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101. 发明专利

JPH0469097A METHOD AND APPARATUS FOR CONTROLLING POWER CONVERTER 失效
公开(公告)号：JPH0469097A
公开(公告)日：1992-03-04
申请号：JP17185290
申请日：1990-06-29
申请人： HITACHI LTD
发明人： MATSUI TAKAYUKI , OKUYAMA TOSHIAKI , SUKEKAWA TAKASHI , TAKAHASHI JUNICHI , MATSUTAKE MITSUGI
IPC分类号： H02P21/00 , H02P21/14 , H02P21/22 , H02P23/14 , H02P23/26 , H02P27/04 , H02P27/16
摘要： PURPOSE:To improve a voltage utilization factor and a power source power factor by estimating the sum of the first and second control command values of the quantity of an alternating current based on the current command value of the quantity of a direct current and generating a tertiary harmonic wave based on the estimated value. CONSTITUTION:Estimation calculators 16 and 17 assert deviations of current detection values Id and Iq from the current command values Id* and Iq* of the quantity of a direct current, calculate the estimated output voltage command values Vd*' and Vq*' of the quantity of the direct current equivalent to an output voltage command value v*, and transmit the estimated values to a coordinate transformer 7. The coordinate transformer 7 converts Vd* and Vq* into stator coordinate systems based on coordinate reference signals sin3omegat and cos3omegat having frequency three times as high as the output angle frequency omega of a cyclo-converter 1 and transmits the output voltage command value v3* of a tertiary harmonic wave to an adder 11. The adder 11 adds the tertiary harmonic wave output voltage command value v3* to the output voltage command value v*, which is the output of an adder 10, and laps the specified tertiary harmonic wave over the output voltage of the cyclo-converter 1.

102. 发明专利

JPH03235672A CONTROL OF POWER CONVERTER 失效
公开(公告)号：JPH03235672A
公开(公告)日：1991-10-21
申请号：JP2961290
申请日：1990-02-13
申请人： HITACHI LTD
发明人： MATSUI TAKAYUKI , OKUYAMA TOSHIAKI , SAKEKAWA TAKASHI , TOBIYO MASAHIRO , TAKAHASHI JUNICHI , HIROKAWA MAKOTO , YAMASHINA MITSUNORI
IPC分类号： H02M7/493
摘要： PURPOSE:To reduce the sizes of reactors with intermediate taps by a method wherein feedback signals supplied to the output current control signals of two power converters which are connected in parallel are separated into load currents and unbalance current components and the magnitudes of the unbalance current components contained in the feedback signals of both the current control systems are made to be different from each other. CONSTITUTION:An unbalance current component between power converters 1A and 1B which are connected in parallel through reactors 27U-27W with intermediate reactors circulates between the power converters 1A and 1B. Therefore, the output current of the one power converter 1A (1B) is the sum of a load current and the unbalance current component, and the output current of the other reactor 1B (1A) is the difference between the load current and the unbalance current component. Then the freedback signals of the output current control systems of both the power converters 1A and 1B are separated into the load currents and the unbalance current components and are made to be different from each other by the magnitude of the unbalance current components contained in the feedback signals. With this constitution, the output currents can be balanced by the current control systems of both the power converters 1A and 1B.

103. 发明专利

JPH03135390A METHOD AND DEVICE FOR CONTROLLING POWER CONVERTER 失效
公开(公告)号：JPH03135390A
公开(公告)日：1991-06-10
申请号：JP27230089
申请日：1989-10-19
申请人： HITACHI LTD
发明人： MATSUI TAKAYUKI , OKUYAMA TOSHIAKI , MIYASHITA KUNIO , TAKAHASHI JUNICHI
IPC分类号： H02P27/04 , H02P21/00 , H02P21/05 , H02P21/22 , H02P21/36 , H02P23/04 , H02P23/07 , H02P23/08 , H02P23/16 , H02P23/20 , H02P27/08
摘要： PURPOSE:To measure the offset of a current detector under the state in which an AC motor is supplied with currents from a power converter, and to compensate offset by making output currents flow only through the two phase of the AC motor, detecting the output currents of the other phase and controlling the power converter. CONSTITUTION:A current detector 4U detecting the currents of the U phase of an induction motor 2 is installed on the output side of a PWM inverter 1 and a current detector 4W to W phase respectively, and a coordinate converter 16 is supplied with currents through adders 17, 18. When the output voltage of the PWM inverter 1 is used as a voltage vector orthogonal to the U phase, excitation currents fed to the induction motor 2 are made to flow only through V phase and W phase. When the detecting signal of the current detector 4U of the U phase is not brought to zero, the magnitude of the detecting signal is employed as the offset of the U-phase current detector 4U, and offset is compensated through an offset regulator 6. Accordingly, the generation of the torque ripple of the induction motor 2 can be prevented.

104. 发明专利

JPH03112391A INVERTER CONTROL METHOD AND INVERTER ON-DELAY COMPENSATING AMOUNT MEASURING METHOD 失效
公开(公告)号：JPH03112391A
公开(公告)日：1991-05-13
申请号：JP24678689
申请日：1989-09-22
申请人： HITACHI LTD
发明人： KITANI SUSUMU , TAKAHASHI JUNICHI
IPC分类号： H02M7/48 , H02P21/00 , H02P21/05 , H02P21/22 , H02P23/04 , H02P23/07 , H02P23/08 , H02P23/16 , H02P27/04 , H02P27/08
摘要： PURPOSE:To suppress fluctuation of output voltage by selecting inner voltage drop of an inverter according to the polarity of an instantaneous value current command and adding to an instantaneous value voltage command and then comparing the instantaneous value current command with a reference carrier wave signal and controlling the output signal based on a PWM signal. CONSTITUTION:A voltage command operating section 26 operates output voltage commands Vd, Vp based on exciting current command (im) and torque current command (it) and provides the operated voltage commands Vd, Vp to an instantaneous value voltage command operating unit 30. An instantaneous value current command operating unit 24 performs operation based on the exciting current command (im) the torque current command (it) and a phase reference signal F and provides the operation results to an operating unit 32. Outputs from the operating units 30, 32 are added through adders 36, 38, 40 and the addition results are fed to a comparator where the carrier signal is compared with the instantaneous value voltage command thus producing a PWM signal. The PWM signal is employed for control of an inverter 12 thus controlling the speed of a motor 10. By such arrangement, fluctuation of the output voltage from the inverter 12 can be suppressed.

105. 发明专利

JPH0332393A PWM INVERTER CONTROLLER 失效
公开(公告)号：JPH0332393A
公开(公告)日：1991-02-12
申请号：JP16078089
申请日：1989-06-26
申请人： HITACHI LTD
发明人： SUGIYAMA SHIGERU , KUNII KEIJI , KOBAYASHI KIYOTAKA , TAKAHASHI JUNICHI , CHIBA MASASHI
IPC分类号： H02P5/74
摘要： PURPOSE:To miniaturize a PWM inverter controller by so disposing switching elements at substantially equal distances from smoothing capacitors to share the capacitors. CONSTITUTION:When a plurality of PWM inverter controllers are operated, switching elements 1a-1d of the controllers are arranged in parallel, smoothing capacitors 2a, 2b are so disposed that distances between main terminals of the elements 1a-1d become equal between the elements 1a-1d, and the capacitor 2a, 2b are shared by deviating the switching timings of the elements 1a-1d. Thus, the capacities of the capacitors 2a, 2b can be reduced to miniaturize a PWM inverter controller.

106. 发明专利

JPH01194883A CONTROLLING METHOD FOR INDUCTION MOTOR 失效
公开(公告)号：JPH01194883A
公开(公告)日：1989-08-04
申请号：JP1699488
申请日：1988-01-29
申请人： HITACHI LTD
发明人： MATSUI TAKAYUKI , OKUYAMA TOSHIAKI , KUBOTA YUZURU , FUJIMOTO NOBORU , SAITO TOSHIO , TAKAHASHI JUNICHI
IPC分类号： H02P21/00 , H02P21/14 , H02P21/16 , H02P21/18 , H02P21/22 , H02P21/24 , H02P21/28 , H02P23/07 , H02P23/08 , H02P23/14 , H02P23/16 , H02P27/04
摘要： PURPOSE:To enable slip frequency to be controlled to always come to a proper value even if a primary resistance is fluctuated, by taking a signal in relation to a secondary resistance fluctuation of a motor from a voltage fluctuation quantity, and by controlling converter output frequency according to said signal. CONSTITUTION:The output of current detectors 3U-3W is fed to a coordinate converter 5 via a three-phase/two-phase converter 4. The outputs of the coordinate converter 5 and current regulators 15, 16 is fed to an arithmetic circuit 18. Output voltage fluctuation component due to the change of a secondary resistance of a motor 2 from the arithmetic unit 18 is applied to an adder 23, and the frequency of the motor 2 from an adder 26 is sent to a coordinate reference generator 13 and a voltage command arithmetic circuit 14. From the voltage command arithmetic circuit 14, the voltage component command of a revolving-field coordinate system is applied to adders 21, 22 and the output is sent to a coordinate converter 17. By the voltage command of a stator coordinate system from the coordinate converter 17, via a PWM controlling circuit 19, a power converter 1 is controlled.

107. 发明专利

JPS6192186A Controller of induction motor 失效
标题翻译：感应电动机控制器
公开(公告)号：JPS6192186A
公开(公告)日：1986-05-10
申请号：JP21137284
申请日：1984-10-11
申请人： Hitachi Ltd
发明人： MATSUI TAKAYUKI , OKUYAMA TOSHIAKI , FUJIMOTO NOBORU , KUBOTA YUZURU , TAKAHASHI JUNICHI
IPC分类号： H02P21/00 , H02P27/04 , H02P5/408
CPC分类号： H02P27/06
摘要： PURPOSE:To control to response at a high speed without using a speed detector by obtaining 2-phase components from a detected voltage for exciting current phase reference, and providing the primary delay time corresponding to the control delay of a speed control system for the speed command signal. CONSTITUTION:A voltage component detector 7 detects a 90 deg. phase difference component with respect to the exciting current component determined by a control system to be the basic wave component of a motor voltage. A voltage component detector 8 detects the same phase component for the exciting current phase reference signal of the motor voltage. A torque current i*t is controlled in response to a deviation between the speed command signal omega*r and the addition of 90 deg. phase difference component and a slip frequency. The primary delay circuit 4 outputs a 2-phase sinusoidal wave signal having a frequency proportional to the frequency command signal of a frequency converter from an oscillator 10 in response to the deviation between a signal having the primary delay time corresponding to the control delay of a speed control system to a speed command signal and the same phase voltage component.
摘要翻译：目的：通过从激励电流相位基准的检测电压获得2相分量，并且提供与速度控制系统的速度控制延迟相对应的主延迟时间，以高速度控制而不使用速度检测器命令信号。构成：电压分量检测器7检测90度。相对于由控制系统确定为作为电动机电压的基本波分量的励磁电流分量的相位差分量。电压分量检测器8检测用于电动机电压的励磁电流相位参考信号的相同相位分量。响应于速度指令信号ω* r和加法90度之间的偏差来控制扭矩电流i * t。相位差分量和滑差频率。主延迟电路4响应于具有对应于控制延迟的主延迟时间的信号之间的偏差，从振荡器10输出具有与频率转换器的频率指令信号成比例的频率的2相正弦波信号速度控制系统到速度指令信号和相同的相电压分量。

108. 发明专利

JPS6176089A Vector controller for induction motor 失效
标题翻译：电感电机矢量控制器
公开(公告)号：JPS6176089A
公开(公告)日：1986-04-18
申请号：JP19733884
申请日：1984-09-20
申请人： Hitachi Ltd
发明人： HORIUCHI HIDEKAZU , TAKAHASHI JUNICHI
IPC分类号： H02P21/00 , H02P27/04
CPC分类号： H02P21/00
摘要： PURPOSE:To prevent a control range from shifting to an unstable range by limiting the primary frequency command value so as not to exceed the point of the maximum torque slip angle frequency by a limiter at a low speed operation time. CONSTITUTION:A function generator 16 inputs a rotating angle frequency calcula tion value omegar output from a speed calculator 11, and outputs as its function a limit value omegaSL smaller than the sum [omegas(max)+omegar] of the value of the maximum torque slip angle frequency s(max) and a rotating angle frequency omegar. Since a limiter 15 limits the primary angle frequency command omega1* before the slip angle frequency omegas exceeds the frequency s(max), i.e., when arriving at the limit value omegaSL, the command omega1* does not exceeds the frequency omegas(max), but the frequency omegar gradually rises.
摘要翻译：目的：通过限制主频率指令值，通过限制器在低速运行时间内不超过最大转矩滑移角频率点，防止控制范围转移到不稳定范围。构成：函数发生器16输入从速度计算器11输出的旋转角度频率计算值ω，并作为其函数输出小于最大转矩值的总和（ωmax（ωmax）+ω）滑移角频率s（max）和旋转角频率ω。由于限制器15在滑移角频率ωmax超过频率s（max）之前限制主角频率指令ω1*，即当达到极限值ω-SL时，指令ω1*不超过频率ω（max），但频率ω逐渐上升。

109. 发明专利

JP2011182085A Radio communication system, radio communications equipment, and in-station interference measurement method 有权
标题翻译：无线电通信系统，无线电通信设备和站内干扰测量方法
公开(公告)号：JP2011182085A
公开(公告)日：2011-09-15
申请号：JP2010042557
申请日：2010-02-26
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KATADA ISAO , TAKAHASHI JUNICHI , NAGASHIMA TOSHIO , MURATA SHINJI
IPC分类号： H04B7/15 , H04B1/3822 , H04B1/40 , H04B17/19 , H04B17/23 , H04B17/29 , H04B17/318 , H04B17/345 , H04B17/40 , H04W16/26 , H04W24/04 , H04W56/00
摘要： PROBLEM TO BE SOLVED: To reduce a wraparound interference wave level among radio units concerning radio communications equipment, each individually, including a transmission/reception radio unit on a base-station side and a transmission/reception radio unit on a terminal-station side. SOLUTION: A radio communication system performs the transmission of a communication signal (a transmission signal) between the first and second radio units that includes the first and second radio units. The first and second radio unit include a transmission/reception means for performing the transmission/reception of radio waves; a reception level detecting means for detecting the levels of the received radio waves; a storage means for storing the reception levels detected by the reception detecting means; and first and second control means for controlling the transmission/reception means, the reception detecting means, and the storage means. The control means mutually generate timing information indicating timings to emit the radio waves from the respective means, so as to supply timing information to the first and second control means of the first and second radio units. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：为了减少无线电通信设备的无线电单元中的环绕干扰波电平，各自包括基站侧的发送/接收无线电单元和终端侧的发送/接收无线电单元，站侧。解决方案：无线电通信系统执行包括第一和第二无线电单元的第一和第二无线电单元之间的通信信号（发送信号）的发送。第一和第二无线电单元包括用于执行无线电波的发送/接收的发送/接收装置; 接收电平检测装置，用于检测所接收的无线电波的电平; 存储装置，用于存储由接收检测装置检测的接收电平; 以及用于控制发送/接收装置，接收检测装置和存储装置的第一和第二控制装置。控制装置相互产生指示从各个装置发射无线电波的定时的定时信息，以便向第一和第二无线电单元的第一和第二控制装置提供定时信息。版权所有（C）2011，JPO＆INPIT

110. 发明专利

JP2003102177A METHOD OF CONTROLLING POWER CONVERTER 审中-公开
公开(公告)号：JP2003102177A
公开(公告)日：2003-04-04
申请号：JP2002269359
申请日：2002-09-17
申请人： HITACHI LTD
发明人： OKUYAMA TOSHIAKI , TAKAHASHI JUNICHI , TOBISE MASAHIRO
IPC分类号： H02M5/45
摘要： PROBLEM TO BE SOLVED: To provide a power converter which has a smoothing capacitor in an intermediate dc circuit, which removes difference of direct current between converters connected through the dc circuit, suppresses fluctuation of direct current, and reduces capacity of the smoothing capacitor. SOLUTION: This power converter has two converters. A first converter converts an alternating current to the direct current and a second converts a direct current to an alternating current; both the converters are connected via an intermediate dc circuit which has a smoothing capacitor, and the second converter controls an ac output current with a current controller. In the control current of the first converter according to the current of the second converter, this power converter estimates the dc input current of the second converter, by computing including the change rate and based on the current command value of the second converter, and controls the current of the first converter, based on the estimated value.

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