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1. 发明授权

US11038436B2 Inverter system 有权
公开(公告)号：US11038436B2
公开(公告)日：2021-06-15
申请号：US16637433
申请日：2018-07-18
申请人： LSIS CO., LTD. , SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION
发明人： Sung-Guk Ahn , Seung-Ki Sul , Hyun-Sam Jung , Jeong-Mock Yoo
IPC分类号： H02M7/487 , H02M7/483 , H01F30/12 , H02M1/12 , H02M7/217 , H02M7/537
摘要： A unit power cell of an inverter system, according to one embodiment of the present invention, comprises: a first leg including first and fourth switching elements, which are connected in series to each other, second and third switching elements, which are connected in series with each other between a connection point of the first and second switching elements and a smoothing unit, and first, second, third and fourth diodes, which are inversely and respectively connected in parallel with the first, second, third and fourth switching elements; and a second leg connected in parallel with the first leg and including fifth and sixth switching elements, which are connected in series to each other, and fifth and sixth diodes, which are inversely and respectively connected in parallel with the fifth and sixth switching elements.

2. 发明授权

US10073485B2 Method for compensating instantaneous power failure in medium voltage inverter and medium voltage inverter system using the same 有权
公开(公告)号：US10073485B2
公开(公告)日：2018-09-11
申请号：US14997982
申请日：2016-01-18
申请人： LSIS CO., LTD.
发明人： Sung-Guk Ahn
IPC分类号： H02J1/10 , H02J3/38 , G05F5/00 , H02M1/32 , H02M7/49 , H02P1/02 , H02P23/07 , H02M7/483
CPC分类号： G05F5/00 , H02M1/32 , H02M7/49 , H02M2001/0096 , H02M2007/4835 , H02P1/029 , H02P23/07 , Y02P80/15
摘要： According to an embodiment, a method for compensating instantaneous power failure includes determining whether an input voltage of a plurality of power cells is less than or equal to a first threshold voltage, decreasing, when the input voltage is less than or equal to the first threshold voltage, an output frequency of the inverter, determining whether a voltage of a direct current (DC) link is greater than or equal to a second threshold voltage, and increasing, when the voltage of the DC link is greater than or equal to the second threshold voltage, the output frequency of the inverter. Overvoltage trip may be prevented at the power restoration time and overcurrent trip caused by increase in the slip frequency may be prevented. Thereby, reliability of a medium inverter may be enhanced, and a continuous operation time increased compared to the conventional cases may be ensured.

3. 发明申请

US20160209862A1 METHOD FOR COMPENSATING INSTANTANEOUS POWER FAILURE IN MEDIUM VOLTAGE INVERTER AND MEDIUM VOLTAGE INVERTER SYSTEM USING THE SAME 审中-公开
标题翻译：用于补偿中等电压逆变器和中等电压逆变器系统中的瞬时电源故障的方法
公开(公告)号：US20160209862A1
公开(公告)日：2016-07-21
申请号：US14997982
申请日：2016-01-18
申请人： LSIS CO., LTD.
发明人： Sung-Guk Ahn
IPC分类号： G05F5/00
CPC分类号： G05F5/00 , H02M1/32 , H02M7/49 , H02M2001/0096 , H02M2007/4835 , H02P1/029 , H02P23/07 , Y02P80/15
摘要： According to an embodiment, a method for compensating instantaneous power failure includes determining whether an input voltage of a plurality of power cells is less than or equal to a first threshold voltage, decreasing, when the input voltage is less than or equal to the first threshold voltage, an output frequency of the inverter, determining whether a voltage of a direct current (DC) link is greater than or equal to a second threshold voltage, and increasing, when the voltage of the DC link is greater than or equal to the second threshold voltage, the output frequency of the inverter. Overvoltage trip may be prevented at the power restoration time and overcurrent trip caused by increase in the slip frequency may be prevented. Thereby, reliability of a medium inverter may be enhanced, and a continuous operation time increased compared to the conventional cases may be ensured.
摘要翻译：根据实施例，用于补偿瞬时停电的方法包括确定多个功率单元的输入电压是否小于或等于第一阈值电压，当输入电压小于或等于第一阈值时，电压，逆变器的输出频率，确定直流（DC）链路的电压是否大于或等于第二阈值电压，并且当直流链路的电压大于或等于第二阈值电压时，阈值电压，变频器的输出频率。可以在电力恢复时间防止过电压跳闸，并且可以防止由滑差频率增加引起的过电流跳闸。因此，可以提高中等逆变器的可靠性，并且可以确保与常规情况相比增加的连续操作时间。

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