公开(公告)号：US20170343593A1

公开(公告)日：2017-11-30

申请号：US15680623

申请日：2017-08-18

Applicant: SMA SOLAR TECHNOLOGY AG

Inventor： Mario Willenberg ,  Dirk Hermeling ,  Volker Bergs ,  Karl Nesemann

IPC: G01R27/18 ,  G01R31/12 ,  H02S50/00 ,  H02S40/32

CPC classification number: G01R27/18 ,  G01R27/025 ,  G01R31/1263 ,  H02J3/383 ,  H02J3/385 ,  H02S40/32 ,  H02S50/00 ,  Y02E10/563 ,  Y02E10/58

Abstract: An apparatus for determining insulation resistance at a PV generator includes a first unit configured to shift a generator potential at an output terminal of the PV generator, and a second unit. The second unit is configured to determine the insulation resistance by: connecting a measurement voltage to the output terminal of the PV generator, measuring a first current value and a first voltage value at the output terminal of the PV generator before the measurement voltage is connected, measuring a second current value and a second voltage value at the output terminal of the PV generator after the measurement voltage is connected, and determining the insulation resistance of the PV generator based on the measured first and second current values and the measured first and second voltage values. The first and second units are connected in series.

公开(公告)号：US20130272032A1

公开(公告)日：2013-10-17

申请号：US13907088

申请日：2013-05-31

Applicant: SMA Solar Technology AG

Inventor： Jens-Uwe Mueller ,  Torsten Leifert ,  Sebastian Heinze ,  Mario Willenberg

IPC: H02M3/335

CPC classification number: H02M3/33569 ,  H02J1/108 ,  H02J3/383 ,  H02M3/3387 ,  Y02B70/1433 ,  Y02E10/563

Abstract: The disclosure relates to a method for operating a DC/DC voltage converter comprising a first switching bridge with at least two first switches coupled to an input of the DC/DC voltage converter, a second switching bridge with at least two second switches coupled to an output of the DC/DC voltage converter, a transformer and at least one capacitor, wherein the first switching bridge is connected to the second switching bridge via the transformer. The first switches are switched such that a resonant circuit formed by the transformer and the at least one capacitor is operated in resonance, and the second switches are switched at the same clock frequency with a phase shift compared to the first switches, such that the second switches are switched prior to the first switches. The disclosure also relates to a DC/DC voltage converter comprising a control circuit for the first and second switches which is configured to carry out the method, and to a backup power system including such a DC/DC voltage converter.

Abstract translation: 本公开涉及一种用于操作DC / DC电压转换器的方法，其包括具有耦合到DC / DC电压转换器的输入的至少两个第一开关的第一开关桥，具有至少两个第二开关的第二开关桥， DC / DC电压转换器的输出，变压器和至少一个电容器，其中第一开关桥经由变压器连接到第二开关桥。 切换第一开关使得由变压器和至少一个电容器形成的谐振电路以共振方式工作，并且与第一开关相比，以相移相同的时钟频率切换第二开关，使得第二开关 开关在第一个开关之前切换。 本公开还涉及包括用于执行该方法的第一和第二开关的控制电路以及包括这种DC / DC电压转换器的备用电力系统的DC / DC电压转换器。

公开(公告)号：US10197608B2

公开(公告)日：2019-02-05

申请号：US15680623

申请日：2017-08-18

Applicant: SMA SOLAR TECHNOLOGY AG

Inventor： Mario Willenberg ,  Dirk Hermeling ,  Volker Bergs ,  Karl Nesemann

IPC: G01R27/18 ,  G01R27/02 ,  H02J3/38 ,  G01R31/12 ,  H02S50/00 ,  H02S40/32

Abstract: An apparatus for determining insulation resistance at a PV generator includes a first unit configured to shift a generator potential at an output terminal of the PV generator, and a second unit. The second unit is configured to determine the insulation resistance by: connecting a measurement voltage to the output terminal of the PV generator, measuring a first current value and a first voltage value at the output terminal of the PV generator before the measurement voltage is connected, measuring a second current value and a second voltage value at the output terminal of the PV generator after the measurement voltage is connected, and determining the insulation resistance of the PV generator based on the measured first and second current values and the measured first and second voltage values. The first and second units are connected in series.

公开(公告)号：US20160226372A1

公开(公告)日：2016-08-04

申请号：US15010061

申请日：2016-01-29

Applicant: SMA Solar Technology AG

Inventor： Mario Willenberg ,  Raphael Knoke ,  Andreas Falk ,  Robet Stala ,  Marek Rylko ,  Jerzy Maslon ,  Andrzej Mondzik ,  Slawomir Szot ,  Adam Penczek ,  Mitosz Szarek

IPC: H02M1/34 ,  H02M7/04

CPC classification number: H02M1/34 ,  H02M3/1584 ,  H02M7/04 ,  H02M2001/346 ,  Y02B70/1491 ,  Y02E10/56

Abstract: A step-up converter includes a first inductance electrically connecting a first DC voltage input of the step-up converter to a first junction point, a step-up converter switch connecting the first junction point to a second DC voltage input and a second DC voltage output of the step-up converter, a first diode connecting the first junction point to a first DC voltage output of the step-up converter, and a snubber circuit comprising a charging path and a discharging path. The discharging path runs as a series connection of a capacitor and a second diode from the first junction point to the first DC voltage output, and the charging path is connected at its one end to a junction point between the capacitor and the second diode and is arranged such that the capacitor is charged when the step-up converter switch is switched on.

Abstract translation: 升压转换器包括将升压转换器的第一直流电压输入电连接到第一连接点的第一电感，将第一接合点连接到第二直流电压输入的升压转换器开关和第二直流电压 升压转换器的输出，将第一连接点连接到升压转换器的第一直流电压输出的第一二极管和包括充电路径和放电路径的缓冲电路。 放电路径作为从第一连接点到第一直流电压输出的电容器和第二二极管的串联连接，并且充电路径的一端连接到电容器和第二二极管之间的连接点，并且是 布置成使得当升压转换器开关接通时电容器被充电。

公开(公告)号：US09594126B2

公开(公告)日：2017-03-14

申请号：US14607151

申请日：2015-01-28

Applicant: SMA Solar Technology AG

Inventor： Andreas Falk ,  Mario Willenberg

IPC: G01R31/40 ,  G01R19/00 ,  G01R31/02 ,  H02H3/33 ,  H01L31/02 ,  H02S50/10 ,  H02H7/122 ,  H02H7/20

CPC classification number: G01R31/40 ,  G01R31/025 ,  H01L31/02021 ,  H02H3/337 ,  H02H7/122 ,  H02H7/20 ,  H02S50/00 ,  H02S50/10 ,  Y02E10/50

Abstract: For monitoring an inverter that includes separate input-side connectors for multiple direct-current generators with regard to the occurrence of a critical fault current, differential currents in at last two pairs of input lines are measured separately in the inverter. The at last two pairs of input lines conduct the currents that are fed in at different input-side connectors, and all pairs of input lines in their entirety transmit all currents that are fed in at the connectors. The differential currents are compared with a limit value separately for each pair of input lines. A case of the limit value being exceeded is recognized as a fault. In addition, a sum of simultaneously occurring differential currents in all pairs of input lines is determined and the sum is compared with a further limit value, wherein a case of the further limit value being exceeded is also recognized as a fault.

Abstract translation: 为了监测一个逆变器，包括关于发生临界故障电流的多个直流发电机的单独的输入侧连接器，最后两对输入线路中的差分电流在逆变器中单独测量。 最后两对输入线传导在不同输入侧连接器馈送的电流，并且所有输入线对全部传输在连接器处馈送的所有电流。 差分电流与每对输入线分别与极限值进行比较。 超过极限值的情况被认定为故障。 此外，确定所有输入线对中同时出现的差分电流的总和，并将和与另外的限制值进行比较，其中超过另外的限制值的情况也被认为是故障。

公开(公告)号：US20150137850A1

公开(公告)日：2015-05-21

申请号：US14607151

申请日：2015-01-28

Applicant: SMA Solar Technology AG

Inventor： Andreas Falk ,  Mario Willenberg

IPC: G01R31/40 ,  H02H3/33 ,  H02H7/122

CPC classification number: G01R31/40 ,  G01R31/025 ,  H01L31/02021 ,  H02H3/337 ,  H02H7/122 ,  H02H7/20 ,  H02S50/00 ,  H02S50/10 ,  Y02E10/50

Abstract: For monitoring an inverter that includes separate input-side connectors for multiple direct-current generators with regard to the occurrence of a critical fault current, differential currents in at last two pairs of input lines are measured separately in the inverter. The at last two pairs of input lines conduct the currents that are fed in at different input-side connectors, and all pairs of input lines in their entirety transmit all currents that are fed in at the connectors. The differential currents are compared with a limit value separately for each pair of input lines. A case of the limit value being exceeded is recognized as a fault. In addition, a sum of simultaneously occurring differential currents in all pairs of input lines is determined and the sum is compared with a further limit value, wherein a case of the further limit value being exceeded is also recognized as a fault.

Abstract translation: 为了监测一个逆变器，包括关于发生临界故障电流的多个直流发电机的单独的输入侧连接器，最后两对输入线路中的差分电流在逆变器中单独测量。 最后两对输入线传导在不同输入侧连接器馈送的电流，并且所有输入线对全部传输在连接器处馈送的所有电流。 差分电流与每对输入线分别与极限值进行比较。 超过极限值的情况被认定为故障。 此外，确定所有输入线对中同时出现的差分电流的总和，并将和与另外的限制值进行比较，其中超过另外的限制值的情况也被认为是故障。