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高压大功率逆变电源过流保护电路的实现
资料介绍
在高压大功率逆变电源的设计中,IGBT的驱动与保护是重要的课题。IGBT器件能承受的过流时间通常为几微秒,所以可靠的过流保护电路对电源的稳定、可靠运行至关重要。常见的过流保护电路通过检测IGBT集电极、发射极间电压判断IGBT是否过流。设计的过流信号产生电路在IGBT过流时产生低电平信号,经CPLD数字电路的逻辑处理后可以可靠地实现IGBT的过流保护,具有较强的抗干扰性,避免了电源系统频繁的跳闸保护,响应时间在IGBT允许的过流时间之内。
In the design of high-voltage high-power inverters, the drive and protection of IGBT is very important. Usually, IGBT can endure a few microseconds over-current time. Thus, a reliable over-current protection circuit is vital to the steady and reliable operation of the power supply. The common over-current protection circuit judges if the IGBT has over-current by detecting the voltage between the collector and the emitter of the IGBT. In the designed circuit generating over-current signal, a low level signal is produced when over- current happens, and after logical processing of the CPLD, IGBT over-current protection can be realized reliably with high tolerance of interference, so that frequent tripping protection is av...
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| 文件名 | 大小 |
| 高压大功率逆变电源过流保护电路的实现.pdf | 1017K |
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