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91. 发明专利

JPH05240070A 失效
公开(公告)号：JPH05240070A
公开(公告)日：1993-09-17
申请号：JP4094992
申请日：1992-02-27
申请人： HITACHI LTD
发明人： TAJIMA FUMIO , MORINAGA SHIGEKI , TANAE SHUNICHI , SASAKI YASUSHI , KANAZAWA HIROYUKI
IPC分类号： F02D9/02 , F02D9/08 , F02D11/10 , F02D41/22
摘要： PURPOSE:To produce a sufficient force simply and accurately without increasing the selection of pole numbers and rotation and requiring a high precision detector by transmitting the rotation of a rotor being rotated by a magnetic flux variation in stator winding to a throttle valve after being decelerated. CONSTITUTION:A throttle valve 4 is supported by a bearing 40 in an intake passage 2 of an internal combustion engine, while in the passage 2 a return spring 29, energizes this valve so as to put back in the closing direction, and a sensor 28 detects this opening. On the other hand, a throttle actuator 5 is equipped with a brushless motor 25 which is composed of a stator 23 consisting of a stator core 39 wound with a stator winding 42 and a magnetic rotor 24 consisting of a permanent magnet. In addition, the brushless motor 25 varies a current to the stator winding 42 by an output signal out of a pole position detector 27. In this case, a rotation of the magnetic rotor 24 is transmitted to the throttle valve 4 after being decelerated by a gear or a speed reducing means.

92. 发明专利

JPH05149154A VALVE DEVICE 失效
公开(公告)号：JPH05149154A
公开(公告)日：1993-06-15
申请号：JP31254491
申请日：1991-11-27
申请人： HITACHI LTD
发明人： TAJIMA FUMIO , MORINAGA SHIGEKI , TANAE SHUNICHI
IPC分类号： F02D9/02 , F02D11/10 , F16K31/04
摘要： PURPOSE:To reduce the size and the weight of an actuator by providing a stator having only one toroidal coil and a rotor having four or more permanent magnets arranged approximately at equal intervals around a rotary shaft. CONSTITUTION:An actuator comprises a stator having only one toroidal coil 5D, a rotary shaft 7, and a rotor 5A having four permanent magnets 51 arranged approximately at equal intervals around the rotary shaft 7. The totally closed position and the totally opening position of a valve body 3 are set at the rotation angle of the rotary shaft 7 at which drive torque of the actuator exceeds given torque and a control circuit 9 by which control is effected so that the valve body 3 can be operated between the totally closed position and the totally opening position is provided. As noted above, the increase of the number of magnetic poles causes the increase of drive torque and the decrease of the size of a coil, whereby the size and the weight of the actuator can be reduced.

93. 发明专利

JPH04207951A PERMANENT MAGNET-TYPE SYNCHRONOUS MOTOR AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH04207951A
公开(公告)日：1992-07-29
申请号：JP32918890
申请日：1990-11-30
申请人： HITACHI LTD , HITACHI TAGA MOTOR KK
发明人： MATSUBAYASHI JUN , TAKADA KAZUAKI , TAJIMA FUMIO , MIYASHITA KUNIO , KUBOKURA KUNIAKI , WATANABE TAKASHI
IPC分类号： H02K29/08 , H02P6/22 , H02P6/30
摘要： PURPOSE:To conduct forward and reverse rotational operation efficiently by grasping the phase shift amount preliminarily and by outputting the conduction of a stator while shifting input of the normal and reverse rotational operation command to a driving circuit from the input of a rotary magnetic pole detecting signal. CONSTITUTION:In a salient pole-structured rotor, a machine load control circuit 10 starts control of the machine load 7 and commands a location.speed control circuit 5 to start rotation control after it receives an operation command from an operation command circuit 11. The location.speed control circuit 5 controls a motor 1 so that the speed of the motor 1 may be the one ordered by a speed command circuit 6. In other words, the location.speed control circuit 5 outputs a normal rotation or reverse rotation signal and a PWM signal. Then, the normal rotation or reverse rotation signal is inputted to a pattern generation circuit 15. To the pattern generation circuit 15, a counter data is also inputted from a counter circuit 13 and a magnetic pole signal is inputted from a magnetic pole sensor 2. Then, the pattern generation circuit 15 outputs a driving pattern corresponding to the inputted signals. A driving circuit 4 drives according to this driving pattern, keeping the motor 1 driving.

94. 发明专利

JPH04127890A SPEED CONTROLLER FOR TRAVELING OBJECT 失效
公开(公告)号：JPH04127890A
公开(公告)日：1992-04-28
申请号：JP24908190
申请日：1990-09-19
申请人： HITACHI LTD
发明人： TAJIMA FUMIO , KATAYAMA HIROSHI , MIYAZAKI TAIZO , MUTO NOBUYOSHI , MORINAGA SHIGEKI , NARISHIMA SEIICHI , OSADA TOSHIO
IPC分类号： H02P29/00 , H02P29/40
摘要： PURPOSE:To obtain an appropriate correcting torque even when a load abruptly changes by detecting inherent harmonic components in the actual speed varying mode of an electric motor and adjusting the current or voltage command given to a driver from an electronic means so as to remove or reduce the harmonic components. CONSTITUTION:This speed controller is provided with the correcting signal generating means 10 surrounded by the frame of broken lines in the figure as a new element. In other words, this speed controller is provided with a means which executes proportional or proportional and integral control by using a command value which makes the sine and cosine term coefficients of inherent harmonic components of a speed signal nf or speed deviation signal ne by separately calculating the coefficients and adds a correcting signal to a current command Is by producing the correcting signal by calculating the sine and cosine values to the position. While the above example explains the case of one harmonic wave, a plurality of harmonic components can also be coped with by adding similar correcting signal generating means. In addition, any harmonic components and the number of harmonic waves to be detected can be changed freely in accordance with individual subject motors.

95. 发明专利

JPH03235689A CONTROLLING APPARATUS OR METHOD FOR POSITION OF MOVABLE BODY, SIGNAL OR MAGNETIC SIGNAL REGENERATIVE APPARATUS, AND BRUSHLESS MOTOR 失效
公开(公告)号：JPH03235689A
公开(公告)日：1991-10-21
申请号：JP2959490
申请日：1990-02-13
申请人： HITACHI LTD
发明人： TAJIMA FUMIO , KATAYAMA HIROSHI , MIYAZAKI TAIZO , MORINAGA SHIGEKI , MUTO NOBUYOSHI , NARISHIMA SEIICHI
IPC分类号： G11B5/588 , G05B13/02 , G05B19/23 , G05D3/12 , G11B5/55 , G11B15/467 , H02P6/06 , H02P6/08 , H02P6/28 , H02P21/22 , H02P21/34 , H02P25/026 , H02P27/06
摘要： PURPOSE:To reduce an irregularity in rotation by obtaining two or more past position error amounts from a drive signal of a driver, and regulating a gain in response to variation in the error amount. CONSTITUTION:A microcomputer MC calculates a position error of a difference between a position command signal and a position detection signal, multiplies the error by a gain to obtain a drive signal of a driver INV, and obtains at least two part position error amounts. If a variation in the error amount is positive and a variation in the gain is positive, the gain is reduced. If the variation in the error amount is positive and the variation in the gain is negative, the gain is increased. If the variation in the error amount is negative and the variation in the gain is positive, the gain is increased. If the variation in the error amount is negative and the variation in the gain is negative, the gain is reduced.

96. 发明专利

JPH0337396B2 失效
公开(公告)号：JPH0337396B2
公开(公告)日：1991-06-05
申请号：JP14194083
申请日：1983-08-04
申请人： HITACHI LTD
发明人： SUGIURA YASUYUKI , MORINAGA SHIGEKI , ENDO TSUNEHIRO , TAJIMA FUMIO , MYASHITA KUNIO , KATO KAZUTOSHI , MURAMATSU MASAHARU
IPC分类号： H02P29/00 , G01P3/489

97. 发明专利

JPH03105729A FOCUS DISK DEVICE 失效
公开(公告)号：JPH03105729A
公开(公告)日：1991-05-02
申请号：JP24220689
申请日：1989-09-20
申请人： HITACHI LTD
发明人： KANAZAWA HIROYUKI , NIHEI HIDEKI , MORINAGA SHIGEKI , TANAE SHUNICHI , TAJIMA FUMIO
IPC分类号： G11B7/085
摘要： PURPOSE:To reduce a power supply capacity by not simultaneously starting plural actuators so that a peak of a starting current of the actuators is a prescribed value or below. CONSTITUTION:A command selection circuit 40 is provided to control plural optical head drive actuators 5 so that they are not simultaneously started in an optical disk device provided with plural optical heads. The command selection circuit 40 is operated so as to give a start command to predetermined number of sets of the actuators 5 and to send a stop position command of the actuators 5. Thus, even when a start request signal is inputted simultaneously for plural head drive actuators 5, since the start command and the position command are selected based on the priority decided by the command selection circuit 40, the peak value of the starting current reaches a prescribed current or below. Thus, the starting current is suppressed to a prescribed value or below and the power supply is made small in size.

98. 发明专利

JPH02206382A TORQUE CONTROLLER 失效
公开(公告)号：JPH02206382A
公开(公告)日：1990-08-16
申请号：JP2581389
申请日：1989-02-06
申请人： HITACHI LTD
发明人： TAJIMA FUMIO , KATAYAMA HIROSHI , MIYASHITA KUNIO , MORINAGA SHIGEKI , NARISHIMA SEIICHI
IPC分类号： G11B15/43 , H02P6/06 , H02P6/08 , H02P6/10 , H02P6/28 , H02P29/00 , H02P29/40
摘要： PURPOSE:To realize stable tension/torque control by providing a means for detecting harmonic components existing in torque variation mode while furthermore providing a function for adding a correction value required for reduction of the harmonic components to the current or voltage to be applied onto a driver. CONSTITUTION:A driver INV for providing current or voltage having magnitude corresponding to command torque, and a microcomputer MC are provided, where the microcomputer MC comprises a means for detecting harmonic components existing in the torque variation mode provided from a torque detection circuit. Furthermore, such function as to add a correction value for reducing the detected harmonic components to the current or voltage to be applied onto the driver INV, or such function as to vary the control gain with the detected harmonic, thus reducing the harmonic components is provided. By such arrangement, current or voltage to be applied onto the driver INV can be regulated by means of the microcomputer MC.

99. 发明专利

JPH02206381A DIGITAL CONTROLLER 失效
公开(公告)号：JPH02206381A
公开(公告)日：1990-08-16
申请号：JP2581489
申请日：1989-02-06
申请人： HITACHI LTD
发明人： TAJIMA FUMIO , KATAYAMA HIROSHI , MIYASHITA KUNIO , MORINAGA SHIGEKI , NARISHIMA SEIICHI
IPC分类号： H02P29/00 , H02P6/06 , H02P6/08 , H02P6/10 , H02P6/28 , H02P29/40
摘要： PURPOSE:To quicken response at each harmonic component detecting/correcting section and to shorten time required for correction by shifting any one of detection timing or correction output timing at a plurality of harmonic component detecting/correcting sections. CONSTITUTION:Control target is a motor M, the detecting section is constituted with an encoder E and a counter COUNT, where the controlled variable is the rotation while the manipulated variable is the current command, and a portion of the control section, discriminating section and detecting section is constituted with a digital operating unit such as a microcomputer MC. The microcomputer MC processes signals fed from a pole position detecting section PS, thus performing ON/OFF control of the switching element in a driver and regulating the magnitude of current. Any one of detection timing or correction output timing at the plurality of harmonic component detecting/correcting sections is shifted.

100. 发明专利

JPH02159988A SPEED CONTROL OF MOVING OBJECT 失效
公开(公告)号：JPH02159988A
公开(公告)日：1990-06-20
申请号：JP31245788
申请日：1988-12-10
申请人： HITACHI LTD
发明人： TAJIMA FUMIO , KATAYAMA HIROSHI , MIYASHITA KUNIO , NARISHIMA SEIICHI
IPC分类号： H02P29/00
摘要： PURPOSE:To facilitate reduction of the rotation unevenness regardless of temperature change and the vibration of an apparatus by a method wherein a speed error is calculated from at least two speed error values in the past and the gain of speed control is changed in accordance with the calculated speed error. CONSTITUTION:A speed controller C is composed of a driver INV which gives a current or voltage having a magnitude corresponding to an instructed speed and a speed detecting signal, a speed detecting circuit COUNT which detects the speed by a signal from a speed detecting element and a microcomputer MC which compares the speed instruction signal with the speed signal obtained from the speed detecting circuit COUNT and drives the driver INV. A value of rotation unevenness is obtained from a speed error calculated from at least two speed error values in the past and the gain of speed control is changed in accordance with the calculated speed error. With this constitution, a moving object can be always driven with little rotation unevenness regardless of temperature change and the variation of resistance elements.

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