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1. 发明授权

US5952790A Lamp ballast circuit with simplified starting circuit 失效
标题翻译：灯镇流器电路具有简化启动电路
公开(公告)号：US5952790A
公开(公告)日：1999-09-14
申请号：US709064
申请日：1996-09-06
申请人： Louis R. Nerone , Gordon A. Grigor , Kurt W. Haas
发明人： Louis R. Nerone , Gordon A. Grigor , Kurt W. Haas
IPC分类号： H05B41/282 , H05B37/00
CPC分类号： H05B41/2825
摘要： A ballast circuit for a gas discharge lamp comprises a resonant load circuit incorporating the gas discharge lamp and including a resonant inductance and a resonant capacitance. A d.c.-to-a.c. converter circuit induces an a.c. current in the resonant load circuit. The converter circuit comprises first and second switches serially connected between a bus conductor at a d.c. voltage and a reference conductor, and which are connected together at a common node through which the a.c. load current flows. A voltage-breakover (VBO) device is effectively connected between the common node and a second node. A network is provided for setting the voltage of the second node with respect to the common node at less than the breakover voltage of the VBO device when the lamp is operating at steady state. A polarity-determining impedance is connected between the common node and one of the bus conductor and the reference conductor, to set the initial polarity of pulse to be generated upon the firing of the VBO device.
摘要翻译：用于气体放电灯的镇流器电路包括并入气体放电灯并包括谐振电感和谐振电容的谐振负载电路。一个d.c.到a.c。转换器电路引起一个直流谐振负载电路中的电流。转换器电路包括串联连接在总线导体之间的第一和第二开关。电压和参考导体，并且在公共节点处连接在一起，通过该通道负载电流流动。电压突破（VBO）器件有效地连接在公共节点和第二个节点之间。提供了一种网络，用于当灯处于稳定状态时，将该第二节点相对于公共节点的电压设置为小于该VBO装置的跳转电压。极性确定阻抗连接在公共节点和总线导体和参考导体中的一个之间，以设定在VBO装置点火时要产生的脉冲的初始极性。

2. 发明授权

US5712536A Reduced bus voltage integrated boost high power factor circuit 失效
标题翻译：降低总线电压集成升压高功率因数电路
公开(公告)号：US5712536A
公开(公告)日：1998-01-27
申请号：US509281
申请日：1995-07-31
申请人： Kurt W. Haas , David J. Kachmarik , Kelvin B. Belle
发明人： Kurt W. Haas , David J. Kachmarik , Kelvin B. Belle
IPC分类号： H05B41/28 , H02M5/458 , G05F1/70
CPC分类号： H05B41/28 , Y10S315/07
摘要： A condensed power supply circuit for powering a gas discharge lamp with bi-directional current reduces duty cycle by increasing dead time. The circuit comprises an arrangement for supplying d.c. power from an a.c. voltage, a series half bridge converter, a boost converter, a resistor-capacitor delay circuit associated with a gate to control dead time, and a snubber capacitance for facilitating zero voltage switching to fill the entire dead time. The series half-bridge converter alternately impresses a d.c. bus voltage from a bus conductor across a load circuit first with one polarity and then with an opposite polarity. The series half-bridge converter includes a first switch, a second switch, and a switching control circuit for alternately switching on the first and second switches. The boost converter comprises a boost capacitor, a boost inductor, and means for periodically connecting a load end of the boost inductor through a low impedance path to the ground conductor, thereby charging the boost inductor. The present invention reduces duty cycle via an increase in dead time. The resistor-capacitor delay circuit, associated with a gate, is used to control dead time. The snubber capacitance, which facilitates zero voltage switching to fill the entire dead time range, has a value set by the resistor-capacitor delay circuit.
摘要翻译：用于通过双向电流为气体放电灯供电的冷凝电源电路通过增加死区时间来减少占空比。该电路包括用于提供直流电的装置。来自a.c.的权力电压，串联半桥转换器，升压转换器，与栅极相关的电阻器 - 电容器延迟电路以控制死区时间，以及用于促进零电压切换以填充整个死区时间的缓冲电容。串联半桥转换器交替印象深刻。总线电压从总线导体穿过负载电路，首先具有一个极性，然后具有相反的极性。串联半桥转换器包括用于交替接通第一和第二开关的第一开关，第二开关和开关控制电路。升压转换器包括升压电容器，升压电感器和用于通过低阻抗路径周期性地将升压电感器的负载端连接到接地导体的装置，从而对升压电感器充电。本发明通过增加死区时间来减少占空比。与栅极相关的电阻 - 电容延迟电路用于控制死区时间。促进零电压切换以填充整个死区时间范围的缓冲电容具有由电阻 - 电容器延迟电路设置的值。

3. 发明授权

US5483125A Ballast circuit for a gas discharge lamp having a cathode pre-heat arrangement 失效
标题翻译：具有阴极预热布置的气体放电灯的镇流器电路
公开(公告)号：US5483125A
公开(公告)日：1996-01-09
申请号：US161844
申请日：1993-12-06
申请人： David J. Kachmarik , Louis R. Nerone , Michael M. Secen , Kurt W. Haas
发明人： David J. Kachmarik , Louis R. Nerone , Michael M. Secen , Kurt W. Haas
IPC分类号： H05B41/24 , H05B41/298 , H05B39/04
CPC分类号： H05B41/2988 , Y10S315/05
摘要： A ballast circuit for a gas discharge lamp, of the type having a pair of resistively heated cathodes that are resistively heated both during a cathode pre-heat period prior to lamp turn-on, and during steady state lamp operation, is disclosed. The ballast circuit includes circuitry for providing, on a bus conductor, a d.c. bus voltage with respect to a ground, and a converter, responsive to the d.c. bus voltage, for supplying bidirectional current to a resonant load circuit. The resonant load circuit includes the gas discharge lamp, a resonant capacitor coupled between the lamp cathodes such that its voltage varies with lamp voltage, and a resonant inductor serially coupled to the resonant capacitor and cooperating therewith to set a magnitude, and resonant frequency, of the bidirectional lamp current. Circuitry is provided for powering the resistively heated lamp cathodes, to thereby heat the cathodes. Further included is a circuit for maintaining the lamp voltage during a cathode pre-heat period below a predetermined level so as to prevent lamp turn-on during such period; such circuit includes circuitry for holding a first cathode of the lamp at a substantially constant voltage, and circuitry for clamping a second cathode of the lamp below the predetermined level. Such clamping circuitry includes a positive temperature coefficient (PTC) impedance device coupled to a second cathode of the lamp, and serially connected by a positively poled clamping diode to the bus conductor, and serially connected by a negatively poled clamping diode to the ground.
摘要翻译：公开了一种用于气体放电灯的镇流器电路，其具有在灯开启之前的阴极预热期间以及稳态灯操作期间电阻加热的一对电阻加热的阴极。镇流器电路包括用于在总线导体上提供直流电的电路。相对于地面的总线电压，以及响应于直流的转换器。总线电压，用于向谐振负载电路提供双向电流。谐振负载电路包括气体放电灯，耦合在灯阴极之间的谐振电容器，使得其电压随灯电压变化，以及串联耦合到谐振电容器的谐振电感器，并与其配合以设定幅度和谐振频率双向灯电流。提供电路用于对电阻加热的灯阴极供电，从而加热阴极。还包括一个电路，用于在阴极预热期间保持低于预定水平的灯电压，以防止在这样的时间段期间灯接通; 这种电路包括用于将灯的第一阴极保持在基本上恒定的电压的电路，以及将灯的第二阴极夹持在预定水平以下的电路。这种钳位电路包括耦合到灯的第二阴极的正温度系数（PTC）阻抗器件，并且通过正极钳位二极管串联连接到总线导体，并且由负极化的钳位二极管串联连接到地。

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