| 基于电流反馈的直流无刷风扇电机无传感器控制 |
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| 引用本文： | 苏译,徐晓昂. 基于电流反馈的直流无刷风扇电机无传感器控制[J]. 电气自动化, 2012, 34(3): 12-14 |
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| 作者姓名： | 苏译 徐晓昂 |
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| 作者单位： | 1. 武汉理工大学自动化学院,湖北武汉,430070
2. 益阳职业技术学院机电工程系,湖南益阳,413049 |
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| 摘 要： | 针对无传感器直流无刷风扇电机开环控制的不稳定性和转速闭环控制的相位偏差,首先从直流无刷风扇电机的数学模型及反电势过零点检测方法出发,阐述了由外部PWM驱动的开环控制和转速闭环控制方法的不足,提出了一种新型的基于电流反馈的无传感器直流无刷风扇电机控制系统。最后借助MATLAB/Simulink软件进行了建模与仿真,验证了新型控制系统的可行性。仿真结果表明,提出的控制系统具有良好的稳定性并有效消除了相位偏差。
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| 关 键 词： | 直流无刷风扇电机 反电势 电流反馈 无传感器 |
The Sensorless Control of Brushless DC Fan Motors Based on Current Feedback |
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| SU Yi , XU Xiao-ang. The Sensorless Control of Brushless DC Fan Motors Based on Current Feedback[J]. Electrical Automation, 2012, 34(3): 12-14 |
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| Authors: | SU Yi XU Xiao-ang |
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| Affiliation: | 1. College of Electric and Automation, Wuhan University of Technology, Wuhan Hubei 430070, China; 2. Department of Mechanical and Electrical Engineering, Yiyang vocational and technical college, Yiyang Hunan 413049, China) |
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| Abstract: | For instability of open-loop control and phase deviation of speed closed-loop control in sensorless brushless DC fan motors, this paper begins with the mathematical model and the detection method of zero crossing point of brushless DC fan motors, the defects existing in the open-loop control driven by external PWM signals and closed-loop speed control method are expounded, a novel control system of sensorless brnshless DC fan motors based on the current feedback is proposed. Finally, the software of MATLAB is used for the modeling and simulation for the whole system, the feasibility of the proposed control system is verified. The simulation results show that the proposed control system has a good stability and eliminates the phase offset effectively. |
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| Keywords: | Brushless DC Fan Motor Back EMF Current Feedback Sensorless |
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