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    • 3. 发明申请
    • DIMMABLE LIGHTING SYSTEM
    • 二合一照明系统
    • WO2006037265A1
    • 2006-04-13
    • PCT/CN2005/001584
    • 2005-09-28
    • E. ENERGY DOUBLETREE LIMITEDCHUNG, Henry, Shu-hungHO, Ngai-man
    • CHUNG, Henry, Shu-hungHO, Ngai-man
    • H05B41/39
    • H05B41/3924H05B41/3921
    • There is disclosed a reactive power controller (RPC) for dimming AC mains lighting systems that use ballasts, for example magnetic ballasts. In one embodiment, a DC/AC converter is used to convert a DC voltage, from a DC voltage source, to an AC voltage that is out of phase with current flowing through the RPC. For example, if the AC voltage is 90° or 270° out of phase with the current then the RPC will appear, to an AC mains lighting system, to be effectively a capacitor or an inductor, thus increasing the effective impedance of the mains supply to the magnetic ballast. The RPC creates a controllable AC voltage at mains frequency, so that the net voltage to the load is adjustable to dim the load. The net voltage is the vectorial sum of the AC mains voltage and the AC voltage created by the RPC. A second RPC may be used to improve the power factor of the AC mains lighting system. The second RPC generates or absorbs the required reactive power of the whole system, so that the input power factor of the AC mains lighting system becomes substantially unity. In an advantageous embodiment, the first and second RPCs are connected to share a common DC voltage source.
    • 公开了一种用于调光AC电源照明系统的无功功率控制器(RPC),其使用镇流器,例如电磁镇流器。 在一个实施例中,使用DC / AC转换器将来自DC电压源的DC电压转换成与流过RPC的电流异相的AC电压。 例如,如果交流电压与电流相差为90°或270°,则RPC将出现到交流电源照明系统,以有效地是电容器或电感器,从而增加电源的有效阻抗 到磁性镇流器。 RPC在电源频率下创建可控的交流电压,使得负载的净电压可调,以减轻负载。 净电压是由RPC产生的交流电源电压和交流电压的矢量和。 可以使用第二个RPC来提高交流电源照明系统的功率因数。 第二个RPC产生或吸收整个系统所需的无功功率,使得交流电源照明系统的输入功率因数变得基本一致。 在有利的实施例中,第一和第二RPC被连接以共享公共DC电压源。
    • 5. 发明申请
    • ELECTRONIC BALLAST WITH HIGH POWER FACTOR
    • 具有高功率因数的电子镇流器
    • WO2011020199A1
    • 2011-02-24
    • PCT/CA2010/001294
    • 2010-08-20
    • QUEEN'S UNIVERSITY AT KINGSTONLAM, JohnJAIN, Praveen
    • LAM, JohnJAIN, Praveen
    • H05B37/02H05B41/36H05B41/39
    • H05B41/2824Y02B20/186
    • This invention provides an integrated power supply for a controller of an electronic ballast for a fluorescent lamp. The integrated power supply couples output power from the electronic ballast and uses the coupled power to provide power to the controller. In one embodiment, the electronic ballast may include a rectifier for converting an alternating current input voltage into a direct current output voltage, and a circuit including a combined power factor correction (PFC) stage and an inverter, wherein the PFC stage and the inverter share a switch. Also provided is a controller for an electronic ballast. The controller may include a voltage mode or current mode duty ratio controller that controls a duty ratio of a switch of the ballast. The controller and the ballast allow dimming of the fluorescent lamp while maintaining a high power factor.
    • 本发明提供一种用于荧光灯的电子镇流器的控制器的集成电源。 集成电源耦合来自电子镇流器的输出功率,并使用耦合功率向控制器供电。 在一个实施例中,电子镇流器可以包括用于将交流输入电压转换成直流输出电压的整流器,以及包括组合功率因数校正(PFC)级和反相器的电路,其中PFC级和逆变器共享 一个开关 还提供了一种用于电子镇流器的控制器。 控制器可以包括控制镇流器开关的占空比的电压模式或电流模式占空比控制器。 控制器和镇流器允许荧光灯调光,同时保持高功率因数。
    • 8. 发明申请
    • BALLAST POWER CONTROL CIRCUIT
    • 压力功率控制电路
    • WO0022892A3
    • 2000-08-10
    • PCT/US9922378
    • 1999-09-28
    • ELECTRO MAG INT INC
    • MOISIN MIHAIL S
    • G05F1/12G05F1/652H05B37/02H05B41/39H05B41/392H05B41/40
    • G05F1/12G05F1/652H05B37/0263H05B41/39H05B41/3921H05B41/40
    • A ballast circuit for energizing a lamp includes an inductive element coupled to an input terminal and a capacitive element coupled to the inductive element in parallel with the lamp. In one embodiment, the capacitive element includes a plurality of capacitors each of which is coupled in series with a switch to control the total capacitance provided by the capacitors. By controlling the total capacitance, the intensity of light emitted by the lamp can be selected. In another embodiment, a switching element is coupled across one of the capacitors for providing a selected capacitance to the circuit for controlling the lamp light intensity. In a further embodiment, a transformer has a first winding coupled in series with the capacitive element with the inductive impedance of the first winding being controlled via a second transformer winding coupled to a control circuit. In another embodiment, a ballast circuit includes a transformer for introducing a series current into the circuit for subsequent detection by a detection circuit. This arrangement can be used to send a data signal from one point in the circuit to another which can be used to determine a lamp light intensity level.
    • 用于激励灯的镇流器电路包括耦合到输入端子的电感元件和与灯并联连接到电感元件的电容元件。 在一个实施例中,电容元件包括多个电容器,每个电容器与开关串联耦合以控制由电容器提供的总电容。 通过控制总电容,可以选择由灯发出的光的强度。 在另一个实施例中,开关元件跨越电容器之一耦合,用于为电路提供选择的电容以控制灯的光强度。 在另一个实施例中,变压器具有与电容元件串联耦合的第一绕组,通过耦合到控制电路的第二变压器绕组来控制第一绕组的电感阻抗。 在另一个实施例中,镇流器电路包括用于将串联电流引入电路的变压器,用于随后由检测电路检测。 这种布置可用于将数据信号从电路中的一个点发送到另一个,这可以用于确定灯光强度级别。