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31. 发明专利

JPS5350431A ABNORMALITY DETECTING CIRCUIT FOR THYRISTOR CONVERTER 失效
公开(公告)号：JPS5350431A
公开(公告)日：1978-05-08
申请号：JP12491576
申请日：1976-10-20
申请人： HITACHI LTD
发明人： AZUSAWA NOBORU , KAMIYAMA KENZOU
IPC分类号： H02M7/162 , H02H7/125 , H02M7/155
摘要： PURPOSE:To detect abnormality of thyristor accurately in such a manner that current flowing during time period other than conducting period determined by firing pulse is detected and decided to be abnormal when it is detected more than two times in sequence.

32. 发明专利

JPS534809A CONTROLLER FOR THYRISTOR MOTOR 失效
公开(公告)号：JPS534809A
公开(公告)日：1978-01-17
申请号：JP7776376
申请日：1976-07-02
申请人： HITACHI LTD
发明人： AZUSAWA NOBORU , KAMIYAMA KENZOU
IPC分类号： H02P6/08
摘要： PURPOSE:To reduce capacity of gate pulse amplifier by shortening gate signal width of thyristor constituting reverse converter for thyristor motor.

33. 发明专利

JPS62233766A SPEED DETECTING METHOD 失效
公开(公告)号：JPS62233766A
公开(公告)日：1987-10-14
申请号：JP7775286
申请日：1986-04-04
申请人： HITACHI LTD
发明人： WATANABE KAZUHISA , MIYAHARA YOJIRO , TACHIKAWA MAKOTO , TAKAHASHI JUNICHI , AZUSAWA NOBORU
IPC分类号： G01P3/489
摘要： PURPOSE:To obtain excellent control response for speed detection at the time of a change in moving direction by using a reversible counter and adding a negative counted value (i.e. subtracting) during reversing operation. CONSTITUTION:Pulses phiA and phiB which are 90 deg. out of phase with each other are always supplied from a PLG according to the rotation of an electric motor and a rotating direction detector 8 detects normal rotation and reverse rotation instantaneously from the two-phase pulses. A signal FWD corresponding to the normal rotation or PVS corresponding to the reverse rotation is outputted as a high-level signal. A count pulse generator 12 is supplied with PPLG obtained by EORing the two-phase pulses and converting the two-phase pulses into one- phase pulses and an oscillator 13 outputs clock pulses PCLK. The counting result is read by registers 15 and 16 and the value of the register 15 is divided by the value of the register 16 to obtain a speed detected value.

34. 发明专利

JPS6244305B2 失效
公开(公告)号：JPS6244305B2
公开(公告)日：1987-09-19
申请号：JP13973781
申请日：1981-09-07
申请人： HITACHI LTD
发明人： TAKAKURA MITSUO , SHIMOYAMA KAZUHIKO , OKAMOTO TADASHI , AZUSAWA NOBORU , YOSHIDA OSAO , SAITO YUTAKA , SAKURAI TAKAKAZU , KITANI SUSUMU , KIKUCHI JUJI , UEKANE YOSHIHIRO
IPC分类号： G06F15/16 , G06F11/20 , G06F13/366 , G06F15/177

35. 发明专利

JPS61251472A MASTER/SLAVE SYSTEM POWER SOURCE 失效
公开(公告)号：JPS61251472A
公开(公告)日：1986-11-08
申请号：JP8867385
申请日：1985-04-26
申请人： HITACHI LTD , AIGA DENSHI KOGYO KK
发明人： NOMOTO YASUNARI , AZUSAWA NOBORU , MASUKO MASASUKE
IPC分类号： H02M3/28
摘要： PURPOSE:To reduce a voltage change rate at load current change time by always switching both a master side power source and a slave side power source even in a range that a request load current is small. CONSTITUTION:The output pulse of an error amplifying pulse width modulator 11, i.e., a drive signal is supplied to not only a driver 13 but a driver 13s. Thus, the output pulse of the modulator 11, i.e., the drive signal is simultaneously supplied to the driver 13s of the slave side. Thus, both a master power sources 10 and a slave power source 20 are always switched irrespective of the magnitude of a load capacity. Thus, even when a request load current is abruptly varied, it can be corresponded without time delay to perform a constant-voltage power source having small current change rate at the load current change time.

36. 发明专利

JPS6183965A Speed detector 失效
标题翻译：速度检测器
公开(公告)号：JPS6183965A
公开(公告)日：1986-04-28
申请号：JP20415884
申请日：1984-10-01
申请人： Hitachi Ltd
发明人： TACHIKAWA MAKOTO , AZUSAWA NOBORU
IPC分类号： G01P3/46
CPC分类号： G01P3/46
摘要： PURPOSE:To accurately detect a rotary speed even in a region low in the number of rotations, by eliminating influence of voltage drop of the diode of a three-phase full wave rectifier in a positive direction. CONSTITUTION:Three phase outputs U, V, W of a three-phase AC generator 1 constituted of a synchronous generator using DELTA-connection are inputted to a resistor network 2 of Y-connection. The network 2 is constituted by the Y- connection of three resistors 21, 22, 23 having the same resistance value and earthed at the neutral point thereof. The outputs eu, ev, ew of the network 2 are respectively inputted to ideal full-wave rectifier circuit 3, 4, 5 and the neutral point of the network 2 are also connected to the circuit 3, 4, 5 and the outputs ¦eu¦, ¦ev¦, ¦ew¦ of the circuits 3, 4, 5 are inputted to a max. value selection circuit 6 to output detection voltage VSP. As mentioned above, by converting the line voltage output of the three-phase AC dynamo 1 to phase voltage output, earth potential is secured and the voltage drop of the diode in a positive direction is perfectly compensated by performing full-wave rectifica tion at every phase voltage to obtain ideal detection voltage. Therefore, a rotary speed is accurately detected even in a region low in the number of rotations.
摘要翻译：目的：通过消除三相全波整流器的二极管的电压降在正方向上的影响，即使在低转速区域也能正确检测转速。构成：由使用DELTA连接的同步发电机构成的三相交流发电机1的三相输出U，V，W输入到Y型连接的电阻网络2。网络2由具有相同电阻值并在其中性点接地的三个电阻器21,22,23的Y形连接构成。网络2的输出eu，ev，ew分别输入到理想的全波整流电路3,4,5，网络2的中性点也连接到电路3,4,5和输出端 |，| |||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 值选择电路6输出检测电压VSP。如上所述，通过将三相交流发电机1的线路电压输出转换成相电压输出，确保了接地电位，并且通过在每个方向执行全波整流来正确地补偿二极管在正方向上的电压降相电压获得理想的检测电压。因此，即使在转数低的区域也能够精确地检测出转速。

37. 发明专利

JPS6056067B2 失效
公开(公告)号：JPS6056067B2
公开(公告)日：1985-12-07
申请号：JP2868579
申请日：1979-03-14
申请人： HITACHI LTD
发明人： AZUSAWA NOBORU
IPC分类号： H02M7/155 , H02M1/08 , H02M7/162

38. 发明专利

JPS6048996B2 失效
公开(公告)号：JPS6048996B2
公开(公告)日：1985-10-30
申请号：JP12491576
申请日：1976-10-20
申请人： HITACHI LTD
发明人： AZUSAWA NOBORU , KAMYAMA KENZO
IPC分类号： H02M7/162 , H02H7/125 , H02M7/155

39. 发明专利

JPS6027270B2 失效
公开(公告)号：JPS6027270B2
公开(公告)日：1985-06-28
申请号：JP12254378
申请日：1978-10-06
申请人： HITACHI LTD
发明人： AZUSAWA NOBORU
IPC分类号： H02M7/155 , H02M7/145 , H02P7/292

40. 发明专利

JPS60113684A VECTOR CONTROLLER OF INDUCTION MOTOR 失效
公开(公告)号：JPS60113684A
公开(公告)日：1985-06-20
申请号：JP21916583
申请日：1983-11-21
申请人： HITACHI LTD
发明人： AZUSAWA NOBORU
IPC分类号： H02P27/04 , H02P21/00 , H02P21/04 , H02P21/08 , H02P21/22 , H02P23/03 , H02P23/07 , H02P23/08 , H02P23/16 , H02P27/08
摘要： PURPOSE:To correct the slip frequency even at low speed time including zero speed by correcting the slip by an exciting current component. CONSTITUTION:A current detector 14 obtain a torque current component it' and an exciting current component im' from the primary current i1, and a voltage detector 19 obtains a reactive voltage component eq from a voltage detection value v1. A current vector calculator 8 outputs the primary current command i1* in response to an exciting current command im* and a deviation between a torque current command it* and torque current component it'. A pulse width modulation controller 7 controls an inverter 2 in response to a deviation between the primary current command i1* and the primary current i1. A multiplier 23 multiplies the deviation between the command im* and the component im' by a slip frequency command Ws and outputs a slip frequency correction signal DELTAWs.

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