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介绍了利用变频调速技术对通风机进行节能改造工作原理及系统设计。建立了以rrrrrrrrn监控计算机“主”、数字信号处理器为“从”的界面通信系统，能实现对电机运行状态rrrrrrrrn的监测、控制、故障排除和远程监控。
The working principle and system design of energy saving reformation of ventilator with frequency conversion technology are introduced. Established a r r r r r r r r r n monitoring computer “master”, digital signal processor “from” the interface communication system, can achieve the motor running status r r Monitoring, Control, Troubleshooting, and Remote Monitoring.