暖通冷凝器计算的excel表格计算文档，比较实用-HVAC condenser calculation excel spreadsheet documents, more practical

空调压缩机变频控制算法，与直流无刷永磁电机相关，与节能相关。-PWM control algorithm of air-conditioner s condenser

Condenser motors are widely used because the motor needs the 1-phase voltage source we have everywhere. But the single phase motor creates an elliptical rotating field that may cause some problems such as noise,vibrations and more losses that bring