Design a Half Bridge Inverter and a Full Bridge Inverter with Overload Protection Circuit Using IC555

S. S. Shukir
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引用次数: 3

Abstract

Inverter is a power electronic circuit that converts the direct voltage (DC) to an alternating voltage (AC). Inverters are used in a range of applications from consumer electronics and industrial to renewable energy. The flexible capability to create an AC signal from a DC voltage, frequency and speed control are all accomplished from the use of Inverter. Inverter takes the voltage and passes it through switching elements which turn the DC signal into an AC square wave signal. This wave is then passes through filter which turns it into a sine wave signal of the required voltage. This paper presents design an inverter with overcurrent protection circuit without microcontroller, where the MOSFET gate driver is controlled by pulses generated from 555 timer, and with using a low pass filter and setup transformer, a low cost sine wave inverter has been obtained. The heart of the design is 555 timer. The design is achieved in Proteus 8. Simulation results demonstrated that a single phase sine wave (50 Hz) has been generated by a half bridge inverter and a full bridge inverter and protection circuit from current higher than 4.5A has been built. The reliability and accuracy of the system are verified through an experiment.
用IC555设计带过载保护电路的半桥逆变器和全桥逆变器
逆变器是一种将直流电压转换为交流电压的电力电子电路。逆变器用于从消费电子和工业到可再生能源的一系列应用。从直流电压、频率和速度控制中创建交流信号的灵活能力都是通过使用逆变器完成的。逆变器将电压通过开关元件,将直流信号转换成交流方波信号。这个波然后通过过滤器,将其变成所需电压的正弦波信号。本文设计了一种无单片机的带过流保护电路的逆变器,利用555定时器产生的脉冲控制MOSFET栅极驱动器,利用低通滤波器和设置变压器,得到了低成本的正弦波逆变器。设计的核心是555定时器。该设计是在Proteus 8中实现的。仿真结果表明,半桥式逆变器和全桥式逆变器均能产生50 Hz的单相正弦波,并建立了电流大于4.5A的保护电路。通过实验验证了该系统的可靠性和准确性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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