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31. 发明专利

JPS6173592A Vibration suppressing controlling method of ac motor 失效
标题翻译：交流电动机的振动抑制控制方法
公开(公告)号：JPS6173592A
公开(公告)日：1986-04-15
申请号：JP19160884
申请日：1984-09-14
申请人： Hitachi Ltd
发明人： MUTO NOBUYOSHI , SAKAI KEIJIRO , UEDA AKITERU , ISHIBASHI AKIRA , OKAJIMA IKUO
IPC分类号： H02P25/02 , H02P27/06 , H02P27/08
CPC分类号： H02P27/08 , H02M7/53875 , H02P25/024 , H02P27/047
摘要： PURPOSE:To completely suppress the vibration of an AC motor without the type and the load of the motor nor the operating conditions such as th speed range by detecting the input current of an inverter and controlling the frequency of the inverter through a power compensator. CONSTITUTION:A current transformer 13 detects the input current ID of an inverter. This detection signal is inputted through a DC current polarity discriminator 14, a stabilization discriminator 15, a power compensator 30, a limiter 18 and a gain converter 19 to an adder 20, and added to a frequency set signal fR. Thus, when a motor abnormally vibrates, a stabilization signal having the same polarity as the basic frequency command of the inverter from when a negative DC current starts flowing and rising at the time constant within approx. twice to three times of a carrier period is added to the basic frequency of the inverter, and a stabilization signal having entirely reverse sign and symmetrical to the above stabilization signal is added thereto from when a positive DC current starts, on the contrary, flowing to suppress the vibration.
摘要翻译：目的：通过检测变频器的输入电流并通过功率补偿器控制变频器的频率，完全抑制交流电机的振动，无需电机的类型和负载以及速度范围等工作条件。构成：电流互感器13检测逆变器的输入电流ID。该检测信号通过DC电流极性鉴别器14，稳定鉴别器15，功率补偿器30，限幅器18和增益转换器19输入到加法器20，并加到频率设定信号fR上。因此，当电动机异常振动时，具有与负直流电流开始流动时的逆变器的基本频率指令的极性相同的稳定信号，将载波周期的两到三倍添加到逆变器的基本频率，并且从正的直流电流开始时向其添加具有与上述稳定信号完全相反符号和对称的稳定信号，相反地流向抑制振动。

32. 发明专利

JPS5758877B2 失效
公开(公告)号：JPS5758877B2
公开(公告)日：1982-12-11
申请号：JP2912576
申请日：1976-03-19
申请人： HITACHI LTD
发明人： OOMAE TSUTOMU , SAKAI KEIJIRO
IPC分类号： H02P7/29

33. 发明专利

JP2005051869A Drive device and xy table using same 有权
标题翻译：驱动装置和使用相同的XY表
公开(公告)号：JP2005051869A
公开(公告)日：2005-02-24
申请号：JP2003204225
申请日：2003-07-31
申请人： Hitachi Ltd , Hitachi Setsubi Eng Co Ltd , 日立設備エンジニアリング株式会社 , 株式会社日立製作所
发明人： KIM HOUNG JOONG , MAKI KOJI , TADOKORO HISAO , SHIMANE HIDEKI , SHIBATA HITOSHI , SAKAI KEIJIRO
IPC分类号： H02K41/03
摘要： PROBLEM TO BE SOLVED: To solve the problems associated with driving devices wherein: it is difficult to ensure the accuracy of mounting dimensions, in correspondence with the relative positions of a plurality of armature coils and a plurality of magnetic pole position detectors; mounting locations are limited; the overall length on the primary side becomes large; and the like.
SOLUTION: A driving device comprises a plurality of armatures having winding wound on cores formed of magnetic material arranged on the primary side; and permanent magnets, supported on the secondary side so that the permanent magnets can be moved relatively via the gaps between the permanent magnets and the armatures. The drive device is provided with magnetic pole position detectors between adjacent armatures.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了解决与驱动装置相关的问题，其中：与多个电枢线圈和多个磁极位置检测器的相对位置相对应，难以确保安装尺寸的精度; 安装位置有限; 初级侧的总长度变大; 等等。解决方案：驱动装置包括多个电枢，其具有卷绕在由主要侧布置的磁性材料形成的芯上的绕组; 和永磁体，其被支撑在次级侧，使得永磁体可以经由永磁体和衔铁之间的间隙相对移动。驱动装置在相邻的电枢之间设有磁极位置检测器。版权所有（C）2005，JPO＆NCIPI

34. 发明专利

JP2002119062A METHOD AND APPARATUS FOR PULSE WIDTH MODULATION AND POWER CONVERTER 失效
公开(公告)号：JP2002119062A
公开(公告)日：2002-04-19
申请号：JP2000304005
申请日：2000-10-03
申请人： HITACHI LTD
发明人： ISHIDA SEIJI , SAKAI KEIJIRO , OKUYAMA TOSHIAKI , FUJII HIROSHI , TOMITA HIROYUKI , ANDO TATSUO , TAKAKURA YUHACHI , KIMURA HIDEO
IPC分类号： H02M7/48 , H03K7/08
摘要： PROBLEM TO BE SOLVED: To solve a problem that, if the width of line voltage pulses is narrow when the output current of a power converter is detected from the direct current Idc of the power converter, the pulse width of the direct current Idc is reduced and the output current becomes difficult to detect. SOLUTION: When the line voltage pulse is not more than a minimum pulse width, a voltage command correcting portion 9 corrects the pulse width to 0 and integrates errors produced as the result of correction without outputting line pulses. The integrated error is added to the next line voltage, and, when the pulse width exceeds the minimum pulse width, line voltage pulses of the integrated pulse width are outputted.

35. 发明专利

JP2001145398A INVERTER CONTROL METHOD AND INVERTER CONTROL APPARATUS 失效
公开(公告)号：JP2001145398A
公开(公告)日：2001-05-25
申请号：JP32288899
申请日：1999-11-12
申请人： HITACHI LTD
发明人： SAKAI KEIJIRO , OKUYAMA TOSHIAKI , FUJII HIROSHI
IPC分类号： H02P27/04 , H02P21/00 , H02P21/14 , H02P21/18 , H02P21/22 , H02P21/24 , H02P23/07
摘要： PROBLEM TO BE SOLVED: To estimate a torque current from the detected current of one phase of an AC motor which is controlled by inverter control which practices the automatic torque boost of the motor and reduce the cost and improve the versatility. SOLUTION: An inverter 4 converts a DC power into an AC power with a variable frequency and a variable voltage in accordance with the inverter output frequency command and inverter output voltage command which are given by a calculation unit 6 to practice the variable revolution control of an AC motor 5. At that time, a torque current Iq which is to be inputted to the calculation unit 6 together with a revolution command fn* is estimated by a torque current estimation unit 11 from a reference phase θd which is the integral of an output frequency command ω* and the detected current iu of one phase (U) of the AC motor. The real current of the one phase and the estimated currents of the other two phases are inputted to the torque current estimation unit 11 for dq conversion. The outputs Id and Iq of the unit 11 are averaged and the estimated currents of the other phases are obtained by the inverse dq conversion (dq/uvw) and the estimated currents are fed back to the input side.

36. 发明专利

JP2000041381A METHOD FOR CONTROLLING CURRENT OF VOLTAGE SOURCE PWM CONVERTER 失效
公开(公告)号：JP2000041381A
公开(公告)日：2000-02-08
申请号：JP20469498
申请日：1998-07-21
申请人： HITACHI LTD
发明人： KUBO KENJI , SAKURAI YOSHIMI , KANOUDA TAMAHIKO , SAKAI KEIJIRO
IPC分类号： H02M7/155 , H02M7/12 , H02M7/219
摘要： PROBLEM TO BE SOLVED: To improve phases near LC resonance and to stabilize a current control system by controlling a converter current so that the output current on a converter side may match a current command value, and compensating the output of the current control system by means of a second-order lag filter. SOLUTION: In a voltage control system, an adder 605 adds the difference between a value detected through a low-pass filter(LPF) 601 and a DC voltage command value Vdct to the DC voltage Vdc of a PWM converter 2, and the output of the system is calculated by means of a proportional integrator 606. Then a coordinate transformer 607 converts the output into current command value of each phase. Meanwhile, the voltage control system fetches currents Iu, Iv, and Iw of the converter 2 in each phase via LPFs 602-604, and adders 608-610 add the differences between the fetched currents Iu, Iv, and Iw and the coordinate-transformed results of the output of the voltage control system. Then proportional integration compensators 611-613 calculate the voltage command values to the converter 2. Then the effects of the resonance between a reactor 4 and an LC filter 5 are removed by providing second-order lag filters 614-616 at each phase, and the outputs of the filters 614-616 are used as the voltage command values to the converter 2.

37. 发明专利

JPH1141979A CONTROL METHOD FOR INVERTER 失效
公开(公告)号：JPH1141979A
公开(公告)日：1999-02-12
申请号：JP18623597
申请日：1997-07-11
申请人： HITACHI LTD
发明人： SAKAI KEIJIRO , KUBO KENJI , ENDO TSUNEHIRO , TOMITA HIROYUKI , ISHIDA SEIJI
IPC分类号： H02P27/06 , H02P7/63
摘要： PROBLEM TO BE SOLVED: To provide a control method for an inverter with a torque level which is as high as in a vector control method. SOLUTION: A torque current It is calculated from a detected input current value Idc of an inverter. A voltage drop of a primary resistor r1 due to the torque current It is calculated and added to a V/f constant voltage Et for generating a voltage vector Vt. On the other hand a voltage vector Vm is generated to compensate the voltage drop of the primary resistor r1 caused by an exciting current in an induction motor. Then, the voltage vector Vt is added to the voltage vector Vm to calculate a motor output voltage command V1. In this way, a highly accurate torque boost control in a middle-low range is realized.

38. 发明专利

JPH1118433A PULSE WIDTH MODULATING POWER CONVERTER 失效
公开(公告)号：JPH1118433A
公开(公告)日：1999-01-22
申请号：JP16296797
申请日：1997-06-19
申请人： HITACHI LTD
发明人： BANDO AKIRA , KUBO KENJI , ENDO TSUNEHIRO , ISHIDA SEIJI , FUJII HIROSHI , IMAIE KAZUHIRO , NOMOTO YASUNARI , TOKUNAGA KIICHI , TANAKA CHIKARA , FURUKAWA KATSUYA , HOTTA TAKASHI , SAKAI KEIJIRO , OKUZAWA KATSUHIRO
IPC分类号： H02M7/219 , H02M7/06 , H02M7/12 , H02M7/155 , H02M7/48 , H02P27/06 , H02P7/63
摘要： PROBLEM TO BE SOLVED: To provide a PWM power converter which is arranged so that continuous operation can be kept, even at power ripple or load ripple, and that efficiency elevation by the reduction of loss by a switching element (circuit) can be obtained enough, without performing the control of AC voltage or DC voltage. SOLUTION: The switching elements (circuits) 2a-2f of a converter part 2 are controlled by the DC voltage detected with a voltage-detecting circuit 14, and for the switching element (circuit) of the arm connected to the phase, where the absolute value of the phase voltage has become a minimum out of three-phase AC power sources, the pulse width control is performed. For the arm connected to the residual two phases, at forward conversion operation, currents are passed to the diode elements (circuits) 2g-2l, and at reverse conversion operation, the control is performed to let a current pass to the switching element (circuit).

39. 发明专利

JPH10127056A PULSE WIDTH MODULATION CONVERTER DEVICE 失效
公开(公告)号：JPH10127056A
公开(公告)日：1998-05-15
申请号：JP28078796
申请日：1996-10-23
申请人： HITACHI LTD
发明人： SAKAI KEIJIRO , KUBO KENJI , NUMATA YUKI , FUJII HIROSHI
IPC分类号： H02M7/219 , H02M7/12 , H02M7/155
摘要： PROBLEM TO BE SOLVED: To reduce harmonics of a power supply current without increasing the inductance of an ACL, by superposing the power supply voltage and the compensation voltage necessary to cancel the harmonic voltage components by a PWM converter on the AC side voltage of the converter, so as to make the harmonic contents equivalently approximate to zero. SOLUTION: To an ALC (AC reactor) 2, the differential voltage between the voltage of a power source 1 and the AC voltage of a converter 3 is applied. Hence a voltage equivalent to the harmonic voltage and produced by the voltage of the power source 1 and the output voltage of the PWM converter 3 is superposed on the AC side voltage of the converter 3, so that harmonic currents iu, iw flowing in the ACL2 can be reduced. Consequently, the harmonic current components flowing in the ACL2 are converted from a fixed axis coordinate system into a rotary coordinate system, and detected as a DC amount. Proportional integration compensation is applied to this DC amount to use the compensation voltage of each order harmonic currents and this voltage is converted into an AC amount. The AC amount is added to the output of a fundamental wave current control system 11 so as to calculate the final converter voltage command.

40. 发明专利

JPH09154280A PWM CONVERTER CONTROLLER 失效
公开(公告)号：JPH09154280A
公开(公告)日：1997-06-10
申请号：JP33408695
申请日：1995-11-29
申请人： HITACHI LTD
发明人： SAKAI KEIJIRO , KUBO KENJI , YAMAMOTO TOSHIHIKO
IPC分类号： H02M7/219 , H02M7/12 , H02M7/48 , H02M7/537
摘要： PROBLEM TO BE SOLVED: To control distortion of an AC side voltage of a converter to make small low order harmonics of the power supply current by adding a compensating signal of a dead time compensating signal generating means to a modulation wave signal or PWM signal of the PWM converter. SOLUTION: In the case of controlling a converter 4, an effective power dividing current command Iq' depending on deviation between a detected output by a DC voltage detector 7 of a smoothing capacitor 5 and DC voltage command Vdc' is generated by a DC voltage compensating device 8, the power supply voltage phase θr of phase R is detected by a voltage detector 9 of the AC power supply 1 and power supply phase detecting means 10 and an AC current is detected by a current detector 11. Next, a current control means 13 outputs the AC side voltage commands Vux, Vvx, Vwx so that an AC reactor current i matches the current command i' of each phase and a dead time compensating signal generating means 14 generates the compensating circuits ΔVu, ΔVv, ΔVw based on the power supply voltage phase detecting value θr and effective power current command Iq' and then adds these compensating signals. As a result, distortion of the AC side voltage can be controlled and low order harmonics of the power supply current can be reduced.

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