-
1.发明公开公开(公告)号：US20240356457A1
公开(公告)日：2024-10-24
申请号：US18267784
申请日：2022-10-14
申请人： SOUTHEAST UNIVERSITY
发明人： Zheng WANG , Yang XU , Yinzhen SHEN
摘要： A generator system includes a permanent magnet synchronous generator, a high-frequency matrix converter, a center-tapped high-frequency transformer and a full-bridge converter. An output port of the permanent magnet synchronous generator is connected to a three-phase input of the high-frequency matrix converter. Positive and negative output poles of the high-frequency matrix converter are connected to a primary side of the center-tapped high-frequency transformer. The primary side of the high-frequency transformer is connected to a center tap and then connected to the middle pole of the center-tapped high-frequency matrix converter, and the secondary side of the center-tapped high-frequency transformer is connected to the midpoint of the bridge arms of the full-bridge converter. A midpoint of the input bridge arm of the full-bridge converter is connected to the secondary side of the center-tapped high-frequency transformer, and an output side of the full-bridge converter is connected with a DC load.
-
公开(公告)号：US20240235443A1
公开(公告)日：2024-07-11
申请号：US18152372
申请日：2023-01-10
申请人： CATERPILLAR INC.
摘要： A method of operating a generator set is disclosed. The method includes generating a current using a generator set, and stepping down the generated current to a stepped down current, using an internal current transformer. The method includes measuring the stepped down current using a current meter that may generate a current signal representative of the stepped down current. Further, the method includes generating a root-mean-square (RMS) value using a plurality of current values associated with the current signal. The method also includes generating a modified RMS value, using the current values that are greater than a predetermined current value. The method includes determining a measured value of the current generated by the generator set based on the RMS value and the modified RMS value. In addition, the method includes adjusting an operation of the generator set when the measured value exceeds an over-current threshold.
-
公开(公告)号：US20240235322A1
公开(公告)日：2024-07-11
申请号：US18356024
申请日：2023-07-20
发明人： Donald James ASHLEY
摘要： Flywheel based electrical energy management system and device. The device will often comprise at least one shaft mounted flywheel, each flywheel comprising a flywheel mass that contains a plurality of permanent magnets. The flywheel spins within at least one stator comprising a plurality of magnetic pickup coils configured so that the flywheel mass can rotate freely within the stator. The flywheel may be placed in a vacuum chamber and be supported by magnetic bearings. The flywheel shaft(s) are typically connected to one or more axial mounted motor generators, and the system further typically comprises a storage battery and control processor. The system handles a variety of different and not always stable input power sources, and converts this to continuous, efficient and stable electrical power. The system can handle a variety of clients, such as buildings, electric vehicles, and the like, and can operate under a variety of challenging conditions.
-
公开(公告)号：US20240183335A1
公开(公告)日：2024-06-06
申请号：US18553450
申请日：2022-03-14
发明人： Kouroush NAYEBI , Søren KAPPELGAARD
CPC分类号： F03D7/028 , F03D7/0264 , F03D7/042 , H02P9/02 , F05B2270/1074
摘要： The invention relates to wind turbines, particularly to controlling a wind turbine during a communication loss between the wind turbine and the power plant controller. In case of communication loss, the wind turbine enters a fallback operation mode, wherein the wind turbine is ramping the power production of the wind turbine to a predefined fallback set point.
-
公开(公告)号：US11979106B2
公开(公告)日：2024-05-07
申请号：US17941576
申请日：2022-09-09
发明人： Gilles Bergot
摘要： The disclosure relates to an autonomous device for tracking the usage time of a generator set, capable of providing an operating time of the generator set. The module includes at least one first sensor (101) capable of measuring a first parameter representing a state of operation of said generator set (9), a data processor furnishing the characteristic information for an operating time, as a function of the first parameter, storage of the characteristic information for an operating time, and a transmitter capable of transmitting the characteristic information for an operating time to a terminal or an external server.
-
公开(公告)号：US20240079978A1
公开(公告)日：2024-03-07
申请号：US18506631
申请日：2023-11-10
摘要： The invention relates to a method for controlling a power generating unit. The method includes determining a virtual impedance value, determining a virtual grid power based on the virtual resistance value and the grid current, determining a virtual synchronous machine rotational speed and/or a synchronous machine angle of a virtual synchronous generator, and determining a voltage reference for controlling a line side converter to generate the desired reactive power based on the virtual synchronous machine rotational speed or angle, a virtual voltage and the voltage magnitude reference.
-
公开(公告)号：US20230402954A1
公开(公告)日：2023-12-14
申请号：US17986343
申请日：2022-11-14
IPC分类号： H02P29/024 , H02M1/00 , H02M7/04 , H02P9/02
CPC分类号： H02P29/024 , H02M1/0009 , H02M7/04 , H02P9/02
摘要： A system includes a generator. Three AC feeders are connected for feeding AC output from the generator. A rectifier is electrically connected to the three AC feeders and to a load via a first DC feeder and a second DC feeder. A first resistor connects between a the first DC feeder and ground. A second resistor connects between the second DC feeder and ground. At least one of a first current sensor is operatively connected to detect current in the first DC feeder and/or a second current sensor is operatively connected to detect current in the second DC feeder. A controller is configured to monitor for changes in common mode current based on the input from the at least one current sensor, and to determine presence of a fault if change in the common mode current exceeds a predetermined threshold.
-
公开(公告)号：US20230268856A1
公开(公告)日：2023-08-24
申请号：US17803124
申请日：2022-02-22
申请人： Steven Mark Jones
发明人： Steven Mark Jones
CPC分类号： H02P9/02 , F02B63/042 , F02D29/06 , F02D2200/101
摘要： The invention was conceived to facilitate in the advancement in internal combustion engine driven generators. Generators today consist of either an inverter generator design or a synchronous alternator design. Both designs have their advantages and disadvantages. The inverter generator offers very precise AC power output, lower noise level, and lower fuel consumption rates but can’t handle heavy inductive loads well. The synchronous alternator offers slightly less precise AC power output, greater noise level, higher fuel consumption rates but can power heavy inductive loads very well.
The invention incorporates both, known inverter generator design and known synchronous alternator design, connected to an internal combustion engine, to form a hybrid generator design. The hybrid dual generator/alternator design makes it possible for the invention to capitalize on all the advantages of both inverter generator and synchronous alternator designs, while eliminating all the disadvantages of both inverter generator and synchronous alternator designs.-
公开(公告)号：US11728741B2
公开(公告)日：2023-08-15
申请号：US17278161
申请日：2019-09-19
发明人： Ciprian Biris , Kent Tange , Duy Duc Doan , Gert Karmisholt Andersen , Torsten Lund , Lars Meyer
CPC分类号： H02M5/42 , F03D9/25 , H02M1/44 , H02P9/02 , F05B2220/706
摘要： This invention concerns a method of controlling a power converter system 26 operating in an overmodulation region. The power converter system 26 comprises more than two current controllers 71, 73, 77, 79 a modulator 76 and a power converter 78, and the modulator 76 is configured to provide at least one modulated drive signal 87 to the power converter 78 based on voltage reference vector signals 82a, 82b, 82c, 82d from the more than two current controllers 71, 73, 77, 79. The method comprises determining the voltage reference vector signals 82a, 82b, 82c, 82d; determining compensated voltage reference vector signals 84a, 84b, 84c, 84d indicative of a fundamental frequency of a respective voltage reference vector signal 82a, 82b, 82c, 82d; and, determining the at least one modulated drive signal 87 based on a combination of the compensated voltage reference vector signals 84a, 84b, 84c, 84d.
-
公开(公告)号：US20230178981A1
公开(公告)日：2023-06-08
申请号：US17927673
申请日：2020-11-18
发明人： Hongtao Liao , Wei Wang , Qingmin Qin , Zhe Chen , Qiang Fu
CPC分类号： H02J1/106 , B61C3/02 , B61C17/06 , H02J7/00712 , H02J7/1446 , H02P9/02 , B60L50/61 , H02J2310/48 , H02P2101/40
摘要： A hybrid power locomotive and an energy balance control method and system thereof is disclosed. In embodiments of the disclosure, the energy utilization rate is maximized by means of self-adaptive matching of the rotating speed and the power, dynamic balance control over the actual output voltage of the power pack is achieved by means of charging and discharging control over the energy storage element, and energy waste and power pack overload are avoided.
-
-
-
-
-
-
-
-
-
搜索结果
657 条记录 (耗时 0.021 秒)
