Dissertation > Industrial Technology > Electrotechnical > Motor > DC motor

Study on the Sensorless Control System of Brushless DC Motor

Author HuangShuJuan
Tutor GaoZuoZuo
School Harbin University of Science and Technology
Course Power Electronics and Power Drives
Keywords Brushless DC Motor EMF Detection Phase shift compensation Matlab simulation
Type Master's thesis
Year 2010
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The brushless DC motor Mechatronics Motor With advances in power electronics technology and the emergence of new permanent magnetic materials and the rapid development of a new type . With the brushless DC motors widely used in various fields , the advantage of the position sensor detection method has become increasingly evident . First, starting from the structure and working principle of a brushless DC motor , analysis summarizes the research status of the home and abroad sensorless brushless DC motor control technology . Around the key issues sensorless brushless DC motor control , by software , hardware and indirect access to reliable rotor position information , in-depth study of sensorless brushless DC motor control system . Brushless DC motivation while in-depth study of the \Second , the application Matlab7.1/Simulink brushless DC motor position sensor control system simulation , the system uses a double closed-loop control of speed, current speed loop and current loop PI regulator , the simulation results show that , this article design sensorless brushless DC motor system good static and dynamic characteristics , and thus provide a strong basis for the control scheme proposed in this paper . Designed the first-order RC low-pass filter , and back-EMF phase discriminator circuit and drive circuit , as well as other hardware circuit design , to build DSP main chip position sensor control system hardware experimental platform , and written in assembly language sensorless brushless DC motor control system software program . At the same time , the use of the \Finally , set up a sensorless brushless DC motor control system test platform , the entire motor control system related experiments , experimental results are given , and experimental analysis . The experiments show that the proposed and developed brushless DC motor without position sensor control system performance .

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