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1. 发明专利

JP2013143888A Power conversion section controller, motor characteristic measurement method and program 有权
标题翻译：电力转换部分控制器，电机特性测量方法和程序
公开(公告)号：JP2013143888A
公开(公告)日：2013-07-22
申请号：JP2012003958
申请日：2012-01-12
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： AKITA YOSHITOSHI , TAMURA TAKAHIRO , NAGATA HIROSHI
IPC分类号： H02P21/00 , H02P27/04
摘要： PROBLEM TO BE SOLVED: To calculate a motor constant of an AC motor and obtain a rated torque current and a rated exciting current as a control constant required for vector control of the AC motor.SOLUTION: A motor characteristic measurement section 15 controls to change a ratio of voltage to frequency for a power conversion section 2 that varies the voltage and frequency of electric power of an AC power supply to be supplied to the AC motor 3. In first and second measurement modes, primary resistance, combined resistance and combined leakage inductance of the AC motor 3 are measured. Additionally, in a third measurement mode, a motor characteristic of the AC motor 3 is obtained from a calculation result of exciting inductance, rated torque current and rated exciting current of the AC motor 3.
摘要翻译：要解决的问题：计算交流电动机的电动机常数，并获得额定转矩电流和额定励磁电流作为交流电动机矢量控制所需的控制常数。解决方案：电动机特性测量部分15控制变更功率转换部分2的电压与频率的比率，其改变要提供给AC电动机3的交流电源的电力的电压和频率。在第一和第二测量模式中，初级电阻，组合电阻和组合的漏电感测量交流电动机3。此外，在第三测量模式中，根据励磁电感，额定转矩电流和交流电动机3的额定励磁电流的计算结果，获得交流电动机3的电动机特性。

2. 发明专利

JP2013042663A Three-phase power conversion apparatus 有权
标题翻译：三相功率转换装置
公开(公告)号：JP2013042663A
公开(公告)日：2013-02-28
申请号：JP2012261837
申请日：2012-11-30
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KATO SHUJI , SHIGYO MASAKANE , NAGATA HIROSHI
IPC分类号： H02M7/48
摘要： PROBLEM TO BE SOLVED: To provide a three-phase semiconductor power conversion apparatus capable of equalizing an overall inductance for each of a plurality of power semiconductor switching elements containing connection conductors between input/output terminals in a case where the power semiconductor switching elements are connected in parallel, with reduction of ripple of a DC capacitor being attained.SOLUTION: The even number of semiconductor packages constitute an inverter unit for each of six groups of semiconductor packages. Each two groups among the six groups of semiconductor packages are teamed to constitute one set, and the sets are functioned as U-phase, V-phase, and W-phase. The six groups of semiconductor package groups are connected with a same P-side DC bus bar and N-side DC bus bar. The P-side bus bar and the N-side bus bar are made to face each other across a thin insulating layer, so that a DC bus bar becomes low inductance. By lowering inductance of the DC bus bar among the U-phase, V-phase, and W-phase, a ripple current of a DC capacitor is reduced.
摘要翻译：要解决的问题：提供一种三相半导体功率转换装置，其能够在功率半导体开关的情况下使包含输入/输出端子之间的连接导体的多个功率半导体开关元件中的每一个的整体电感均衡元件并联连接，同时减小直流电容器的纹波。解决方案：半导体封装的偶数构成用于六组半导体封装中的每一组的逆变器单元。六组半导体封装中的两组分别组合成一组，功能为U相，V相，W相。六组半导体封装组与相同的P侧直流母线和N侧直流母线连接。 P侧母线和N侧母线横跨薄的绝缘层相互面对，从而使直流母线成为低电感。通过降低U相，V相和W相中的直流母线的电感，降低直流电容器的纹波电流。版权所有（C）2013，JPO＆INPIT

3. 发明专利

JP2013013241A Apparatus for controlling induction motor and method for controlling induction motor 有权
标题翻译：用于控制感应电动机的装置和控制电动机的方法
公开(公告)号：JP2013013241A
公开(公告)日：2013-01-17
申请号：JP2011144315
申请日：2011-06-29
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HATTORI SATORU , NAGATA HIROSHI , INOUE DAISUKE
IPC分类号： H02P21/00 , H02P27/04
摘要： PROBLEM TO BE SOLVED: To implement higher torque control than usual without compromising device durability in controlling an induction motor.SOLUTION: Constant torque control is performed to keep constant torque until a rotational speed reaches a BASE speed, and constant output control is performed to keep constant output of an induction motor between the BASE speed and a TOP speed. Normal control is such that a voltage of an excitation circuit becomes a maximum at the BASE speed, and under the constant output control, a terminal voltage increases with increasing rotational speed to maintain the maximum voltage of the excitation circuit until a maximum terminal voltage is applied at the TOP speed. Higher torque control for producing temporary higher torque is such that the terminal voltage becomes the maximum at the BASE speed, and under the constant output control, the voltage of the excitation circuit decreases with increasing rotational speed to maintain the maximum terminal voltage, with the result that an exciting current becomes higher than under the normal control.
摘要翻译：要解决的问题：实现比通常更高的扭矩控制，而不会影响控制感应电动机的装置耐久性。
解决方案：执行恒转矩控制以保持恒定转矩，直到转速达到BASE速度，并执行恒定输出控制，以保持感应电动机在BASE速度和TOP速度之间的恒定输出。正常控制使得励磁电路的电压在BASE速度下变为最大值，并且在恒定输出控制下，端子电压随着转速的增加而增加，以保持励磁电路的最大电压，直到施加最大端子电压在TOP速度。用于产生临时较高扭矩的较高扭矩控制使得端子电压以BASE速度变为最大值，并且在恒定输出控制下，激励电路的电压随着转速的增加而减小，以保持最大端电压，结果令人兴奋的电流变得比正常控制下更高。版权所有（C）2013，JPO＆INPIT

4. 发明专利

JP2012135070A Controller of ac motor system 有权
标题翻译：交流电机系统控制器
公开(公告)号：JP2012135070A
公开(公告)日：2012-07-12
申请号：JP2010282571
申请日：2010-12-20
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NISHIKAWA KEIICHIRO , NAGATA HIROSHI , AKITA YOSHITOSHI
IPC分类号： H02P27/06
摘要： PROBLEM TO BE SOLVED: To provide a controller of an AC motor system which performs terminal constant-voltage control in a simple method.SOLUTION: In the controller of the AC motor system which performs conversion between a direct current and an alternating current by a power conversion device to apply the alternating current to a motor, and finds a composite current command of an excitation current command and a torque current command to perform firing angle control over the power conversion device, excitation current command means of giving the excitation current command includes function generation means of inputting a rotating speed and outputting the excitation current command so as to perform weak field control over the motor, and the function generation means gives a first excitation current command when the rotating speed of the motor is a firsts rotating speed and a second excitation current command when the rotating speed is a second rotating speed, and supplies the excitation current command as a complementary value when the rotating speed is another rotating speed, the first excitation current command when the rotating speed is the first rotating speed and the second excitation current command when the rotating speed is the second rotating speed being such values that it is verified that the motor terminal voltage is made constant through operation using the values.
摘要翻译：解决的问题：提供以简单的方法进行端子恒定电压控制的交流电动机系统的控制器。解决方案：在交流电动机系统的控制器中，其通过电力转换装置执行直流电和交流电之间的转换，以将交流电施加到电动机，并找到励磁电流指令的复合电流指令，用于对功率转换装置执行触发角控制的转矩电流指令，提供励磁电流指令的励磁电流指令装置包括输入转速并输出励磁电流指令的功能产生装置，以便对电动机进行弱磁场控制并且当转速为第二转速时，当电动机的转速为第一转速和第二励磁电流指令时，功能产生装置给出第一励磁电流指令，并将励磁电流指令作为互补值当转速是另一个转速时，第一个励磁电流指令当转速为第二转速时，旋转速度为第一转速和第二励磁电流指令，这是通过使用该值的运算来确认电动机端子电压恒定的值。版权所有（C）2012，JPO＆INPIT

5. 发明专利

JP2014090611A Ac motor controller and soundness confirmation method of current detector of the same 有权
标题翻译：交流电机控制器及其相同的电流检测器的声音确认方法
公开(公告)号：JP2014090611A
公开(公告)日：2014-05-15
申请号：JP2012239965
申请日：2012-10-31
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TAMURA TAKAHIRO , AKITA YOSHITOSHI , NAGATA HIROSHI
IPC分类号： H02P21/00 , H02P27/04
摘要： PROBLEM TO BE SOLVED: To provide an AC motor controller which can confirm in advance whether or not a current detector is normally connected to an output terminal of a power converter.SOLUTION: An AC motor controller includes: a power converter which converts supplied power into power of a variable voltage variable frequency to drive an AC motor at variable speeds; a PWM controller which controls a power conversion function of the power converter; and a current detector abnormality determination device having abnormality determination voltage command calculation means which outputs a voltage command signal for determining abnormality of a current detector which detects a current flowing in the AC motor and abnormality determination means which determines abnormality of the current detector by the pattern of the current obtained from the current detector by applying the voltage command signal to the current converter. On the basis of an external command signal and the detection signal of the current detector, the PWM controller supplies the control signal to the power converter and the current detector abnormality determination device outputs abnormality display in the case in which it determines that the current detector has abnormality before the operation of the AC motor.
摘要翻译：要解决的问题：提供一种可以预先确定电流检测器是否正常连接到电力转换器的输出端的交流电动机控制器。解决方案：交流电动机控制器包括：功率转换器，其将供电的功率转换成可变电压可变频率的功率以可变速度驱动交流电动机; 控制功率转换器的功率转换功能的PWM控制器; 以及电流检测器异常判定装置，具有异常判定电压指令运算单元，输出用于判定在所述交流电动机中流动的电流的电流检测器的异常的电压指令信号，以及异常判定单元，所述异常判定单元通过所述图案通过将电压指令信号施加到电流转换器而从电流检测器获得的电流。基于外部命令信号和电流检测器的检测信号，PWM控制器将控制信号提供给功率转换器，并且电流检测器异常判定装置在其确定电流检测器具有的情况下输出异常显示交流电机运行前异常。

6. 发明专利

JP2012244747A Power conversion apparatus 有权
标题翻译：功率转换装置
公开(公告)号：JP2012244747A
公开(公告)日：2012-12-10
申请号：JP2011111948
申请日：2011-05-19
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MIWA NAOKI , NAGATA HIROSHI
IPC分类号： H02M7/48 , H02M7/487
摘要： PROBLEM TO BE SOLVED: To provide a power conversion apparatus by which a short-circuit route to which voltage exceeding rated voltage of a fuse is applied is hard to be generated even in a situation that a broken IGBT element of the power conversion apparatus explodes and conductive gas is generated due to dispersion of an internal member.SOLUTION: A power conversion apparatus includes: a plurality of switching elements serially connected between a positive side DC power supply and a bus bar for outputting AC power; a plurality of switching elements serially connected between a negative side DC power supply and the bus bar for outputting the AC power; a diode element connected between a neutral point DC power supply and the switching elements; and an insulation wall for preventing a short-circuit route due to conductive gas near the switching elements. The insulation wall is provided between the switching elements and a fuse, between the switching elements and a diode module, between the switching elements and the bus bar, or among the plurality of switching elements. Otherwise, the insulation wall covers the surroundings of the switching elements.
摘要翻译：解决的问题：即使在功率转换的IGBT元件断裂的情况下，也难以产生施加了超过保险丝的额定电压的电压的短路路径的电力转换装置装置爆炸，并由于内部构件的分散而产生导电气体。解决方案：电力转换装置包括：串联连接在正极直流电源和汇流条之间的多个开关元件，用于输出AC电力; 多个开关元件，串联连接在负侧直流电源和母线之间，用于输出交流电; 连接在中性点直流电源和开关元件之间的二极管元件; 以及用于防止由开关元件附近的导电气体引起的短路路径的绝缘壁。绝缘壁设置在开关元件和开关元件之间的保险丝和开关元件与母线之间或多个开关元件之间的二极管模块之间。否则，绝缘壁覆盖开关元件的周围。版权所有（C）2013，JPO＆INPIT

7. 发明专利

JP2012135087A Motor control device 有权
标题翻译：电机控制装置
公开(公告)号：JP2012135087A
公开(公告)日：2012-07-12
申请号：JP2010283290
申请日：2010-12-20
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KOBAYASHI KENJI , NAGATA HIROSHI
IPC分类号： H02P29/00
摘要： PROBLEM TO BE SOLVED: To provide a speed control technique of an AC motor capable of achieve a stable operation by suppressing speed fluctuation caused by a disturbance load torque.SOLUTION: A motor control device comprises: a speed regulator 101; a torque current regulator 102; a torque current gain part 201 which calculates an estimated torque current based on a torque current command; an acceleration/deceleration current conversion gain part 202 which calculates an estimated acceleration/deceleration current based on a rotational speed detection signal of the AC motor; a disturbance load torque observer gain part 203 which generates an estimated disturbance load torque current command by multiplying an estimated disturbance load torque current obtained by subtracting the estimated acceleration/deceleration torque current from the estimated torque current by filter processing and a conversion gain of a disturbance load torque current command; and a limiter 205 which limits a change limit of an output of the disturbance load torque observer gain part. The motor control device adds the output of the disturbance load torque observer gain part limited by the limiter to the torque command.
摘要翻译：解决的问题：提供能够通过抑制由扰动负载转矩引起的速度波动而能够实现稳定运行的交流电动机的速度控制技术。解决方案：电动机控制装置包括：调速器101; 转矩电流调节器102; 扭矩电流增益部201，其基于转矩电流指令来计算估计转矩电流; 加速/减速电流转换增益部分202，其基于交流电动机的转速检测信号计算估计的加速/减速电流; 扰动负载转矩观察器增益部203，其通过将通过滤波处理从推定转矩电流减去估计出的加速/减速转矩电流而获得的估计干扰负载转矩电流与扰动的转换增益相乘，生成估计的扰动负载转矩电流指令负载转矩电流指令; 限制器205限制了扰动负载转矩观测器增益部分的输出的变化极限。电动机控制装置将限制器限制的扰动负载转矩观测器增益部分的输出与转矩指令相加。版权所有（C）2012，JPO＆INPIT

8. 发明专利

JP2010268680A Power conversion device 有权
标题翻译：电源转换器件
公开(公告)号：JP2010268680A
公开(公告)日：2010-11-25
申请号：JP2010155834
申请日：2010-07-08
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NAGATA HIROSHI , KOBAYASHI KENJI
IPC分类号： H02M1/08 , H02M7/487
摘要： PROBLEM TO BE SOLVED: To reduce the cost of an insulating transformer arranged between a drive circuit driving a power conversion element and a power source for the drive circuit. SOLUTION: A power conversion device 200 includes: main circuit bus lines provided with positive-electrode bus lines P and negative-electrode bus lines N; and a power conversion circuit 101 that converts the direct current power supplied between the main circuit bus lines to the alternate current power to output it to an alternate current output terminal AC. The power conversion circuit includes: positive-electrode side power conversion elements QP and QPC; negative-electrode side power conversion elements QN and QNC; drive circuits DRVP, DRPC, DRVN, and DRVNC that drive the positive-electrode side power conversion elements and negative-electrode side power conversion elements; a drive power circuit DRVS that supplies the driving power to the drive circuit by insulating the driving power via drive circuit insulating transformers TRP1, TRPC1, TRN1, and TRNC1; and a control power source insulating transformer TRSRC. The common potential point BP of the drive power circuit is connected with the main circuit bus lines. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：降低布置在驱动电力转换元件的驱动电路与驱动电路的电源之间的绝缘变压器的成本。电源转换装置200包括：设置有正极母线P和负极母线N的主电路总线; 以及电力转换电路101，其将在主电路总线之间提供的直流电力转换为交流电力，以将其输出到交流输出端子AC。功率转换电路包括：正极侧功率转换元件QP和QPC; 负电极侧功率转换元件QN和QNC; 驱动正极侧电力转换元件和负极侧电力变换元件的驱动电路DRVP，DRPC，DRVN，DRVNC; 驱动电源电路DRVS，其通过驱动电路绝缘变压器TRP1，TRPC1，TRN1和TRNC1绝缘驱动电力来向驱动电路提供驱动电力; 和一个控制电源绝缘变压器TRSRC。驱动电源电路的公共电位点BP与主电路总线连接。版权所有（C）2011，JPO＆INPIT

9. 发明专利

JP2010178542A Power converter 有权
标题翻译：电源转换器
公开(公告)号：JP2010178542A
公开(公告)日：2010-08-12
申请号：JP2009019941
申请日：2009-01-30
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KOBAYASHI KENJI , NAGATA HIROSHI
IPC分类号： H02M7/48 , H02M7/487 , H02M7/5387 , H02P27/06
摘要： PROBLEM TO BE SOLVED: To attain reduction in the leak current that flows into the ground from a power conversion main circuit, by applying resistors for fixing a conductive potential in a power converter. SOLUTION: By electrically connecting the potential of a heat sink (electrically conducting member), wherein an IGBT (semiconductor element) is mounted to a connection between resistors for fixing a conductive potential which are connected to a power conversion DC main circuit, the applied voltage between the ground and the heat sink (conducting member) is reduced, and the leak current that flows into the ground via a floating capacitance can be reduced. COPYRIGHT: (C)2010,JPO&INPIT

10. 发明专利

JP2008086096A Semiconductor power converter 有权
标题翻译：半导体电源转换器
公开(公告)号：JP2008086096A
公开(公告)日：2008-04-10
申请号：JP2006261653
申请日：2006-09-27
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KATO SHUJI , MATSUDA TOSHIHIKO , IKIMI TAKASHI , NAGATA HIROSHI
IPC分类号： H02M1/08
CPC分类号： H03K17/0828 , H02M1/088 , H02M7/487 , H03K17/567 , H03K17/6871
摘要： PROBLEM TO BE SOLVED: To protect an IGBT from overvoltage by supplying a sufficient current to the gate of an IGBT, when overvoltage is applied to the IGBT. SOLUTION: Clamp elements connected in series are connected between the collector and gate of the IGBT 1, and resistors are severally connected to the different connections of the clamp elements connected in series, thereby protecting the IGBT from overvoltage. COPYRIGHT: (C)2008,JPO&INPIT

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