-
公开(公告)号：US11611289B2
公开(公告)日：2023-03-21
申请号：US17378941
申请日：2021-07-19
发明人： Jian Liu , Dong Dong , Rolando Burgos
摘要： Aspects are described for hybrid modular multilevel converters that include half-bridge submodules. In some embodiments, a hybrid modular multilevel converter can include a direct current (DC) bus and an alternating current (AC) node. A first arm of the hybrid modular multilevel converter includes a first submodule chain link and a first arm inductor and a second arm includes a second submodule chain link and a second arm inductor. A capacitor connects between a first side of the first arm and a first side of the second arm.
-
公开(公告)号：US20230026670A1
公开(公告)日：2023-01-26
申请号：US17378941
申请日：2021-07-19
发明人： Jian Liu , Dong Dong , Rolando Burgos
摘要： Aspects are described for hybrid modular multilevel converters that include half-bridge submodules. In some embodiments, a hybrid modular multilevel converter can include a direct current (DC) bus and an alternating current (AC) node. A first arm of the hybrid modular multilevel converter includes a first submodule chain link and a first arm inductor and a second arm includes a second submodule chain link and a second arm inductor. A capacitor connects between a first side of the first arm and a first side of the second arm.
-
公开(公告)号：US11368103B2
公开(公告)日：2022-06-21
申请号：US15931795
申请日：2020-05-14
发明人： Jun Wang , Rolando Burgos , Dushan Boroyevich
摘要： Aspects of hybrid-current-mode switching-cycle control are described. In one embodiment, a peak current mode is selected to control a switching power cell. The switching power cell is in an arm of a phase leg of a modular multilevel converter. The phase leg includes an upper arm and a lower arm, and the switching power cell includes a capacitor and at least one switch. At least one switch control signal switches the switching power cell according to a peak current mode based on at least one arm current boundary crossing identified for the arm.
-
公开(公告)号：US11307266B2
公开(公告)日：2022-04-19
申请号：US17006058
申请日：2020-08-28
发明人： Yuliang Cao , Minh Ngo , Dong Dong , Rolando Burgos
摘要： Various examples of a high frequency, inductor and transformer core loss characterization and measurement method and system for arbitrary waveforms are disclosed herein. A system and method for determining core loss of a magnetic core can include generating a waveform to excite a first test circuit which comprises an excitation circuit, a circuit under test (CUT) comprising the magnetic core, and an inductance circuit having an inductor connected in parallel to the CUT. The method includes measuring a first current, when the first test circuit is excited. The method includes disconnecting the CUT from the first test circuit to form a second test circuit. The method includes generating the waveform to excite the second test circuit, and measuring a second current, when the second test circuit is excited. The power loss for the magnetic core is calculated based on an input voltage and the first and second measured current.
-
公开(公告)号：US11290022B2
公开(公告)日：2022-03-29
申请号：US17008893
申请日：2020-09-01
发明人： Yuliang Cao , Minh Ngo , Ning Yan , Dong Dong , Rolando Burgos
IPC分类号： H02M3/335 , H02M7/5387 , H02M1/00
摘要： Aspects of bidirectional architectures with partial energy processing in resonant direct current (DC)-to-DC converters are described. In one embodiment, an alternating circuit (AC)-to-DC circuit generates an AC voltage from a DC voltage. A voltage of the AC voltage is transformed into a majority AC voltage of a majority power path and at least one minority AC voltage of the minority power paths. The majority AC voltage is rectified into a majority DC voltage and a minority AC voltage is rectified into a minority DC voltage. The majority power path and the minority power path are combined as a combined DC voltage.
-
公开(公告)号：US09966874B2
公开(公告)日：2018-05-08
申请号：US14578651
申请日：2014-12-22
发明人： Jun Wang , Rolando Burgos , Dushan Boroyevich , Bo Wen
CPC分类号： H02M7/483 , H02M2001/0003 , H02M2007/4835
摘要： In a modular multi-level power converter, additional switching states are interleaved between main switching states that control output voltage or waveform. The additional switching states provide current from a DC-link to charge capacitors in respective modules or cells to an offset voltage from which the capacitor voltages are controlled toward a reference voltage during each switching cycle rather than being allowed to build up over a period of an output waveform of variable line frequency, possibly including zero frequency. Since the switching cycle is much shorter than the duration of a line frequency cycle and the capacitor voltages are balanced during each switching cycle, output voltage ripple can be limited as desired with a capacitor of much smaller value and size than would otherwise be required.
-
7.发明申请Power-Cell Switching-Cycle Capacitor Voltage Control for Modular Multi-Level Converters 有权用于模块化多电平转换器的功率单元开关周期电容电压控制公开(公告)号：US20150207434A1
公开(公告)日：2015-07-23
申请号：US14578651
申请日：2014-12-22
发明人： Jun Wang , Rolando Burgos , Dushan Boroyevich , Bo Wen
IPC分类号： H02M7/797
CPC分类号： H02M7/483 , H02M2001/0003 , H02M2007/4835
摘要： In a modular multi-level power converter, additional switching states are interleaved between main switching states that control output voltage or waveform. The additional switching states provide current from a DC-link to charge capacitors in respective modules or cells to an offset voltage from which the capacitor voltages are controlled toward a reference voltage during each switching cycle rather than being allowed to build up over a period of an output waveform of variable line frequency, possibly including zero frequency. Since the switching cycle is much shorter than the duration of a line frequency cycle and the capacitor voltages are balanced during each switching cycle, output voltage ripple can be limited as desired with a capacitor of much smaller value and size than would otherwise be required.
摘要翻译： 在模块化多电平功率转换器中，额外的开关状态在控制输出电压或波形的主开关状态之间交错。 额外的开关状态提供来自DC链路的电流，以将各个模块或单元中的电容器充电到偏移电压，在每个开关周期期间电容器电压从该偏置电压控制到参考电压，而不是允许在 可变线路频率的输出波形，可能包括零频率。 由于开关周期比线路频率周期的持续时间短得多，并且在每个开关周期期间电容器电压平衡，因此可以根据需要以比其它方式要求的更小的值和尺寸的电容器来限制输出电压纹波。
-
公开(公告)号：US12003114B2
公开(公告)日：2024-06-04
申请号：US16913066
申请日：2020-06-26
发明人： Keyao Sun , Jun Wang , Rolando Burgos , Dushan Boroyevich
IPC分类号： H02J50/12 , H02M7/5387
CPC分类号： H02J50/12 , H02M7/5387
摘要： Aspects of an efficient compensation network for reducing reactive power in a wireless power transfer (WPT) system are disclosed. The compensation network comprises a series/series (S/S) constant current (CC) source, a reactive power compensation capacitor, and a constant current (CC)-to-constant voltage (CV) network. In an example, the S/S CC source comprises a first capacitor connected in series with a first inductor on a primary side of a transformer and a second inductor on a secondary side of the transformer. The S/S CC source converts an input voltage signal of the WPT system into a constant alternating current (AC) current signal. In an example, the CC-to-CV network comprises at least a third capacitor and a third inductor. The CC-to-CV network converts the constant AC current signal into a constant AC voltage signal.
-
公开(公告)号：US20240097572A1
公开(公告)日：2024-03-21
申请号：US17932399
申请日：2022-09-15
发明人： Yuliang Cao , Yijie Bai , Vladimir Mitrovic , Boran Fan , Dong Dong , Rolando Burgos
CPC分类号： H02M3/33573 , H02M1/08
摘要： Power systems including converters that exhibit reduced common mode voltage emissions are described. In one example, a power converter system includes an input and an output, a multi-level switch bridge coupled between the input and the output, an input capacitor branch coupled across the input, an output capacitor branch coupled across the output, and a controller configured to generate switching control signals for the multi-level buck-boost switch bridge. The multi-level switch bridge also includes a plurality of inductors in one example. In one case, a quadrangular or quadrangle control mode can be relied upon to switch the multi-level switch bridge, to minimize the ripple in the inductors, achieve zero voltage switching, reduce common mode electromagnetic interference emission by the converter, and for other benefits.
-
公开(公告)号：US20230369969A1
公开(公告)日：2023-11-16
申请号：US17933312
申请日：2022-09-19
发明人： Keyao Sun , Rolando Burgos , Dushan Boroyevich
CPC分类号： H02M3/015 , H02M1/0025 , H02M3/158
摘要： Topologies and configurations of step-down power supplies including unidirectional balancing cells are described. In one example, a step-down power supply includes an input and an output, a string of series-connected capacitors, and a plurality of unidirectional balancing cells coupled to the capacitors in the string of series-connected capacitors. A first balancing can be configured to transfer power, unilaterally, in a first direction among at least two capacitors in the string of series-connected capacitors, and a second balancing cell can be configured to transfer power, unilaterally, in a second direction among at least two capacitors in the string of series-connected capacitors, where the first direction is different than the second direction. The power supply can also include a gate controller for a balancing cell. The gate controller generates switching control signals at a first switching frequency that is decoupled from a resonant frequency of a balancing branch in the balancing cell.
-
-
-
-
-
-
-
-
-
搜索结果
34 条记录 (耗时 0.024 秒)
