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51. 发明申请

US20150270049A1 MAGNETIC ELEMENT AND CORE THEREOF 审中-公开
标题翻译：磁性元件及其核心
公开(公告)号：US20150270049A1
公开(公告)日：2015-09-24
申请号：US14661939
申请日：2015-03-18
申请人： Delta Electronics (Shanghai) Co., Ltd.
发明人： Zengyi Lu , Shaohua Zhu , Weilong Xia , Jinfa Zhang
IPC分类号： H01F27/24
CPC分类号： H01F27/263 , H01F3/14 , H01F27/306
摘要： The present application discloses a magnetic element comprising two opposed cores, a conductive winding disposed therebetween, and gaps comprised between said two cores; at least one of the two cores comprising a plurality of joint faces and a plurality of bosses, the joint faces being adapted for jointing the opposed core, and the plurality of bosses being disposed on the joint faces to provide a mechanical support for the opposed core, wherein the bosses have a height dimension which is used for substantially controlling the sizes of the gaps. According to the present application, bosses are disposed on the joint faces of a core so that gaps are dispersed over all the magnetic columns of the core, thereby effectively reducing a range of inductance tolerance and improving the consistency of the magnetic element.
摘要翻译：本申请公开了一种磁性元件，包括两个相对的芯，设置在它们之间的导电绕组和在所述两个芯之间的间隙; 所述两个芯中的至少一个包括多个接合面和多个凸起，所述接合面适于接合所述相对的芯，并且所述多个凸起设置在所述接合面上以为所述相对的芯提供机械支撑其中所述凸台具有用于基本上控制所述间隙的尺寸的高度尺寸。根据本申请，将凸台设置在芯的接合面上，使得间隙分散在芯的所有磁柱上，从而有效地减小电感容限的范围并提高磁性元件的一致性。

52. 外观设计

USD1005953S1 Magnetic core 有权
公开(公告)号：USD1005953S1
公开(公告)日：2023-11-28
申请号：US29769321
申请日：2021-02-04
申请人： Delta Electronics (Shanghai) CO., LTD
设计人： Haibin Song , Qi Fu , Daofei Xu , Jinfa Zhang
摘要： FIG. 1 is a front view of the new design;
FIG. 2 is a back view thereof;
FIG. 3 is a left view thereof;
FIG. 4 is a right view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a bottom view thereof; and,
FIG. 7 is a perspective view thereof.
The broken lines in the drawings depict portions of the magnetic core that form no part of the claimed design.

53. 发明授权

US11824456B2 Hybrid flyback circuit and control method 有权
公开(公告)号：US11824456B2
公开(公告)日：2023-11-21
申请号：US17573480
申请日：2022-01-11
申请人： Delta Electronics (Shanghai) Co., Ltd.
发明人： Haibin Song , Hairui Xu , Fengkai Jiang , Daofei Xu , Jinfa Zhang
IPC分类号： H02M3/335 , H02M3/00 , H02M1/00 , H02M1/08 , H02M1/38
CPC分类号： H02M3/33571 , H02M1/0009 , H02M1/0095 , H02M1/083 , H02M1/38 , H02M3/01 , H02M3/33507 , H02M3/33523 , H02M3/33592
摘要： A hybrid flyback circuit is provided and includes an upper switch, a lower switch, a transformer, a resonant circuit, a current sampling circuit and a control unit. The control unit includes an output voltage feedback unit, a peak current comparison unit controlling the upper switch to turn off when a sampling voltage corresponding to the current sampling signal is equal to the first voltage feedback signal, a first dead time delay unit controlling the lower switch to turn on after a first dead time starting from the turn-off time of the upper switch, a negative peak current feedback unit for generating a second voltage feedback signal, a conduction control unit controlling the lower switch to turn off, and a second dead time delay unit controlling the upper switch to turn on after a second dead time starting from the turn-off time of the lower switch.

54. 发明授权

US11777397B2 Multilevel conversion circuit having flying capacitor 有权
公开(公告)号：US11777397B2
公开(公告)日：2023-10-03
申请号：US17810642
申请日：2022-07-05
申请人： Delta Electronics (Shanghai) Co.,Ltd.
发明人： Kai Dong , Yichao Wang , Shuailin Du , Jinfa Zhang
IPC分类号： H02M1/00 , H02M7/483 , H02M1/32 , H02M7/06
CPC分类号： H02M1/0095 , H02M1/32 , H02M7/4837 , H02M7/06
摘要： A multilevel conversion circuit having a flying capacitor is provided, including: a first bridge arm; a second bridge arm including a flying capacitor, the midpoints of the second and first bridge arms connected to a series branch defined by a first current limiting circuit, a power supply and an inductor; a DC bus capacitor connected in parallel to the first and second bridge arms; a rectifier circuit having an input end coupled to the power supply and an output end connected to a first auxiliary power supply; and a controller coupled to the first auxiliary power supply and the plurality of switches of the second bridge arm to control corresponding switches of the second bridge arm, the power supply charges the flying capacitor through the corresponding switches of the first and second bridge arms and the first current limiting circuit.

55. 发明授权

US11728087B2 Core structure and magnetic device 有权
公开(公告)号：US11728087B2
公开(公告)日：2023-08-15
申请号：US16992166
申请日：2020-08-13
申请人： Delta Electronics (Shanghai) CO., LTD
发明人： Haijun Yang , Zengyi Lu , Tianding Hong , Jinfa Zhang
IPC分类号： H01F27/24 , H01F41/04 , H01F27/28
CPC分类号： H01F27/24 , H01F27/2804 , H01F41/041
摘要： A magnetic dev ice includes a core structure, at least one inductor winding and at least two transformer windings. The core structure includes at least one inductor column and at least two transformer columns. The at least one inductor winding respectively winds around the at least one inductor column. The at least two transformer windings, wind around the at least two transformer columns respectively, and the transformer winding includes primary winding and secondary winding. Wherein the magnetic flax directions on adjacent transformer columns are opposite to each other when providing a current in the corresponding primary windings simultaneously.

56. 发明授权

US11616449B2 Power adapter 有权
公开(公告)号：US11616449B2
公开(公告)日：2023-03-28
申请号：US17212056
申请日：2021-03-25
申请人： Delta Electronics (Shanghai) CO., LTD
发明人： Jian Zhou , Haibin Song , Daofei Xu , Jinfa Zhang
IPC分类号： H02M3/335 , H02M1/08 , H02M1/00
摘要： A power adapter, includes: a transformer, including a primary winding and a secondary winding; a primary circuit, including a primary main switch, electrically coupled to the primary winding; a secondary circuit, including a first switch unit and a second switch unit; a first end of the first switch unit and a first end of the second switch unit are coupled to the secondary winding of the transformer, and a second end of the first switch unit and a second end of the second switch unit connected to a first output port and a second output port, respectively; a control circuit, configured to detect output voltages of the first output port and the second output port, and controlling the primary main switch, the first switch unit and the second switch unit to adjust the output voltages of the first output port and the second output port.

57. 发明授权

US11502501B2 Overcurrent protection circuit and bi-directional converter 有权
公开(公告)号：US11502501B2
公开(公告)日：2022-11-15
申请号：US17104119
申请日：2020-11-25
申请人： Delta Electronics (Shanghai) CO., LTD
发明人： Guoqiao Shen , Jinfa Zhang , Yuhu Zhou
IPC分类号： H02H3/00 , H02H3/087 , H02H1/00 , H02H7/10
摘要： The invention discloses an overcurrent protection circuit, coupled to a DC bus between first and second DC ends, the DC bus including positive bus and negative bus, and the circuit including: a main protection branch connected in series with the positive or negative bus, and including first and second protection switches connected in series and connected to a first node; a freewheeling switch branch having two ends, one end being connected to the first node, the other end being connected to an opposite bus to the main protection branch; a detection unit coupled to the DC bus for detecting a voltage or a current of the DC bus to output an overcurrent detection signal; and a control unit coupled to the detection unit and the main protection branch, and configured to control the main protection branch according to the overcurrent detection signal.

58. 发明授权

US11482938B2 Isolated resonant converter 有权
公开(公告)号：US11482938B2
公开(公告)日：2022-10-25
申请号：US17015015
申请日：2020-09-08
申请人： Delta Electronics (Shanghai) CO., LTD
发明人： Zengyi Lu , Haijun Yang , Shiwei Liu , Jinfa Zhang
IPC分类号： H02M3/335 , H01F27/24 , H01F27/28 , H01F27/34 , H02M1/44 , H02M1/00
摘要： An isolated resonant converter is provided, including a first side circuit, a second side circuit, and a resonant tank circuit. The resonant tank circuit includes a first resonant capacitor, a second resonant capacitor, and an integrated magnetic element. The integrated magnetic element includes a first side winding, a second side winding and a spaced groove provided between the first side winding and the second side winding. And the spaced groove stores leakage inductance energy, thereby forming at least part of resonant inductance required. Therefore, a number and volume of magnetic elements in the resonant converter are reduced.

59. 发明授权

US11444541B2 Control method for DC/DC converter and DC/DC converter 有权
公开(公告)号：US11444541B2
公开(公告)日：2022-09-13
申请号：US17348781
申请日：2021-06-16
申请人： Delta Electronics (Shanghai) Co., Ltd.
发明人： Hao Sun , Minli Jia , Jinfa Zhang
IPC分类号： H02M3/335 , H02M1/00 , H02M1/08
摘要： A control method for a DC/DC converter and a DC/DC converter are provided. The method includes: providing a first primary side driving signal to drive the first switch and the fourth switch, and providing a second primary side driving signal to drive the second switch and the third switch; and providing a fifth signal, a sixth signal, a seventh signal and an eighth signal; where switches of the first secondary side bridge arm or the second secondary side bridge arm are turned on or turned off at a zero crossing point of a primary side current, and a driving signal of the second secondary side bridge arm has a phase shift angle with respect to that of the first secondary side bridge arm and the fifth signal is complementary to the sixth signal, and the seventh signal is complementary to the eighth signal.

60. 发明授权

US11349397B2 Method and apparatus for controlling a flyback converter 有权
公开(公告)号：US11349397B2
公开(公告)日：2022-05-31
申请号：US17008593
申请日：2020-08-31
申请人： Delta Electronics (Shanghai) Co., Ltd.
发明人： Haibin Song , Daofei Xu , Jinfa Zhang
IPC分类号： H02M3/335 , H02M1/00 , H02M1/34
摘要： The present invention discloses a method and an apparatus for controlling a flyback converter, the flyback converter including a main switch, a transformer, and an auxiliary switch. The method includes: obtaining a first voltage signal and a second voltage signal, the first voltage signal representing an input voltage of the flyback converter, and the second voltage signal representing an output voltage of the flyback converter; controlling turn-on of the auxiliary switch, wherein the turn-on time period of the auxiliary switch is determined according to the first voltage signal and the second voltage signal; and turning on the main switch at ZVS condition, wherein the main switch is turned on at the time delayed for a duration of a dead time after turning off of the auxiliary switch.

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