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21. 发明专利

JPS6055223A ROTARY MAGNETIC SENSOR 失效
公开(公告)号：JPS6055223A
公开(公告)日：1985-03-30
申请号：JP16314383
申请日：1983-09-07
申请人： HITACHI LTD
发明人： KAWAMATA SHIYOUICHI , TAKAHASHI TADASHI , MIYASHITA KUNIO
IPC分类号： G01D5/245 , G01D5/14 , G01D5/16
摘要： PURPOSE:To obtain a stable output and to fit the titled sensor easily at the time of mounting by satisfying the length of a magneto-resistance effect element to the track width of a magnetic signal recorded in a rotary drum with a prescribed condition. CONSTITUTION:The rotary drum 2 having a signal track 3 is fixed on a shaft 6 of a motor 5 and the magneto-resistance effect element 2 is arranged oppositely to the signal track 3 and fixed on a motor end plate 6 by a support 4. The signal track 3 and the magneto-resistance effect element 2 are arranged so that the center of signal track width T almost coincides with the center of the length L of the element 2 and the condition of T>L is satisfied. Consequently, a stable output is obtained without exerting the influence of leaked magnetic flux upon the element 2 and the fitting of the sensor is made easy at the time of mounting.

22. 发明专利

JPS5752231A Turn-off system of semiconductor 失效
标题翻译：半导体开关系统
公开(公告)号：JPS5752231A
公开(公告)日：1982-03-27
申请号：JP12592880
申请日：1980-09-12
申请人： Hitachi Ltd
发明人： KAWAMATA SHIYOUICHI , ONDA KENICHI , FUKUI HIROSHI , SEI MAKIO
IPC分类号： H03K17/732 , H03K17/73
CPC分类号： H03K17/73
摘要： PURPOSE:To turn off a thyristor safely and exactly, by selecting a capacitor whose internal resistance and equivalent series inductance are small, for that which supplies a gate current of negative polarity, to a gate turn-off thyristor. CONSTITUTION:The inside of acapacitor (C)10 for supplying a gate current of negative polarity of a GTO11 has internal resistances R1, R2 and equivalenet inductance L. Charging voltage of the C10 is selected below reverse voltage of the GTO11, the capacity of the C10 accumulates the quantity of charge required for turning off a maximum current of a current IA flowing between main electrodes of the GTO11, and a maximum value of its discharge current exceeds a value required for turning off the current IA, according to which a capacitor is selected. Therefore, the smaller the R1, R2 and the L of the C10 are, the larger a peak value of a gate current IGP of negative polarity becomes, also the C10 is heated low, its deterioration is prevented, and the GTO11 is turned off safely and exactly.
摘要翻译：目的：通过选择内部电阻和等效串联电感较小的电容器，为提供栅极电流为负极的电容器关闭晶闸管，关闭晶闸管。构成：用于提供GTO11负极栅极电流的电容器（C）10的内部具有内部电阻R1，R2和等效电感L.C1的充电电压选择在GTO11的反向电压以下， C10累积关闭在GTO11的主电极之间流动的电流IA的最大电流所需的电荷量，并且其放电电流的最大值超过关闭电流IA所需的值，根据该电流是电容器选择。因此，C10的R1，R2和L越小，负极性的栅极电流IGP的峰值越大，所以C10被加热到低，防止其劣化，并且GTO11被安全地关断正好。

23. 发明专利

JPS5730658A Controller for motor blower 失效
标题翻译：电机鼓风机控制器
公开(公告)号：JPS5730658A
公开(公告)日：1982-02-18
申请号：JP10248580
申请日：1980-07-28
申请人： Hitachi Ltd
发明人： KAWAMATA SHIYOUICHI , SUGIURA YASUYUKI , MIYASHITA KUNIO , SAITOU SHIGEKI , KOIZUMI OSAMU
IPC分类号： F04D27/00 , B60L1/00 , B60L3/00 , B61C3/00 , B61C17/00 , H02P7/28 , H02P7/29
CPC分类号： Y02T10/642 , Y02T10/7241

24. 发明专利

JPS573587A CONTROLLING CIRCUIT FOR ELECTRIC MOTOR 失效
公开(公告)号：JPS573587A
公开(公告)日：1982-01-09
申请号：JP7432580
申请日：1980-06-04
申请人： HITACHI LTD
发明人： KIKUCHI SEIKI , ROKUTAN HIDEAKI , KAWAMATA SHIYOUICHI
IPC分类号： H02P3/00 , B60L1/00 , H02K9/04 , H02P5/60
摘要： PURPOSE:To reduce the number of revolutions of an electrically-driven cooling fan or stop the operation thereof while a battery fork lift is at a temporary rest and prevent said fan from producing noises, by controlling the voltage applied by an inverter which controls the drive of the electrically-driven cooling fan. CONSTITUTION:While the fork lift is traveling with a switch 14 on, a switch 7 is off, and also an PNP transistor 8 is off. Therefore, a voltage which is fed by a constant-voltage circuit 4 and dropped by a resistor 9 is applied to a terminal 13, and the output frequency or voltage from an inverter 5 to an electrically-driven cooling fan 6 rises by a portion corresponding to said voltage drop, so that the fan 6 rotates at high speed. On the other hand, while the lift is at rest, the switch 7 is on, and also the PNP transistor 8 is on. Therefore, the voltage applied to the terminal 13 is entirely what is fed from the constant-voltage circuit 4. Accordingly, the output frequency or voltage from the inverter 5 to the fan 6 drops by a voltage portion higher than the voltage applied through the resistor 9, so that the fan 6 is reduced in speed or stopped.

25. 发明专利

JPS52131104A BRUSH HOLDER MECHANISM 失效
公开(公告)号：JPS52131104A
公开(公告)日：1977-11-02
申请号：JP4774276
申请日：1976-04-28
申请人： HITACHI LTD
发明人： ABUKAWA TOSHIMI , KAWAMATA SHIYOUICHI , OONISHI KAZUO
IPC分类号： H01R39/40 , H01R39/38 , H02K5/14 , H02K13/00
摘要： PURPOSE:To reduce unevenness and noise of no-load current by providing a plurality of projections in bruch holder and inserting the projections to a slot having a rated width, provided in a base.

26. 发明专利

JPS52164A MAGNETRON 失效
公开(公告)号：JPS52164A
公开(公告)日：1977-01-05
申请号：JP7736075
申请日：1975-06-23
申请人： HITACHI LTD
发明人： YAMASHITA SEIJI , KAWAMATA SHIYOUICHI , OONISHI KAZUO
IPC分类号： H01J23/10
摘要： PURPOSE:To provide a magnetron which can oscillate stably to high output of uniform magnetic flux distribution in compact structure with additional magnetic poles in operating space.

27. 发明专利

JPS6117002A Device for magnetically detecting position 失效
标题翻译：用于磁性检测位置的装置
公开(公告)号：JPS6117002A
公开(公告)日：1986-01-25
申请号：JP9795085
申请日：1985-05-10
申请人： Hitachi Ltd
发明人： TAKAHASHI TADASHI , MIYASHITA KUNIO , KAWAMATA SHIYOUICHI
IPC分类号： G01D5/249 , G01B7/00 , G01D5/245 , H01M8/06
CPC分类号： H01M8/06
摘要： PURPOSE:To conduct detection with the same sensitivity and without any magnetic interference even from each magnetized track bearing magnetic signals different in record length from others, by providing magnetic signal elements bearing magnetic record units being continuous in required numbers in the direction of movement of a moving body and non-magnetic-field elements bearing no magnetic record units. CONSTITUTION:A rotary drum 5 fitted to a rotary body 1 through the intermediary of a rotary shaft 2 has magnetized tracks M0a-M3a which are prepared by recording magnetic signals in different record length on a magnetic recording medium on the surface of the drum, and a magnetic sensor 4a having magnetoresistance elements R01- R32 disposed thereon is provided opposite to the drum. Each track is provided with magnetic signal elements bearing magnetic poles of minimum magnetic record units which have polarities of N or S and are continuous in required numbers in the direction of movement of the drum indicated by an arrow, and with non-magnetic-field elements bearing no magnetic record units, and by this construction, magnetic detection signals are obtained. According to this constitution, magnetic signals can be detected with the same sensitivity and without any magnetic interference from each magnetized track even when it bears the signals different in record length from others.
摘要翻译：目的：通过提供具有磁性记录单元的磁信号元件，使得磁性记录单元在所需数量上沿着运动方向连续，即使从每个磁化轨道承载与其他记录长度不同的磁信号，也以相同的灵敏度和没有任何磁性干扰进行检测移动体和不带磁记录单元的非磁场元件。构成：通过旋转轴2安装在旋转体1上的旋转滚筒5具有通过将不同记录长度的磁信号记录在滚筒表面上的磁记录介质上而制备的磁化轨道M0a-M3a，以及具有设置在其上的磁阻元件R01- R32的磁传感器4a与鼓相对设置。每个轨道都设有磁信号元件，该磁信号元件带有极性为N或S的最小磁记录单元的磁极，并且在由箭头所示的滚筒的移动方向上以所需数量连续，并且具有非磁场元件没有磁记录单元，通过这种结构获得磁检测信号。根据这种结构，即使在具有与其他磁带的记录长度不同的信号的情况下，也可以以相同的灵敏度检测磁信号，并且没有来自每个磁化轨迹的任何磁性干扰。

28. 发明专利

JPS60196619A Position detecting device for moving body 失效
标题翻译：用于移动体的位置检测装置
公开(公告)号：JPS60196619A
公开(公告)日：1985-10-05
申请号：JP5217484
申请日：1984-03-21
申请人： Hitachi Ltd
发明人： KAWAMATA SHIYOUICHI , TAKAHASHI TADASHI , MIYASHITA KUNIO
IPC分类号： G01D5/245 , G01B7/00 , G01P3/44
摘要： PURPOSE: To enhance accuracy, by extracting magnetic signals of a magnetic body, which are a plurality of reference signals that are recorded in the incremental part of the surface of a moving body for one rotation or over the entire stroke, as a change in resistance of a magnetoresistance element that is arranged at facing position.
CONSTITUTION: A rotary drum 3 having a magnetic body 4, on which magnetic signals 41 and 42 are recorded, is fixed to a motor shaft 2. A magnetism sensor 6 comprising magnetoresistance effect elements R is arranged so as to face the rotary drum 3 with a small a gap l being provided. The magnetic body 4 comprises an encoder track 41 and a reference track 42. The track 41 constitutes an encoder part, in which many continuous signals are recorded. A track 42 constitutes a part, in which a plurality of reference signals are generated so that the a plurality of signals are generated for one rotation. Meanwhile, the magnetism sensor 6 comprises an encoder track 61 and a reference signal track 62, which detect the magnetic signals from the encoder track 41 and the reference track 42.
COPYRIGHT: (C)1985,JPO&Japio
摘要翻译：目的：为了提高精度，通过提取作为记录在移动体的表面的增量部分中的多个参考信号的磁体的磁信号作为一个旋转或整个行程，作为电阻的变化设置在面对位置的磁阻元件。构成：具有记录有磁信号41和42的磁体4的旋转磁鼓3被固定在电动机轴2上。包括磁阻效应元件R的磁传感器6被布置成与磁鼓3对置，提供了一个小的间隙l。磁体4包括编码器轨道41和参考轨道42.轨道41构成其中记录有许多连续信号的编码器部分。轨道42构成其中产生多个参考信号以使多个信号产生一个旋转的部分。同时，磁传感器6包括编码器轨道61和参考信号轨道62，其检测来自编码器轨道41和参考轨道42的磁信号。

29. 发明专利

JPS6086412A MAGNETIC DETECTOR 失效
公开(公告)号：JPS6086412A
公开(公告)日：1985-05-16
申请号：JP19416483
申请日：1983-10-19
申请人： HITACHI LTD
发明人： TAKAHASHI TADASHI , MIYASHITA KUNIO , KAWAMATA SHIYOUICHI
IPC分类号： G01B7/00 , G01D5/18 , G01D5/244 , G01D5/245 , G01P3/44
摘要： PURPOSE:To detect magnetic signals of respective tracks without mutual magnetic interference by constituting a magnetic body so that the positions of respective magnetic signals on adjacent magnetic signal tracks of the magnetic body are matched each other. CONSTITUTION:A track 4a of the magnetic body 4 records a magnetic signal continued in one period and a reference position track 4b records one or several signals in one revolution. If the centers of the magnetic signals N, S of both tracks 4a, 4b are denoted by MC1, MC2 respectively, the signals are recorded so that the MC1 and MC2 are arranged on one straight line in the rotary axis direction. In addition, the signals are recorded so that the N and S of the signal on the track 4a coincide with that of the signal on the track 4b. Consequently, the magnetic signals having the same polarity are arranged on the adjacent tracks 4a, 4b, so that the magnetic signals recorded in respective tracks can be detected without mutual magnetic interference.

30. 发明专利

JPS6061615A MAGNETIC POSITION SENSOR 失效
公开(公告)号：JPS6061615A
公开(公告)日：1985-04-09
申请号：JP16920083
申请日：1983-09-16
申请人： HITACHI LTD
发明人： TAKAHASHI TADASHI , KAWAMATA SHIYOUICHI , MIYASHITA KUNIO
IPC分类号： G01D5/18 , G01D5/14 , G01D5/16 , G01D5/245 , G01P3/487 , G01R33/02 , G01R33/09
摘要： PURPOSE:To attain to enhance temp. stability, by fixing and supporting the titled sensor to the back surface of a base plate, to which a magnetoresistance effect elements is arranged, in a closely adhered state through a metal plate having good heat conductivity. CONSTITUTION:A magnetic body is arranged to the surface of a rotary drum 5 attached to the rotary shaft 6 of a rotor 1 and a magnetic signal is recorded thereto. A heat equilibrium base plate 7 comprising a metal or ceramics having good heat conductivity is fixed through a fixing stand 2 and a base plate 3 for terminal processing and a circuit, and a magnetic sensor 4 is fixed to the back surface of the heat equilibrium base plate 7 in a closely adhered state. By this method, a sensor having no change in an output wave form even if atmospheric temp. is changed and excellent in temp. stability can be obtained.

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