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摘要 从风机特性及传感器调节方面研究了无风速传感器实现空调恒定风量输出的控制方法，介绍了恒风量控制系统的软硬件设计方法、设计目标及实验结果。实验结果表明该方法具有可行性，在不同的风阻下基本能实现风量的恒定输出。 关键词 传感器 恒风量 永磁同步电动机 Design and implementation of constant air volume controller of fan motor without air velocity sensor By Wu Zhengli，Li Xuchun，L Yisong and He Ji Abstract Studies the control method from the aspects of fan characteristics and sensor adjustment, and presents the hardware and software development, the design objective and the experiment results. The results prove the practicability of this method by which constant output of air can be achieved for different air resistances. Keyword ssensor， constant air volume， permanent magnet synchronous motor