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公开(公告)号：US5262699A
公开(公告)日：1993-11-16
申请号：US939027
申请日：1992-09-01
申请人： Yiyoung Sun , Long T. Nguyen
发明人： Yiyoung Sun , Long T. Nguyen
IPC分类号： H05B41/285 , H05B37/02
CPC分类号： H05B41/2855 , Y02B20/19 , Y10S315/04 , Y10S315/05 , Y10S315/07
摘要： A circuit for starting and operating a discharge lamp, such as a compact fluorescent lamp, at high frequency from a 60 Hz AC supply. The circuit includes a DC power supply coupled to a pair of AC input terminals for generating a DC voltage. An oscillator coupled to the DC power supply includes a pair of semiconductor transistors and a drive transformer having a primary winding and at least one secondary winding. A load coupled to the output of the oscillator comprises a series combination of the primary winding of the drive transformer and a tank circuit including a tank inductor and a tank capacitor. Suitable means for connecting a discharge lamp in parallel with the tank capacitor is provided. An oscillator sensing and controlling circuit responsive to various lamp failure modes is coupled to the secondary winding of the transformer and reduces the output of the oscillator after a predetermined time delay by shunting the base of either one of the semiconductor switches of the oscillator. Upon replacement of the failed lamp, normal operation of the oscillator is resumed without having to disconnect the AC supply.
摘要翻译： 用于从60Hz AC电源以高频率启动和操作诸如紧凑型荧光灯的放电灯的电路。 电路包括耦合到一对AC输入端的DC电源，用于产生DC电压。 耦合到DC电源的振荡器包括一对半导体晶体管和具有初级绕组和至少一个次级绕组的驱动变压器。 耦合到振荡器的输出的负载包括驱动变压器的初级绕组和包括槽电感器和储能电容器的储能回路的串联组合。 提供了用于与放电电容器并联连接放电灯的合适装置。 响应于各种灯故障模式的振荡器感测和控制电路耦合到变压器的次级绕组，并且在预定时间延迟之后通过分流振荡器的任一个半导体开关的基极来减小振荡器的输出。 在更换故障灯时，恢复振荡器的正常操作，而无需断开交流电源。
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2.发明授权Fourth order damped lowpass filter for obtaining high power factor and low total harmonic distortion 失效四阶阻尼低通滤波器，用于获得高功率因数和低总谐波失真
公开(公告)号：US5148360A
公开(公告)日：1992-09-15
申请号：US828549
申请日：1992-01-29
申请人： Long T. Nguyen
发明人： Long T. Nguyen
CPC分类号： H02M1/4266 , H02M1/12 , Y02B70/123
摘要： An arrangement includes a network for connection between an AC power supply and the input of a DC power supply containing rectifiers and a filter capacitor. The network forms a fourth order, damped lowpass filter that waveshapes the AC input current so as to either reduce or remove the magnitude of harmonics which primarily cause distortion of the input current waveform. In one embodiment, the waveshaping network includes a tapped inductor connected in series with the input of the DC power supply. A series combination of a damping resistor and a first capacitor is connected in parallel with the series inductor. One end of a second capacitor is connected to the tap of the inductor. The waveshaping network increases the power factor and lowers the total harmonic distortion the input of the DC power supply presents to the AC power supply.
摘要翻译： 一种装置包括用于在AC电源和包含整流器和滤波电容器的DC电源的输入之间进行连接的网络。 该网络形成四阶阻尼低通滤波器，其对交流输入电流进行波形绘制，以便减小或消除主要导致输入电流波形失真的谐波幅度。 在一个实施例中，波形整形网络包括与DC电源的输入串联连接的抽头电感器。 阻尼电阻和第一电容的串联组合与串联电感并联。 第二电容器的一端连接到电感器的抽头。 波形网络增加了功率因数，降低了直流电源输入给交流电源的总谐波失真。
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公开(公告)号：US5138235A
公开(公告)日：1992-08-11
申请号：US664161
申请日：1991-03-04
申请人： Yiyoung Sun , Long T. Nguyen
发明人： Yiyoung Sun , Long T. Nguyen
IPC分类号： H05B41/24 , H05B41/298
CPC分类号： H05B41/2985 , Y02B20/19 , Y10S315/07
摘要： A circuit for starting and operating a discharge lamp, such as a compact fluorescent lamp, at high frequency from an 60 Hz AC supply. The circuit includes a power supply for generating a DC voltage coupled to a pair of AC input terminals. A DC/AC converter includes an oscillator having a pair of semiconductor switches coupled in parallel with the DC power supply. an oscillator starting circuit is coupled to one of the semiconductor switches and includes a series circuit comprising a resistor, capacitor and threshold element. The input of the oscillator starting circuit is coupled to one of the AC input terminals so as to prevent a momentary flicker in the lamp after the AC supply is removed and the lamp has extinguished. In accordance with another aspect of the invention, the oscillator includes fusible circuit elements which render the oscillator inoperable upon failure of the lamp due to depletion of emissive material on at least one of the lamp electrodes.
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公开(公告)号：US08009404B2
公开(公告)日：2011-08-30
申请号：US11962090
申请日：2007-12-21
CPC分类号： H02J1/108 , H02M2001/0045 , Y10T307/615 , Y10T307/625
摘要： A system is provided that effectively obviates shortcomings of conventional, diode-ORed, redundant power supply systems by forcing a primary power source to provide power to the system load most the time, even when the primary source provides a lower voltage than that of a secondary power source. This preferential selection of the lower-voltage primary is achieved by interposing a power switching unit between the secondary power source and the ORing diode in front of the load. The power switching unit of the illustrative embodiment comprises a voltage regulator that is regulated at a first voltage level, which is lower than the nominal output voltage level provided by the primary power source. Meanwhile, the primary power source is able to charge the secondary power source, which is a battery in the illustrative embodiment, so that the secondary power source can provide power to the load when the primary power source is either interrupted or falls below the first voltage level.
摘要翻译： 提供了一种系统，通过强制主电源为大部分时间向系统负载供电，从而有效地避免了传统的二极管等效冗余电源系统的缺点，即使主电源提供的电压低于次级电源的电压 能量源。 通过在二次电源和负载前面的ORing二极管之间插入功率开关单元来实现对低电压初级的优选选择。 说明性实施例的功率切换单元包括调节在低于由主电源提供的标称输出电压电平的第一电压电平的电压调节器。 同时，主电源能够对作为说明性实施例中的电池的次级电源进行充电，使得当主电源被中断或低于第一电压时，次级电源可以为负载提供电力 水平。
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公开(公告)号：US20100265628A1
公开(公告)日：2010-10-21
申请号：US11962090
申请日：2007-12-21
CPC分类号： H02J1/108 , H02M2001/0045 , Y10T307/615 , Y10T307/625
摘要： A system is provided that effectively obviates shortcomings of conventional, diode-ORed, redundant power supply systems by forcing a primary power source to provide power to the system load most the time, even when the primary source provides a lower voltage than that of a secondary power source. This preferential selection of the lower-voltage primary is achieved by interposing a power switching unit between the secondary power source and the ORing diode in front of the load. The power switching unit of the illustrative embodiment comprises a voltage regulator that is regulated at a first voltage level, which is lower than the nominal output voltage level provided by the primary power source. Meanwhile, the primary power source is able to charge the secondary power source, which is a battery in the illustrative embodiment, so that the secondary power source can provide power to the load when the primary power source is either interrupted or falls below the first voltage level.
摘要翻译： 提供了一种系统，通过强制主电源为大部分时间向系统负载供电，从而有效地避免了传统的二极管等效冗余电源系统的缺点，即使主电源提供的电压低于次级电源的电压 能量源。 通过在二次电源和负载前面的ORing二极管之间插入功率开关单元来实现对低电压初级的优选选择。 说明性实施例的功率切换单元包括调节在低于由主电源提供的标称输出电压电平的第一电压电平的电压调节器。 同时，主电源能够对作为说明性实施例中的电池的次级电源进行充电，使得当主电源被中断或低于第一电压时，次级电源可以为负载提供电力 水平。
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公开(公告)号：US07080804B2
公开(公告)日：2006-07-25
申请号：US10881148
申请日：2004-06-30
摘要： A weapons system is disclosed that provides hot-start navigational information to the Global-Positioning-System receivers on missiles prior to flight. The system comprises a Global-Positioning-System receiver that uses a classified red cryptographic key to decode the P(Y) signal from one or more of the Global-Positioning-System constellation of satellites. Once the P(Y) signal is decoded, one or more characteristics of the P(Y) signal is derived. These characteristics of the signal—and some other information including a black cryptographic key that comprises the red cryptographic key—are then provided to the Global-Positioning-System receivers on missiles prior to flight. By giving the missiles this information, the missiles are able to acquire the P(Y) signals, which enables them to determine their position more quickly than they otherwise could.
摘要翻译： 公开了一种武器系统，其在飞行前向导弹的全球定位系统接收机提供热启动导航信息。 该系统包括全球定位系统接收机，其使用分类的红色加密密钥来解码来自卫星的全球定位系统星座中的一个或多个的P（Y）信号。 一旦P（Y）信号被解码，则导出P（Y）信号的一个或多个特性。 然后，信号的这些特征以及包括红色加密密钥的黑色加密密钥的一些其他信息在飞行前在导弹上提供给全球定位系统接收机。 通过给导弹这个信息，导弹能够获取P（Y）信号，这使得它们能够比其他方式更快地确定它们的位置。
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公开(公告)号：US5148359A
公开(公告)日：1992-09-15
申请号：US812089
申请日：1991-12-23
申请人： Long T. Nguyen
发明人： Long T. Nguyen
CPC分类号： H02M1/4266 , H02M1/12 , Y02B70/123
摘要： An arrangement includes a network for connection between an AC power supply and the input of a DC power supply containing rectifiers and a filter capacitor. The network forms a third order, damped low-pass filter that waveshapes the AC input current so as to either reduce or remove the magnitude of harmonics which primarily cause distortion of the input current waveform. In a preferred embodiment, the waveshaping network includes an inductor connected in series with the input of the DC power supply. A series combination of a damping resistor and a first capacitor is connected in parallel with the series inductor. A second capacitor is connected in shunt with the input terminals of the DC power supply. The waveshaping network increases the power factor and lowers the total harmonic distortion the input of the DC power supply presents to the AC power supply.
摘要翻译： 一种装置包括用于在AC电源和包含整流器和滤波电容器的DC电源的输入之间进行连接的网络。 网络形成三阶阻尼低通滤波器，其对交流输入电流进行波形成形，以便减小或消除主要导致输入电流波形失真的谐波幅度。 在优选实施例中，波形整形网络包括与DC电源的输入串联连接的电感器。 阻尼电阻和第一电容的串联组合与串联电感并联。 第二电容器与直流电源的输入端子分流连接。 波形网络增加了功率因数，降低了直流电源输入给交流电源的总谐波失真。
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公开(公告)号：US5142202A
公开(公告)日：1992-08-25
申请号：US749813
申请日：1991-08-26
申请人： Yiyoung Sun , Long T. Nguyen
发明人： Yiyoung Sun , Long T. Nguyen
IPC分类号： H05B41/285
CPC分类号： H05B41/2855 , Y02B20/19 , Y10S315/05 , Y10S315/07
摘要： A circuit for starting and operating a discharge lamp, such as a compact fluorescent lamp, at high frequency from an 60 Hz AC supply. The circuit includes a DC power supply coupled to a pair of AC input terminals for generating a DC voltage. An oscillator coupled to the DC power supply includes a drive transformers having a primary winding. A load coupled to the output of the oscillator comprises a series combination of the primary winding of the drive transformer and a tank circuit including a tank inductor and a tank capacitor. Suitable means for connecting a discharge lamp in parallel with the tank capacitor is provided. A voltage sensing circuit responsive to failure of the lamp, is coupled to an oscillator controlling circuit which reduces the output of the oscillator after a predetermined time delay by shunting the drive transformer. Upon replacement of the failed lamp, normal operation of the oscillator is resumed without having to disconnect the AC supply.
摘要翻译： 用于从60Hz AC电源高频启动和操作诸如紧凑型荧光灯的放电灯的电路。 电路包括耦合到一对AC输入端的DC电源，用于产生DC电压。 耦合到DC电源的振荡器包括具有初级绕组的驱动变压器。 耦合到振荡器的输出的负载包括驱动变压器的初级绕组和包括槽电感器和储能电容器的储能回路的串联组合。 提供了用于与放电电容器并联连接放电灯的合适装置。 响应于灯故障的电压感测电路耦合到振荡器控制电路，其通过分流驱动变压器来在预定时间延迟之后减小振荡器的输出。 在更换故障灯时，恢复振荡器的正常操作，而无需断开交流电源。
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