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| 摘要: |
| 介绍了以AT89C51单片机为控制中枢,利用EXB841专用驱动及保护器件对功率模块绝缘栅双极晶体管(IGBT)进行驱动与保护的变频器设计方法。介绍了EXB841在应用中的一些原则性事项,阐述了AT89C51单片机产生正弦脉宽调制(SPWM)脉冲的算法及编程方法,描述了异步电动机在变压变频(VVVF)调速时的近似机械特性及变频调速方式下的主要对策以及带有反馈信号的输出控制方式的实现,最后给出了变频调速控制下的实际数据。 |
| 关键词: IGBT,驱动,逆变,变压变频 |
| DOI： |
| 分类号:TN773 |
| 基金项目: |
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| Frequency changer design based on single-chip |
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YUAN Li-hui
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| Abstract: |
| A frequency changer is designed with AT89C51 single-chip as its control center and EXB841 to drive and protect IGBT(Insulated Gate Bipolar Transistor).Some items of EXB841 ap-plications are introduced,and the algorithm and programming of SPWM(Sine Pulse Width Modu-lation) pulse generation using AT89C51 are elaborated.The approximate mechanical characteristic of asynchronous motor in VVVF(Variable-Voltage and Variable-Frequency) regulation and counter-measures in variable-frequency speed regulation are described.The output control mode with the feedback signal is realized.Finally,the actual data in variable-frequency speed regulation are provided. |
| Key words: IGBT,drive,inversion,VVVF, |
