公开(公告)号：US20210384824A1

公开(公告)日：2021-12-09

申请号：US17410225

申请日：2021-08-24

Applicant: SMA Solar Technology AG

Inventor： Burkard Mueller

IPC: H02M3/155 ,  H02M1/08 ,  H03K5/24

Abstract: A power electronics device has a first power semiconductor switch and a driver circuit and enables a supply of electrical voltage to a driver circuit. An auxiliary circuit arrangement has a supply capacitor, an auxiliary capacitor, a normally off auxiliary semiconductor switch, a diode and a bootstrap diode. The auxiliary semiconductor switch is connected to a reference potential connection of the first power semiconductor switch via a connection point, starting from the connection point, a series connection of the diode, a second connection point and the auxiliary capacitor is arranged in parallel with the auxiliary semiconductor switch. When the auxiliary semiconductor switch is in the off state, the auxiliary capacitor is charged by the flow of current through the first power semiconductor switch.

公开(公告)号：US10530274B2

公开(公告)日：2020-01-07

申请号：US16294065

申请日：2019-03-06

Applicant: SMA Solar Technology AG

Inventor： Burkard Mueller ,  Klaus Rigbers ,  Wilfried Vogt

IPC: H02M7/5387 ,  H02M1/32 ,  H02J3/38

Abstract: A method for operating a transformerless inverter includes operating first and second half-bridges of the inverter using a unipolar clocking method as a first clocking method, determining a value of a grid-frequency stray current at the DC terminals of the inverter during the unipolar clocking method, and when a limit value is exceeded by the stray current value, operating the first and second half-bridges of the inverter using a stray-current-reducing clocking method as a second clocking method in which the first half-bridge provides an AC voltage at the first AC output, wherein an amplitude of the AC voltage is less than 50% of the amplitude of a voltage amplitude of the grid, and the second half-bridge provides a difference voltage between the grid voltage and the voltage provided by the first half-bridge at the first AC output.

公开(公告)号：US20170373593A1

公开(公告)日：2017-12-28

申请号：US15698903

申请日：2017-09-08

Applicant: SMA SOLAR TECHNOLOGY AG

Inventor： Burkard Mueller

IPC: H02M3/156 ,  H02J3/38 ,  H02J7/35 ,  H02M7/42 ,  H02M1/10 ,  H02J7/34

CPC classification number: H02M3/156 ,  H02J3/385 ,  H02J7/345 ,  H02J7/35 ,  H02M1/10 ,  H02M3/155 ,  H02M7/42

Abstract: A DC/DC converter includes a first low-voltage terminal point, a second low-voltage terminal point and a third low-voltage terminal point, and a first high-voltage terminal point and a second high-voltage terminal point. The first low-voltage terminal point and the first high-voltage terminal point are directly connected to one another, and an actively drivable switching element, a capacitor and a further switching element are connected in series between the first high-voltage terminal point and the second high-voltage terminal point. The capacitor is connected between the second low-voltage terminal point and the third low-voltage terminal point, a further capacitance is directly connected between the second low-voltage terminal point and the third low-voltage terminal point, and the further capacitance is decoupled from the capacitor at two terminals by two inductors, respectively.

公开(公告)号：US20150085550A1

公开(公告)日：2015-03-26

申请号：US14492137

申请日：2014-09-22

Applicant: SMA Solar Technology AG

Inventor： Burkard Mueller ,  Jens Friebe ,  Torsten Leifert

IPC: H02M3/158 ,  H02M7/797

CPC classification number: H02M3/158 ,  H02M1/4233 ,  H02M7/538 ,  H02M7/797 ,  Y02B70/126

Abstract: A half-bridge of a bidirectional converter is divided into a first and a second conduction path connected in parallel. In each of the conduction paths a switching element and a freewheeling diode are connected in series, and the center points of the conduction paths are connected via a second inductor. The second inductor is connected in series with a first inductor which is connected to the center point of the second conduction path. The half-bridge has two operating modes. In each of the two operating modes the switching element in one of the two conduction paths is clocked at a high frequency to cause a flow of energy in one of two directions between a pair of high voltage-side connections and a pair of low voltage-side connections to the half-bridge. The two switching elements are of different types, the switching element in the first conduction path causing higher switching losses.

Abstract translation: 双向转换器的半桥被分成并联连接的第一和第二导电路径。 在每个导通路径中，开关元件和续流二极管串联连接，并且导通路径的中心点经由第二电感器连接。 第二电感器与连接到第二导电路径的中心点的第一电感器串联连接。 半桥有两种操作模式。 在两种操作模式中的每一种中，两个传导路径中的一个中的开关元件以高频率计时，以在一对高压侧连接和一对低电压侧连接之间的两个方向中的一个方向上产生能量流， 侧连接到半桥。 两个开关元件是不同类型的，第一导电路径中的开关元件导致较高的开关损耗。

公开(公告)号：US11276786B2

公开(公告)日：2022-03-15

申请号：US16352093

申请日：2019-03-13

Applicant: SMA Solar Technology AG

Inventor： Markus Hopf ,  Burkard Mueller ,  Oliver Prior

IPC: H01L31/00 ,  H01L31/02 ,  H01L31/0443 ,  H02H7/20

Abstract: A solar module includes a safety circuit, and a series circuit of bypass diodes, which is arranged between solar module connections, wherein the bypass diodes have bypass connections at both ends and all connecting points of the series circuit of bypass diodes. The solar module also includes a series circuit of solar partial modules having partial module terminals at both ends and all connecting points of the series circuit of solar partial modules, wherein each bypass diode is associated with precisely one solar partial module, and a plurality of semiconductor switches configured to disconnect the solar module connections from voltage at an associated partial module terminal when a disconnection signal is received by the safety circuit. Each of the plurality of semiconductor switches is configured to switch a solar partial module associated therewith into a voltage-free or current-free state, and at least one bypass connection is directly connected to an associated partial module terminal and at least one bypass connection is connected to an associated partial module terminal by means of one of the semiconductor switches.

公开(公告)号：US20180302030A1

公开(公告)日：2018-10-18

申请号：US16014181

申请日：2018-06-21

Applicant: SMA Solar Technology AG

Inventor： Jens Friebe ,  Burkard Mueller ,  Martin Putz

IPC: H02S50/10 ,  G01R31/44 ,  G01R27/18 ,  G01R31/02 ,  G01R31/42 ,  G01R27/02

Abstract: An inverter including a circuit arrangement configured to measure an insulation resistance is disclosed. The inverter includes at least one half-bridge including at least two switching elements extending between respective end points, and a grid disconnection point comprising a series circuit comprised of two disconnection devices. The series circuit is arranged between a center point of the half-bridge and an AC voltage terminal of the inverter, which AC voltage terminal is configured to connect to a phase conductor or a neutral conductor of an AC voltage grid. The circuit arrangement includes a resistor and a voltage measurement apparatus. The resistor is arranged electrically in parallel with one of the disconnection devices and the voltage measurement apparatus is arranged electrically between the output-side terminal of the resistor and one of the end points of the half-bridge.

公开(公告)号：US20150062982A1

公开(公告)日：2015-03-05

申请号：US14534380

申请日：2014-11-06

Applicant: SMA Solar Technology AG

Inventor： Burkard Mueller ,  Lukas Kasper

IPC: H02M1/08 ,  H02M3/335

CPC classification number: H02M1/08 ,  H02M3/33523 ,  H02M3/33576 ,  H02M2001/0009

Abstract: The disclosure relates to a circuit arrangement for actuating at least one switching element of a voltage converter with a DC-isolating signal transformer that comprises a primary winding and at least one secondary winding, wherein an actuating signal for the switching element can be applied to the primary winding, and the secondary winding is connected to a switching input of the at least one switching element. The circuit arrangement is characterized by the fact that at least a part of the at least one secondary winding is connected in series with a switching path of the switching element in such a way that a switch current flowing through a switching path of the switching element flows through this part, and that a current measurement device is arranged in a series circuit with respect to the primary winding for determining the switch current. The disclosure furthermore relates to a method for actuating a switching element of a voltage converter, to a driver circuit for providing the actuating signal, which driver circuit can be used in connection with the circuit arrangement, and to the use of the circuit arrangement and/or of the method for providing an operating supply voltage to an inverter.

Abstract translation: 本公开涉及一种电路装置，用于使用包括初级绕组和至少一个次级绕组的DC隔离信号变压器致动电压转换器的至少一个开关元件，其中用于开关元件的致动信号可以施加到 初级绕组，并且次级绕组连接到至少一个开关元件的开关输入端。 电路装置的特征在于至少一个次级绕组的至少一部分与开关元件的开关路径串联连接，使得流过开关元件的开关路径的开关电流流过 通过这一部分，电流测量装置相对于初级绕组布置在串联电路中，用于确定开关电流。 本发明还涉及一种用于致动电压转换器的开关元件的方法，用于提供驱动信号的驱动器电路，该驱动电路可以与电路装置结合使用，以及使用电路装置和/ 或用于向逆变器提供工作电源电压的方法。

公开(公告)号：US20140339898A1

公开(公告)日：2014-11-20

申请号：US14277944

申请日：2014-05-15

Applicant: SMA Solar Technology AG

Inventor： Burkard Mueller

IPC: H02J1/00 ,  H02M7/42

CPC classification number: H02J1/00 ,  H02J3/383 ,  H02J7/35 ,  H02J2007/0059 ,  H02M1/10 ,  H02M3/005 ,  H02M3/158 ,  H02M7/42 ,  H02M7/48 ,  H02M2001/007 ,  Y02E10/563 ,  Y02E10/566 ,  Y10T307/50 ,  Y10T307/549

Abstract: A circuitry arrangement includes two-pole connectors for connecting a battery and a further voltage source. The plus pole of one connector and the minus pole of the other connector are directly connected to a plus pole and a minus pole of a DC voltage link. The plus and minus poles of the one connector are connected via a first parallel circuit of a switch and a diode and a first choke connected in series. The minus and plus poles of the other connector are connected via a second parallel circuit of a switch and a diode and a second choke connected in series. A connection between choke ends of the two parallel circuits is electrically conductive at least for alternating currents. The two chokes are magnetically coupled in that their winding senses on a common magnetic core are equal as viewed from the connection between the two parallel circuits.

Abstract translation: 电路装置包括用于连接电池和另外的电压源的两极连接器。 一个连接器的正极和另一个连接器的负极直接连接到直流电压链路的正极和负极。 一个连接器的正极和负极经由开关和二极管的第一并联电路和串联连接的第一扼流圈相连接。 另一个连接器的负极和负极通过开关和二极管的第二并联电路和串联连接的第二扼流圈连接。 至少对于交流电，两个并联电路的扼流端之间的连接是导电的。 两个扼流圈是磁耦合的，因为从两个并联电路之间的连接看，共用磁芯上的绕组感应相等。

公开(公告)号：US12074521B2

公开(公告)日：2024-08-27

申请号：US17886134

申请日：2022-08-11

Applicant: SMA Solar Technology AG

Inventor： Burkard Mueller

IPC: H02M3/158 ,  H02M7/483

CPC classification number: H02M3/158 ,  H02M7/4833

Abstract: A circuit arrangement for balancing a split DC link arranged between a first DC-voltage terminal and a second DC-voltage terminal is disclosed. The first DC-voltage terminal is connected via a first semiconductor switch to a first intermediate point that is connected via a second semiconductor switch to a bridge center point that is connected via a third semiconductor switch to a second intermediate point that is connected via a fourth semiconductor switch to the second DC-voltage terminal. A first terminal of a resonant capacitor is connected to the first intermediate point, and a second terminal of the resonant capacitor is connected to a DC-link center point via a connecting path, in which a resonant inductor is arranged in a series circuit with the third semiconductor switch, and which runs via the second intermediate point. An additional winding is magnetically coupled to the resonant inductor and a first terminal thereof is connected via a first diode to a first terminal of a countervoltage source, and a second terminal thereof is connected to a second terminal of the countervoltage source so that an energy coupled into the additional winding from the resonant inductor is discharged into the countervoltage source.

公开(公告)号：US20190214511A1

公开(公告)日：2019-07-11

申请号：US16352093

申请日：2019-03-13

Applicant: SMA Solar Technology AG

Inventor： Markus Hopf ,  Burkard Mueller ,  Oliver Prior

IPC: H01L31/02 ,  H01L31/0443 ,  H02H7/20

CPC classification number: H01L31/02021 ,  H01L31/0443 ,  H02H7/20 ,  Y02E10/50

Abstract: A solar module includes a safety circuit, and a series circuit of bypass diodes, which is arranged between solar module connections, wherein the bypass diodes have bypass connections at both ends and all connecting points of the series circuit of bypass diodes. The solar module also includes a series circuit of solar partial modules having partial module terminals at both ends and all connecting points of the series circuit of solar partial modules, wherein each bypass diode is associated with precisely one solar partial module, and a plurality of semiconductor switches configured to disconnect the solar module connections from voltage at an associated partial module terminal when a disconnection signal is received by the safety circuit. Each of the plurality of semiconductor switches is configured to switch a solar partial module associated therewith into a voltage-free or current-free state, and at least one bypass connection is directly connected to an associated partial module terminal and at least one bypass connection is connected to an associated partial module terminal by means of one of the semiconductor switches.