Input voltage stabilizing circuit of electric automobile

The utility model relates to the technical field of voltage stabilizing circuits, and discloses an input voltage stabilizing circuit of an electric automobile, which is lower in power consumption and smoother in output ripple wave, and comprises a voltage stabilizing module (101), a first adjusting module (102), a switch module (103), a second adjusting module (104) and an output filtering module (105), the voltage stabilizing module (101) adjusts the duty ratio of the control signal according to the first voltage signal or the second voltage signal fed back by the first adjusting module (102) or the second adjusting module (104) so as to maintain the voltage value of the output second voltage signal. 本实用新型涉及稳压电路技术领域，公开了一种功耗较低且输出纹波较为平滑的电动汽车的输入稳压电路，包括稳压模块(101)、第一调节模块(102)、开关模块(103)、第二调节模块(104)及输出滤波模块(105)，其中，稳压模块(101)根据第一调节模块(102)或第二调节模块(104)反馈的第一电压信号或第二电压信号调节控制信号的占空比，以维持输出第二电压信号的电压值。