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1. 发明授权

US10871769B2 Manufacturing system and manufacturing method 有权
公开(公告)号：US10871769B2
公开(公告)日：2020-12-22
申请号：US15920497
申请日：2018-03-14
申请人： HITACHI, LTD.
发明人： Koichiro Nagata , Akihiro Nakamura , Shuji Soga , Naohito Ikeda , Gen Tsuchida
IPC分类号： G05B19/418
CPC分类号： G05B19/4188 , G05B2219/31001 , G05B2219/41326 , Y02P90/02 , Y02P90/30
摘要： A manufacturing system 10 is configured to include a driving device 4 configured to drive a manufacturing machine 5 in a step pertaining to product manufacture in a predetermined production management system, the driving device 4 driving the manufacturing machine 5 in the step in response to predetermined information obtained related to a state of the step.

2. 发明授权

US12055214B2 Transmission device monitoring system 有权
公开(公告)号：US12055214B2
公开(公告)日：2024-08-06
申请号：US17752420
申请日：2022-05-24
申请人： Hitachi, Ltd.
发明人： Akihiro Nakamura , Koichiro Nagata , Takuma Nishimura
IPC分类号： F16H61/12 , F16H59/14 , F16H59/70 , G01M13/028 , G01R19/00
CPC分类号： F16H61/12 , F16H59/14 , F16H59/70 , G01M13/028 , G01R19/0092 , F16H2059/706 , F16H2061/1208
摘要： Provided is a transmission device monitoring system including: a diagnostic frequency estimation unit that extracts a plurality of diagnostic frequency candidate groups from a frequency region separated by a specific frequency or more using at least current information on a motor, a gear ratio of a transmission device, and the number of stages of the transmission device, and estimates a frequency satisfying a specific relationship from frequencies obtained in the plurality of diagnostic frequency candidate groups as a diagnostic frequency; and an abnormality diagnosis unit that diagnoses abnormality of the transmission device using at least the one diagnostic frequency estimated by the diagnostic frequency estimation unit.

3. 发明授权

US09350284B2 Power conversion device 有权
标题翻译：电源转换装置
公开(公告)号：US09350284B2
公开(公告)日：2016-05-24
申请号：US14355452
申请日：2012-10-22
申请人： Hitachi, Ltd.
发明人： Toshifumi Sakai , Koichiro Nagata , Yoshitaka Iwaji , Motomi Shimada
IPC分类号： H02M7/00 , H02P27/08 , H02P23/04 , H02P21/05 , H02P23/00 , H02P27/06 , H02P9/10
CPC分类号： H02P23/04 , H02P9/102 , H02P21/05 , H02P21/22 , H02P27/06
摘要： In a system for driving an electric motor by an engine generator, there is a possibility that oscillation and d-axis current are increased. In an engine generator system, a power converter (105) controls a generator (104) so that the phase of an oscillating component included in the d-axis current in the rotor magnetic flux direction of the generator (104) advances by 90 degrees or more with respect to the phase of an oscillating component of the identical frequency included in the rotating electric angular frequency of the generator (104), and further using q-axis voltage adjusting device (118) so that the phase of an oscillating component included in the q-axis current advances by 90 degrees or more with respect to the phase of an oscillating component of the identical frequency included in the rotating electric angular frequency of the generator (104).
摘要翻译：在用于通过发动机发电机驱动电动机的系统中，存在振荡和d轴电流增加的可能性。在发动机发电机系统中，功率转换器（105）控制发电机（104），使得包括在发电机（104）的转子磁通方向上的d轴电流中的振荡分量的相位前进90度或更多地涉及包括在发电机（104）的旋转电角频率中的相同频率的振荡分量的相位，并且还使用q轴电压调节装置（118），使得包括在相对于包含在发电机（104）的旋转电角频率中的相同频率的振荡分量的相位，q轴电流前进90度以上。

4. 发明申请

US20140340005A1 Power Conversion Device 有权
标题翻译：电源转换装置
公开(公告)号：US20140340005A1
公开(公告)日：2014-11-20
申请号：US14355452
申请日：2012-10-22
申请人： Hitachi, Ltd.
发明人： Toshifumi Sakai , Koichiro Nagata , Yoshitaka Iwaji , Motomi Shimada
IPC分类号： H02P23/04 , H02P23/00 , H02P27/06
CPC分类号： H02P23/04 , H02P9/102 , H02P21/05 , H02P21/22 , H02P27/06
摘要： In a system for driving an electric motor by an engine generator, there is a possibility that the effects of harmonics and DC voltage fluctuations of a power converter cause shaft oscillation to increase due to a phenomenon in which current pulsations caused by voltage disturbances at a d-axis and a q-axis are strengthened each other and thus oscillation and d-axis current are increased under the effect of interference between the d-axis and the q-axis. In an engine generator system, a power converter (105) controls a generator (104) by regulating the d-axis voltage Vd* by an amount of ΔVd* using d-axis voltage adjusting means (117) so that the phase of an oscillating component included in the d-axis current in the rotor magnetic flux direction of the generator (104) advances by 90 degrees or more with respect to the phase of an oscillating component of the identical frequency included in the rotating electric angular frequency of the generator (104), and further by regulating the q-axis voltage Vq* by an amount of ΔVq* using q-axis voltage adjusting means (118) so that the phase of an oscillating component included in the q-axis current advances by 90 degrees or more with respect to the phase of an oscillating component of the identical frequency included in the rotating electric angular frequency of the generator (104).
摘要翻译：在用于通过发动机发电机驱动电动机的系统中，存在电力转换器的谐波和直流电压波动的影响引起轴振荡的可能性，这是由于由d的电压扰动引起的电流脉动的现象轴和q轴彼此相互增强，因此在d轴和q轴之间的干涉的作用下振荡和d轴电流增加。在发动机发电机系统中，电力转换器（105）通过使用d轴电压调节装置（117）将d轴电压Vd *调节一定量的Dgr; Vd *来控制发电机（104），使得相位包括在发电机（104）的转子磁通方向上的d轴电流中的振荡分量相对于包含在发电机（104）的旋转电角频率中的相同频率的振荡分量的相位前进90度以上发电机（104），并且通过使用q轴电压调节装置（118）将q轴电压Vq *调整为＆Dgr; Vq *的量，使得包括在q轴电流中的振荡分量的相位前进相对于包含在发电机（104）的旋转电角频率中的相同频率的振荡分量的相位相差90度以上。

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