-
公开(公告)号：US20240021358A1
公开(公告)日：2024-01-18
申请号：US18037518
申请日：2021-05-06
发明人： Guoqing Cai , Jiacai Zhuang , Jun Xu , Wei Liu
CPC分类号： H01F27/306 , H01F27/24 , H01F27/29
摘要： The present invention provides a transformer, which is applied to the technical field of power transmission and distribution, the transformer comprising an iron core, body windings, and a semi-conductive layer, the body windings being sleeved on a core post of the iron core, and the semi-conductive layer being correspondingly provided with the body windings. Auxiliary circuits are connected to the body windings, the auxiliary circuits and preset positions of the body windings have equal potentials, and an equipotential connection point of the semi-conductive layer is provided by the auxiliary circuits. After the semi-conductive layer is connected to the auxiliary circuits, the effect of balancing the electric field distribution of a winding can be achieved. In the transformer provided in the present invention, an equipotential connection point having an equal potential with the preset positions of the body windings of the transformer is provided by means of the auxiliary circuits, and the semi-conductive layer is directly connected to the equipotential connection point, thereby achieving set effects of the semi-conductive layer, that is, improving the electric field distribution of windings, and improving the high-voltage insulation performance of the transformer without damaging the insulation between litz wire strands.
-
公开(公告)号：US11671015B2
公开(公告)日：2023-06-06
申请号：US17040512
申请日：2019-12-30
发明人： Tengfei Wang , Jiacai Zhuang , Jun Xu , Nianan Pan
CPC分类号： H02M3/1584 , H02M1/322 , H02M3/1552
摘要： A three-level Boost circuit is provided. The three-level Boost circuit includes: an input capacitor, an inductor, a first switch, a second switch, a first freewheeling diode, a second freewheeling diode, a flying capacitor, a balance capacitor, a charging diode, a clamp diode, a discharging diode and an output series capacitor bank. The output series capacitor bank includes multiple output capacitors connected in series, and has a first node and a second node; a potential of the first node is higher than a potential of a cathode of the charging diode, and a potential difference between a cathode of the second freewheeling diode and the second node does not exceed a withstand voltage of the second freewheeling diode.
-
3.发明授权公开(公告)号：US11239746B2
公开(公告)日：2022-02-01
申请号：US16783310
申请日：2020-02-06
发明人： Tao Zhao , Fushuai Zhuang , Xinyu Wang , Jiacai Zhuang , Mingda Wang , Yuan Zhuang
摘要： A two-stage converter, a method for starting the two-stage converter, an LLC converter, and an application system are provided. A controller of the LLC converter of the two-stage converter first controls a main circuit of the LLC converter to perform hiccup charging on a direct current bus of a later-stage converter at a preset interval, so that the direct current bus voltage of the later-stage converter gradually increases, until an auxiliary power supply of the later-stage converter starts to operate, to supply power to the controller of the later-stage converter. After the controller of the later-stage converter reports the detected direct current bus voltage, the controller of the LLC converter determines whether the output voltage of the LLC converter increases to a hiccup starting voltage. If so, the controller of the LLC converter controls the main circuit to operate in a hiccup voltage stabilization phase.
-
公开(公告)号：US11165345B2
公开(公告)日：2021-11-02
申请号：US16537056
申请日：2019-08-09
发明人： Jiacai Zhuang , Jun Xu , Bing Zhang , Peng Wang , Peng Wen
摘要： A multi-level boost apparatus. Voltage allocation among N first switches is achieved by connecting N voltage dividing modules, sequentially connected in series, in parallel with the N first voltage switches, respectively. Thereby, a voltage across each of the N first switches is within a safety range. Even if an input voltage is high and a voltage across a flying capacitor is zero at an instant of being powered, it is prevented that a second one to an N-th one of the N first switches break down due to overvoltage.
-
公开(公告)号：US10355618B2
公开(公告)日：2019-07-16
申请号：US15950666
申请日：2018-04-11
发明人： Jiacai Zhuang , Yuqing Cui , Deyong Zhao , Xiaohui Luo , Chaoxuan Zhang , Jun Xu , Yilei Gu , Xinyu Wang
摘要： An ANPC inverter, a zero-crossing switching method and a zero-crossing switching apparatus of the ANPC inverter are provided. The method includes: controlling switch states of switch devices in a bridge leg to change according to a preset logic when zero-crossing switching occurs in an output voltage instruction of the bridge leg, so as to prevent overvoltage in the switch device in the bridge leg. The preset logic includes switching among a sequence of switch state combinations. Switch state combinations of the switch devices before and after the zero-crossing switching occurs are defined as the first and second switch state combinations of the sequence. The second to the penultimate switch state combinations are all safe switch state combinations selected in advance, in each of which a maximum voltage borne by the switch devices in the bridge leg is clamped to a safe limit value.
-
公开(公告)号：US12113356B2
公开(公告)日：2024-10-08
申请号：US17703742
申请日：2022-03-24
发明人： Jiacai Zhuang , Wei Liu , Jun Xu
CPC分类号： H02J1/106 , H02J1/12 , H02S40/30 , H02J2300/24
摘要： A photovoltaic power generation system and a method for controlling power balance are provided. The system includes at least two photovoltaic arrays, at least one power balance circuit and a power converter. Each of input ports of the power balance circuit is connected with at least one photovoltaic array, and an output port of the power balance circuit is connected with the power converter. The power balance circuit performs power transfer based on a difference between output powers of the two photovoltaic arrays to control a difference between powers of two output terminals of the power balance circuit to be within a preset range.
-
7.发明公开公开(公告)号：US20240313639A1
公开(公告)日：2024-09-19
申请号：US18576332
申请日：2022-06-10
发明人： Yuan Zhuang , Yuquing Cui , Fushuai Zhuang , Jiacai Zhuang , Jun Xu
摘要： An energy conversion system, and a method and a device for controlling the energy conversion system at an overtemperature are provided. The energy conversion system includes at least one power conversion circuit each including at least two power modules that are cascaded. Respective operating temperatures of all the power modules are measured in real time, to determine the overheated power module that is operating at an overtemperature and the underheated power module that is operating at a normal temperature. Once an overheated power module is detected, a decreased power and a power difference for the overheated power module are acquired, and an increased power for the underheated power module is determined based on the power difference. The operating power of the overheated power module is decreased at the module level with the total operating power of the system remains constant or approximately constant.
-
公开(公告)号：US12095350B2
公开(公告)日：2024-09-17
申请号：US18010435
申请日：2021-05-21
发明人： Yue Dong , Jiacai Zhuang , Jun Xu
CPC分类号： H02M1/007 , H02M1/0074 , H02M1/081 , H02M3/33576 , H02M7/217 , H02M7/483 , H02M7/49
摘要： A cascaded power electronic transformer and a method for controlling the same are provided. The method includes: calculating electrical angles θi1 and θkps of an sth transformer and a compensation electrical angle θj of a jth transformer; adding the compensation electrical angle θj to the electrical angle θkps of the jth transformer, to obtain a compensated electrical angle θkps of the jth transformer; and calculating a square wave of a bridge arm voltage of each of the m primary converters and the r secondary converters of the sth transformer based on the electrical angle θi1 and the electrical angle θkps of the sth transformer after compensation.
-
公开(公告)号：US12021456B2
公开(公告)日：2024-06-25
申请号：US17694767
申请日：2022-03-15
发明人： Jiacai Zhuang , Jun Xu , Hanyu Wang
CPC分类号： H02M3/33584 , H02M1/0009 , H02M3/01 , H02M3/33573
摘要： An isolated bidirectional converter and a method for controlling the same are provided. A primary winding or a secondary winding of a transformer module in the isolated bidirectional converter is connected in parallel with a first branch includes a first inductor and a first current sensor that are connected in series. A current flowing through the first inductor is acquired by the first current sensor, and is proportional to a current flowing through a magnetizing inductor of the winding. Therefore, the current is controlled by modifying a duty cycle of a switch transistor on a bridge arm in the circuit, so that a direct current component of a current flowing through the winding is modified indirectly, thereby avoiding magnetic bias on the magnetizing inductor of the transformer module, and preventing the transformer module from being saturated.
-
公开(公告)号：US11283354B2
公开(公告)日：2022-03-22
申请号：US16538725
申请日：2019-08-12
发明人： Jiacai Zhuang , Jun Xu , Bing Zhang , Peng Wang , Peng Wen
摘要： A multi-level boost apparatus. Voltage allocation among N first switches is achieved by arranging the N voltage dividing modules. It is prevented that the second one to the N-th one of the first switches break down and fail due to overvoltage. By arranging an (i−1)-th clamp branch at a common node between an (i−1)-th second switch and an i-th second switch, a voltage bore by the i-th second switch is clamped at a difference between a voltage across the fourth branch (namely, an output voltage of the multi-level boost apparatus) and a voltage across the corresponding clamp branch. The risk is avoided that a second one to the N-th one of the second switches break down due to overvoltage at an instant of being powered, in a case that the input voltage is low.
-
-
-
-
-
-
-
-
-
搜索结果
22 条记录 (耗时 0.035 秒)
