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公开(公告)号：EP0565670B1
公开(公告)日：1998-02-11
申请号：EP92922041.6
申请日：1992-10-02
发明人： MOISIN, Mihail, S.
CPC分类号： H05B41/3925 , H05B41/2853 , H05B41/2986 , Y10S315/07
摘要： A circuit for dimmably driving fluorescent lamps (102, 104, 106) from a DC supply voltage includes: input nodes (174, 176) having input capacitors (184, 186) connected therebetween; a half-bridge transistor inverter (178, 180) connected between the input terminals; a series-resonant LC oscillator (196, 198) coupled in series between the half-bridge transistors and the input capacitors; an output transformer (212) having a primary winding (214) connected in series with the LC inductor (196) and in parallel with the LC capacitor (198) and a secondary winding (216) for connection to the lamp load; and first and second voltage clamp diodes (215A, 215B) connected between an intermediate point on the primary winding and the input nodes respectively. The voltage clamp diodes, in conjunction with the input capacitors, provide significant enhancement in reduction of power transferred to the lamps when the DC supply voltage is reduced, allowing lamp dimming to be simply and efficiently effected by reduction of the DC supply voltage.
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公开(公告)号：EP0698336A4
公开(公告)日：1997-10-22
申请号：EP95910147
申请日：1995-02-01
IPC分类号： H05B41/285 , H05B41/392 , H05B37/00
CPC分类号： H05B41/2855 , H05B41/3925 , Y10S315/04
摘要： A ballast circuit uses an optocoupler (140) to provide electrical isolation of the dimming control (152) from the remainder of the ballast. The optocoupler (140) is operated in the linear range to provide continuous dimming of the lamps. The circuit further uses a combination of diodes and a diode bridge (206) to steer current from the current sensor during the lamp out conditions so that the inverter (100) will maintain operation at a low frequency, thereby maximizing the output voltage. A clamp winding is used to insure that the voltage does not exceed the DC rail voltage.
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公开(公告)号：EP0689757A4
公开(公告)日：1996-05-15
申请号：EP95902456
申请日：1994-11-09
发明人： SHACKLE PETER W
CPC分类号： H05B41/28 , H02M2001/4275 , Y02B70/126 , Y10S315/05
摘要： A parallel resonant circuit (310, 330) for powering a gas discharge lamp (380) achieves power factor correction by using a floating power supply (200, 400, 390) having adjustable voltage and impedance level. The floating power supply is powered by a transformer and placed in series with the rectified AC power line.
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公开(公告)号：EP0698336A1
公开(公告)日：1996-02-28
申请号：EP95910147.0
申请日：1995-02-01
IPC分类号： H05B41
CPC分类号： H05B41/2855 , H05B41/3925 , Y10S315/04
摘要： A ballast circuit uses an optocoupler (140) to provide electrical isolation of the dimming control (152) from the remainder of the ballast. The optocoupler (140) is operated in the linear range to provide continuous dimming of the lamps. The circuit further uses a combination of diodes and a diode bridge (206) to steer current from the current sensor during the lamp out conditions so that the inverter (100) will maintain operation at a low frequency, thereby maximizing the output voltage. A clamp winding is used to insure that the voltage does not exceed the DC rail voltage.
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5.发明公开Circuit for quickly energizing electronic ballast 失效Schaltung zum Betreiben eines elektronischenVerschaltgerätesohneVerzögerung
公开(公告)号：EP0691799A2
公开(公告)日：1996-01-10
申请号：EP95109442.4
申请日：1995-06-19
IPC分类号： H05B41/29
CPC分类号： H05B41/2828
摘要： An electronic ballast having a boot strap capacitor (22) that becomes initially charged at a first rate and a high voltage storage capacitor (23) that becomes charged at a second, faster rate, wherein the boot strap capacitor (22), becoming initially fully charged initiates operation of a PWM driver (18) that in turn causes a power factor corrector and inverter (16) to energize corresponding gas discharge lamps (11). Upon activation of the PWM driver (18) and the corresponding activation of the power factor corrector and inverter (16), a voltage clamp (19) responds to these events by establishing a conductive path (20) between the high voltage storage capacitor (23) and the boot strap capacitor (22), such that continued operation of the PWM driver (18) is ensured. So configured, a relatively small valued capacitor can be utilized for the boot strap capacitor (22), thereby ensuring rapid activation of the lamps (11) without risking subsequent sporadic energization or other operational difficulties.
摘要翻译： 一种电子镇流器，其具有开始以第一速率充电的起吊电容器（22）和以第二较快速率充电的高压存储电容器（23），其中所述引导电容器（22）初始地完全 充电启动PWM驱动器（18）的操作，该PWM驱动器又使功率因数校正器和逆变器（16）激励相应的气体放电灯（11）。 在激活PWM驱动器（18）和功率因数校正器和逆变器（16）的相应激活时，电压钳位器（19）通过在高电压存储电容器（23）之间建立导电路径（20）来响应这些事件 ）和引导电容器（22），从而确保PWM驱动器（18）的连续操作。 如此配置，相对较小的电容器可以用于引导电容器（22），从而确保灯（11）的快速启动，而不会发生随后的零星通电或其他操作困难。
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公开(公告)号：EP0669074A1
公开(公告)日：1995-08-30
申请号：EP94926483.0
申请日：1994-08-08
IPC分类号： H05B41
CPC分类号： H05B41/2851 , Y10S315/05 , Y10S315/07
摘要： A ballast circuit (100) includes a ground fault detector (200). The ballast circuit is arranged for coupling to a power source (101) and a load (135, 137), the power source characterized by a source frequency, the ballast circuit including an electromagnetic interference ('EMI') filter (110) which includes a ground terminal (145). The ground fault detector (200) determines when the load is coupled to a ground fault (141) by detecting the presence of a high-frequency current at the ground terminal, the high-frequency current characterized by a frequency that is substantially greater than the source frequency. When the high-frequency current is detected, the ground fault detector provides an output signal (150) which may be used to disconnect the load from the ballast circuit.
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公开(公告)号：EP0636304A4
公开(公告)日：1995-06-07
申请号：EP94907270
申请日：1994-01-25
发明人： SHACKLE PETER W , KONOPKA JOHN G
IPC分类号： H05B41/282 , H02M1/00 , H02M1/42 , H05B41/28 , H05B41/285 , H05B41/26
CPC分类号： H02M1/425 , H02M2001/4275 , H05B41/28 , H05B41/2855 , Y02B70/126
摘要： A circuit for powering a gas discharge lamp from a source of a first frequency AC power has a first rectifier (104) for converting the first frequency AC power into a first DC power, a capacitor (108) and driver (110) for converting the DC power to a second frequency AC power. A second rectifier (106) is used to increase the power factor for the circuit. A control (136) is provided to disable the second rectifier if the lamp is removed from the circuit.
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公开(公告)号：EP0636304A1
公开(公告)日：1995-02-01
申请号：EP94907270.0
申请日：1994-01-25
CPC分类号： H02M1/425 , H02M2001/4275 , H05B41/28 , H05B41/2855 , Y02B70/126
摘要： A circuit for powering a gas discharge lamp from a source of a first frequency AC power has a first rectifier (104) for converting the first frequency AC power into a first DC power, a capacitor (108) and driver (110) for converting the DC power to a second frequency AC power. A second rectifier (106) is used to increase the power factor for the circuit. A control (136) is provided to disable the second rectifier if the lamp is removed from the circuit.
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公开(公告)号：EP0574554A1
公开(公告)日：1993-12-22
申请号：EP92915617.0
申请日：1992-03-06
发明人： MOISIN, Mihail, S.
IPC分类号： H05B41
CPC分类号： H05B41/282 , Y02B20/183
摘要： L'invention se rapporte à un circuit (500) servant à fournir le courant d'excitation à des lampes à décharge de gaz connectées en série depuis un enroulement secondaire de transformateur (528) connecté en un premier (529A) et en un second (529B) point respectivement à une première (508) et une seconde (514) borne de sortie sur la ligne d'alimentation des lampes. Un condensateur (532) assure le couplage du premier point avec une borne de sortie intermédiaire (512). La tension de pré-allumage produite dans l'enroulement secondaire est appliquée dans une seule lampe (506) pour produire son allumage. Après l'allumage, le courant dirigé vers la borne de sortie intermédiaire (512) est limité par le condensateur (532) et les lampes sont excitées en série. Ainsi, la tension qu'il faut produire dans l'enroulement secondaire pour assurer l'allumage de toutes les lampes est réduite. Dans une variante, les bornes de sortie sur la ligne d'alimentation des lampes peuvent être connectées en des points de l'enroulement secondaire qui sont plus éloignés que les premier et second points (Fig. 6) ou qui sont situés entre les premier et second points (Figs. 1-4).
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公开(公告)号：EP0565670A1
公开(公告)日：1993-10-20
申请号：EP92922041.0
申请日：1992-10-02
发明人： MOISIN, Mihail, S.
IPC分类号： H05B41
CPC分类号： H05B41/3925 , H05B41/2853 , H05B41/2986 , Y10S315/07
摘要： Un circuit de commande par atténuation de lampes fluorescentes (102, 104, 106) au moyen d'une tension d'alimentation en courant continu comprend: des noeuds d'entrée (174, 176) entre lesquels sont connectés des condensateurs d'entrée (184, 186); un onduleur en demi-pont à transistors (178, 180) connectés entre les bornes d'entrée; un oscillateur pilote à capacité-inductance résonnant en série (196, 198) couplé en série entre les transistors en demi-pont et les condensateurs d'entrée; un transformateur de sortie (212) présentant un enroulement primaire (214) connecté en série à l'inducteur à capacité-inductance (196) et en parallèle avec le condensateur à capacité-inductance (198), et un enroulement secondaire (216) assurant la connexion à la charge de la lampe; ainsi que des première et seconde diodes de blocage de tension (215A, 215B) connectées entre un point intermédiaire situé sur l'enroulement primaire et les noeuds d'entrée respectivement. Les diodes de blocage de tension, conjointement avec les condensateurs d'entrée, améliorent sensiblement la réduction du transfert de puissance aux lampes lorsque la tension d'alimentation en courant continu est réduite, ce qui permet d'obtenir une variation de la lampe de manière simple et efficace par réduction de la tension d'alimentation en courant continu.
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