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    • 1. 发明授权
    • Parallel transformer with output side electrical decoupling
    • 并联变压器,输出侧电去耦
    • US07948191B2
    • 2011-05-24
    • US12252759
    • 2008-10-16
    • Timothy ChenJames K. SkullyHaiyan Wang
    • Timothy ChenJames K. SkullyHaiyan Wang
    • H05B41/36
    • H05B41/2827
    • A higher power package is provided in a smaller package by providing at least first and second magnetics in parallel in first and second transformers. To limit degrading performance associated with circulating current between the two transformers, the transformers are electrically decoupled. In a preferred embodiment, the circuit includes parallel primary and secondary windings of the transformer that are decoupled electrically on an output side. Particularly, diodes are provided in a preheat portion of the circuit so that once the preheat phase is terminated, the diodes prevent current flow in one direction through the preheat portion of the circuit.
    • 通过在第一和第二变压器中平行地提供至少第一和第二磁体,在较小的封装中提供较高的功率封装。 为了限制与两个变压器之间的循环电流相关的降级性能,变压器被电分离。 在优选实施例中,电路包括在输出侧电耦合的并联的变压器的初级和次级绕组。 特别地,二极管设置在电路的预热部分中,使得一旦预热相终止,二极管防止电流在一个方向上流过电路的预热部分。
    • 3. 发明申请
    • HIGH POWER DIRECT DRIVE CIRCUIT
    • 高功率直流驱动电路
    • US20130307417A1
    • 2013-11-21
    • US13473559
    • 2012-05-16
    • Timothy ChenHaiyan Wang
    • Timothy ChenHaiyan Wang
    • H05B37/02
    • H05B33/0809
    • A driver circuit for driving an LED includes a rectifier circuit to receive AC voltage and to convert the AC voltage to DC voltage. The driver circuit further includes a filter circuit for filtering the DC voltage. The driver circuit further includes a detection circuit for determining a change in the filtered DC voltage over a predetermined time interval. The driver circuit further includes a dampening circuit for dampening the filtered DC voltage responsive to the detection circuit determining that the change in filtered DC voltage over the predetermined time interval exceeds a predetermined threshold.
    • 用于驱动LED的驱动器电路包括用于接收AC电压并将AC电压转换为DC电压的整流器电路。 驱动器电路还包括用于对直流电压进行滤波的滤波电路。 驱动器电路还包括用于在预定时间间隔内确定经滤波的DC电压的变化的检测电路。 驱动器电路还包括用于衰减滤波后的DC电压的阻尼电路,该阻尼电路响应于检测电路确定在预定时间间隔内滤波的直流电压的变化超过预定阈值。
    • 4. 发明授权
    • Resonant damping circuit for triac dimmable
    • 用于三端双向可控硅可调光驱动器的谐振阻尼电路
    • US08847498B2
    • 2014-09-30
    • US13473559
    • 2012-05-16
    • Timothy ChenHaiyan Wang
    • Timothy ChenHaiyan Wang
    • H05B37/02
    • H05B33/0809
    • A driver circuit for driving an LED includes a rectifier circuit to receive AC voltage and to convert the AC voltage to DC voltage. The driver circuit further includes a filter circuit for filtering the DC voltage. The driver circuit further includes a detection circuit for determining a change in the filtered DC voltage over a predetermined time interval. The driver circuit further includes a dampening circuit for dampening the filtered DC voltage responsive to the detection circuit determining that the change in filtered DC voltage over the predetermined time interval exceeds a predetermined threshold.
    • 用于驱动LED的驱动器电路包括用于接收AC电压并将AC电压转换为DC电压的整流器电路。 驱动器电路还包括用于对直流电压进行滤波的滤波电路。 驱动器电路还包括用于在预定时间间隔内确定滤波的直流电压的变化的检测电路。 驱动器电路还包括用于衰减滤波后的DC电压的阻尼电路,该阻尼电路响应于检测电路确定在预定时间间隔内滤波的直流电压的变化超过预定阈值。
    • 5. 发明申请
    • DIMMING CIRCUIT FOR A PHASE-CUT TRIAC DIMMER
    • 相位切割三角柱灯的调光电路
    • US20150351174A1
    • 2015-12-03
    • US14333620
    • 2014-07-17
    • Timothy ChenHaiyan Wang
    • Timothy ChenHaiyan Wang
    • H05B33/08
    • H05B33/0815B23H1/024H05B33/0845H05B33/0896
    • A dimmer circuit for at least one LED is disclosed. The LED is controlled by a TRIAC dimmer. A leakage current flows through the TRIAC dimmer if the TRIAC dimmer is off. The dimmer circuit include inputs for receiving a source of incoming AC power, a rectifier for receiving the source of incoming AC power and producing a DC voltage, a controller for receiving the DC voltage from the rectifier and providing a switching signal, a first circuit, and a loading circuit. The first circuit receives the switching signal from the controller. The first circuit includes a first switching element that is selectively activated based on the switching signal. The loading circuit receives the switching signal from the controller. The loading circuit includes a second switching element that is activated if the first switching element is deactivated. The loading circuit selectively provides a minimum loading current.
    • 公开了至少一个LED的调光电路。 LED由TRIAC调光器控制。 如果TRIAC调光器关闭,则泄漏电流流过TRIAC调光器。 调光电路包括用于接收输入AC电源的输入端,用于接收输入AC电源的源并产生DC电压的整流器,用于从整流器接收DC电压并提供开关信号的控制器,第一电路, 和加载电路。 第一个电路从控制器接收切换信号。 第一电路包括基于开关信号选择性地激活的第一开关元件。 加载电路从控制器接收切换信号。 加载电路包括第二开关元件,如果第一开关元件被去激活,则第二开关元件被激活。 负载电路选择性地提供最小负载电流。
    • 6. 发明授权
    • Dimming circuit for a phase-cut TRIAC dimmer
    • 相位切割TRIAC调光器调光电路
    • US09271353B2
    • 2016-02-23
    • US14333620
    • 2014-07-17
    • Timothy ChenHaiyan Wang
    • Timothy ChenHaiyan Wang
    • H05B33/08H05B41/28B23H1/02
    • H05B33/0815B23H1/024H05B33/0845H05B33/0896
    • A dimmer circuit for at least one LED is disclosed. The LED is controlled by a TRIAC dimmer. A leakage current flows through the TRIAC dimmer if the TRIAC dimmer is off. The dimmer circuit include inputs for receiving a source of incoming AC power, a rectifier for receiving the source of incoming AC power and producing a DC voltage, a controller for receiving the DC voltage from the rectifier and providing a switching signal, a first circuit, and a loading circuit. The first circuit receives the switching signal from the controller. The first circuit includes a first switching element that is selectively activated based on the switching signal. The loading circuit receives the switching signal from the controller. The loading circuit includes a second switching element that is activated if the first switching element is deactivated. The loading circuit selectively provides a minimum loading current.
    • 公开了至少一个LED的调光电路。 LED由TRIAC调光器控制。 如果TRIAC调光器关闭,则泄漏电流流过TRIAC调光器。 调光电路包括用于接收输入AC电源的输入端,用于接收输入AC电源的源并产生DC电压的整流器,用于从整流器接收DC电压并提供开关信号的控制器,第一电路, 和加载电路。 第一个电路从控制器接收切换信号。 第一电路包括基于开关信号选择性地激活的第一开关元件。 加载电路从控制器接收切换信号。 加载电路包括第二开关元件,如果第一开关元件被去激活,则第二开关元件被激活。 负载电路选择性地提供最小负载电流。