Brushless DC Motor Control System Design And Research

Permanent magnet Brushless DC motor is a very promising and applicationprospects of electronic control of motor, the brushless DC motor was born, because of itshigh efficiency, wide range of speed, no rotor loss, high power density characteristics bythe extensive attention and application.Firstly, this paper introduces brushless DC motor the development history andcurrent research status, analysis of the brushless DC motor ’s basic structure, elaboratedthe basic principle of Brushless DC motor, establishment of specific parameters ofBrushless DC motor based on the basic mathematical model, based on the mathematicalmodel of the brushless DC motor ’s basic characteristics. Derivation of a brushless DCmotor basic equation.Secondly, a detailed analysis of the brushless DC motor of square wave modulationmethod of square wave control, control of various modulation method, introducedsynchronous continuous flow concept reduces specific conditions by continuous flowgenerated power. Discusses the brushless DC motor rotor position detection principle andmethod used in this paper, on the Holzer induction rotor position sensor principle to givedetailed introduction. Study of the brushless DC motor torque fluctuation mechanism aswell as its torque fluctuation.Again, elaborated the unideal trapeziform back EMF brushless DC motorcharacteristics, analysis of this kind of motor square wave modulation drive and orientedmagnetic field id=0different ways of control points, the first detailed analysis of thetrapezoidal BEMF flat-top width on brushless DC motor control performance; modelledpermanent magnet synchronous motor field orientation control was first introduced bymagnetic field directional id=0the concept of control, and gives the calculation methodand result, the establishment of a system simulation model, the simulation results showthat this algorithm is introduced in this paper has certain Progressiveness.Finally, the company of meaning law semiconductor STM32F103B highperformance special motor control chip, IAR Embedded Wrokbench For ARM6.10 compiler is a software development system, design of Brushless DC motor controlsystem; hardware platform comprises: rectifier circuit, switching power supply, current,current isolation analog signal input circuit, a control chip peripheral interface circuit, apower device and its driving circuit, the fault signal processing circuit module. Thepower device and a control board adopts a separated design, control board through thekeyboard to modify the parameters can be used for different power brushless DC motor.Using standard C language, control software, the final debugging success confirmed therationality of the system, practical.