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1. 发明专利

JP2005117896A Three-level power converter 审中-公开
标题翻译：三电平转换器
公开(公告)号：JP2005117896A
公开(公告)日：2005-04-28
申请号：JP2004360868
申请日：2004-12-14
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NAKADA KIYOSHI , TANAMACHI TOKUNOSUKE , NAKAMURA KIYOSHI , TERUNUMA MUTSUHIRO , SUZUKI MASAHITO , TSUTSUI YOSHIO , TOYODA EIICHI
IPC分类号： H02M7/48 , H02M7/483 , H02P27/06 , H02P5/41
摘要： PROBLEM TO BE SOLVED: To prevent discontinuous sound by controlling an output voltage of a three-level inverter from zero to maximum and realizing control of the generation of three-level pulse for continuously and smoothly performing an inverter output voltage. SOLUTION: This three-level power converter includes a power converter for converting a DC power into an AC phase voltage, having three-level potentials that are positive, negative, and intermediate voltages, and a controller for controlling acceleration/deceleration of an AC motor connected to the output side of the power converter. In a low-speed region in acceleration/deceleration control, a first pulse width modulation control region, in which positive/negative voltage pulses are alternately outputted via an intermediate voltage, is given for the whole region of the half period of the output voltage basic wave of the converter. In a high-speed region in the acceleration/deceleration control, a second pulse width modulation control region, which has a first period when the plurality of the voltage pulses of identical polarity are outputted continuously and a second period, when the positive and negative voltage pulses are alternately outputted via the intermediate voltage before/after the first period, is given in the half period of the output voltage basic wave of the converter. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了通过将三电平逆变器的输出电压从零到最大控制来防止不连续的声音，并且实现用于连续且平稳地执行逆变器输出电压的三电平脉冲的产生的控制。解决方案：该三电平电力转换器包括用于将DC电力转换为AC电压的功率转换器，具有三级电位为正，负和中间电压，以及用于控制加速/减速的控制器连接到电力转换器的输出侧的AC电动机。在加速/减速控制的低速区域中，对于输出电压基准的半周期的整个区域，给出通过中间电压交替输出正/负电压脉冲的第一脉宽调制控制区域波的转换器。在加速/减速控制的高速区域中，当正，负电压连续输出具有相同极性的多个电压脉冲的第一周期的第二脉冲宽度调制控制区域和第二周期时，在转换器的输出电压基波的半周期中给出脉冲在第一周期之前/之后通过中间电压交替输出。版权所有（C）2005，JPO＆NCIPI

2. 发明专利

JP2004104995A Power conversion apparatus 有权
标题翻译：功率转换装置
公开(公告)号：JP2004104995A
公开(公告)日：2004-04-02
申请号：JP2003355981
申请日：2003-10-16
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NAKADA KIYOSHI , TANAMACHI TOKUNOSUKE , NAKAMURA KIYOSHI , TERUNUMA MUTSUHIRO , SUZUKI MASAHITO , TSUTSUI YOSHIO , TOYODA EIICHI
IPC分类号： B60L9/18 , H02M7/48 , H02M7/483 , H02P27/08 , H02P7/63
摘要： PROBLEM TO BE SOLVED: To prevent a sound of discontinuity, by realizing pulse generation control of three levels performed continuously further smoothly in output voltage of an inverter with the output voltage of the three-level inverter controllable from zero to the maximum. SOLUTION: The power conversion apparatus for an electric vehicle, provided with a power converter converting DC power into AC phase voltage having a potential of three levels of, positive, negative, and intermediate voltages, and a control device acceleration/deceleration controlling an AC motor connected to an output side of this power converter, is constituted by providing a first pulse width modulation control region alternately outputting a positive/negative voltage pulse through the intermediate voltage over the total region of a half period of the output voltage fundamental wave of the power converter in a low speed region in the acceleration/deceleration control, and a second pulse width modulation control region having a first period continuously outputting a plurality of the voltage pulses of the same polarity in a half period of the output voltage fundamental wave of the power converter in a high speed region in the acceleration/deceleration control and having a second period alternately outputting a positive/negative voltage pulse through the intermediate voltage before/after the concerned first period. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题为了防止不连续的声音，通过实现三电平转换器的输出电压从零到最大可控的逆变器的输出电压中连续进行的三电平的脉冲发生控制。解决方案：一种电动车辆的电力转换装置，具有将直流电变换为具有三级，正，负和中间电压的电压的交流相电压的电力转换装置，以及控制装置的加速/减速控制连接到该功率转换器的输出侧的AC电动机通过在输出电压基波的半周期的总区域内提供交替输出正负电压脉冲的第一脉冲宽度调制控制区域的第二脉冲宽度调制控制区域，在第一脉冲宽度调制控制区域中，在输出电压基波的半个周期内连续输出多个相同极性的电压脉冲的功率转换器在加速/减速控制中的高速区域中，并且具有第二个碘在有关的第一周期之前/之后交替地通过中间电压输出正/负电压脉冲。版权所有（C）2004，JPO

3. 发明专利

JP2003180084A POWER CONVERSION DEVICE 审中-公开
公开(公告)号：JP2003180084A
公开(公告)日：2003-06-27
申请号：JP2002337530
申请日：2002-11-21
申请人： HITACHI LTD
发明人： NAKADA KIYOSHI , TANAMACHI TOKUNOSUKE , NAKAMURA KIYOSHI , TERUNUMA MUTSUHIRO , SUZUKI MASAHITO , TSUTSUI YOSHIO , TOYODA EIICHI
IPC分类号： H02M7/48 , H02M7/483 , H02M7/5387
摘要： PROBLEM TO BE SOLVED: To control the output voltage of a three-level inverter from zero to maximum, to control the generation of pulses for three levels for making an output voltage continuous and smooth, and to prevent a discontinuous sound. SOLUTION: A power conversion device is provided with a power converter converting a direct current into a AC phase voltage having the potential of three levels, which are positive, negative and intermediate voltages, and with a controller which controls the acceleration/deceleration of an AC motor connected to the output side of the converter. In a low-speed region in acceleration/ deceleration control, a first pulse width modulation controlled region where positive and negative voltage pulses are alternately outputted through the intermediate voltage is given for the whole region of the half period of an output voltage basic wave from the converter. In a high-speed region in acceleration/ deceleration control, a second pulse with modulation control region, having a first period when the multiple voltage pulses of the same polarity are continuously outputted and a second period when the positive and negative voltage pulses are alternately outputted via the intermediate voltage prior to and after the first period is installed in the half period of the output voltage fundamental wave of the converter. COPYRIGHT: (C)2003,JPO

4. 发明专利

JP2003111500A POWER CONVERTER 审中-公开
公开(公告)号：JP2003111500A
公开(公告)日：2003-04-11
申请号：JP2002276762
申请日：2002-09-24
申请人： HITACHI LTD
发明人： INARIDA SATOSHI , TANAMACHI TOKUNOSUKE , NAKADA KIYOSHI
IPC分类号： B60L9/24 , H02P21/00 , H02P21/05 , H02P21/22 , H02P23/04 , H02P23/07 , H02P27/04 , H02P27/08
摘要： PROBLEM TO BE SOLVED: To suppress a beat due to a pulse component included in the DC input voltage of an inverter. SOLUTION: The power converter comprises a converter for converting a single-phase AC into a DC voltage, a filter capacitor, the inverter for converting the DC of the capacitor into an AC to supply the AC to an AC motor, a means for detecting the instantaneous current of the output of the inverter, a means 21 for converting the current via a rotary coordinate system coordinates to vector calculate the current components of orthogonal 2-axes (exciting component, torque component), and a vector control means 32 for controlling the frequency (or the phase) of the AC output of the inverter so that at least the calculated torque current component becomes its command value. The power converter further comprises regulating means 34, 36 for calculating the generated torque of the AC motor from the current components of the two-axes, and detecting only the pulse component is association with the rectification of the converter included in the generated torque to regulate the frequency (or the phase) of the AC output of the inverter based on the detected value, so that the detected value of the pulse component approaches to zero.

5. 发明专利

JP2001238498A CONTROL UNIT OF INVERTER CONTROL VEHICLE 失效
公开(公告)号：JP2001238498A
公开(公告)日：2001-08-31
申请号：JP2000052082
申请日：2000-02-23
申请人： HITACHI LTD
发明人： HISADA MASAKAZU , TANAMACHI TOKUNOSUKE
IPC分类号： B60L9/18 , H02P21/00 , H02P21/04 , H02P21/22 , H02P23/03 , H02P23/07 , H02P23/16 , H02P27/04 , H02P27/08
摘要： PROBLEM TO BE SOLVED: To reduce the influence which parameter errors exert upon a current control system, torque, etc., by resetting the parameters of the constants for vector control so as to cause coincide with real circuit constants of an induction motor. SOLUTION: This control unit is equipped with a resetting means 8 of constants which resets the following constants when an inverter is stopped; (1) secondary resistance constants of a vector control means, on the basis of the ratio of a torque current output command Iq* after adjustment to a torque current command Iqp before adjustment in a prescribed high-speed region of the motor, (2) excitation inductance constants of the vector control means, on the basis of the ratio of an excitation current detected value Id to an excitation current command Idp in the prescribed high-speed region and in a state that the torque current command Iqp is zero, (3) first and second leakage inductance constants of the vector control means, on the basis of a ratio of the excitation current detected value Id to the excitation current command Idp in the prescribed high-speed region, and (4) primary resistance constants of the vector control means, on the basis of the ratio of the excitation current detected value Id to the excitation current command Idp in prescribed low-speed region and the prescribed high speed region of the motor.

6. 发明专利

JP2001238497A DRIVE CONTROL UNIT OF INDUCTION MOTOR 失效
公开(公告)号：JP2001238497A
公开(公告)日：2001-08-31
申请号：JP2000048922
申请日：2000-02-21
申请人： HITACHI LTD
发明人： KOJIMA TETSUO , TANAMACHI TOKUNOSUKE , SHIMADA MOTOMI , NAKADA KIYOSHI
IPC分类号： H02P21/00 , H02P21/04 , H02P21/18 , H02P21/22 , H02P21/24 , H02P23/03 , H02P23/07 , H02P27/04
摘要： PROBLEM TO BE SOLVED: To surely reduce a speed by estimating a speed stably as far down as a very low speed, in a vector control system of an induction motor which system does not use a speed sensor. SOLUTION: This drive control unit of an induction motor is equipped with a power converter 4 for driving an induction motor 5, a current-detecting means 6 for detecting an AC current supplied to the motor 5, a converting means 7 for converting a detected AC current into a current (d-axis current) of a magnetic flux axis (d axis) of a rotating field coordinate system and a component (q-axis current) perpendicular to the d axis, first speed estimating means 11, 12 for forming a speed estimated value Fr from the q-axis current Iq, and means 1, 3 for driving and controlling the motor 5 on the basis of the speed estimated value. Second speed estimating means 10, 12 are installed and form a speed estimated value from a d-axis current command value Id* and a q axis current command value Iq*. When the speed estimated value becomes lower than or equal to a prescribed value during decelerating operation, the motor 5 is controlled by switching the first speed-estimating means to the second speed estimating means.

7. 发明专利

JPH10262378A POWER CONVERTER 失效
公开(公告)号：JPH10262378A
公开(公告)日：1998-09-29
申请号：JP11815698
申请日：1998-04-28
申请人： HITACHI LTD
发明人： NAKADA KIYOSHI , TANAMACHI TOKUNOSUKE , NAKAMURA KIYOSHI , TERUNUMA MUTSUHIRO , SUZUKI MASAHITO , TSUTSUI YOSHIO , TOYODA EIICHI
IPC分类号： B60L9/18 , H02M7/48 , H02M7/483 , H02P27/08 , H02P7/63
摘要： PROBLEM TO BE SOLVED: To continuously and smoothly regulate an output voltage from zero to maximum by providing a dipolar modulation mode, a partial dipolar modulation mode, a unipolar modulation mode, and means for transferring between the modes. SOLUTION: This power converter comprises a multi-pulse generating means 1 for outputting a dipolar modulated waveform, unipolar modulated waveform or overmodulated waveform in accordance with output voltage relating information and transfer control information, one pulse germinating means 2 for outputting (in one pulse mode) a one-pulse waveform according to output voltage relating information, and a transfer control means 3 for continuously transferring respective PWM modes. In this case, a gate signal of an output of the means 3 is given to a switching element in a switching unit of each phase via a gate amplifier, and on-off controlled. Thus, even at the time of the overmodulation, more stable voltage can be supplied.

8. 发明专利

JPH0956005A CONTROLLER FOR ELECTRIC VEHICLE 失效
公开(公告)号：JPH0956005A
公开(公告)日：1997-02-25
申请号：JP21042695
申请日：1995-08-18
申请人： HITACHI LTD
发明人： TANAMACHI TOKUNOSUKE , NAKAMURA KIYOSHI
IPC分类号： B60L9/18 , B60L3/10 , H02P27/06 , H02P5/41
摘要： PROBLEM TO BE SOLVED: To accelerate/decelerate a vehicle with a torque close to the limit adhesion between the wheel and the rail by generating a time variation rate command of the reference frequency higher than the time variation rate of the output frequency from an inverted at the time of acceleration/deceleration regardless of the rotation frequency of an induction motor for the vehicle and then regulating the time variation rate command at the time of idling/skidding. SOLUTION: A current command generation means 4 generates a current command Ip based on a notch command and a load received from a main controller 200 and a rotational frequency Fr of an induction motor 3. A frequency time variation generating means 6 subtracts 61 the current command Ip from the output current Im of an inverter 2. Signals from a reference frequency time variation command generation means 7 and an idling/skidding detection means 8 are subjected to addition/subtraction 64 is order to control the voltage 10 through an inverter output frequency command generation means 9 before generating 11 a gate signal for the inverter 2. Upon elapsing a predetermined time after a condition Ip>Im is satisfied, a readhesion means 13 modifies the Ip based on the Im and delivers the modified Ip to the current command generation means 4.

9. 发明专利

JPH06209579A POWER CONVERTER 失效
公开(公告)号：JPH06209579A
公开(公告)日：1994-07-26
申请号：JP32660193
申请日：1993-12-24
申请人： HITACHI LTD
发明人： TANAMACHI TOKUNOSUKE , NAKAMURA KIYOSHI , NAKADA KIYOSHI , TSUTSUI YOSHIO , MIYAKE WATARU , SUZUKI KATSUAKI
IPC分类号： H02M7/48 , H02P27/06 , H02P7/63
摘要： PURPOSE:To improve suppression accuracy of beat phenomenon by detecting the pulsation of DC input voltage due to rectification of a converter and then adjusting the output frequency of an inverter accordingly. CONSTITUTION:The DC component E0 of an inverter input voltage E is detected by a detection means 142 and the pulsating component DELTAE0 of the input voltage of an inverter 4 is detected by a detection means 141 with a specific phase difference alpha. The output DELTAE0' of the detection means 141 is divided by the output E0 of the detection means 142 using a division means 143 to obtain the degree of voltage pulsation DELTAE0'/E0. Further, the output of the division means 143 is multiplied by the output f0 of an addition/subtraction means 9 using a multiplication means 144 for outputting an adjusting component DELTAf0 (=DELTAE0'f0/E0) of inverter frequency, thus improving the suppression phenomenon of beat phenomenon.

10. 发明专利

JPH05300750A 失效
公开(公告)号：JPH05300750A
公开(公告)日：1993-11-12
申请号：JP10426092
申请日：1992-04-23
申请人： HITACHI LTD
发明人： NAKADA KIYOSHI , TANAMACHI TOKUNOSUKE , TERUNUMA MUTSUHIRO , SUZUKI MASAHITO , NAKAMURA KIYOSHI , TOYODA EIICHI , SAITO HIDEJI , MATSUI TAKAYUKI
IPC分类号： B60L9/22 , H02M7/48 , H02M7/497
摘要： PURPOSE:To equalize the current of a switching element, which constitutes the main circuit of an inverter, and equalize calorific value, and downsize a device by shortening the zero voltage period in a dipolar modulation period than other voltage output period. CONSTITUTION:A fundamental wave voltage command generating means 1 determines an inverter output voltage command Asintheta receiving the frequency command F1* of inverter output voltage, an output voltage execution value command E*, and DC voltage ed1 and ed2, and outputs it to an amplitude command distributing means 2. A bias setting means 4 outputs the quantity B of bias being set according to inverter frequency F1* and a fundamental wave amplitude command value A, and the amplitude command distributing means 2 generates a positive amplitude command ap* and negative amplitude command an* and a pulse generating and distributing means 3 generates PWM pulse rows S1-S4 being given to the switching element based on these. Here, in the bias setting means 4, the zero voltage period in dipolar modulation is set small.

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