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1.发明申请Optimal Trajectory Control for LLC Resonant Converter for LED PWM Dimming 有权用于LED PWM调光的LLC谐振转换器的最佳轨迹控制公开(公告)号：US20140312789A1
公开(公告)日：2014-10-23
申请号：US14140008
申请日：2013-12-24
Applicant: Virginia Tech Intellectual Properties, Inc.
Inventor： Weiyi Feng , Fred C. Lee , Shu Ji
CPC classification number: H02M3/33507 , H02M3/33561 , H02M3/337 , H02M2001/0058 , H05B33/0815 , H05B33/0827 , Y02B70/1433 , Y02B70/1491
Abstract: Pulse width modulation is provided for controlling a resonant power converter, particularly for dimming of light emitting diode arrays without loss of efficiency. Dynamic oscillation due to the beginning of a pulse width modulated pulse burst is limited by shortening of the first and/or last pulse of a pulse bust such that the first pulse of a subsequent pulse burst close to or to connect with a full load steady-state voltage/current trajectory of the power converter. Pulse shortening made be made substantially exact to virtually eliminate dynamic oscillation but substantial reduction in dynamic oscillation is provided if inexact or even performed randomly.
Abstract translation: 提供脉宽调制用于控制谐振功率转换器，特别是用于调光发光二极管阵列而不损失效率。 由于脉冲宽度调制脉冲串的开始而产生的动态振荡受到脉冲胸部的第一和/或最后脉冲的缩短的限制，使得后续脉冲的第一脉冲突然接近或与全负载稳态连接， 电源转换器的状态电压/电流轨迹。 基本上精确地实现脉冲缩短以实质上消除动态振荡，但是如果不精确或甚至随机地执行，则提供动态振荡的显着降低。
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Patent Agency Ranking
2.发明申请公开(公告)号：US20130285565A1
公开(公告)日：2013-10-31
申请号：US13930200
申请日：2013-06-28
Applicant: Virginia Tech Intellectual Properties, Inc.
Inventor： Weiyi Feng , Fred C. Lee
CPC classification number: H05B33/0839 , H02M3/335 , H05B33/0815 , H05B33/0851 , Y02B20/347
Abstract: A multi-channel constant current source particularly suitable for driving an array of light-emitting diodes as an illumination apparatus provides a power source stage voltage regulator for providing a variable voltage using pulse width modulation as an input to a plurality of constant current driver channels to regulate the constant current provided. Pulse width modulation thus allows both the power source stage and the constant current driver operating frequencies to be decoupled and individually optimized to maintain efficiency while emulating dimming effects of, for example, incandescent bulbs, over a full range of light output flux. Pulse width modulation can also be employed in the constant current channel drivers to avoid chromaticity shift during dimming.
Abstract translation: 特别适用于驱动发光二极管阵列作为照明装置的多通道恒流源提供电源级电压调节器，用于使用脉冲宽度调制提供可变电压作为多个恒定电流驱动器通道的输入， 调节提供的恒定电流。 因此，脉冲宽度调制允许功率源级和恒定电流驱动器工作频率两者被解耦并分别优化，以在模拟全光范围的光输出通量的同时模拟例如白炽灯泡的调光效果的同时保持效率。 在恒流通道驱动器中也可采用脉冲宽度调制，以避免调光过程中的色度偏移。
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3.发明授权公开(公告)号：US09000673B2
公开(公告)日：2015-04-07
申请号：US13930200
申请日：2013-06-28
Applicant: Virginia Tech Intellectual Properties, Inc.
Inventor： Weiyi Feng , Fred C. Lee
CPC classification number: H05B33/0839 , H02M3/335 , H05B33/0815 , H05B33/0851 , Y02B20/347
Abstract: A multi-channel constant current source particularly suitable for driving an array of light-emitting diodes as an illumination apparatus provides a power source stage voltage regulator for providing a variable voltage using pulse width modulation as an input to a plurality of constant current driver channels to regulate the constant current provided. Pulse width modulation thus allows both the power source stage and the constant current driver operating frequencies to be decoupled and individually optimized to maintain efficiency while emulating dimming effects of, for example, incandescent bulbs, over a full range of light output flux. Pulse width modulation can also be employed in the constant current channel drivers to avoid chromaticity shift during dimming.
Abstract translation: 特别适用于驱动发光二极管阵列作为照明装置的多通道恒流源提供电源级电压调节器，用于使用脉冲宽度调制提供可变电压作为多个恒定电流驱动器通道的输入， 调节提供的恒定电流。 因此，脉冲宽度调制允许功率源级和恒定电流驱动器工作频率两者被解耦并分别优化，以在模拟全光范围的光输出通量的同时模拟例如白炽灯泡的调光效果的同时保持效率。 在恒流通道驱动器中也可采用脉冲宽度调制，以避免调光过程中的色度偏移。
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4.发明申请公开(公告)号：US20140313790A1
公开(公告)日：2014-10-23
申请号：US14087076
申请日：2013-11-22
Applicant: Virginia Tech Intellectual Properties, Inc.
Inventor： Weiyi Feng , Fred C. Lee
IPC: H02M1/36
CPC classification number: H02M1/36 , H02M3/3376 , H02M2001/0058 , Y02B70/1433 , Y02B70/1491
Abstract: By setting switching instants of a switching circuit of a resonant power converter based on current in a resonant circuit reaching a current limit of a current limitation band, soft start-up of the power converter can be achieved to avoid or limit electrical stress with full control over a trade-off between time required to settle to a full load steady-state mode of operation and the amount of electrical stress permitted while soft start up switching frequency is automatically optimized.
Abstract translation: 通过基于达到电流限制带的电流限制的谐振电路中的电流来设置谐振功率转换器的开关电路的开关时刻，可以实现功率转换器的软启动，以完全控制以避免或限制电应力 在软启动切换频率自动优化的同时，在满足稳定状态运行所需的时间和允许的电压之间进行权衡。
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5.发明授权公开(公告)号：US09318946B2
公开(公告)日：2016-04-19
申请号：US14087076
申请日：2013-11-22
Applicant: Virginia Tech Intellectual Properties, Inc.
Inventor： Weiyi Feng , Fred C. Lee
CPC classification number: H02M1/36 , H02M3/3376 , H02M2001/0058 , Y02B70/1433 , Y02B70/1491
Abstract: By setting switching instants of a switching circuit of a resonant power converter based on current in a resonant circuit reaching a current limit of a current limitation band, soft start-up of the power converter can be achieved to avoid or limit electrical stress with full control over a trade-off between time required to settle to a full load steady-state mode of operation and the amount of electrical stress permitted while soft start up switching frequency is automatically optimized.
Abstract translation: 通过基于达到电流限制带的电流限制的谐振电路中的电流来设置谐振功率转换器的开关电路的开关时刻，可以实现功率转换器的软启动，以完全控制以避免或限制电应力 在软启动切换频率自动优化的同时，在满足全负载稳态运行模式所需的时间和允许的电压应力之间进行权衡。
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6.发明授权Optimal trajectory control for LLC resonant converter for LED PWM dimming 有权用于LED PWM调光的LLC谐振变换器的最佳轨迹控制公开(公告)号：US09276480B2
公开(公告)日：2016-03-01
申请号：US14140008
申请日：2013-12-24
Applicant: Virginia Tech Intellectual Properties, Inc.
Inventor： Weiyi Feng , Fred C. Lee , Shu Ji
CPC classification number: H02M3/33507 , H02M3/33561 , H02M3/337 , H02M2001/0058 , H05B33/0815 , H05B33/0827 , Y02B70/1433 , Y02B70/1491
Abstract: Pulse width modulation is provided for controlling a resonant power converter, particularly for dimming of light emitting diode arrays without loss of efficiency. Dynamic oscillation due to the beginning of a pulse width modulated pulse burst is limited by shortening of the first and/or last pulse of a pulse bust such that the first pulse of a subsequent pulse burst close to or to connect with a full load steady-state voltage/current trajectory of the power converter. Pulse shortening made be made substantially exact to virtually eliminate dynamic oscillation but substantial reduction in dynamic oscillation is provided if inexact or even performed randomly.
Abstract translation: 提供脉宽调制用于控制谐振功率转换器，特别是用于调光发光二极管阵列而不损失效率。 由于脉冲宽度调制脉冲串的开始而产生的动态振荡受到脉冲胸部的第一和/或最后脉冲的缩短的限制，使得后续脉冲的第一脉冲突然接近或与全负载稳态连接， 电源转换器的状态电压/电流轨迹。 基本上精确地实现脉冲缩短以实质上消除动态振荡，但是如果不精确或甚至随机地执行，则提供动态振荡的显着降低。
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