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公开(公告)号：EP1397942A1
公开(公告)日：2004-03-17
申请号：EP02733077.8
申请日：2002-05-29
发明人： SHEN, Eric, B.
IPC分类号： H05B41/28 , H05B41/392 , H02M1/00
CPC分类号： H05B41/2885 , H02M5/4585 , H05B41/28 , Y02B20/202
摘要： A method and apparatus for driving a ballast in critical discontinuous mode (CDCM) is disclosed. The method provides for zero loss switching in order to maximize efficiency, and also provides controllable input and output power without the use of complex and costly feedback loops.
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2.发明授权
公开(公告)号：EP1419677B1
公开(公告)日：2006-03-29
申请号：EP02755492.2
申请日：2002-08-14
发明人： SHEN, Eric, B.
IPC分类号： H05B41/292 , H05B41/392
CPC分类号： H05B41/3928 , H05B41/2928 , Y02B20/202 , Y02B20/208
摘要： A method of color mixing with arc stability and arc straightening of HID lamps operated at high frequencies which modulates a duty cycle of a half bridge configured resonant inverter at a frequency which is substantially one-half the frequency of a frequency of a second longitudinal acoustic mode of the HID lamp. The method also sweeps the switching frequency in a high frequency range of such resonant inverter. The duty cycle modulation effectuates power modulation to create a fixed frequency power component which is substantially equal to the frequency of the second longitudinal acoustic mode. The sweeping switching frequency of the half bridge configured resonant inverter drives the HID lamp in a manner which effectuates arc stability and arc straightening.
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公开(公告)号：EP1474957A1
公开(公告)日：2004-11-10
申请号：EP02781520.8
申请日：2002-11-14
发明人： SHEN, Eric, B.
IPC分类号： H05B41/00
CPC分类号： H05B41/2888 , H05B41/2886 , Y02B20/202 , Y10T307/615
摘要： An electronic converter receiving low frequency input power, converting this power to DC power at a voltage greater than the input voltage peak, and providing output power from a commutator stage. Lossless switching of the power semiconductor devices in the input stage is achieved by turning each device on at an instant when voltage across the device's current terminals is zero. Current through a main inductor of the input circuit is triangular and substantially unidirectional for at least a few high frequency cycles. To ensure lossless switching, current through the main inductor of the input circuit may be reversed briefly before switching. For use as an electronic arc lamp ballast, the commutator stage also uses lossless switching, and substantially unidirectional triangular current through an output inductor is reversed periodically.
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公开(公告)号：EP1327381B1
公开(公告)日：2006-08-09
申请号：EP01986836.3
申请日：2001-10-04
发明人： SHEN, Eric, B.
IPC分类号： H05B41/288
CPC分类号： H05B41/2887 , H05B41/382 , Y02B20/202 , Y02B20/204
摘要： An improved circuit arrangement for igniting and operating a high intensity discharge (HID) lamp is disclosed. The ignition voltage is provided across a single capacitor, and at the end of the ignition phase, a second capacitor is switched into the circuit to divide the voltage across two capacitors, and provide a steady state square wave current and voltage.
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公开(公告)号：EP1433365A1
公开(公告)日：2004-06-30
申请号：EP02765195.9
申请日：2002-09-06
发明人： SHEN, Eric, B.
IPC分类号： H05B41/38 , H05B41/288
CPC分类号： H05B41/2888 , H05B41/388 , Y02B20/202 , Y10S315/07
摘要： An electronic ballast with lamp run-up current regulation. In one aspect, the electronic ballast comprises an input stage coupled to an AC source, the input stage converting an AC voltage to a direct current bus voltage, an output stage having inputs coupled to the bus voltage and outputs connected to a lamp, the output stage providing (i) power to the lamp so as to produce a lamp voltage and lamp current in a steady state mode of operation, and (ii) a lamp run-up current to the lamp during a run-up phase of the operation of the lamp, and a current regulation circuit for regulating the lamp run-up current so that the lamp run-up current exceeds a steady state lamp current value, and increases if either the bus voltage increases or the lamp voltage decreases. The output circuit comprises a main high-frequency switching inductor through which an inductor current flows wherein the lamp current is based upon the inductor current. In one embodiment, the current regulating circuitry further includes current limiting circuitry for limiting the lamp run-up-current to a predetermined value. In another embodiment, the current regulating circuitry further comprises a feedback circuit that adjusts the magnitude of the lamp run-up-current in accordance with the magnitude of the bus voltage. In a further embodiment, the current regulating circuit further comprises circuitry for limiting the magnitude of the inductor current at the moment of commutation.
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公开(公告)号：EP1411754A1
公开(公告)日：2004-04-21
申请号：EP03104555.2
申请日：2000-10-10
发明人： SHEN, Eric, B. , BRUNING, Gert, W.
IPC分类号： H05B41/28 , H05B41/288
CPC分类号： H05B41/2885 , H02M5/4585 , H05B41/28 , H05B41/282 , H05B41/288 , Y02B20/183 , Y02B20/202
摘要： An electronic ballast circuit for driving a gas discharge lamp from a mains voltage signal supply includes a ballast bridge unit that has an upper and lower signal line. A storage capacitor is coupled across the bridge unit. The bridge unit also includes an input converter bridge having at least two switches coupled in series at an input common terminal, wherein the upper switch is coupled to the upper signal line of the ballast bridge unit and the lower switch is coupled to the lower signal line. The ballast bridge also includes an output converter bridge having at least two switches coupled in series at an output common terminal. A reference voltage signal bridge in the ballast bridge unit includes at least two switches coupled in series at a reference voltage common terminal, so as to form a first differential voltage signal between the common input terminal and the reference voltage common terminal and a second differential voltage signal between the common output terminal and the reference voltage common terminal.
摘要翻译： 输入和输出转换器桥具有在输入和输出公共端子（134,138）处串联耦合的开关（106,108和116,128）。 参考电压信号桥具有在参考电压公共端串联耦合的开关（110,112）。 开关（110,112）与其间具有存储电容器（114）的信号线（118,120）耦合，以在端子（134,138）和参考端子之间形成差分电压信号。 输入转换器桥的上开关（106）耦合到镇流器桥单元的上信号线（118），下开关（108）耦合到该单元的下信号线（120）。 输出转换器桥的上部开关（116）耦合到镇流器桥单元的上部信号线（118），而下部开关（128）耦合到该单元的下部信号线（120）。
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公开(公告)号：EP1273210A1
公开(公告)日：2003-01-08
申请号：EP01917114.9
申请日：2001-03-22
发明人： LI, Faye , SHEN, Eric, B.
IPC分类号： H05B41/28 , H05B41/288
CPC分类号： H05B41/2885 , H05B41/28 , H05B41/2886 , H05B41/2888 , Y02B20/202
摘要： An electronic ballast for a high intensity discharge lamp combines the functions of a boost converter and a buck converter and combines the line voltage rectification with the load commutation. With such a configuration, only one controller is required, and the control signal for the controller is taken off a resistor in series with the bus capacitor. As such, the lamp power is indirectly controlled by regulating the input buck current to the buck converter portion, instead of by measuring the lamp current and it achieves high power factor when boost works in discontinuous mode.
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公开(公告)号：EP1397942B1
公开(公告)日：2008-02-27
申请号：EP02733077.8
申请日：2002-05-29
发明人： SHEN, Eric, B.
IPC分类号： H05B41/28 , H05B41/392 , H02M1/00
CPC分类号： H05B41/2885 , H02M5/4585 , H05B41/28 , Y02B20/202
摘要： A method and apparatus for driving a ballast in critical discontinuous mode (CDCM) is disclosed. The method provides for zero loss switching in order to maximize efficiency, and also provides controllable input and output power without the use of complex and costly feedback loops.
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9.发明公开METHOD FOR COLOR MIXING OF HID LAMPS OPERATED AT VHF FREQUENCIES USING DUTY CYCLE MODULATION 审中-公开METHOD FOR混色与占空比调制放电的高频供电灯高强度
公开(公告)号：EP1423993A1
公开(公告)日：2004-06-02
申请号：EP02753173.0
申请日：2002-08-02
发明人： SHEN, Eric, B.
IPC分类号： H05B41/292 , H05B41/392
CPC分类号： H05B41/3928 , H05B41/2928 , Y02B20/202 , Y02B20/208
摘要： A method of color mixing a very high frequency operated HID lamp which effectuates power modulation to the HID lamp at a frequency of the second longitudinal acoustic mode by modulating the duty cycle of a half bridge configured resonant inverter. The duty cycle is modulated with a modulation frequency which is substantially one-half the frequency of the second longitudinal acoustic mode of the HID lamp. In operation, exciting the second longitudinal acoustic mode of the HID lamp with the half bridge configured resonant inverter operated with a modulated duty cycle achieves color mixing along a vertical axis of the HID lamp.
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公开(公告)号：EP1419677A1
公开(公告)日：2004-05-19
申请号：EP02755492.2
申请日：2002-08-14
发明人： SHEN, Eric, B.
IPC分类号： H05B41/292 , H05B41/392
CPC分类号： H05B41/3928 , H05B41/2928 , Y02B20/202 , Y02B20/208
摘要： A method of color mixing with arc stability and arc straightening of HID lamps operated at high frequencies which modulates a duty cycle of a half bridge configured resonant inverter at a frequency which is substantially one-half the frequency of a frequency of a second longitudinal acoustic mode of the HID lamp. The method also sweeps the switching frequency in a high frequency range of such resonant inverter. The duty cycle modulation effectuates power modulation to create a fixed frequency power component which is substantially equal to the frequency of the second longitudinal acoustic mode. The sweeping switching frequency of the half bridge configured resonant inverter drives the HID lamp in a manner which effectuates arc stability and arc straightening.
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