-
公开(公告)号：US20180159437A1
公开(公告)日：2018-06-07
申请号：US15662301
申请日：2017-07-28
Applicant: Delta Electronics (Shanghai) Co.,Ltd.
Inventor： Haibin SONG , Daofei XU , Jinfa ZHANG , Jian ZHOU , Qi FU , Leyang YANG
CPC classification number: H02M3/33592 , H02M1/083 , H02M2001/0009 , H02M2001/0058
Abstract: The present invention discloses a control method and a control apparatus for a Flyback circuit. The Flyback circuit includes a primary switch, a secondary rectifier unit, a transformer and an output capacitor. The secondary rectifier unit includes a first terminal and a second terminal, which are electrically connected to the transformer and the output capacitor, respectively. In the control method for a Flyback circuit, after the secondary rectifier unit is controlled to be turned on once or twice according to the input voltage and/or output power of the Flyback, the primary switch is turned on to achieve the zero-voltage-switching. According to the invention, the zero-voltage-switching (ZVS) of the primary switch can be achieved under the entire input voltage range and the entire load range without adding additional power devices.
-
公开(公告)号：US20210367508A1
公开(公告)日：2021-11-25
申请号：US17146471
申请日：2021-01-11
Applicant: Delta Electronics (Shanghai) Co., Ltd.
Inventor： Haibin SONG , Jian ZHOU , Qi FU , Daofei XU , Jinfa ZHANG
Abstract: The present invention discloses a power factor correction circuit. The power factor correction circuit includes: a first bridge arm having a first switch and a second switch; a second bridge arm having a third switch and a fourth switch; a first inductor and a second inductor; a first capacitor and/or a second capacitor connected with a common point between the second inductor and the first inductor; and a third capacitor and/or a fourth capacitor, the third capacitor connected in parallel to the third switch based on an arrangement of the second capacitor and having a capacitance value same as that of the second capacitor, the fourth capacitor connected in parallel to the fourth switch based on an arrangement of the first capacitor and having a capacitance value same as that of the first capacitor.
-
公开(公告)号：US20210350973A1
公开(公告)日：2021-11-11
申请号：US17226458
申请日：2021-04-09
Applicant: Delta Electronics (Shanghai) CO., LTD
Inventor： Qi FU , Haibin SONG , Daofei XU , Zengyi LU , Jinfa ZHANG
Abstract: Present disclosure provides a winding assembly and a magnetic element. The winding assembly includes a circuit board with a central hole and a first winding wound around the central hole in the circuit board; the first winding includes N turns of coil on at least two wiring layers; a second end of at least one turn of coil on a first wiring layers is connected to a first end of next turn of coil at corresponding position on a second wiring layer of the circuit board. The magnetic element includes a magnetic core and a winding assembly sleeved on a magnetic leg.
-
公开(公告)号：US20210233699A1
公开(公告)日：2021-07-29
申请号：US17216590
申请日：2021-03-29
Applicant: Delta Electronics (Shanghai) Co., Ltd.
Inventor： Haibin SONG , Zengyi LU , Jinfa ZHANG , Shiwei LIU , Jian ZHOU , Daofei XU , Jianwei SONG
Abstract: The present disclosure discloses a PCB winding transformer. The PCB winding transformer includes a magnetic core and a coil board with a multilayer structure. The coil board includes a primary coil and a secondary coil wound around a magnetic core column of the magnetic core. The secondary coil is located in a first layer and a last layer, and the primary coil is located in intermediate layers. The number of turns of the secondary coil is less than that of the primary coil. At least one via hole for connecting the first layer and the last layer of the secondary coil is disposed in the coil board between an inner side of the primary coil and the magnetic core column.
-
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.
-
Patent Agency Ranking
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.
-
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.
-
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.
-
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.
-
公开(公告)号：US20220385190A1
公开(公告)日：2022-12-01
申请号：US17659655
申请日：2022-04-18
Applicant: Delta Electronics (Shanghai) Co.,Ltd.
Inventor： Hairui XU , Haibin SONG , Daofei XU , Jinfa ZHANG
Abstract: The invention discloses a converter adaptable to a wide range output voltage and a control method thereof. The converter comprises a PWM half-bridge circuit. The control method comprises the steps of: controlling the PWM half-bridge circuit to enter into a discontinuous conduction mode by regulating a switching frequency; when the PWM half-bridge circuit is operated in the discontinuous conduction mode, oscillation occurs among the output inductor, a magnetizing inductor of the transformer and a parasitic capacitor of the PWM half-bridge circuit, and when a center point voltage of the primary switching bridge arm reaches a valley or a peak, turning on the corresponding power switch. The invention reduces switching loss by controlling the corresponding power switch in the PWM half-bridge circuit to turn on when a voltage across the power switch is oscillated to valley.
-
-
-
-
-
-
-
-
-
Search Results
19
records
(took 0.017 seconds)
