什么是EC风机呢？
经常碰到客户询问，简单介绍如下：
1. EC技术风机，可通过外部的电路脉冲调制或0-10V的电压调节来实现风机的无级变速。
Variable speed control of EC fan can be realized/achievedvia 0-10V speed adjustment
and/or external circuit impulse modulation.
2. EC技术的风机通过180度正弦（SVPWM）矢量控制可实现智能的恒转速、恒转矩、恒流量控制，满足客户的智能需求。
Constant torque,constant speed and constant airfiow of EC fan be fulfilled via180° sine SVPWM(Space Vector PWM) to meet customer needs.
3. 智能的EC风机可支持用户通过485总线实现集中运行控制和监控多达255台风机。
Intelligent EC fan can support users to realize centralized operation control by 485 bus and monitor as many as 255 fans
4. 采用EC 技术的风机拥有全面的保护功能：如缺相、浪涌电压、过欠电压、堵转、过电流、温度保护等。
EC fan has comprehensive protection function,such as phase failure,overvoltage, undervoltage,loched-rotor,over current and temperture protection.
