【摘要】 峰值电流模式DC/DC Boost变换器输入电压范围较宽,适用于两级式光伏发电系统的前级。DC/DC Boost变换器的输入电压较低时,一般采用固定斜坡补偿来保证其稳定运行,低输入电压范围宽时,往往需要过补偿,无法达到设计功率。提出一种动态斜坡补偿的方法,使变换器在较宽输入电压下都能稳定工作且具有较高效率。40 W样机测试结果显示:输入电压在16～24 V的范围内,变换器均能稳定工作。更多还原

【Abstract】 The DC/DC boost converter operating in peak current mode has a wide input voltage range,which is suitable for the pre-stage of a two-stage photovoltaic power generation system. The constant slope compensation is usually used to ensure the DC/DC Boost converter stable operation when the input voltage is low. Over compensation is often required when the range of low input voltage is wide,but it’s unable to reach the design power. A method of dynamic slope compensation was proposed,which can make the converter work steadily and have high efficiency under the wide input voltage. The testing results of the 40 W prototype show that the converter works steadily in the input range voltage from 16 V to 24 V.更多还原