An active boost type APFC power management circuit

With the development of wireless sensors, wireless technology and micro-electromechanical systems, the micro power supply system attracts people more attention. And since mechanical vibration energy is widely distributed in nature and is subject to less restrictive environmental factors, it is gradually becoming a new study object for energy collection. At present, according to the latest study, the Magnetic Shape Memory Alloys (MSMA) under the condition of external stress will change its own magnetic permeability, and we can obtain a large induced voltage by the mutative magnetic flux through the induction coil. This article proposes an active boost type APFC (Active Power Factor Correction) power management circuit, the APFC circuit aims to allow the input current waveform to follow the input voltage waveform so as to improve power factor and this circuit here mainly includes AC / DC rectifier, control circuit and capacitor energy storage module. By doing circuit simulation, it is found that in the case of the input voltage amplitude and frequency changing, the input current will follow the changes and both of them have almost the same phase, finally this circuit can achieve the goal to charge the capacitor stably. At last, this article summarizes that this circuit can boost the output power of the vibration energy, reduce energy loss, and increase the power factor to 0.90 by using power meter.