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    • 91. 发明专利
    • 絶縁型スイッチング電源装置
    • 绝缘型开关电源装置
    • JPWO2013047119A1
    • 2015-03-26
    • JP2013536122
    • 2012-09-05
    • 株式会社村田製作所
    • 匡彦 松本匡彦 松本
    • H02M3/28
    • H02M3/33592Y02B70/1475
    • 副スイッチング素子(Q2)は主スイッチング素子(Q1)とデッドタイムを挟んで相補的なタイミングで駆動される。副スイッチング素子(Q2)とコンデンサ(C6)の直列回路が電力伝送トランス(MT)の1次巻線(Np11)の一端に接続されてアクティブクランプ回路を構成している。直列インダクタ(L1)は電力伝送トランス(MT)の1次巻線(Np11)に対して直列に接続されている。トランス(MT)の2次巻線(Ns11)には、第1の同期整流素子(Q4)、第2の同期整流素子(Q3)、第1の平滑コンデンサ(C3)、第2の平滑コンデンサ(C2)が接続されている。この回路構成によって、2次側整流素子による導通損失の影響を小さくして、高効率な電力変換を可能とする。
    • 子开关元件(Q2)中的互补的定时和整个死区时间的主开关元件(Q1)被驱动。 子开关元件(Q2)和电容器(C6)的串联电路连接到电力传输变压器(MT)的初级绕组(Np11)的一端与构成有源钳位电路。 连接在与所述串联电感器(L1)系列是初级绕组的电力传输变压器(MT)(Np11)的。 变压器次级绕组的(NS11)(MT),所述第一同步整流器(Q4),所述第二同步整流器(Q3),一个第一平滑电容器(C3),一个第二平滑电容器( C2)连接。 这种电路结构,并降低导通损耗的影响,由于在次级侧整流元件,使高效率的电力变换。
    • 97. 发明专利
    • Isolated flyback converter with an efficient light-load operation
    • JP5453508B2
    • 2014-03-26
    • JP2012254113
    • 2012-11-20
    • リニアー テクノロジー コーポレイションLinear Technology Corporation
    • ディー. モリス ジョンジー. ネグレ マイケルミン チェン
    • H02M3/28H02M1/00H02M1/32
    • H02M1/32H02M3/33584H02M3/33592H02M2001/0032Y02B70/1475Y02B70/16
    • A flyback converter (20) uses primary side sensing to sense the output voltage for regulating feedback. The flyback converter comprises a transformer with a primary winding (L1) and a secondary winding (L2), a first transistor (M1) coupled to the primary winding for conducting a current through the primary winding when the first transistor is on a second transistor (M2) for conducting a current through the secondary winding when the second transistor is on a regulator (14) coupled to the first transistor for controlling a duty cycle of the first transistor to regulate an output voltage of the converter, the regulator being configured to control the first transistor to have a minimum duty cycle, an output capacitor (C1) coupled to an output terminal of the converter, a synchronous rectifier controller (24) coupled to the second transistor for controlling the second transistor to be on or off, a comparator (42) having one input coupled to receive a voltage corresponding to the output voltage of the converter and having another input connected to a reference voltage representing a threshold voltage exceeding a regulated voltage of the converter, wherein triggering of the comparator signifies an over-voltage condition, an output of the comparator being coupled so as to control the synchronous rectifier controller to turn the second transistor on for an interval to conduct a reverse current through the secondary winding, upon an over-voltage condition being detected, to reduce the output voltage of the converter to mitigate the over-voltage condition, and a diode (D1) coupled to the primary winding to conduct a current through the primary winding after the interval without turning on the first transistor, such that power is transferred from a secondary side of the transformer to the power source while mitigating the over-voltage condition.
    • 99. 发明专利
    • Power-supply device
    • 电源设备
    • JP2014023391A
    • 2014-02-03
    • JP2012162863
    • 2012-07-23
    • Hitachi Automotive Systems Ltd日立オートモティブシステムズ株式会社
    • SATO TOSHIOSENDA TADAHIKOKUBO KENJIHIGUCHI KATSUHIRO
    • H02M3/28H02M3/155
    • H02M3/33592H02M3/3376Y02B70/1475
    • PROBLEM TO BE SOLVED: To provide a power-supply device with high efficiency and low noise.SOLUTION: The power-supply device includes: a transformer 3; a DC-AC conversion circuit 2 connected to a primary side of the transformer 3, converting inputted DC power into AC power, and outputting the AC power to the transformer 3; and a rectifier circuit 4 connected to a secondary side of the transformer 3 and converting the AC power transformed by the transformer 3 into DC power. The rectifier circuit 4 has each MOSFET 20 of switching circuits SWA1 to SWA4 that are electrically connected in parallel to one another to one end of the secondary side of the transformer 3, each MOSFET of switching circuits SWB1 to SWB4 that are electrically connected in parallel to one another to the other end of the secondary side of the transformer 3, and capacitors 21a and 21b that are electrically connected in parallel to each of the MOSFETs.
    • 要解决的问题:提供具有高效率和低噪声的电源装置。解决方案:电源装置包括:变压器3; 连接到变压器3的初级侧的DC-AC转换电路2,将输入的直流电力转换为交流电力,并向变压器3输出交流电力; 以及连接到变压器3的次级侧并将由变压器3变换的AC电力转换为直流电力的整流电路4。 整流电路4具有开关电路SWA1〜SWA4的各个MOSFET 20,它们彼此并联地连接到变压器3的次级侧的一端,开关电路SWB1至SWB4的每个MOSFET并联电连接到 彼此相对于变压器3的次级侧的另一端,以及电容器21a和21b,其与每个MOSFET并联电连接。
    • 100. 发明专利
    • Dc-dc converter
    • DC-DC转换器
    • JP2013116016A
    • 2013-06-10
    • JP2011263102
    • 2011-11-30
    • Toshiba Corp株式会社東芝
    • NAKAJIMA YUKI
    • H02M3/28H02M3/335
    • Y02B70/1475
    • PROBLEM TO BE SOLVED: To provide a DC-DC converter capable of achieving high efficiency by suppressing loss at a rectification switching element in a DC-DC converter using a synchronous rectification circuit.SOLUTION: In generating a driving signal of a rectification switching element in a synchronous rectification circuit, especially for generation and control of off-timing thereof, a load-side current is predicted from a primary-side current. In addition to the control of off timing suited to the predicted load current and fluctuations thereof, a temperature of the rectification switching element under operation is detected and timing compensation is performed based on a change in a current drop rate due to temperature characteristics thereof.
    • 解决的问题:提供一种能够通过抑制使用同步整流电路的DC-DC转换器中的整流开关元件的损耗而实现高效率的DC-DC转换器。 解决方案:在产生同步整流电路中的整流开关元件的驱动信号时,特别是用于其关断定时的产生和控制时,从一次侧电流预测负载侧电流。 除了适合于预测负载电流及其波动的关断定时的控制之外,检测正在运行的整流开关元件的温度,并且基于由于其温度特性引起的电流下降率的变化来执行定时补偿。 版权所有(C)2013,JPO&INPIT