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    • 3. 发明授权
    • Noise reduction in a power converter
    • 电源转换器降噪
    • US07202609B2
    • 2007-04-10
    • US10504140
    • 2003-01-27
    • Wilhelmus Hinderikus Maria LangeslagJoan Wichard Strijker
    • Wilhelmus Hinderikus Maria LangeslagJoan Wichard Strijker
    • H05B41/36
    • H02M3/33507H02M1/44H02M3/3385Y02B70/1433
    • A power converter includes a control device (28) for a switching power converter (10), a switching power converter and a method of controlling a switch in a power converter for reducing audible noise. The power converter includes the control device (28) and at least one switch (26) for regulating the power conversion. The control device (28) includes a timer (45) for monitoring a switching frequency of the switch (26) to indicate when the frequency has dropped to a certain level, and a gate driving circuit (32) connected to the timer and arranged to regulate the switching of the switch in dependence of the indication from the timer, so that the frequency rises above the certain level in order to reduce generation of audible noise.
    • 电力转换器包括用于开关电力转换器(10)的控制装置(28),开关电力转换器和控制功率转换器中用于降低可听见噪声的开关的方法。 功率转换器包括控制装置(28)和用于调节功率转换的至少一个开关(26)。 控制装置(28)包括:定时器(45),用于监视开关(26)的开关频率,以指示频率何时下降到一定水平;以及栅极驱动电路(32),连接到定时器并被布置成 根据来自定时器的指示来调节开关的切换,使得频率上升到高于某一水平,以减少可听见的噪声的产生。