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1. CN110995003 - Forward-flyback switching power supply circuit

Office
China
Application Number 201911120052.1
Application Date 15.11.2019
Publication Number 110995003
Publication Date 10.04.2020
Grant Number 110995003
Grant Date 05.03.2021
Publication Kind B
IPC
H02M 3/335
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
3Conversion of dc power input into dc power output
22with intermediate conversion into ac
24by static converters
28using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
325using devices of a triode or a transistor type requiring continuous application of a control signal
335using semiconductor devices only
CPC
H02M 3/335
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
3Conversion of dc power input into dc power output
22with intermediate conversion into ac
24by static converters
28using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
325using devices of a triode or a transistor type requiring continuous application of a control signal
335using semiconductor devices only
H02M 1/0048
Y02B 70/10
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
70Technologies for an efficient end-user side electric power management and consumption
10Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Applicants GUANGZHOU MORNSUN SCIENCE & TECHNOLOGY LTD.
广州金升阳科技有限公司
Inventors ZHANG YANBIN
张彦斌
LIU XIAOXU
刘晓旭
FENG GANG
冯刚
Title
(EN) Forward-flyback switching power supply circuit
(ZH) 一种正反激式开关电源电路
Abstract
(EN) The invention discloses a forward-flyback switching power supply circuit. The circuit comprises a primary side circuit, a transformer T1 and a secondary side circuit, the secondary side circuit comprises a diode D1, a diode D2, a diode D3, a capacitor C1, a capacitor C2 and a capacitor C3; the end 4 of the transformer T1 is electrically connected with one end of the capacitor C2 and the anode of the diode D1; the other end of the capacitor C2 is electrically connected with the anode of the diode D2 and the other end of the capacitor C3; the cathode of the diode D2 is electrically connected with the end 3 of the transformer T1 and the other end of the capacitor C1; and the cathode of the diode D1 is electrically connected with one end of the capacitor C1 and the anode of the diode D3, and the cathode of the diode D3 is electrically connected with one end of the capacitor C3; the secondary side circuit is characterized in that the secondary side circuit further comprises an inductor L2,one end of the inductor L2 is connected with the end 3 of the transformer T1, and the other end of the inductor L2 is connected with the other end of the capacitor C1. As a transient current suppression device, the inductor can effectively reduce the peak current and short-circuit power consumption of the secondary side of the transformer and can improve the output efficiency when the output is short-circuited or the output voltage is relatively low.
(ZH) 本发明一种正反激式开关电源电路包括原边电路、变压器T1与副边电路,副边电路包括二极管D1、二极管D2、二极管D3、电容C1、电容C2、电容C3,变压器T1的4端电联接电容C2的一端和二极管D1的阳极,电容C2的另一端电联接二极管D2的阳极和电容C3的另一端,二极管D2的阴极电联接变压器T1的3端和电容C1的另一端,二极管D1的阴极电联接电容C1的一端和二极管D3的阳极,二极管D3的阴极电联接电容C3的一端,其特征在于:副边电路还包括电感L2,电感L2的一端连接变压器T1的3端,电感L2的另一端连接电容C1的另一端。本发明中的电感作为一种瞬态电流抑制器件,在输出短路或者输出电压较低时,可有效降低变压器副边峰值电流和短路功耗,提高输出效率。
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