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    • 5. 发明公开
    • ISOLATED FLY-BUCK CONVERTER, SWITCHED MODE POWER SUPPLY, AND METHOD OF MEASURING A VOLTAGE ON A SECONDARY SIDE OF AN ISOLATED FLY-BUCK CONVERTER
    • 隔离开关,电源和法测量的电压下变换器隔离的二次侧
    • EP3117513A1
    • 2017-01-18
    • EP14713277.3
    • 2014-03-11
    • Telefonaktiebolaget LM Ericsson (publ)
    • KARLSSON, MagnusPERSSON, Oscar
    • H02M3/158H02M3/335
    • H02M3/33569H02M3/158H02M3/335H02M3/3353H02M2001/0022
    • An isolated fly-buck converter provided for converting an input voltage (Vin) to an output voltage (VS) comprises (i) on a primary side, a primary winding (X1) and a non-isolated buck (CP) connected in series, and a pair of switches (Q1, Q2), wherein the switches are switchable between a forward phase, in which the primary winding and the non-isolated buck are connected to the input voltage, and a fly-buck phase, in which the primary winding and the non-isolated buck are disconnected from the input voltage and are connected to one another in a closed circuit; and (ii) on a secondary side, a secondary winding (X2) coupled to the primary winding, and a first capacitive element (CS) connected over the secondary winding and a first rectifying element (D1) connected to the secondary winding to prevent current from being flown through the secondary winding during the forward phase, wherein the output voltage is achieved as the voltage over the first capacitive element. A supplementary circuitry is provided at the secondary side by aid of which the input voltage can be measured on the secondary side, the supplementary circuitry comprising a second capacitive element (CF) and a second rectifying element (D2) connected in series, wherein the supplementary circuitry is connected over the second wiring such that the second rectifying element prevents current from being flown through the supplementary circuitry during the fly-buck phase, wherein the sum of the voltage over the second capacitive element and the output voltage is indicative of the input voltage.
    • 提供了一种用于转换到输入电压(Vin)对输出电压的分离的蝇降压转换器(VS)包含(i)串联连接的初级侧,一个初级绕组(X1)和非隔离降压(CP), 和一对开关(Q1,Q2),worin开关是一个正向相位之间进行切换,其中,所述初级绕组和非隔离降压被连接到输入电压,和蝇降压阶段,其中,所述初级 绕组和非隔离降压从输入电压断开,并连接到彼此在闭合回路; 和(ii)在次级侧,一个次级绕组(X2),其耦合到初级绕组,以及连接在所述次级绕组和连接到次级绕组,以防止电流的第一整流元件(D1)的第一电容元件(CS) 从在正程阶段通过次级绕组正在飞行,worin输出电压达到:作为在所述第一电容性元件上的电压。 甲补充电路是由哪个援助提供在次级侧上的输入电压可以在次级侧上进行测量,所述辅助电路包括一第二电容元件(CF)以及串联连接的第二整流元件(D2),worin补充 电路被连接在检查做的第二整流元件,从通过在蝇降压相辅助电路正在飞行,在第二电容元件和所述输出电压worin的电压的总和防止电流在第二布线是表示输入电压的 ,
    • 6. 发明公开
    • CONVERTER CIRCUITRY
    • WANDLERSCHALTUNG
    • EP3114762A1
    • 2017-01-11
    • EP15710065.2
    • 2015-03-04
    • Cree, Inc.
    • LIU, XueChaoMOOKKEN, John
    • H02M3/335
    • H02M3/33507H02M1/08H02M3/3353H02M3/33569H02M2001/0048Y02B70/1433Y02B70/1483
    • Disclosed is a DC-DC converter with a converter bridge, tank circuitry, and rectifier circuitry. In one embodiment, the converter bridge includes multiple switch circuits, which are formed with silicon carbide MOSFETs (metal on semiconductor field effect transistors), and are configured to provide a primary current. The tank circuitry includes a resonant capacitance, a resonant inductance, and a transformer with a primary, a first secondary, and a second secondary. The tank circuitry is configured to receive the primary current, and the transformer is associated with a magnetizing inductance. The resonant frequency of the tank circuitry is greater than about 225 kilohertz as essentially defined by the magnetizing inductance, the resonant capacitance, and the resonant inductance. The rectifier circuitry is coupled to the first secondary and the second secondary coil, and is adapted to provide a rectified output current.
    • 公开了一种具有转换器桥,电路和整流电路的DC-DC转换器。 在一个实施例中,转换器桥包括由碳化硅MOSFET(半导体场效应晶体管上的金属)形成的多个开关电路,并且被配置为提供初级电流。 所述储能电路包括谐振电容,谐振电感和具有初级,第一次级和第二次级的变压器。 电容器电路被配置为接收初级电流,并且变压器与磁化电感相关联。 基本上由磁化电感,谐振电容和谐振电感定义,谐振电路的谐振频率大于约225千赫兹。 整流器电路耦合到第一次级线圈和第二次级线圈,并且适于提供经整流的输出电流。
    • 8. 发明公开
    • CONTROL DEVICE FOR RESONANCE-TYPE DC-DC CONVERTER
    • STEUERUNGSVORRICHTUNGFÜRGLEICHSPANNUNGSRESONANZWANDLER
    • EP2811638A4
    • 2016-04-20
    • EP12867379
    • 2012-12-20
    • FUJI ELECTRIC CO LTD
    • NISHIKAWA YUKIHIRO
    • H02M3/28H02M1/00H02M3/335
    • H02M3/33507H02M1/081H02M1/088H02M3/3353H02M3/33553H02M3/33569H02M2001/0003H02M2001/0032H02M2001/0058Y02B70/1433Y02B70/1491Y02B70/16
    • Included are a means for detecting a direct current output voltage, a direct current output current, or the like, in accordance with the status of a load of a resonant DC-DC converter and determines a control amount for controlling the turning on and off of switching elements, a frequency modulation control means for executing a frequency modulation control of the switching elements at a frequency lower than a resonance frequency based on the control amount, a means for executing a fixed frequency control of the switching elements at a frequency in the vicinity of the resonance frequency based on the control amount, and a pulse distribution means for generating drive pulses of the switching elements based on an output of each control means. The invention is such that when the direct current output voltage of the converter is of a value such that exceeds the maximum value that can be output in a fixed frequency control region, there is a switch from fixed frequency control to frequency modulation control. Because of this, conduction loss and turn-off loss caused by backflow current among the semiconductor switching elements are reduced, power conversion efficiency is improved, and the range of voltage that can be output by the resonant DC-DC converter is expanded.
    • 包括根据谐振DC-DC转换器的负载的状态来检测直流输出电压,直流输出电流等的装置,并且确定用于控制开关的控制量 开关元件,用于基于控制量以比谐振频率低的频率执行开关元件的频率调制控制的频率调制控制装置,用于以附近的频率执行开关元件的固定频率控制的装置 基于控制量的共振频率的脉冲分配装置,以及用于基于每个控制装置的输出产生开关元件的驱动脉冲的脉冲分配装置。 本发明使得当转换器的直流输出电压具有超过在固定频率控制区域中输出的最大值的值时,存在从固定频率控制到频率调制控制的切换。 因此,降低了半导体开关元件之间的回流电流导致的导通损耗和关断损耗,提高了电力转换效率,并且扩大了可由谐振DC-DC转换器输出的电压范围。