专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

31. 发明专利

JPS63144777A CONTROLLER FOR HYSTERESIS MOTOR 失效
公开(公告)号：JPS63144777A
公开(公告)日：1988-06-16
申请号：JP29042986
申请日：1986-12-08
申请人： HITACHI LTD
发明人： ARAI KEIJI , TAKAHASHI NORIYOSHI , SUZUKI KATSUNORI , BABA TOSHIO
IPC分类号： H02P1/46
摘要： PURPOSE:To suppress the disturbance of power at the time of pull-in, by setting motor-applying voltage on asynchronous operation immediately before a hystere sis motor comes to synchronous speed operation, to be lower than specified rated voltage. CONSTITUTION:Based on the signal of a frequency command circuit 7, the output of frequency command signal is generated from a pulse oscillator 8. From a voltage command circuit 11, the output of voltage command signal is generated based on the signal of the frequency command circuit 7. In the meantime, the induced voltage of a hysteresis motor 6 is detected via an insulat ing transformer 17, and is converted to motor rotational-frequency signal by a pulse generation circuit 14 and a voltage converter 15. From a limit control circuit 16, the output of signal is generated when the amount of the output signal of the voltage converter 15 is equal to or more than a specified amount. As a result, the output signal of the voltage command circuit 11 is set to be of the amount of the output signal of the frequency command circuit 7 with the output signal of the limit control circuit 16 subtracted there from.

32. 发明专利

JPS6328241A MAGNETIC WEDGE FOR ROTARY ELECTRIC MACHINE 失效
公开(公告)号：JPS6328241A
公开(公告)日：1988-02-05
申请号：JP16975286
申请日：1986-07-21
申请人： HITACHI LTD
发明人： ARAI KEIJI , WATABE MASATOSHI , TAKAHASHI MIYOSHI , SATO YUKINORI , ITO MOTOYA
IPC分类号： H02K3/493
摘要： PURPOSE: To obtain a magnetic wedge being excellent in mechanical strength and having magnetic anisotropy, by a method wherein a plurality of magnetic thin plates of rectangular form are laminated thereby an L-like member is constituted, and two L-like members are arranged back to back and integrated. CONSTITUTION: A winding 9 with an insulator 8 wound thereon is installed to a slot 7 formed on a stator core 6, and a magnetic wedge 11 is forced in utilizing a groove 10 formed in a core tooth 3 of opening portion of the slot 7 thereby the winding 9 is fixed and supported. The magnetic wedge 11 is constituted in that non-magnetic material such as aluminium material or copper material is evaporated or pressed on one surface or both surfaces of a magnetic iron plate and a rectangular magnetic plate thus formed is bent along the longitudinal direction thereby a magnetic thin plate 16 is formed, and a plurality of magnetic thin plates 16 are laminated thereby an L-like member 17 is constituted, and two L-like members 17 are arranged back to back and integrated together with the magnetic thin plates 16 by means of bonding or pressing.

33. 发明专利

JPS62262698A OPERATION POWER UNIT FOR FLYWHEEL-DRIVING INVERTER 失效
公开(公告)号：JPS62262698A
公开(公告)日：1987-11-14
申请号：JP10554786
申请日：1986-05-08
申请人： HITACHI LTD
发明人： ARAI KEIJI , TAKAHASHI NORIYOSHI , KAWAGUCHI TOSHIO
IPC分类号： F16F15/30 , H02K5/167 , H02K7/02 , H02K7/08 , H02P27/06
摘要： PURPOSE:To improve bearing characteristics by generating an axial minute vibration in a flywheel rotator to thicken a lubricating oil film through making an inverter supply output voltage undergo a sudden change momentarily. CONSTITUTION:A pulse signal from a pulse generator circuit 47 is added by an adder 45 to a desired voltage signal from a voltage generator circuit 44. A power rectifier 18 is operated on the basis of this adder output signal. Accordingly, a voltage periodically undergoing a sudden change for a short time is applied to a flywheel-driving motor to rotate and operate said motor. As a result, the magnetic attraction working on the motor stator and rotor changes periodically. In this way, an axial minute vibration is generated in the rotator. This minute vibration changes a pressure working on a slide bearing lubricating face and a lubricating oil film also thickens consequently.

34. 发明专利

JPS60125414A MAGNETIC BEARING DEVICE 失效
公开(公告)号：JPS60125414A
公开(公告)日：1985-07-04
申请号：JP23140283
申请日：1983-12-09
申请人： HITACHI LTD
发明人： ABUKAWA TOSHIMI , ARAI KEIJI , ITOU MOTOYA
IPC分类号： F16C32/04 , F16C39/06 , F16F15/03
摘要： PURPOSE:To increase a vibration-damping force, by a method wherein a space, in which magnetic fluid is sealed, is formed in a part of the magnetic flux passage part of a non-magnetic conductive body mounted to a magnet on the stationary side. CONSTITUTION:A space 7, sized to be wider than a width W of a permanent magnet 5, is formed in a part of the magnetic flux of a non-magnetic conductive body 6 mounted to a magnet 5 on the stationary side positioned opposite to a magnet 2 on the rotary side, and a magnetic fluid is sealed in the space 7. When a rotary shaft 1 is vibrated, the magnet 2 on the rotary side is vibrated togetherwith. Accompanying with movement of the magnet 2 on the rotation side, the magnetic fluid 8 in the space 7 is moved to one side, and a wide change in magnetic flux density in the non-magnetic conductive body 6 is produced. This causes a large eddy current to flow through the non-magnetic conductive body 6, and provides a magnetic bearing device having a high vibration-damping force.

35. 发明专利

JPS6020605B2 失效
公开(公告)号：JPS6020605B2
公开(公告)日：1985-05-23
申请号：JP17322380
申请日：1980-12-10
申请人： HITACHI LTD
发明人： ABUKAWA TOSHIMI , ARAI KEIJI , TAKAHASHI NORYOSHI
IPC分类号： F16C32/04

36. 发明专利

JPS5833936B2 失效
公开(公告)号：JPS5833936B2
公开(公告)日：1983-07-23
申请号：JP3557379
申请日：1979-03-28
申请人： HITACHI LTD
发明人： ABUKAWA TOSHIMI , ARAI KEIJI , OKUDA HIROSHI
IPC分类号： F16C32/04

37. 发明专利

JPS5826265B2 失效
公开(公告)号：JPS5826265B2
公开(公告)日：1983-06-01
申请号：JP13290575
申请日：1975-11-07
申请人： HITACHI LTD
发明人： ARAI KEIJI , OKUDA HIROSHI , ABUKAWA TOSHIMI
IPC分类号： H02K49/02 , H02K7/09 , H02K49/04

38. 发明专利

JPS56133931A ASYNCHRONOUS DETECTOR FOR AC ROTARY ELECTRIC MACHINE 失效
公开(公告)号：JPS56133931A
公开(公告)日：1981-10-20
申请号：JP3611580
申请日：1980-03-24
申请人： HITACHI LTD
发明人： ABUKAWA TOSHIMI , TAKAHASHI NORIYOSHI , ARAI KEIJI
IPC分类号： H02K19/36 , H02H3/08 , H02H7/08

39. 发明专利

JPS5683255A FLAT TYPE MOTOR 失效
公开(公告)号：JPS5683255A
公开(公告)日：1981-07-07
申请号：JP15914179
申请日：1979-12-10
申请人： HITACHI LTD
发明人： ARAI KEIJI , ABUKAWA TOSHIMI , OKUDA HIROSHI , SAITOU TOSHIO
IPC分类号： H02K21/24 , H02K1/12 , H02K19/08 , H02K23/54
摘要： PURPOSE:To improve working efficiency for a winding without increasing a magnetic resistance between a rotor and a stator core by providing a pole shoe on the surface of the ring stator core facing to the rotor so that it comes closer to the rotor than ring stator winding. CONSTITUTION:A ring stator core 7 is divided, for example, into a plural pieces, a stator winding 9 which is formed annularly beforehand is fitted in necessary number, and a U-shaped pole shoe 8 is provided on the stator core 7 between the stator windings 9 and opposite to a rotor 3. The pole shoe 8 is constituted to come nearer to the rotor 3 side than the stator winding 9, and the stator core 7, stator winding 9 and pole shoe 8 are covered with a resin layer, which are fixed on a fixed member 11. Then, the stator core 7 and the pole shoe 8 can be formed integrally.

40. 发明专利

JPS54115716A HYSTERESIS MOTORS 失效
公开(公告)号：JPS54115716A
公开(公告)日：1979-09-08
申请号：JP2210478
申请日：1978-03-01
申请人： HITACHI LTD
发明人： ARAI KEIJI , OKUDA HIROSHI , MIYASHITA KUNIO , SUGIURA YASUYUKI , ABUKAWA TOSHIMI
IPC分类号： H02K19/08
摘要： PURPOSE:To detect a pulsating frequency of an input pulsating current at an asynchronous operating time and to perform a detection of a motor speed by making a magnetic route area at a location aparting 90 deg. electrically upon a rotor narrow by a groove etc. CONSTITUTION:One pair of an air gap groove 8 is provided at a diametal direction on a location aparting 90 deg. electrically of an opposing surface to a stator iron core 2 and a stator winding 3 of a rotor 5 or on its opposite surface or on both surfaces. In this manner at a time of an asynchronous operation there appears a case receiving a change of a magnetic reluctance on a rotor 5 and a case not receiving alternatively and a motor current results to pulsate accordingly. This motor pulsating frequency appears to be a frequency of two times of a rotor slip speed. Accordingly detecting a pulsating frequency of this motor current, by substracting this from a power source frequency a speed of a motor can be known with ease.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式