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1.发明申请公开(公告)号：US20230020108A1
公开(公告)日：2023-01-19
申请号：US17810639
申请日：2022-07-04
Applicant: Delta Electronics (Shanghai) Co.,Ltd.
Inventor： Yichao WANG , Kai DONG , Shuailin DU , Jinfa ZHANG
Abstract: Multilevel conversion circuit having a flying capacitor and method for precharging the same are provided. The multilevel conversion circuit includes: a first bridge arm including a plurality of switches connected in series; a second bridge arm including a plurality of switches connected in series and a flying capacitor group, midpoints of the two bridge arms connected to a power supply and an inductor to form a series branch; a DC bus capacitor to which the two bridge arms are connected in parallel; a first voltage clamping module connected between a first end of the flying capacitor group and a first end of the DC bus capacitor; and a second voltage clamping module connected between a second end of the flying capacitor group and a second end of the DC bus capacitor.
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公开(公告)号：US20220349951A1
公开(公告)日：2022-11-03
申请号：US17660212
申请日：2022-04-22
Applicant: Delta Electronics (Shanghai) Co., Ltd.
Inventor： Yunfei LIU , Haibin SONG , Daofei XU , Jinfa ZHANG
Abstract: The present application provides a detecting method of an operating state of a power supply and a detecting apparatus, where the power supply includes a primary circuit, a transformer and a secondary circuit. The secondary circuit includes a secondary current detecting unit, a temperature detecting unit and a secondary controlling unit. Firstly the secondary current detecting unit detects a current value of the secondary circuit, then the secondary controlling unit compares the current value of the secondary circuit with a preset current threshold. When the current value of the secondary circuit is less than or equal to the preset current threshold, the temperature detecting unit detects a temperature value of the power supply and the secondary controlling unit determines the operating state of the power supply according to the acquired temperature value of the power supply.
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公开(公告)号：US20220123660A1
公开(公告)日：2022-04-21
申请号：US17447057
申请日：2021-09-07
Applicant: Delta Electronics (Shanghai) Co.,Ltd.
Inventor： Jinfa ZHANG , Kai DONG , Changyun XIAO , Jinhao GAN , Yong HUANG , Junlai HUANG , Zhongwei KE
Abstract: The present application provides a power supply system for supplying power to network device, comprising power supply module, housing, and stereoscopic accommodating space therebetween. The power supply module without a fan comprises: a primary circuit comprising at least one primary switch and configured to receive AC input voltage and convert the AC input voltage into a first voltage; a transformer comprising primary and secondary windings and configured to convert the first voltage into a second voltage, the primary winding is coupled to the primary circuit; and a secondary circuit comprising at least one secondary switch and configured to convert the second voltage into a DC output voltage for the network device, the secondary circuit is coupled to the secondary winding, the secondary switch adopts SMT package, and power density of the power supply module is 60 W/inch3 or more. The stereoscopic accommodating space is filled with liquid coolant for cooling.
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公开(公告)号：US20210350975A1
公开(公告)日：2021-11-11
申请号：US17226521
申请日：2021-04-09
Applicant: Delta Electronics (Shanghai) CO., LTD
Inventor： Qi FU , Haibin SONG , Daofei XU , Zengyi LU , Jinfa ZHANG
IPC: H01F27/28 , H01F27/06 , H01F27/24 , H01F41/061
Abstract: The present invention provides a winding assembly and a magnetic assembly. The winding assembly comprises a first coil and a circuit board, and the first coil is embedded inside the circuit board; wherein the first coil comprises a conductive wire with at least one turn, and a height of the conductive wire in a direction perpendicular to the circuit board is not less than a width of the conductive wire in a direction parallel to the circuit board. The magnetic assembly comprises a first winding assembly and a magnetic core; wherein the first winding assembly comprises a first coil and a first circuit board, and the first coil comprises a conductive wire with at least one turn, the first coil is embedded inside the first circuit board, the first winding assembly is assembled with the magnetic core.
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公开(公告)号：US20210336529A1
公开(公告)日：2021-10-28
申请号：US17152747
申请日：2021-01-19
Applicant: Delta Electronics (Shanghai) Co., Ltd.
Inventor： Yuhu ZHOU , Haidong CHEN , Guoqiao SHEN , Jinfa ZHANG
Abstract: The present invention discloses a flying capacitor converter, a short circuit current suppression circuit for the same and an energy storage system. The flying capacitor converter comprises a controller, and has a high voltage side connected to a first power source and a low voltage side connected to a second power source. The short circuit current suppression circuit comprises: at least one current detection unit connected to the low voltage side and/or the high voltage side of the flying capacitor converter; and at least one switch set connected in series to the high voltage side and/or the low voltage side of the flying capacitor converter, wherein the controller controls the switch set to cut off a connection between the flying capacitor converter and the first power source and/or between the flying capacitor converter and the second power source, when the current detection unit detects a short circuit.
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Patent Agency Ranking
公开(公告)号：US20210293885A1
公开(公告)日：2021-09-23
申请号：US17169559
申请日：2021-02-08
Applicant: Delta Electronics (Shanghai) Co., Ltd.
Inventor： Linchun LI , Dezhi JIAO , Jinfa ZHANG
Abstract: The present disclosure relate to a fault diagnosis method, including: collecting at least one set of original data of the high voltage generator during operation, each condition attribute in a condition attribute set corresponding to one piece of original data; pre-processing the original data to obtain pre-processed data and generating a decision table; performing an attribute reduction based on the decision table to obtain a reduced condition attribute set and a reduced decision table; generating a decision tree model according to the reduced decision table; generating a decision forest model according to at least one decision tree model; obtaining a fault type and a fault level according to the decision forest model; determining an acceptable level of the fault according to the fault level and a frequency of occurrence of the same type of fault, and sending the fault type and the acceptable level to the display terminal.
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公开(公告)号：US20210083590A1
公开(公告)日：2021-03-18
申请号：US17015015
申请日：2020-09-08
Applicant: Delta Electronics (Shanghai) CO., LTD
Inventor： Zengyi LU , Haijun YANG , Shiwei LIU , Jinfa ZHANG
Abstract: 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.
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公开(公告)号：US20200251272A1
公开(公告)日：2020-08-06
申请号：US16740554
申请日：2020-01-13
Applicant: Delta Electronics (Shanghai) CO., LTD
Inventor： Haibin SONG , Qi FU , Daofei XU , Jinfa ZHANG
Abstract: A magnetic device comprises two base portions and magnetic pillars, wherein each of the two base portions has a first surface and the two first surfaces are faced to each other, and the magnetic pillars are disposed between the two first surfaces along a first direction, wherein, in the first direction, two of the magnetic pillars located at the outermost side of the base portion are a first corner pillar and a second corner pillar respectively, n of the magnetic pillars having the same cross-sectional area and located at the center position of the base portion are n center pillars, and cross-sectional area of the magnetic pillars are gradually increased from the first corner pillar to the center pillar closest to the first corner pillar, and from the second corner pillar to the center pillar closest to the second corner pillar.
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公开(公告)号：US20180294735A1
公开(公告)日：2018-10-11
申请号：US15944815
申请日：2018-04-04
Applicant: Delta Electronics (Shanghai) CO., LTD
Inventor： Haibin SONG , Jinfa ZHANG , Daofei XU
CPC classification number: H02M3/33592 , H02M1/083 , H02M2001/0058 , Y02B70/1475 , Y02B70/1491
Abstract: A control device applied to a flyback converter including an auxiliary switch includes: an output voltage integrator, configured to integrate an output voltage of the flyback converter to obtain an amplitude of a negative magnetizing current of the flyback converter; and a comparator controller, configured to compare the obtained amplitude of the negative magnetizing current with a reference value, and turn off the auxiliary switch according to a comparison result. According to the present disclosure, it is able to achieve zero voltage switching of a primary-side switch of the flyback converter with variable outputs.
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公开(公告)号：US20180294734A1
公开(公告)日：2018-10-11
申请号：US15944812
申请日：2018-04-04
Applicant: Delta Electronics (Shanghai) CO., LTD
Inventor： Haibin SONG , Jinfa ZHANG , Daofei XU
CPC classification number: H02M3/33592 , H02M1/083 , H02M3/335 , H02M3/33507 , H02M2001/0058 , Y02B70/1475 , Y02B70/1491
Abstract: A control device, which is applied to a flyback converter including an auxiliary switch, includes: an on-time setter, configured to set an on-time threshold according to a reference value and an output voltage of the flyback converter; and an on-time controller, configured to output a control signal to turn on the auxiliary switch, and turn off the auxiliary switch when on-time of the auxiliary switch reaches the on-time threshold. According to the present disclosure, it is able to achieve zero voltage switching of a primary-side switch of the flyback converter with variable outputs.
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