【摘要】 便携式微型专用成分分析仪机内空间小，元器件密集程度高，要求稳压电源效率高，发热量小和干扰小。为此，本文介绍了一种干扰小的100kHz调宽式（PWM）开关稳压电源。重点讨论了铁氧体磁环用作扼流圈的计算、绕制与测试。这种PWM稳压电源不仅适用于仅用灯的稳压和控制，也适用于其它电路。更多还原

【Abstract】 The portable elenrental analyzers tequire voltage-stabilized power supply with high efficiency, low heat and free of interference because of the narrowness of space and compact of elements. In order to meet these requirements, an interference-free 100 kHz pulse-width nodulation (PWM) voltage-Stabilized power supply was designed. The calculation, wiwding and measarement for making chode with feinte loop are discnd emphatically. the PWM power supply not only can be used for voltate-stabilizing and control of light soarees of instnarents, but also can be used for other circuits.更多还原