A three-phase full-bridge synchronous rectification circuit suitable for human body power generation

Abstract

The embodiment of the present invention provides a three-phase full-bridge synchronous rectification circuit suitable for human body power generation, including a three-phase AC electromagnetic generator, a MOSFET synchronous rectification circuit, a synchronous rectification conduction sequence detection circuit, a shaping circuit and an IR2136 three-phase full-bridge drive circuit, etc. The synchronous rectification circuit is designed by using MOSFET instead of the diode, and through the specially designed synchronous rectification conduction timing detection circuit, shaping circuit and IR2136 three-phase full-bridge driving circuit, the detection, shaping and power amplification of the synchronous rectification signal are realized, and the The driving signal is connected to the synchronous rectification MOSFET power tube, thereby realizing the three-phase full-bridge synchronous rectification of the low voltage output of the human body power generation. The invention adopts the MOSFET tube instead of the diode to realize synchronous rectification, reduces the loss of the rectifier diode, and the greater the output current of the generator, the more significant the effect of reducing the loss, and greatly improves the energy collection efficiency of human knee joint power generation.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of portable human body power generation, and more specifically, relate to a three-phase full-bridge synchronous rectification circuit suitable for human body power generation. Background technique [0002] With the development of science and technology, the types and quantities of equipment carried by individuals outdoors and individual soldiers when performing field tasks are increasing day by day, especially more and more electronic equipment, which puts forward higher requirements for the power and capacity of personal outdoor power supplies. At the same time, it is impossible to realize all-weather real-time replenishment of electric energy in the field, which inevitably requires an increase in the number and weight of power supplies; on the other hand, in order to improve personal mobility, it is required to further reduce the weight and volume of personal equipment. In addition, t...

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Problems solved by technology

However, the conduction voltage drop of an ordinary rectifier diode is generally around 1V. Even if a Schottky diode with a low conduction voltage drop is used, the conduction voltage drop is 0.5V, so that the voltage drop on the rectifier diode during rectification output is approximately On the other hand, the output voltage of the human knee joint power generation is generally 4-8V, and the power loss caused by the diode voltage drop on the rectifier bridge is 12.5%-25%.

Therefore, for the low voltage output by human body power generation, using the traditional diode three-phase full bridge circuit to rectify energy collection efficiency is low, which is not conducive to the efficient collection of human body power generation.

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