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1. 发明专利

JPH02179300A VARIABLE-SPEED GENERATOR 失效
公开(公告)号：JPH02179300A
公开(公告)日：1990-07-12
申请号：JP33178788
申请日：1988-12-29
申请人： HITACHI LTD , HESCO
发明人： HIRANO KAZUAKI , OKUYAMA TOSHIAKI , YASAKA YASUHIRO
IPC分类号： H02P9/00
摘要： PURPOSE:To reduce the capacity of a controller by controlling the terminal voltage and frequency of an induction generator to predetermined values by the use of a regenerative inverter for regenerating the secondary power of the induction generator to the primary side of the induction generator. CONSTITUTION:A generator has a secondary current controller for full-wave rectifying the secondary current of an induction generator 1 and regulating the secondary current corresponding to the load of the induction generator 1 by the operation of a DC chopper 20 for short-circuiting to turn OFF the output side, and a controller 22 for controlling the terminal voltage and frequency of the induction generator 1 to predetermined values by a regenerative inverter 21 for regenerating the secondary power of the induction generator 1 to the primary side of the induction generator 1. Thus, the capacity of the regenerative inverter 21 is proportional to the secondary power, its capacity can be set to 1/several of the generated power, the element of the DC chopper 20 may be one to largely reduce the capacity of the controller.

2. 发明专利

JP2008301704A Power conversion apparatus 审中-公开
标题翻译：功率转换装置
公开(公告)号：JP2008301704A
公开(公告)日：2008-12-11
申请号：JP2008234153
申请日：2008-09-12
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NAGATA KOICHIRO , OKUYAMA TOSHIAKI , OKAMATSU SHIGETOSHI , MATSUDA TOSHIHIKO
IPC分类号： H02M7/497 , H02M7/48 , H02P27/06 , H02P27/08
摘要： PROBLEM TO BE SOLVED: To reduce a switching frequency of a converter of the power conversion apparatus and to quickly respond to a change of disturbance or the like so as to suppress it. SOLUTION: The power conversion apparatus is provided with the converter for converting DC power into AC power and an output voltage controller for comparing a voltage command value with a carrier wave signal so as to PWM control output voltage of the concerned converter in accordance with an operating state of the power converter, the voltage is changed from pulse voltage with a pattern of the output voltage pulse width controlled into the pulse voltage monotonously increasing until output voltage reaches the maximum, and into the pulse voltage monotonously decreasing until the output voltage reaches the minimum. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：为了降低功率转换装置的转换器的开关频率并且快速响应干扰等的改变以便抑制它。电源转换装置设置有用于将DC电力转换为AC电力的转换器和用于将电压指令值与载波信号进行比较的输出电压控制器，以便根据相关转换器的PWM控制输出电压在功率转换器的工作状态下，电压从脉冲电压变化，输出电压脉冲宽度的图形被调制成脉冲电压，直到输出电压达到最大值，直到脉冲电压逐渐减小，直到输出电压达到最小。版权所有（C）2009，JPO＆INPIT

3. 发明专利

JP2007259610A Synchronous motor driving apparatus 有权
标题翻译：同步电机驱动装置
公开(公告)号：JP2007259610A
公开(公告)日：2007-10-04
申请号：JP2006081906
申请日：2006-03-24
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NAGATA KOICHIRO , OKUYAMA TOSHIAKI , NEMOTO JIRO , KATAYAMA TOSHIO , AKITA YOSHITOSHI
IPC分类号： H02P21/00 , H02P6/18 , H02P27/04
摘要： PROBLEM TO BE SOLVED: To provide a synchronous motor driving apparatus capable of smoothly actuating and accelerating a synchronous motor in speed sensorless and position sensorless, and suppressing inversion. SOLUTION: This synchronous motor driving apparatus controls the magnitude of an output voltage, a frequency and a phase, adds a predetermined phase correction value to the phase in activating the synchronous motor, changes the phase correction value one or more times, and corrects the frequency or the phase on the basis of a detection value of an output current. Further, in changing the phase correction value, it is increased, for example, at each angle of not more than 90° so that the phase can be increased in the positive rotation direction of the motor. Further, in initially changing the predetermined phase correction value, a time when the initial phase correction value is set is made to be shorter than a time when the changed phase correction value is set. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种同步电机驱动装置，能够平稳地起动和加速无速度传感器和位置无传感器的同步电动机，并抑制反转。解决方案：该同步电动机驱动装置控制输出电压，频率和相位的大小，在激活同步电动机的相位上加上预定的相位校正值，改变相位校正值一次或多次，以及基于输出电流的检测值来校正频率或相位。此外，在改变相位校正值时，例如，以不大于90°的角度增加，使得可以在电动机的正向旋转方向上增加相位。此外，在初始改变预定相位校正值时，使设定初始相位校正值的时间比设定改变相位校正值的时间短。版权所有（C）2008，JPO＆INPIT

4. 发明专利

JP2006238605A Motor drive 有权
标题翻译：电机驱动
公开(公告)号：JP2006238605A
公开(公告)日：2006-09-07
申请号：JP2005049922
申请日：2005-02-25
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NAGATA KOICHIRO , OKUYAMA TOSHIAKI , NEMOTO JIRO , KATAYAMA TOSHIO
IPC分类号： H02P21/00 , H02P27/04 , H02P27/06
CPC分类号： H02P21/09
摘要： PROBLEM TO BE SOLVED: To provide a motor drive for driving an induction motor through current control, and for outputting a desired torque when the motor is started. SOLUTION: The motor drive comprises a means for calculating a current command value based on the deviation of a speed estimation value from a speed command value, a means for controlling the output current based on the current command value, and a means for calculating a frequency command value based on an output voltage command value or an output voltage detection value. When the induction motor is started, the current command value and the frequency command value are calculated directly, depending on the speed command value, and the output current and the output frequency are controlled depending on the frequency command value. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种用于通过电流控制来驱动感应电动机的电机驱动器，并且用于当电动机起动时输出期望的转矩。解决方案：电机驱动器包括用于基于速度估计值与速度指令值的偏差来计算电流指令值的装置，用于基于当前指令值控制输出电流的装置，以及用于基于输出电压指令值或输出电压检测值计算频率指令值。当感应电动机起动时，根据速度指令值，直接计算电流指令值和频率指令值，根据频率指令值控制输出电流和输出频率。版权所有（C）2006，JPO＆NCIPI

5. 发明专利

JP2004254420A Control method for induction motor 有权
公开(公告)号：JP2004254420A
公开(公告)日：2004-09-09
申请号：JP2003041978
申请日：2003-02-20
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： OGAWA TAKESHI , ISHIDA SEIJI , OKUYAMA TOSHIAKI , KOJIMA TETSUO
IPC分类号： H02P21/00 , H02P27/04
摘要： PROBLEM TO BE SOLVED: To provide a control method which enables the user to stably operate an induction motor, even in a low-speed region. SOLUTION: This control method for an induction motor includes the second control step of inputting a first excitation current command and a first torque current command, and outputting a second excitation current command and the second torque current command and the first step of inputting the second excitation current command and the second torque current command and outputting a speed estimate, when controlling the induction motor by the AC voltage of variable voltage variable frequency. For the speed estimate being smaller than a predetermined value, the magnitude of the second excitation current command is made as large as the magnitude of the second torque current command or larger. COPYRIGHT: (C)2004,JPO&NCIPI

6. 发明专利

JP2003230202A CONTROL METHOD FOR VEHICULAR INVERTER AND INVERTER CONTROLLER 审中-公开
公开(公告)号：JP2003230202A
公开(公告)日：2003-08-15
申请号：JP2002024910
申请日：2002-02-01
申请人： HITACHI LTD
发明人： OGAWA TAKESHI , ISHIDA SEIJI , OKUYAMA TOSHIAKI , KOJIMA TETSUO , NAKADA KIYOSHI
IPC分类号： B60L7/14 , B60L9/18
摘要： PROBLEM TO BE SOLVED: To provide a controller and a control method for an inverter capable of preventing a vehicle from passing through a prescribed stopping position due to insufficient braking force, and preventing generation of shock due to sudden change in the braking force if regenerative braking force lowers immediately before stopping and a pneumatic brake comes into action. SOLUTION: If filter capacitor voltage exceeds its reference value and electric power or current of a prescribed value or higher is supplied in the direction of stringing from an inverter, the magnitude of a torque command or a torque current command is decreased, thus suppressing regenerative power. COPYRIGHT: (C)2003,JPO

7. 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.

8. 发明专利

JP2002027789A VELOCITY CONTROLLER OF INDUCTION MOTOR 失效
公开(公告)号：JP2002027789A
公开(公告)日：2002-01-25
申请号：JP2000203044
申请日：2000-06-30
申请人： HITACHI LTD
发明人： AKITA YOSHITOSHI , OKUYAMA TOSHIAKI , NEMOTO JIRO , OO NORIO
IPC分类号： H02P23/00 , H02P21/05 , H02P21/22 , H02P23/04 , H02P23/07 , H02P27/05 , H02P7/635
摘要： PROBLEM TO BE SOLVED: To provide a velocity controller of an induction motor which can control the flicker without any additional device. SOLUTION: A primary current of an induction motor 2 is detected with a current detector 14, a flicker element is extracted from the primary current detection signal with a flicker detection circuit 26, and an output current of a reverse converter 10 is controlled to make zero the flicker element with a flicker suppresor controller 27.

9. 发明专利

JP2001238499A SPEED CONTROL METHOD OF INDUCTION MOTOR 失效
公开(公告)号：JP2001238499A
公开(公告)日：2001-08-31
申请号：JP2000052256
申请日：2000-02-24
申请人： HITACHI LTD
发明人： OKUYAMA TOSHIAKI
IPC分类号： H02P27/06 , H02P21/00 , H02P21/04 , H02P21/08 , H02P21/14 , H02P21/18 , H02P21/22 , H02P21/24 , H02P23/03 , H02P23/07 , H02P23/08 , H02P27/04 , H02P7/63
摘要： PROBLEM TO BE SOLVED: To provide a speed control method of an induction motor which does not generate torque decrease in a zero speed region, when motor constants fluctuate, and performs regenerative operation stably. SOLUTION: A system, which controls an output voltage and an output frequency of a power converter in response to a speed command and performs speed control of an induction motor, is equipped with an operating device 10 for obtaining a slip frequency value ωs2, an adder 11 for outputting a slip frequency estimated value ωs, an adder 12 for adding ωs to a speed command value ωr* and outputting ω1*, a d-axis current commanding device 14 outputting a d-axis current command value id* having value larger than normal, an amplifier 15 outputting a voltage command value ed*, a gain commanding device 16 for commanding a gain Gd, a q-axis current constricting device 17 for controlling a q-axis current iq to be almost equal to zero in the zero-speed region, and a gain commanding device 18 for commanding the gain Gq. When the speed command value is lower than or equal to a set value, the d-axis current is increased to be higher than or equal to a value in a normal state, the q-axis voltage command is modified according to the q-axis current detected value, and control is so performed that the q-axis current is restrained.

10. 发明专利

JP2001204195A DRIVING SYSTEM FOR AC MOTOR 失效
公开(公告)号：JP2001204195A
公开(公告)日：2001-07-27
申请号：JP2000014036
申请日：2000-01-19
申请人： HITACHI LTD
发明人： YOSHIKAWA TOSHIFUMI , ONUMA NAOTO , MITSUNE SHUNSUKE , KISHIKAWA KOSEI , IKIMI TAKASHI , OKUYAMA TOSHIAKI
IPC分类号： H02P27/06 , H02P7/63
摘要： PROBLEM TO BE SOLVED: To a motor driving apparatus equipped with control units having a mounting configuration more resistive to failure. SOLUTION: In the mounting configuration of control, a plurality of control units controlling individually a plurality of power converters are installed. Each of the control units receives an output current detected value of the power converter which a self unit controls individually, and the output current detected values of power converters except the power converter which the self unit controls. Each of the control units outputs a control command to the self power converter by using the current detected values, in such a manner that a control gain to an output current summed value and a control gain to the unbalanced component of output current of each power converter are made different from each other and an output current of the self power converter is made coincide with or be proportional to the command value.

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