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41. 发明专利

JP2529960B2 失效
公开(公告)号：JP2529960B2
公开(公告)日：1996-09-04
申请号：JP5973687
申请日：1987-03-14
申请人： HITACHI LTD
发明人： TAKAHASHI TADASHI , MYASHITA KUNIO , KAWAMATA SHOICHI
IPC分类号： G01D5/245

42. 发明专利

JPH08168292A INDUCTION MOTOR AND MOTOR-DRIVEN VEHICLE USING THE MOTOR 失效
公开(公告)号：JPH08168292A
公开(公告)日：1996-06-25
申请号：JP31203894
申请日：1994-12-15
申请人： HITACHI LTD
发明人： TAJIMA FUMIO , KAWAMATA SHOICHI , MIYAZAKI TAIZO , MASAKI RYOZO , MUTO NOBUYOSHI
IPC分类号： H02K17/12 , B60L9/18 , H02K3/28 , H02P27/06 , H02P7/63
摘要： PURPOSE: To provide a highly reliable induction motor which can avoid the occurrence of such a situation that the motor has to be stopped even when a short-circuiting fault occurs in an inverter provided with a set of drive windings. CONSTITUTION: The area in which only the windings of a set 71 of windings is arranged corresponds to the 120 deg. between θ0 and θ1 and the area in which the windings of a set 72 of windings are arranged corresponds to the 120 deg. between θ2 and θ3 . The area where the sets 71 and 72 coexist in a mixing state corresponds to the 60 deg. between θ1 and θ2 and +60 deg. between θ3 and θ0 and is 1/2 of the area exclusively used for the sets of windings. Parts of the magnetic paths of the sets 71 and 72 are commonly used, but most of the paths are separated from another so that the magnetic paths cannot be affected from another. Therefore, when a short-circuiting fault occurs in the inverter of the set 72 , the adverse influence of the magnetic flux generated by the faulty current flowing through the set 72 on the magnetic flux generated by the sound electric current flowing through the set 71 (mutual inductance) can be suppressed and a rotor can be rotated by using the magnetic flux generated by the sound electric current flowing through the set 71 .

43. 发明专利

JPH061201B2 失效
公开(公告)号：JPH061201B2
公开(公告)日：1994-01-05
申请号：JP28004885
申请日：1985-12-12
申请人： HITACHI LTD
发明人： KAWAMATA SHOICHI , TAKAHASHI TADASHI , MYASHITA KUNIO
IPC分类号： G01D5/245 , G01D5/18

44. 发明专利

JPH0526124B2 失效
公开(公告)号：JPH0526124B2
公开(公告)日：1993-04-15
申请号：JP18926582
申请日：1982-10-29
申请人： HITACHI LTD
发明人： TAKAHASHI TADASHI , MYASHITA KUNIO , KAWAMATA SHOICHI , MORINAGA SHIGEKI
IPC分类号： G01D5/245 , G01D5/14 , G01D5/16 , G01P3/487

45. 发明专利

JPH04267291A THREE-DIMENSIONAL OUTPUT DEVICE 失效
公开(公告)号：JPH04267291A
公开(公告)日：1992-09-22
申请号：JP2824891
申请日：1991-02-22
申请人： HITACHI LTD
发明人： NIHEI HIDEKI , KAWAMATA SHOICHI , HORIE HIDEAKI , MORINAGA SHIGEKI , NAGANUMA RYOICHI , NONAKA SHIRO , TOKUMASU SHINJI
IPC分类号： G06F3/147 , G06F17/50 , G09F9/00
摘要： PURPOSE:To provide an output device that expresses a three-dimensional model generated by a calculator into a three-dimensional form being fully recognizable concretely and visually. CONSTITUTION:Plural pieces of pins 1 provided with a pin head 22 are arranged on a plane of a pin base 2 in a matrix manner. Each of plural units of Z motors 5 with a expansion mechanism 4 for moving the pin 1 up and down and fewer than the number of pieces of the pin 1 is arranged on a plane of a Z motor base 6 as well, and this Z motor base 6 has a Y wheel 3 rolling on a Y slider 23, and the Y slider 23 has an X wheel rolling on an X wheel rolling on the X slider 13 so as to be shiftable in the X direction as one body with an X movable base 12. The X slider 13 is attached onto an XY motor base 8 at an interval by a slider column 45. With this constitution, the Z motor can be set to a position of several hundreds of pin numbers, thus a device is sharply simplifiable.

46. 发明专利

JPH0350965B2 失效
公开(公告)号：JPH0350965B2
公开(公告)日：1991-08-05
申请号：JP19416483
申请日：1983-10-19
申请人： HITACHI LTD
发明人： TAKAHASHI TADASHI , MYASHITA KUNIO , KAWAMATA SHOICHI
IPC分类号： G01B7/00 , G01D5/18 , G01D5/244 , G01D5/245 , G01P3/44

47. 发明专利

JPH0326324B2 失效
公开(公告)号：JPH0326324B2
公开(公告)日：1991-04-10
申请号：JP3729682
申请日：1982-03-11
申请人： HITACHI LTD
发明人： TAKAHASHI TADASHI , MYASHITA KUNIO , KAWAMATA SHOICHI , HAYASHIDA HIROSHI
IPC分类号： G01D5/245 , G01D5/14 , G01D5/16 , G01D5/249 , G01P3/487

48. 发明专利

JPH01275268A MOTOR-DRIVEN POWER STEERING DEVICE 失效
公开(公告)号：JPH01275268A
公开(公告)日：1989-11-02
申请号：JP10257988
申请日：1988-04-27
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： KUME MASAYUKI , KURIYAMA SHIGERU , TAKAHASHI TADASHI , KAWAMATA SHOICHI
IPC分类号： B62D5/04
摘要： PURPOSE:To make steering control with high stability by furnishing a plurality of contactless sensing means for sensing the steering torque around the rotary shaft for steering. CONSTITUTION:In a motor-driven power steering device, the steering torque applied to an upper shaft 1, at whose top a steering wheel is mounted, is transmitted to a lower shaft 2 through a torsion bar 8, and thereby a pinion 3 is rotated to cause a rack shaft 4 to slide. Thus steering is conducted. As an aid steering force, the power of a motor 5 is transmitted to the lower shaft 2 via a pinion 6 and a bevel gear 7. Therein the two shafts 1, 2 in relative rotation with twisting of the torsion bar 8 are equipped, at their ends on mating side, with magnetic drums 9, 10, and magnetic sensors 11a, 11b are arranged in linear symmetry position to these magnetic drums 9, 10 so as to constitute a torque sensor of non-contact type.

49. 发明专利

JPS63205514A DEVICE FOR DETECTING POSITION AND SPEED MAGNETICALLY 失效
公开(公告)号：JPS63205514A
公开(公告)日：1988-08-25
申请号：JP3797687
申请日：1987-02-23
申请人： HITACHI LTD
发明人： KAWAMATA SHOICHI , TAKAHASHI TADASHI , MIYASHITA KUNIO
IPC分类号： G01D5/18 , G01D5/245
摘要： PURPOSE:To obtain a high-accuracy, distortion-free electric signal from a magneto-resistance effect element by arranging the magneto-resistance effect element and removing higher-harmonic components in the direction of magnetic recording magnetized on a magnetic recording medium. CONSTITUTION:The magnetic recording medium 3 where many magnetic poles N and S for generating a magnetic signal are recorded with recording pitch is arranged at the outer periphery of a rotary drum 2 fixed on a rotary shaft 1. A magnetic sensor 4 consisting of magneto-resistance effect elements R1 and R2, on the other hand, is arranged at a certain interval l from the magnetic recording medium 3. Then, the elements R1 and R2 sense the magnetic fields of the magnetic poles to vary in internal resistance. This is led out as an electric signal to detect the position. Here, when the maximum magnetic field to the magnetic signal operates on the elements R1 and R2, the interval l is reduced until the elements R1 and R2 are almost saturated magnetically. Further, the elements R1 and R2 are arranged at an interval lambda/2 while having their lengthwise directions at a specific angle theta to an orthogonal direction. Consequently, optional high-frequency components are canceled to extract only a basic wave component, thereby eliminating waveform distortion.

50. 发明专利

JPS62239031A TORQUE DETECTING DEVICE 失效
公开(公告)号：JPS62239031A
公开(公告)日：1987-10-19
申请号：JP8210086
申请日：1986-04-11
申请人： HITACHI LTD
发明人： KAWAMATA SHOICHI , TAKAHASHI TADASHI , MIYASHITA KUNIO
IPC分类号： H02P6/16 , G01L3/10 , H02P6/17
摘要： PURPOSE:To improve reliability by providing rotary drums having magnetic bodies where magnetic signals are recorded and a magnetoresistance effect element. CONSTITUTION:The rotary drums 2 and 2' having the magnetic bodies 3 and 3' where magnetic signals are recorded are fixed on a shaft 1 at an interval L and the magnetoresistance effect element R is arranged opposite the drums 2 and 2' at small intervals. For example, a motor is fitted on, for example, the driving side of the shaft 1 and a load is fitted on the load side, so that the shaft 1 is twisted by an angle theta=32/piGXL/D XT in proportion to load torque. Here, theta is the angle of the twisting, G is the shearing coefficient (kg/cm ), L is the distance (cm) between the drums 2 and 2', and D is the diameter (cm) of the shaft 1. Further, the coefficient G is determined by the material of the shaft 1 and when the distance L and shaft diameter D are determined, the torque T to the angle theta of the twisting is found. This angle theta is obtained by measuring the zero-cross phase difference theta2-theta1 between outputs EA1 and EA2 obtained by the drum 2 and sensor 4, and drum 2' and sensor 4'. Thus, the torque is detected with high reliability.

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