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48 条记录 (耗时 0.01 秒)

    Energy converter
    24.
    发明公开
    Energy converter 失效
    能量转换器

    公开(公告)号：EP0071285A1

    公开(公告)日：1983-02-09

    申请号：EP82200836.3

    申请日：1982-07-05

    申请人： HOLLANDSE SIGNAALAPPARATEN B.V.

    发明人： Buikema, Wolter

    IPC分类号： H02M7/515

    CPC分类号： H02M3/3155 ,  H02M7/5236

    摘要： In an energy converter of the type utilising a series-resonant bridge circuit (1), containing at least two thyristors (6, 7) diodes (8, 9), antiparallel connected thereto and a high-frequency output transformer (23), and an energy buffer (2), a control circuit (20) is incorporated for generating trigger pulses for the appropriate thyristors in response to the energy of the buffer (2). The energy converter comprises meane for ensuring that the diode, antiparallel connected to the last-conducting thyristor, starts to draw current immediately after this thyristor is blocked. The control circuit furthermore generates signals indicative of the presence of current flowing through the diodes (8, 9), which signals control the supply of the trigger pulses to the thyristors (6,7).

    摘要翻译： 在利用串联谐振电桥电路（1）的类型的能量转换器中，其包含至少两个反并联连接的晶闸管（6,7）二极管（8,9）和高频输出变压器（23），以及 一个能量缓冲器（2），一个控制电路（20），用于响应缓冲器（2）的能量产生适当的晶闸管的触发脉冲。 能量转换器包含一个简单的功能，用于确保连接到最后导通晶闸管的反并联二极管在晶闸管截止后立即开始吸收电流。 此外，控制电路产生指示流过二极管（8,9）的电流存在的信号，该信号控制向晶闸管（6,7）提供触发脉冲。

    Resonant converter
    26.
    发明公开
    Resonant converter 有权
    调节谐振转换器

    公开(公告)号：EP1124317A3

    公开(公告)日：2003-10-15

    申请号：EP01200452.9

    申请日：2001-02-08

    申请人： OXFORD MAGNET TECHNOLOGY LIMITED

    发明人： Hickman, Kevin

    IPC分类号： H02M3/337 ,  H02M3/335 ,  H02M3/28 ,  H02M3/338

    CPC分类号： H02M7/5236 ,  H02M2007/4815 ,  Y02B70/1441

    摘要： There is disclosed a parallel loaded series resonant converter 300 suitable for supplying DC to a three axis gradient amplifier in an MRI system. In conventional resonant circuits, output voltage is regulated by controlling the switching frequency of an H-bridge or half bridge switching arrangement and the resonant circuit (334, 335) is under more stress at no load than at full load. The voltage across the resonant capacitor (334) is a function of the switching frequency, the load and the voltage applied across the resonant circuit (V A -V B ). In the present invention, the peak current at no load is reduced to lower than the peak current at full load by controlling the voltage applied to the resonant circuit (V A -V B ) rather than controlling the switching frequency.

    VERFAHREN ZUM REGELN UND/ODER STEUERN EINER SCHWEISSSTROMQUELLE MIT EINEM RESONANZKREIS
    27.
    发明公开
    VERFAHREN ZUM REGELN UND/ODER STEUERN EINER SCHWEISSSTROMQUELLE MIT EINEM RESONANZKREIS 有权
    方法用于控制和/或控制与谐振电路焊接电源

    公开(公告)号：EP1251991A1

    公开(公告)日：2002-10-30

    申请号：EP01901013.1

    申请日：2001-01-19

    申请人： Fronius International GmbH

    发明人： AIGNER, Hubert

    IPC分类号： B23K9/10 ,  H02M3/337

    CPC分类号： H02M7/5236 ,  B23K9/1056

    摘要： The invention relates to a method for regulating a welding current source (2) with a resonance circuit (27). According to said method, a bridge circuit (28) is driven through a control device (4). A consumer, especially a welding process, is supplied with energy from an energy source (29) through said bridge circuit (28). Said predetermined switching states (S1 to S6) are stored for driving the individual switching elements (32 to 35) of the bridge circuit (28). When the control device is in its normal operating mode, the bridge circuit (28) is driven according to the switching states (S1 to S4) in succession. In the event of a change in resistance on the consumer side, the control device (5) executes a special operating mode with the resonance frequency of the resonance circuit (27) and drives the bridge circuit (28) according to the switching state provided for the special operating mode.

    Convertisseur de puissance à commande améliorée des commutateurs principaux et son application dans un convertisseur de puissance à trois ou plus niveaux de tension
    29.
    发明公开
    Convertisseur de puissance à commande améliorée des commutateurs principaux et son application dans un convertisseur de puissance à trois ou plus niveaux de tension 失效
    功率转换器，具有改进的功率开关控制器及其INE具有至少三个电压调节器的功率转换器使用

    公开(公告)号：EP0851569A1

    公开(公告)日：1998-07-01

    申请号：EP97403133.8

    申请日：1997-12-23

    申请人： ALCATEL ALSTHOM COMPAGNIE GENERALE D'ELECTRICITE

    发明人： Rudniski, David ,  Cazabat, Stéphane ,  Delay, Christian ,  Sanhet, Jean-Louis

    IPC分类号： H02M7/519 ,  H02M7/523

    CPC分类号： H02M7/519 ,  H02M7/5236

    摘要： Convertisseur de puissance comprenant deux commutateurs principaux (S1 et S2) connectant une sortie (S), soit au rail positif (VR+), soit au rail négatif (VR-), deux diodes de roue libre (D1 et D2) permettant le maintien du courant dans la charge (L), deux condensateurs de basculement (C1 et C2) et un circuit auxiliaire (CA) comprenant notamment une inductance auxiliaire (LA) en série avec deux commutateurs auxiliaires (T1 et T2), couplé entre la sortie (S) et un point milieu (M) d'un diviseur de tension capacitif (DC) fournissant une tension médiane.
    Des moyens (CAP1, CAP2 ; CC1, CC2 ; DCM) sont prévus pour détecter une oscillation de courant entre ladite inductance auxiliaire (LA) et lesdits condensateurs de basculement (C1, C2), puis l'interruption de ce courant d'oscillation, et pour causer la mise en conduction dudit commutateur principal visé (S1 ; S2), en réponse à ladite interruption.

    摘要翻译： 该功率转换器具有两个主开关（S1，S2）其中连接到正输出（S）到任何一个（VR +）或负电源轨（VR）。 两个续流二极管（D1，D2）中的负载（L）和两个开关电容器（C1，C2）和辅助电路（CA）支持当前提供的中值电压。 辅助电路具有与它们连接的输出端（S）和一个电容分压器（DC）的中点（M）之间的两个辅助开关（T1，T2）系列辅助电感器（LA）。 检测器（CAP，CC，DCM）检测振荡的电流中的辅助电感器和开关电容器，则振荡电流中断之间。 这种中断触发了主开关的导通模式的启动。

    WIDE LOAD MATCHING CAPABILITY POWER SUPPLY.
    30.
    发明公开
    WIDE LOAD MATCHING CAPABILITY POWER SUPPLY. 失效
    与宽的负载适应能力的电源。

    公开(公告)号：EP0680671A4

    公开(公告)日：1997-05-02

    申请号：EP94905329

    申请日：1993-12-01

    申请人： AJAX MAGNETHERMIC CORP

    发明人： HAVAS GEORGE ,  VAUGHN ARTHUR L

    IPC分类号： H02M7/523 ,  H05B6/04

    CPC分类号： H05B6/04 ,  H02M7/5236

    摘要： A high frequency power inverter comprises a power supply (20), a thyristor (SCR5 or SCR6) for switching the energy from the power supply to a load (10) and a neutral capacitor (C3) for storing energy cyclically to assure reverse voltage is applied to the thyristor (SCR5 or SCR6). A clamp circuit (L9, L10, D3, D4) is comprised of an inductor (L9 or L10) having a relatively large value for permitting a gradual leaking of the capacitor voltage during an inverting of the power supply voltage to the load (10) so that the capacitor (C3) can ring-up to a higher value than the supply voltage. The inductor (L9, L10) is selected so that under all conditions, the voltage on the capacitor (C3) will be safely larger than the power supply voltage plus a load voltage peak for a time long enough to assure thyristor turn off.