【摘要】 阐述了无刷直流电机(BLDCM)的工作原理;分析了采用直接反电动势检测方案进行转子位置检测的机理;详细介绍了采用ST72141实现直流变速空调控制器的硬件设计;给出了其实验波形。实验结果表明,系统控制效果良好,硬件设计得到简化,具有较高的性价比。更多还原

【Abstract】 The principle of BLDCM is described,the application of d-BEMF detection method decreases the controlling complexity of sensorless Brushless DC,which indicates higher cost/performance ratio.With the development on outdoor machine controller of variable velocity DC air-conditioner,d-BEMF detection method is analyzed in theory.The controller design of DC air-conditioner is introduced in detail.Finally,some experiment results are given.更多还原