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    • 4. 发明申请
    • POWER SUPPLY CIRCUIT
    • 电源电路
    • WO1994003033A1
    • 1994-02-03
    • PCT/US1993006632
    • 1993-07-15
    • MOTOROLA LIGHTING, INC.
    • MOTOROLA LIGHTING, INC.KONOPKA, John, G.
    • H05B37/02
    • H05B41/3927H05B41/28H05B41/42Y10S315/04Y10S315/05Y10S315/07
    • A power supply circuit (100) for use in driving fluorescent lamps (102, 104, 106) has a current mode control voltage boost IC (144) which produces a boosted voltage and has a power control input (pin 3) and a frequency control input (pin 4). The lamps are driven by a self oscillating inverter (178, 180, 196, 198) which is powered from the voltage boost IC and which operates at a frequency independent therefrom. In order to dim the lamps a D.C. bias voltage is applied to the power control input. At the same time a commensurate D.C. bias voltage is applied to the frequency control input so as to provide power factor correction in dependence on the power produced by the voltage boost IC. The circuit thus provides a substantially constant, optimum power factor at both full and dimmed light levels.
    • 用于驱动荧光灯(102,104,106)的电源电路(100)具有产生升压电压并具有功率控制输入(引脚3)和频率控制的电流模式控制升压IC(144) 输入(引脚4)。 灯由自振荡逆变器(178,180,196,198)驱动,该自振荡逆变器由升压IC供电并以与其无频率的频率工作。 为了使灯变暗,将D.C.偏置电压施加到功率控制输入。 同时,将相应的直流偏置电压施加到频率控制输入,以便根据由升压IC产生的功率提供功率因数校正。 因此,电路在完全和暗淡的光级处提供基本恒定的最佳功率因数。
    • 7. 发明申请
    • POWER SUPPLY HAVING HIGH POWER FACTOR WITH CONTROL THAT TRACKS THE INPUT ALTERNATING SUPPLY
    • 具有跟踪输入替代电源的控制的高功率因数电源
    • WO1992016085A1
    • 1992-09-17
    • PCT/US1992001752
    • 1992-03-06
    • MOTOROLA LIGHTING, INC.
    • MOTOROLA LIGHTING, INC.KONOPKA, John, G.STEPHENS, Dennis
    • H05B37/02
    • H02M1/4225H05B41/28Y02B70/126
    • A voltge boost power supply, for use in a fluorescent lamp ballast (100), having: an inductance (170) coupled between an alternating supply voltage input (108, 110) and an output (134, 136), a switch (128) for controlling the current carried by the inductance, and a current-mode control IC (144) for producing a PWM control signal to control the switch so as to control the current carried by the inductance and thereby control the voltage across the inductance. The current-mode control IC is coupled (138) to the input so that the frequency of the control signal is modulated in accordance with the alternating supply voltage whereby the frequency of the control signal has a maximum value when the magnitude of the alternating supply voltage is a maximum. The power supply thus exhibits reduced harmonic distortion and increased power factor.
    • 一种用于荧光灯镇流器(100)的电压升压电源,具有:耦合在交流电源电压输入(108,110)和输出(134,136)之间的电感(170),开关(128) 用于控制由电感携带的电流;以及电流模式控制IC(144),用于产生PWM控制信号以控制开关,以便控制由电感携带的电流,从而控制电感两端的电压。 电流模式控制IC被耦合(138)到输入端,使得控制信号的频率根据交流电源电压被调制,由此当交流电源电压的大小时,控制信号的频率具有最大值 是最大的。 因此,电源表现出减少的谐波失真和增加的功率因数。