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公开(公告)号：EP0843403A1
公开(公告)日：1998-05-20
申请号：EP97915699.9
申请日：1997-04-10
IPC分类号： H02M3/338
CPC分类号： H02M1/34 , H02M3/33569 , H02M3/338 , H02M2001/342 , H02M2001/346 , Y02B70/1491
摘要： A RCC switching power is turned on/off repeatedly by a main switching means (9) to supply a switching current to a primary winding (31) and an energy is transferred from the primary side to the secondary side by flyback operation. A circuit composed of a series connection of a snubber capacitor (7) in a snubber circuit (5a to 5c) and an auxiliary switching means (3) is connected in parallel to the primary winding (31). When the auxiliary switching means (3) is closed by an auxiliary winding (4) while the main switching means (9) is opened, the auxiliary switching means (3) performs a third quadrant operation in which the snubber capacitor (7) is charged by the energy stored in the leakage inductance component of the primary winding (31) and then performs a first quadrant operation in which the snubber capacitor (7) is discharged to supply a current to the primary winding (31). By the current, the energy is transferred to the secondary winding side (32) or a smoothing capacitor (21) on the primary side is charged and the energy is transferred to a primary side rectifying/smoothing means (18). As a surge voltage is not applied to the main switching means (9) and the energy stored in the leakage inductance component is not wasted, a low noise and high efficiency RCC switching power supply (2a to 2c) is obtained.
摘要翻译： 通过主开关装置（9）重复地接通/断开RCC开关电源，以向初级绕组（31）提供开关电流，并且通过反激操作将能量从初级侧传递到次级侧。 由缓冲电路（5a〜5c）中的缓冲电容器（7）和辅助开关装置（3）的串联连接构成的电路与初级绕组（31）并联连接。 当辅助开关装置（3）在主开关装置（9）断开时由辅助绕组（4）闭合时，辅助开关装置（3）执行缓冲电容器（7）被充电的第三象限操作 通过存储在初级绕组（31）的漏电感分量中的能量，然后执行缓冲电容器（7）放电以向初级绕组（31）提供电流的第一象限操作。 通过电流，能量被传递到次级绕组侧（32），初级侧的平滑电容器（21）被充电，能量被传递到初级侧整流/平滑装置（18）。 由于不向主开关装置（9）施加浪涌电压，并且不会浪费存储在漏电感部件中的能量，所以能够获得低噪声，高效率的RCC开关电源（2a〜2c）。
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公开(公告)号：EP0806075A1
公开(公告)日：1997-11-12
申请号：EP96935273.0
申请日：1996-11-18
发明人： HEERINGA, Schelte
CPC分类号： H02M3/338
摘要： In a self-oscillating power-supply circuit for charging a battery (B) the switching transistor (T2) is turned off if the voltage across the sensing resistor (R3) exceeds the threshold voltage of a zener diode (D5). The zener diode (D5) is arranged in parallel with the series arrangement of the base-emitter junction of the switching transistor (T2) and the sensing resistor (R3), so that the voltage of the battery (B) does not influence the peak current at which the switching transistor (T2) is turned off. A diode (D6) is arranged in series with the zener diode (D5) and can be short-circuited by means of a switch (T3) in order to switch the power-supply circuit from slow charging to rapid charging. A voltage sensor (R8, R9, T4) monitors the battery voltage and eliminates the short-circuit of the diode (D6) when a given battery voltage is reached, as a result of which the power-supply circuit changes over to slow charging. A cascode transistor (T1) protects the switching transistor (T2) against overvoltage and stabilizes the voltage on the supply terminal (N3) to which the starting resistor (R6) is connected. This allows an accurate dosing of the current during slow charging.
摘要翻译： 在用于对电池（B）充电的自激振荡电源电路中，如果感测电阻器（R3）两端的电压超过齐纳二极管（D5）的阈值电压，则开关晶体管（T2）截止。 齐纳二极管（D5）与开关晶体管（T2）的基极 - 发射极结和检测电阻（R3）的串联布置并联布置，使得电池（B）的电压不影响峰值 开关晶体管（T2）关断的电流。 二极管（D6）与齐纳二极管（D5）串联布置，并且可以通过开关（T3）短路以将电源电路从慢速充电切换到快速充电。 电压传感器（R8，R9，T4）监测电池电压，并在达到给定电池电压时消除二极管（D6）的短路，因此电源电路转换为慢速充电。 共源共栅晶体管（T1）保护开关晶体管（T2）不受过电压的影响，并稳定启动电阻（R6）所连接的电源端（N3）上的电压。 这允许在缓慢充电期间准确地计量电流。
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43.发明公开SNUBBER CIRCUIT, SWITCHING POWER-SUPPLY, AND SATURABLE INDUCTOR USED FOR THEM 失效SHOCKS电路，电源和ENSURE二手饱和INDUKTOR
公开(公告)号：EP0720277A4
公开(公告)日：1996-04-01
申请号：EP93921060
申请日：1993-09-22
申请人： TOSHIBA KK
发明人： SATOH MORIO , MOMOSE KENICHIRO , SAITO TADAO , KUSAKA TAKAO
IPC分类号： H02M1/34 , H02M3/335 , H02M3/338 , H03K17/0814 , H03K17/082 , H02M3/28 , H01F27/24
CPC分类号： H02M1/34 , H02M3/335 , H02M3/338 , H02M2001/348 , H03K17/08142 , H03K17/0822
摘要： A snubber circuit has a saturable inductor formed out of amorphous alloy and others connected in series to the driver of a switching element. A switching power-supply is either of a flyback self-excited type or of a separately excited type, and is provided with a saturable inductor connected in series between a switching element connected in series to the primary coil of a transformer and a driving circuit which operates this switching element. This saturable inductor enhances the efficiency and suppresses noises, and is used for the above-mentioned snubber circuit and switching power-supply. The exciting current Iex is less than 3(A), and the magnetic flux Ζ (Wb/m2) is within 2 to 20 % of the product of the operation cycle T(sec) by the circuit voltage E(V).
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公开(公告)号：EP0645878A1
公开(公告)日：1995-03-29
申请号：EP94306747.0
申请日：1994-09-14
申请人： AT&T Corp.
发明人： Wu, You-Sun
CPC分类号： H02M3/338 , H02M3/335 , Y02B70/1433
摘要： Apparatus for variably converting a DC voltage to a different DC voltage level comprises a multi-resonant electronic power converter (50) with a wide output voltage dynamic range. The power conversion is accomplished by converting (in 20) the DC voltage (1) to an AC signal, adjusting or attenuating (in 30) the AC signal to the desired amplitude, and then converting (in 40) the AC signal back to a DC voltage. The output voltage may be adjusted (by 10) by altering the frequency of the AC signal also known as the switching frequency. A wide dynamic range is achieved at a narrow switching frequency bandwidth by inserting either a fourth or higher order low pass filter (30) or a notch filter at the output of the switching transistor (in 20). The high roll-off rate exhibited by either filter provides a relatively high dynamic range in a narrow frequency range.
摘要翻译： 用于将DC电压可变地转换为不同DC电压电平的装置包括具有宽输出电压动态范围的多谐振电子功率转换器（50）。 电力转换是通过将直流电压（1）转换为交流信号，将交流信号调整或衰减（在30）中达到所需幅度，然后将（40）交流信号转换回到 直流电压。 可以通过改变也被称为开关频率的AC信号的频率来调节输出电压（10）。 通过在开关晶体管（在20）的输出端插入第四或更高阶低通滤波器（30）或陷波滤波器，在窄的开关频率带宽下实现宽的动态范围。 任何一个滤波器表现的高滚降速率在窄频率范围内提供相对高的动态范围。
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公开(公告)号：EP0309867A2
公开(公告)日：1989-04-05
申请号：EP88115392.8
申请日：1988-09-20
CPC分类号： H02M3/338
摘要： 2.1. Bei einem Schaltnetzteil besteht die Gefahr, daß nach dem Einschalten bei Beginn der Steuerung des Schalttransistors (T1) der Transistor nicht einwandfrei gesperrt wird und am Transformator (Tr) Überspannungen auftreten.
2.2. Dies wird vermieden mit einer aus der Netzspannung (UN) über einen Gleichrichter (D1) gewonnenen negativen Vorspannung (-Uv), die im Sinne einer Sperrung des Schalttransistors (T1) an die Treiberschaltung (T2,T3) angelegt ist.
2.3. Insbesondere Schaltnetzteil für Fernsehempfänger, Videorecorder und Personal computer摘要翻译： 2.1。 在一个开关电源，存在的危险是，导通晶体管的开关晶体管（T1）的控制开始后没有正确锁定，并在变压器发生（TR）的过电压。 2.2。 这避免了与电源电压（UN）由整流器（D1）中的一个获得的负偏置电压（-Vs），其在所述开关晶体管（T1）到所述驱动器电路（T2，T3）的一个阻塞的意义上创建的。 2.3。 在电视接收机，录像机和个人电脑尤其是开关电源
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公开(公告)号：EP0081593B1
公开(公告)日：1988-08-17
申请号：EP82901791.2
申请日：1982-06-09
申请人： Hitachi, Ltd.
CPC分类号： H02M3/338 , G05F1/563 , H02M3/33507
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公开(公告)号：EP0257817A2
公开(公告)日：1988-03-02
申请号：EP87306681.5
申请日：1987-07-29
申请人： AT&T Corp.
发明人： Bowman, Wayne Clifton , Magalhaes, Frank Matthieu , Suiter, Weyman BlanchardJr , Ziesse, Norman Gerard
IPC分类号： H02M3/335
CPC分类号： H02M3/338 , H02M3/28 , H02M2007/4818 , Y02B70/1433 , Y02B70/1441
摘要： A self-oscillating power converter utilizes a MOSFET power transistor switch with its output electrode coupled to a tuned network that operatively limits the voltage waveform across the power switch to periodic unipolar pulses. The transistor switch may be operated at a high radio frequency so that its drain to gaste interelectrode capacitance is sufficient to comprise the sole oscillatory sustaining feedback path of the converter. A reactive network which is inductive at the operating frequency couples the gate to source electrodes of the transistor switch and includes a variable capacitance as a means of adjusting the overall reactance, and hence the converter's switching frequency in order to provide voltage regulation. A resonant rectifier includes a tuned circuit to shape the voltage waveform across the rectifying diodes as a time inverse of the power switch waveform. The input resistance of the rectifier is controlled so that it is invariant to frequency change within the switching frequency range of the converter but inversely proportional to the load resistance.
摘要翻译： 自振荡功率转换器利用MOSFET功率晶体管开关，其输出电极耦合到调谐网络，可操作地将电源开关两端的电压波形限制为周期性单极性脉冲。 晶体管开关可以以高射频操作，使得其漏极电极电容足以包括转换器的唯一振荡维持反馈路径。 在工作频率下感应的无功网络将晶体管开关的栅极耦合到源电极，并且包括可变电容作为调整整体电抗的装置，并因此提供转换器的开关频率以提供电压调节。 谐振整流器包括调谐电路，用于整流整流二极管中的电压波形，作为功率开关波形的时间倒数。 控制整流器的输入电阻，使其在变换器的开关频率范围内的频率变化不变，但与负载电阻成反比。
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公开(公告)号：EP0205642A1
公开(公告)日：1986-12-30
申请号：EP85107828
申请日：1985-06-24
申请人： THOMSON BRANDT GMBH
发明人： RILLY GERARD DR-ING
IPC分类号： H02M3/338
CPC分类号： H02M3/338 , H02M2001/0032 , Y02B70/1433 , Y02B70/16
摘要： DC-converter with a switch-mode power supply, in particular for continuously operating magnetrons of the type generally used in microwave ovens. By a special tuning of an oscillating circuit (16, 18) forming the control voltage for the switching transistor (9) it is achieved that the switching transistor off-time as well as its duty cycle can be varied within large ranges.
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公开(公告)号：EP0152421A1
公开(公告)日：1985-08-28
申请号：EP84902935.0
申请日：1984-08-09
CPC分类号： H02M3/338 , H02M7/5383 , Y02B70/1433 , Y02B70/1441
摘要： Un courant oscillatoire bidirectionnel est établi dans un circuit résonnant LC parallèle (L1, C1) à partir d'une source unidirectionnelle (Vi). Le courant bidirectionnel peut être établi à l'aide d'un commutateur de courant unique TR1 dont le fonctionnement est cyclique. Un dispositif de stockage et d'extraction d'énergie sous la forme d'un inducteur (TF) est connecté dans un chemin d'alimentation au circuit résonnant (L1, C1) et limite la vitesse de montée du courant dans le circuit résonnant lorsque le transistor TR1 est mis sous tension. Un transformateur (TR) effectue le couplage d'énergie sur un circuit de sortie (D1, C2) par conversion directe lorsque le transistor TR1 est mis sous tension. Lorsque le transistor TR1 est mis hors tension, l'énergie stockée dans (TF) s'écoule comme un courant dans un chemin d'extraction séparé et est renvoyée au circuit pour en améliorer son rendement. L'inducteur (TF) comprend avantageusement un transformateur de retour qui applique une énergie de retour à l'entrée ou à la sortie du circuit. Le circuit de sortie (D1, C2) joue le rôle d'un verrou de la tension lorsque le transformateur (TR) est en conversion directe, avec comme effet de verrouiller la tension sur (C1) à une valeur réfléchie de la tension sur (C2).
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