the equation of motion of knowable by dc motor: acceleration is proportional to the torque of the motor, and the torque is proportional to the motor current, therefore, to achieve high accuracy, high dynamic performance of motor control, you need to the speed of the motor at the same time, current and position for testing and control. Figure 1 is a brushless dc motor control system block diagram, the system has been set up in the speed regulator and current regulator, and adjust the speed and current of motor, respectively between the cascade connection, the speed regulator output as a current regulator input, then use the output of the current regulator to control the PWM unit.
DSP brushless dc motor entire digital control system for analytical
as shown in figure 1, the system control unit can be divided into two parts: the function of the dotted line frame composed of TMS320LF2407A DSP minimum system implementation, he includes DSP and external storage, others for feedback signal acquisition part. Current feedback signa metiri a praetorium elementum, per a / d Modulus F2407 in Digital quantitas, Rotor Position signum adhibetur ad generare rectam rotor commutator, photoelectric et angulus DSP et feedback ad motricium directionem et dsid. System positio datum superiorem apparatus. Three-phase ac input after rectifying, voltage regulator to provide dc power for inverter circuit, inverter circuit of trigger signal provided by the upper machine, the purpose of which is the output of adjustable duty ratio of PWM signal, by adjusting the width of the PWM signal to control the on and off time of power tube, so as to realize control of the brushless motor. Imperium belli
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huius ratio per tres clausa loop (situ loop, celeritate loop et current loop) structuram ad animadverto servo potestate in machina. Ut ostensum est in Figura II.
DSP Brushless DC motricium integrum digital imperium ratio pro analytica
cum motricium currit, in situ datum signum est ad mensuram Reference VG, feedback ad rationem, ut metiri & Omega; S, Brushless motricium, VG & Omega; S PI calculated in DSP (Speed loop)Get the current for A given voltage reference Uig, motor winding current feedback signal after A current sensor detection from A/D into DSP, by transformation from the current primary loop current feedback voltage Uif with Uig Uif PI calculation, get the output of the current regulator to adjust the duty ratio, and control conduction and shut off the power switch tube, so as to realize the Brushless DC motricium positus, celeritate, current et torque imperium.
In tribus clausis loop potestate ratio, current loop et celeritate loop sunt interiore circulum, exteriores positio loop. Current loop est ut amplio a Rapiditate de systematis et effectus of current loop internum intercessiones suppressionem, limit maximum current praestare tutum operationem de systematis, current loop pi regulator. Effectus celeritas loop est ad augendam ratio facultatem resistere onus commotio et inhibit celeritatem fluctuationis, celeritate loop pi regulator. Et munus in situ loop sit curare static praecisione et dynamic tracking perficientur ratio. Situs Loop induit integralis separationis PID potestate, nimirum, in principio ad track accusatus quantum ad inrita integralis actio proportionalem ieiunium semita mutationem addendo, quando præcepta est propius ad novum valorem addendo integralis est propius ad novum valorem addendo integralis est propius ad novam valorem addendo integralis est. Hoc vitare potest ad overshoot et potest breviare tempus stabilis statum, habet effectum in integralis correctio. Figura III ad gradus responsione curva et locus tracking eventus gradus genus.
