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公开(公告)号：US09385598B2
公开(公告)日：2016-07-05
申请号：US14303068
申请日：2014-06-12
CPC分类号： H02M3/156 , H05B33/0815 , Y02B20/346
摘要： A low voltage lamp includes a boost converter stage and a load. The load may include low voltage light producing elements including low voltage light emitting diodes. The boost converter stage receives an electronic transformer output and includes an inductor coupled to a switch and a switch controller that receives one or more controller inputs. Inductor current may be returned to the transformer when the switch is closed and provided to a rectifier coupled to the load when the switch is open. Controller inputs may include a transformer input that receives the transformer output, a sense input indicating switch current, and a load input indicating load voltage. Controller logic may synchronize assertions of a control signal for the switch with edge transitions of the transformer output to maintain peak inductor current within a specified range and to selectively transfer stored energy in the inductor to the load or back to the transformer.
摘要翻译： 低压灯包括升压转换器级和负载。 负载可以包括低电压发光元件，包括低电压发光二极管。 升压转换器级接收电子变压器输出并且包括耦合到开关的电感器和接收一个或多个控制器输入的开关控制器。 当开关关闭时，电感电流可以返回到变压器，当开关打开时，电感电流提供给耦合到负载的整流器。 控制器输入可以包括接收变压器输出的变压器输入，指示开关电流的感测输入和指示负载电压的负载输入。 控制器逻辑可以使开关的控制信号的断言与变压器输出的边沿跃迁同步，以将峰值电感器电流保持在指定范围内，并有选择地将存储在电感器中的能量转移到负载或返回到变压器。
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公开(公告)号：US09502984B2
公开(公告)日：2016-11-22
申请号：US14701791
申请日：2015-05-01
发明人： John L. Melanson , Zhaohui He
CPC分类号： H02M3/33507 , H02M3/33523 , H02M2001/0003 , H02M2001/007 , H05B33/0815 , Y02B20/346
摘要： An electronic system includes a controller to provide at least dual-mode conduction control of a switching power converter. In at least one embodiment, the controller is capable to control transitions between discontinuous conduction mode (DCM) and critical conduction mode (CRM) of the switching power converter using a measured switching time parameter having a value corresponding with an approximately peak voltage of a time-varying supply voltage supplied to the switching power converter. In at least one embodiment, the controller dynamically compensates for changing parameters of the electronic system by dynamically determining a minimum non-conductive time of the control switch of the switching power converter using the measured switching time parameter value at approximately the peak of the supply voltage of the supply voltage.
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3.发明授权Isolation of secondary transformer winding current during auxiliary power supply generation 有权在辅助电源发生期间隔离次级变压器绕组电流公开(公告)号：US09484832B2
公开(公告)日：2016-11-01
申请号：US13715451
申请日：2012-12-14
CPC分类号： H02M3/33507 , H02M1/4258 , H02M1/44 , H02M3/33523 , H02M3/33561 , H02M3/33576 , H02M5/2576 , H02M7/217 , H02M2001/0006 , H02M2001/0048 , H05B33/0815 , H05B33/0845 , H05B37/02 , Y02B20/346 , Y02B20/347 , Y02B70/126 , Y02B70/1491
摘要： An electronic system and method include a controller to actively control power transfer from a primary winding of a switching power converter to an auxiliary-winding of an auxiliary power supply. The switching power converter is controlled and configured such that during transfer of power to the auxiliary-winding, the switching power converter does not transfer charge to one or more secondary-windings of the switching power converter. Thus, the switching power converter isolates one or more secondary transformer winding currents from an auxiliary-winding current. By isolating the charge delivered to the one or more secondary-windings from charge delivered to the auxiliary-winding, the controller can accurately determine an amount of charge delivered to the secondary-windings and, thus, to a load.
摘要翻译： 电子系统和方法包括控制器，用于主动地控制从开关功率转换器的初级绕组到辅助电源的辅助绕组的功率传递。 开关电源转换器被控制和配置为使得在向辅助绕组传递电力时，开关功率转换器不将电荷传送到开关功率转换器的一个或多个次级绕组。 因此，开关功率转换器将一个或多个次级变压器绕组电流与辅助绕组电流隔离。 通过将输送到一个或多个次级绕组的电荷从传送到辅助绕组的电荷隔离，控制器可以精确地确定输送到次级绕组的电荷量，从而准确地确定负载。
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公开(公告)号：US09426866B2
公开(公告)日：2016-08-23
申请号：US14676449
申请日：2015-04-01
发明人： John L. Melanson , John J. Paulos
CPC分类号： H05B37/0209 , H05B33/0809 , H05B33/0848 , H05B37/02
摘要： A system and method map dimming levels of a lighting dimmer to light source control signals using a predetermined lighting output function. The dimmer generates a dimmer output signal value. At any particular period of time, the dimmer output signal value represents one of multiple dimming levels. In at least one embodiment, the lighting output function maps the dimmer output signal value to a dimming value different than the dimming level represented by the dimmer output signal value. The lighting output function converts a dimmer output signal values corresponding to measured light levels to perception based light levels. A light source driver operates a light source in accordance with the predetermined lighting output function. The system and method can include a filter to modify at least a set of the dimmer output signal values prior to mapping the dimmer output signal values to a new dimming level.
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公开(公告)号：US09515485B1
公开(公告)日：2016-12-06
申请号：US13926298
申请日：2013-06-25
发明人： William A. Draper , John L. Melanson , Zhaohui He
CPC分类号： H02J1/10 , H02J7/345 , H02J9/00 , H02J9/04 , H02J2001/006
摘要： A power control system provides immunity from power supply dropout for a controller without compromising a startup time of the controller. In at least one embodiment, the power control system includes separate startup and dropout immunity capacitors. In at least one embodiment, selection of the capacitance of the startup capacitor is independent of selection of the capacitance of the dropout immunity capacitance. In at least one embodiment, the startup capacitance can be minimized to provide sufficient energy for the controller to normally operate during one missed cycle of an input voltage and, thus, provide a minimum startup time for the controller. The capacitance of the dropout immunity capacitor can be maximized to provide sufficient energy for the controller to operate normally during a time period longer than one cycle of the input voltage.
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公开(公告)号：US09504111B2
公开(公告)日：2016-11-22
申请号：US14560330
申请日：2014-12-04
发明人： Eric King , John L. Melanson
CPC分类号： H05B33/0845 , G01R23/02 , H05B33/0815 , Y02B20/346
摘要： A line-frequency determining circuit for coupling to the output of a thyristor-switched dimmer that determines a line-frequency of an AC power source that supplies an input to the thyristor-controlled dimmer permits accurate control of periodic probing of the dimmer output. The probing is performed to predict zero-cross times of the AC power source that, in turn, are used to determine a dimming control value of the thyristor-switched dimmer. A minimum conductance is applied across the output of the dimmer during the probing intervals that begin at the turn-on time of the dimmer and last until enough information has been gathered to correctly predict a next zero crossing of the AC line voltage that supplies the input of the dimmer. The probing can be performed at intervals of an odd number of half-cycles of the AC line frequency so that internal dimmer timer operation is not affected by DC offset.
摘要翻译： 用于耦合到晶闸管开关调光器的输出的线路频率确定电路，其确定向晶闸管控制的调光器提供输入的AC电源的线路频率允许精确地控制调光器输出的周期性探测。 执行探测以预测交流电源的零交叉时间，其又用于确定可控硅开关调光器的调光控制值。 在调光间隔期间，在调光器的开启时间内，最小电导被施加到调光器的输出端，并且持续到足够的信息被收集以正确地预测提供输入的AC线电压的下一个过零点 的调光器。 可以以交流线路频率的奇数个半周期的间隔执行探测，使得内部调光器定时器操作不受直流偏移的影响。
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7.发明授权Ripple reduction in light emitting diode (LED)-based light bulb through increased ripple on an energy storage capacitor 有权通过增加储能电容器上的纹波，在基于发光二极管（LED）的灯泡中减少波纹公开(公告)号：US09326332B1
公开(公告)日：2016-04-26
申请号：US14509660
申请日：2014-10-08
发明人： John L. Melanson
CPC分类号： H05B33/0803 , H02M3/24 , H05B33/0815 , H05B33/0818 , H05B37/02
摘要： A buck stage configured as a second stage of a lamp circuit for a light-emitting diode-based (LED-based) light bulb may reduce manufacturing costs associated with the bulb by reducing a size of a capacitor in the lamp circuit. A controller of the buck stage may adjust a duty cycle of a switch to increase a ripple, such as a voltage ripple, across the capacitor to increase accessibility of energy stored in the capacitor and decrease a ripple, such as in output current, to the LEDs.
摘要翻译： 作为用于基于发光二极管（LED）的灯泡的灯电路的第二级的降压级可以通过减小灯电路中的电容器的尺寸来降低与灯泡相关联的制造成本。 降压级的控制器可以调节开关的占空比，以增加电容器两端的纹波（例如电压纹波），以增加存储在电容器中的能量的可访问性，并将诸如输出电流的纹波减小到 LED。
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8.发明授权Controlling power factor in a switching power converter operating in discontinuous conduction mode 有权控制在不连续导通模式下工作的开关电源转换器的功率因数公开(公告)号：US09325236B1
公开(公告)日：2016-04-26
申请号：US14539210
申请日：2014-11-12
CPC分类号： H02M1/4208 , H02M1/4225 , H02M3/33523 , H05B33/0815 , Y02B20/346 , Y02B70/126
摘要： A power system includes a controller to control a switching power converter, and the controller is configured to automatically transition operation of the switching power converter, during each cycle of an input voltage to the switching power converter, between operating in discontinuous conduction mode and critical conduction mode.
摘要翻译： 电力系统包括控制开关功率转换器的控制器，并且控制器被配置为在开关功率转换器的输入电压的每个周期期间，在不连续导通模式和临界导通之间自动转换开关功率转换器的操作 模式。
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公开(公告)号：US09621062B2
公开(公告)日：2017-04-11
申请号：US14200400
申请日：2014-03-07
发明人： John L. Melanson
CPC分类号： H02M5/293 , H02M1/08 , H02M7/066 , H05B33/0815 , H05B33/0845 , H05B37/02 , H05B37/0209 , H05B39/044
摘要： An apparatus may include a dimmer output voltage emulator for causing a power converter interface circuit to draw current from a capacitor in the power converter interface during a period of time when a dimmer coupled to the power converter interface circuit is non-conducting to generate an emulated dimmer output voltage. The emulated dimmer output voltage may emulate part of a cycle of a non-zero AC dimmer output voltage of the dimmer after a triac of the dimmer prematurely stops conducting that would occur if the triac continued conducting during the part of the cycle. The dimmer output voltage emulator may include a pull-down circuit to pull down current of the interface circuit and generally decrease the emulated dimmer output voltage during a first period of time and a hold circuit to maintain the emulated dimmer output voltage below a substantially non-zero threshold value during a second period of time.
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公开(公告)号：US09572208B2
公开(公告)日：2017-02-14
申请号：US14261096
申请日：2014-04-24
发明人： John L. Melanson
CPC分类号： H05B33/0815 , H05B33/0848 , Y02B20/347
摘要： A light emitting diode (LED) lighting system and method are disclosed. The LED lighting system and method include an LED controller to accurately control a current in an LED system. The LED controller includes components to calculate, based on the current and an active time period of an LED current time period, an actual charge amount delivered to the LED system wherein the LED current time period is duty cycle modulated at a rate of greater than fifty (50) Hz and to utilize the actual charge amount to modify and provide a desired target charge amount to be delivered during a future active time period of the LED current time period. The LED system and method further involve components to compare the actual charge amount to a desired charge amount for the active time period and compensate for a difference between the actual charge amount and the desired charge amount during the future active time period.
摘要翻译： 公开了一种发光二极管（LED）照明系统和方法。 LED照明系统和方法包括用于精确地控制LED系统中的电流的LED控制器。 LED控制器包括基于LED当前时间段的当前时间和当前时间周期来计算传送到LED系统的实际充电量的组件，其中LED电流时间周期以大于50的速率进行占空比调制 （50）Hz，并且利用实际电荷量来修改并提供在LED当前时间段的未来有效时间段期间要传送的期望目标电荷量。 LED系统和方法还包括将实际电荷量与活动时间段期望的电荷量进行比较的部件，并补偿在未来的有效时间段期间实际电荷量与期望充电量之间的差值。
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