：1997-04-17
申请人： HITACHI LTD
发明人： TAJIMA FUMIO , MATSUNOBU YUTAKA , KAWAMATA SHOICHI , SHIBUKAWA SUETARO , KOIZUMI OSAMU
IPC分类号： H02K15/03
摘要： PROBLEM TO BE SOLVED: To magnetize a rotor without being taken out from the inside of a stator by a method, wherein a part in a magnet blank corresponding to a salient pole to which a two-phase windings have been executed is magnetized, the rotor is turned by a prescribed angle so as to be fixed, one phase of the two-phase windings is combined with the other phase and an unmagnetized part in the magnet blank is magnetized. SOLUTION: A rotor 3 is positioned and fixed in such a way that N-poles and S-poles in a magnet blank 4 for the rotor 3 match between V-phase and U-phase salient pole parts 13 at a stator 1. Then, a magnetization current is supplied to the U-phase from the V-phase of a winding 2 by a magnetization power supply, and parts corresponding to the width in the circumferential direction of the salient pole parts 13 out of the magnet blank 4, which faces the V-phase and U-phase salient pole parts 13 via respective gaps are magnetized. Then, the rotor 3 is turned by 15 deg. in a clockwise direction, in such a way that N-poles and S-poles of the magnet blank 4 for the rotor 3 matches between the W-phase and V-phase salient pole parts 13, and the rotor 3 is positioned in the position so as to be fixed. Then, a current is supplied to the W- phase from the V-phase of the winding 2 by the magnetization power supply, and remaining parts of the magnet blank 3 for the rotor are magnetized.

92. 发明专利

JPH10262359A PERMANENT MAGNET DYNAMO-ELECTRIC MACHINE 失效
公开(公告)号：JPH10262359A
公开(公告)日：1998-09-29
申请号：JP6270897
申请日：1997-03-17
申请人： HITACHI LTD
发明人： TAJIMA FUMIO , MATSUNOBU YUTAKA , KAWAMATA SHOICHI , SHIBUKAWA SUETARO , KOIZUMI OSAMU
IPC分类号： H02K29/00 , H02K21/16 , H02P6/06 , H02P6/08 , H02P6/15 , H02P6/17 , H02P6/18 , H02P6/182 , H02P6/28
摘要： PROBLEM TO BE SOLVED: To reduce the peak value of the induced voltage during a failure by setting the peak value of the generated induced voltage between terminals of a permanent magnet dynamo-electric machine to be the induced voltage value smaller than the peak value of the fundamental wave voltage. SOLUTION: A permanent magnet dynamo-electric machine device is provided with a DC power source 30, an inverter 31 to be connected thereto, and a permanent magnet dynamo-electric machine to be directly connected to the output end of the inverter 31, and of the system to control the magnetic field system by weakening the magnetic field of the permanent magnet dynamo-electric machine by a phase shift circuit 37. The shape of the induced voltage satisfies the inequality of Vp

93. 发明专利

JPH10234144A CONCENTRATED WINDING ELECTRIC ROTATING MACHINE 失效
公开(公告)号：JPH10234144A
公开(公告)日：1998-09-02
申请号：JP3463697
申请日：1997-02-19
申请人： HITACHI LTD
发明人： KAWAMATA SHOICHI , TAJIMA FUMIO , MATSUNOBU YUTAKA , SHIBUKAWA SUETARO
IPC分类号： H02K1/14 , H02K1/10 , H02K3/18 , H02K21/16 , H02K29/00
摘要： PROBLEM TO BE SOLVED: To obtain a small, lightweight, rigid and high-efficiency concentrated winding electric rotating machine by splitting the stator core as auxiliary salient poles in the circumferential direction and securing the auxiliary salient poles by a supporting member, thereby binding respective stator core sections. SOLUTION: A split core 41 comprises auxiliary salient poles 411, 412, and three stator winding salient poles to be wound with a stator winding arranged at a constant interval between them. Similarly, a split core 42 comprises auxiliary salient poles 421, 422, and three stator winding salient poles which are arranged at a constant interval between them, and a split core 43 comprises auxiliary salient poles 431, 432, and three stator winding salient poles arranged at a constant interval between them. The salient poles 411, 412, 421, 422, 431, and 432 are provided with supporting members 10, 101, 102 and 100 for coupling split stators 41, 42 and 43 and enhancing the coupling strength, such that a stator 4 is clamped in the axial direction.

94. 发明专利

JPH104658A INDUCTION MOTOR 失效
公开(公告)号：JPH104658A
公开(公告)日：1998-01-06
申请号：JP15254796
申请日：1996-06-13
申请人： HITACHI LTD
发明人： TAJIMA FUMIO , KAWAMATA SHOICHI , OHARAGI HARUO , SHIBUKAWA SUETARO
IPC分类号： H02K17/16
摘要： PROBLEM TO BE SOLVED: To provide an induction motor, having excellent efficiency and being improved in manufacturing precision. SOLUTION: An induction motor 10 is constituted of a stator 20, having a stator core 20, whereon a stator winding 24 is wound and a rotor 30. The rotor 30 is constituted of a rotor core 32 which is supported rotatably in the inner periphery of the stator 20, end rings 36A and 36B formed at the opposite ends of the rotor core 32 by die casting, a solid bar 34 which is inserted in a slot, formed on the outer peripheral side of the rotor core 32 and is connected electrically to the end rings 36A and 36B, formed at the opposite ends and a die-cast bar 36C which is formed in a plurality of second slots, formed on the inner peripheral side of the rotor core 32 to be formed integrally with the end rings.

95. 发明专利

JPH09327140A ELECTRIC ROTATING MACHINE OF PERMANENT MAGNET ROTATION TYPE AND ITS MANUFACTURE 失效
公开(公告)号：JPH09327140A
公开(公告)日：1997-12-16
申请号：JP14546296
申请日：1996-06-07
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： SHIBUKAWA SUETARO , ODA KEIJI , HIRANO YOSHINAGA , KADOWAKI YOSHIKAZU , TAJIMA FUMIO
IPC分类号： H02K1/27 , H02K15/03
摘要： PROBLEM TO BE SOLVED: To obtain an electric rotating machine which reduces a cogging torque and which reduces a noise by a method wherein a magnet insertion hole is divided into a plurality of holes in the axial direction, the holes are formed so as to be shifted by a prescribed angle in the circumferential direction and permanent magnets are fixed inside the magnet insertion holes via a gap filler. SOLUTION: The size of every magnet insertion hole 6 is a little larger than the size of every permanent magnet, a gap filler which is used also as an adhesive is filled into the very small gap between every permanent magnet and every magnet insertion hole 6, and every permanent magnet 4A is buried in every magnet insertion hole 6 so as to be integrated with a laminated rotor core 3. Every permanent magnet 4A and every permanent magnet 4B which are divided into two in the radial direction are fixed to the laminated rotor core 3 so as to be in a positional relationship in which they are shifted by a prescribed angle δ along the circumferential direction of the laminated rotor core 3. When the permanent magnets are shifted by an arbitrary angle in the circumferential direction in this manner, they can have a skew effect. Consequently, the cogging torque of an electric rotating machine can be reduced, and its noise can be reduced.

96. 发明专利

JPH09135546A ABDUCTION-TYPE ROTARY MACHINE 失效
公开(公告)号：JPH09135546A
公开(公告)日：1997-05-20
申请号：JP28836195
申请日：1995-11-07
申请人： HITACHI LTD
发明人： TAJIMA FUMIO , KAWAMATA SHOICHI , OHARAGI HARUO , SHIBUKAWA SUETARO , MASUDA SEIKICHI
IPC分类号： H02K1/06 , H02K17/12 , H02K19/10 , H02K29/00
摘要： PROBLEM TO BE SOLVED: To reduce the size and weight of a rotary machine by allowing a power supply frequency at the maximum number of rotations out of the numbers of rotations which give the maximum torque when a car is running at a low speed, the maximum phase voltage of the rotary machine at a high speed, the number of turns of a single-phase stator winding, and the length and width of a multilayer rotor iron core to satisfy a specified relation. SOLUTION: A stator 2 consists of a stator iron core 4 with a stator winding 5 and a stator supporting plate 6 which supports the stator iron core 4. A rotor 3 consists of a solid-state rotor iron core 7 and a multilayer rotor iron core formed on the inner surface of the iron core 7. When a power supply frequency at the maximum number of rotations out of the numbers of rotations which give the maximum torque when a car is running at a low speed is Fm(Hz), the maximum phase voltage of a rotary machine when the car is running at a high speed is Vb(V), the number of turns of a single-phase stator winding 5 is W, the length and width of the multilayer rotor iron core 7 are We(cm) and Hc(cm) respectively, Fm, Vb, W, We, and Hc should satisfy a specified relation shown by the formula. By this method, the size and weight of an abduction-type rotary machine 1 can be reduced.

97. 发明专利

JPH08322170A ELECTRIC ROTATING MACHINE 失效
公开(公告)号：JPH08322170A
公开(公告)日：1996-12-03
申请号：JP12470695
申请日：1995-05-24
申请人： HITACHI LTD
发明人： KAWAMATA SHOICHI , TAJIMA FUMIO , KUDO MITSUO , SHIBUKAWA SUETARO , KOYAMA TORU , SUGAWARA TOSHIO
IPC分类号： H02K1/18 , H02K1/20 , H02K9/19 , H02K9/22
摘要： PURPOSE: To achieve sufficient cooling by providing a plurality of ribs and grooves in the inner circumference of a yoke and filling the inner circumference thereof with a molding material. CONSTITUTION: A first yoke 3 is provided with ribs 26, 28 and grooves up to the inner circumferential end faces 29, 30 thereof being bonded to a stator core 46. A stator winding 6 and the stator core 46 are filled with a molding material 15 surrounding the inner circumferential surface of the first yoke 3 and the coil end part of stator winding 6. The molding material 15 is made of insulating material having high thermal conductivity. Consequently, the heat generated from the stator winding 6 is transmitted on the molding material 15 to the first yoke 3 and second split yokes 4, 5 thence discharged to the atmosphere. Temperature rise of an electric rotating machine 1 is suppressed furthermore through combination with a cooling channel 7.

98. 发明专利

JPH0787681A CHARGING CONTROL DEVICE OF VEHICLE-MOUNTED GENERATOR 失效
公开(公告)号：JPH0787681A
公开(公告)日：1995-03-31
申请号：JP23317993
申请日：1993-09-20
申请人： HITACHI LTD , NISSAN MOTOR
发明人： KURIYAMA SHIGERU , SHIBUKAWA SUETARO , OGURA SUKEYUKI
IPC分类号： H02J7/10 , H02J7/14 , H02J7/16 , H02J7/24
摘要： PURPOSE:To rapidly charge a vehicle-mounted battery and at the same time extend its life. CONSTITUTION:At the initial stage of charging, constant current charging is performed with a predetermined maximum charging current value Ic and constant voltage charging is performed with the voltage allowanc value of electrical load as a target voltage value at the middle stage of charging, thus increasing the charging current at the middle stage of charging and achiving a rapid charging. Also, since the charging current value at the initial stage of charging was limited, the damage of battery activated substance can be avoided due to the flow of an excessive current, thus extending the battery life. Further, by reducing the charging voltage to the battery terminal voltage with 100% charging at the end of charging, an excessive charging can be avoided.

99. 发明专利

JPH06113512A AC POLYPHASE ELECTRIC ROTATING MACHINE 失效
公开(公告)号：JPH06113512A
公开(公告)日：1994-04-22
申请号：JP26108192
申请日：1992-09-30
申请人： HITACHI LTD
发明人： TAJIMA FUMIO , KANAZAWA HIROYUKI , TAWARA KAZUO , ITO MOTOYA , SHIBUKAWA SUETARO
IPC分类号： H02K1/16 , H02K17/12
摘要： PURPOSE:To enhance productivity while making uniform the magnetic flux density by fixing the position of core tooth part corresponding to the position where the current phases of stator winding are different from each other and providing a protrusion or recess on the core side inner face or varying the peripheral width of the gap side inner peripheral face of the core. CONSTITUTION:In a three-phase induction motor of two pole structure having twenty four winding grooves, number of winding grooves per pole per phase is four and stator windings 5 for phase U, phase V and phase W are arranged respectively. In this regard, each winding forms one coil between U+ and U- and four coils of U+ are connected in series to form one phase. In such constitution, magnetic flux density is made uniform by varying the inner diameter of the stator winding 5 depending on the position in the peripheral direction. In other words, gap length is lengthened for a core tooth part 4b corresponding to a position where the current phases of stator windings contained in adjacent winding grooves 4c are difference, e.g. U+U+ and U+V-, thus increasing the inner diamecral dimension.

100. 发明专利

JPH02159949A STATOR OF GENERATOR FOR CHARGING VEHICLE 失效
公开(公告)号：JPH02159949A
公开(公告)日：1990-06-20
申请号：JP31389988
申请日：1988-12-14
申请人： HITACHI LTD
发明人： SHIBUKAWA SUETARO
IPC分类号： H02K19/22
摘要： PURPOSE:To prevent degradation of insulation by employing an annular generating coil and surrounding the generating coil with annular poles. CONSTITUTION:Generating coils 41-43 are wound annularly and surrounded by annular poles 31-32 comprising magnetic bodies arranged such that three poles have phases of 0(rad), 2pi/3(rad) and 4pi/3(rad) respectively. Since the generating coils 41-43 can be protected against external force, they are not damaged by bad handling and power generation is not disabled by degradation of insulation.

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