Patents by Inventor Roland Huempfner
Roland Huempfner has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240039408Abstract: The technology of this application relates to a partial power converter that is configured to be connected to at least one photovoltaic panel as inputs and a direct current output bus, the at least one photovoltaic panel generating a direct current. The partial power converter includes a photovoltaic-side converter comprising at least two switching cells, a bus-side converter comprising at least two switching cells, the bus-side converter being configured to switch a total current of the photovoltaic-side converter, an energy storage element connected between the photovoltaic-side converter and the bus-side converter, and an indirect voltage source configured to regulate the energy storage element. The photovoltaic-side converter, the bus-side converter and the energy storage element are connected in parallel between the first node and the second node of the partial power converter.Type: ApplicationFiled: October 11, 2023Publication date: February 1, 2024Inventors: Yong Dae KWON, Piniwan Thiwanka Bandara WIJEKOON, Francisco Daniel FREIJEDO FERNÁNDEZ, Emanuel VALLARELLA, Roland HUEMPFNER
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Publication number: 20230418348Abstract: A power supply system includes one or more solid state transformers (SST), one or more first stage DC-DC converters and one or more second stage DC-DC converters. The one or more solid state transformers (SST) are configured to convert any medium-voltage Alternating Current (MVAC) input or medium-voltage Direct Current (MVDC) input to a first low-voltage Direct-Current (LVDC) output. The one or more first stage DC-DC converters are configured to convert the first low-voltage DC output to a second LVDC output. The one or more second stage DC-DC converters are configured to convert the second LVDC output to a third LVDC output. The third LVDC output is used to supply power to one or more servers in a data centre ICT load area.Type: ApplicationFiled: September 8, 2023Publication date: December 28, 2023Inventors: Andreas Stiedl, Roland Huempfner
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Patent number: 11652408Abstract: A DC/DC power converter comprises three or more capacitors connected in series between an output terminal and a ground terminal, the three or more capacitors being connected in series by means of two or more capacitor connection points, and an input voltage switching unit configured to connect an input terminal to one of a group of switching connection points, the group of switching connection points comprising the two or more capacitor connection points and the output terminal. With such a DC/DC power converter it is possible, for example, to convert a variable DC voltage at the input into a variable DC voltage at the output, wherein the voltage range of the output voltage is smaller than the voltage range of the input voltage.Type: GrantFiled: April 7, 2022Date of Patent: May 16, 2023Assignee: Huawei Digital Power Technologies Co., Ltd.Inventors: Petar Grbovic, Roland Huempfner, Jose Antonio Cobos, Pedro Alou, Jesus Angel Oliver, Miroslav Vasic
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Publication number: 20230046346Abstract: Embodiments of this application provide a power system. An output terminal of a power supply or a DC-to-DC unit is cascaded. In addition, according to the power system provided in embodiments of this application, a quantity of cables from the power supply or the DC-to-DC unit to the DC-to-AC unit may be further reduced by cascading an output terminal of the power supply or the DC-to-DC unit and cascading an input of the DC-to-AC unit.Type: ApplicationFiled: October 14, 2022Publication date: February 16, 2023Inventors: Yanzhong Zhang, Yongbing Gao, Xun Wang, Roland Huempfner
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Publication number: 20220302831Abstract: A DC/DC power converter comprises three or more capacitors connected in series between an output terminal and a ground terminal, the three or more capacitors being connected in series by means of two or more capacitor connection points, and an input voltage switching unit configured to connect an input terminal to one of a group of switching connection points, the group of switching connection points comprising the two or more capacitor connection points and the output terminal. With such a DC/DC power converter it is possible, for example, to convert a variable DC voltage at the input into a variable DC voltage at the output, wherein the voltage range of the output voltage is smaller than the voltage range of the input voltage.Type: ApplicationFiled: April 7, 2022Publication date: September 22, 2022Inventors: Petar GRBOVIC, Roland HUEMPFNER, Jose Antonio COBOS, Pedro ALOU, Jesus Angel OLIVER, Miroslav VASIC
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Publication number: 20220200290Abstract: A power system is disclosed. Output terminals of a power supply or a DC-to-DC unit are cascaded to increase an output voltage, so as to reduce a current between the power supply or the DC-to-DC unit and the DC-to-AC unit, and resolve cost and loss problems of the cable from the power supply or the DC-to-DC unit to the DC-to-AC unit. In addition, according to the power system provided in the embodiments of this application, a quantity of cables from the power supply or the DC-to-DC unit to the DC-to-AC unit may be further reduced by cascading output terminals of the power supply or the DC-to-DC unit and cascading inputs of the DC-to-AC unit, thereby reducing system costs. In addition, in the power system provided in the embodiments of this application, cascaded input and isolated output of the DC-to-AC unit can reduce a specification of a power conversion device.Type: ApplicationFiled: March 14, 2022Publication date: June 23, 2022Inventors: Yanzhong ZHANG, Yongbing GAO, Xun WANG, Roland HUEMPFNER
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Patent number: 11316426Abstract: A DC/DC power converter comprises three or more capacitors connected in series between an output terminal and a ground terminal, the three or more capacitors being connected in series by means of two or more capacitor connection points, and an input voltage switching unit configured to connect an input terminal to one of a group of switching connection points, the group of switching connection points comprising the two or more capacitor connection points and the output terminal. With such a DC/DC power converter it is possible, for example, to convert a variable DC voltage at the input into a variable DC voltage at the output, wherein the voltage range of the output voltage is smaller than the voltage range of the input voltage.Type: GrantFiled: July 21, 2020Date of Patent: April 26, 2022Assignee: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.Inventors: Petar Grbovic, Roland Huempfner, Jose Antonio Cobos, Pedro Alou, Jesus Angel Oliver, Miroslav Vasic
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Patent number: 11217999Abstract: Voltage in the photovoltaic power generation system can be increased under a same power conversion condition, to reduce a current in the photovoltaic power generation system, thereby reducing energy consumption and reducing costs of the photovoltaic power generation system. The system includes: a photovoltaic array, a direct current conversion unit, a bus unit, and an inverter unit, where there are one or more photovoltaic arrays; the photovoltaic array is configured to: convert solar energy into electric energy, in other words, generate direct current power, and output a direct current voltage. The bus unit stores direct current electric energy output by the direct current conversion unit or directly stores the direct current electric energy output by the photovoltaic array, to increase a bus voltage in the first bus unit.Type: GrantFiled: December 7, 2020Date of Patent: January 4, 2022Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Yanzhong Zhang, Xun Wang, Roland Huempfner
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Patent number: 11011990Abstract: A DC/DC power converter has an input terminal, an output terminal, and a ground terminal. The DC/DC power converter includes two capacitors connected in series between the output terminal and the ground terminal, a boost converter having a first boost converter terminal connected to the input terminal, a second boost converter terminal connected to the output terminal, and a third boost converter terminal connected to a connection point between the capacitors, and a step-up converter having a first step-up converter terminal connected to the ground terminal, a second step-up converter terminal connected to the output terminal, and a third step-up converter terminal connected to the connection point.Type: GrantFiled: July 22, 2020Date of Patent: May 18, 2021Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Petar Grbovic, Roland Huempfner, Jose Antonio Cobos, Pedro Alou, Jesus Angel Oliver, Miroslav Vasic
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Publication number: 20210091571Abstract: Voltage in the photovoltaic power generation system can be increased under a same power conversion condition, to reduce a current in the photovoltaic power generation system, thereby reducing energy consumption and reducing costs of the photovoltaic power generation system. The system includes: a photovoltaic array, a direct current conversion unit, a bus unit, and an inverter unit, where there are one or more photovoltaic arrays; the photovoltaic array is configured to: convert solar energy into electric energy, in other words, generate direct current power, and output a direct current voltage. The bus unit stores direct current electric energy output by the direct current conversion unit or directly stores the direct current electric energy output by the photovoltaic array, to increase a bus voltage in the first bus unit.Type: ApplicationFiled: December 7, 2020Publication date: March 25, 2021Inventors: Yanzhong Zhang, Xun Wang, Roland Huempfner
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Publication number: 20200412239Abstract: A DC/DC power converter comprises three or more capacitors connected in series between an output terminal and a ground terminal, the three or more capacitors being connected in series by means of two or more capacitor connection points, and an input voltage switching unit configured to connect an input terminal to one of a group of switching connection points, the group of switching connection points comprising the two or more capacitor connection points and the output terminal. With such a DC/DC power converter it is possible, for example, to convert a variable DC voltage at the input into a variable DC voltage at the output, wherein the voltage range of the output voltage is smaller than the voltage range of the input voltage.Type: ApplicationFiled: July 21, 2020Publication date: December 31, 2020Inventors: Petar GRBOVIC, Roland HUEMPFNER, Jose Antonio COBOS, Pedro ALOU, Jesus Angel OLIVER, Miroslav VASIC
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Publication number: 20200350820Abstract: A DC/DC power converter has an input terminal, an output terminal, and a ground terminal. The DC/DC power converter comprises two capacitors connected in series between the output terminal and the ground terminal, a boost converter having a first boost converter terminal connected to the input terminal, a second boost converter terminal connected to the output terminal, and a third boost converter terminal connected to a connection point between the capacitors, and a step-up converter having a first step-up converter terminal connected to the ground terminal, a second step-up converter terminal connected to the output terminal, and a third step-up converter terminal connected to the connection point.Type: ApplicationFiled: July 22, 2020Publication date: November 5, 2020Inventors: Petar Grbovic, Roland Huempfner, Jose Antonio Cobos, Pedro Alou, Jesus Angel Oliver, Miroslav Vasic