中文摘要
电源是各种电子设备的核心，它有如人体的心脏，是所有电类设备的动力。20世纪90年代以来，随着电力电子技术飞速地发展，不断涌现出新型电力电子器件，高智商化IC和新电路拓扑，创造出十年前意想不到的许多新型稳压电源。现代高频开关稳压电源作为电源的一个分支，由于它具有功率小，效率高，体积小，重量轻，稳压范围宽，可靠安全等一系列特点，现在正越来越受到青睐和推崇。现代高频开关稳压电源技术涉及的内容是极其广泛和复杂的，它横跨了三个学科:一是微电子精细加工的智能化专用集成电路控制芯片系统;二是正在快速更新的高性能功率半导体MOSFET和IGBT等电力电子器件;三是要合理利用，绕制各种电感器件和变压器所用的磁性材料等几大类。
现代开关稳压电源已广泛用于基础直流电源，交流电源，各种工业电源，计算机电源，UPS不间断电源，医疗和照明电源，雷达高压电源，音响和视频电源等。本文设计的单相脉宽调制逆变电源属于交流电源(AC-DC-AC逆变)，采用电压反馈控制，通过中断功率通量和调节占空比的方法来改变驱动电压脉冲宽度来调整和稳定输出电压。其主电路构成采用的是Boost电路和全桥电路的组合。控制电路采用了2片集成脉宽调制电路芯片，一片用来产生PWM波，另一片与正弦函数发生芯片做适当的连接来产生SPWM波，集成芯片比分立元器件控制电路具有更简单，更可靠的特点和易于调试的优点。
本文详细的分析了该逆变电源的工作过程，并推导了重要公式。最后对该逆变电源进行了计算机仿真和样机实验，验证了其可行性和有效性。
关键词：逆变器;正弦脉宽调制;场效应管
Abstract
Power supply is core and drive of electric equipments. With the flying development of power electronics technology, It has come forth continually that is IC of high intelligence, new type electronic device and topology since 1990’s. As aresult, A lot of new type steady-voltage power supply has been created that is indescribable ten years ago. High-frequency switching power supply is a branch of power supply. It possesses many advantages such as low-power, high-frequency, small- volume, light-weight, wide-range of steady voltage, credibility and security. It has been received and upheld by the people. It involves a great deal content that is extensive and intricate. It bestrides subject of three aspects. The first is IC control chip system of micro-electronics; The second is electronic devices of high-performance power semiconductor such as MOSFET and IGBT. The third is various devices of inductance and magnetic materials of transformer how to be utilized and rolled rationally.
Steady voltage power supply of modern switching has been applied in the following aspects widely. They are DC power supply, AC power supply, industry power supply, computer power supply, UPS power supply, power supply of medical treatment and lighting, high voltage power supply of radar, power supply of sound and video frequency and so on. Single-phase Sinusoidal Pulse Width Modulation Inverter Power Supply in this paper belongs to AC power supply (AC-DC-AC convert). Control mode adopts feedback of voltage control. The methods of intermitting power flux and changing duty-cycle can change pulse width of drive voltage that adjust and rectify output voltage ultimately. The main circuit is made up of compounding of Boost and the full-bridge circuit. The control circuit adopts two chips of integrated pulse width modulation. One produces PWM waveform. The other connects chip of producing sinusoidal signal properly, which brings SPWM waveform. Integrated chip is more simple, reliable and laboratorial than discrete component.
The operation of inverter power supply is thoroughly analyzed and some important formulas are deduced. Finally, the principle of operation are illustrated and verified on emulation and experimental results.
Key words: inverter; Sinusoidal Pulse Width Modulation,MOSFET
目录
3.3 主电路设计 11
3.3.3 限流电路设计 14
3.4 主电路图 21
第5章 结论与展望…………………………………………………………………………..33
致谢……………………………………………………………………………………………….34
参考文献………………………………………………………………………………………. 36
