Daim ntawv thov txheej txheem ntawm brushless tsav on kiv cua motor
Vim tias lub tshuab tsis txhuam tsis muaj dab tsi, tsis muaj kev sib dhos, tsis txhuam, tsis muaj nplhaib, nws cov qauv yog yooj yim dua cov AC thiab DC motors, kev khiav hauj lwm muaj kev ntseeg ntau, thiab kev tswj xyuas kuj yooj yim. Piv nrog rau cov khauj khaum-khib induction lub cev, simplicity ntawm nws cov qauv thiab cov kev ntseeg ntawm kev lag luam yog roughly sib npaug. Txij thaum tsis muaj hlau nplaum noj thiab siv tooj liab, lub zog yog 10% ~ 20% siab tshaj qhov ntawm lub zog tam sim no ntawm qhov kev qhia tshwj xeeb thaum lub zog qis dua 300W; nws yog ntau dua li qhov siv tshuab pa taws.
Lub tshuab tsis txhuam ntswj yog feem ntau tsav los ntawm ib lub kauj voj voos, thiab Siv lub Ntsuas Seem (Hall Sensor) siv los ua qhov chaw rotor. Qhov teeb meem yog yuam kom commutate los ntawm no lub teeb liab. Cov tswv yim no muaj ib txoj kev tswj yoojyim yooj yim thiab qis tus nqi, thiab feem ntau yog siv nyob rau hauv lub tswv yim hluav taws xob tam sim no. Thaum muaj qhov kev hloov tam sim no, lub tshuab nqus dej loj yog qhov loj, yog li cov suab nrov nrov yog qhov tsis zoo, uas yog qhov nyuaj los txhawb rau hauv cov khoom siv hauv tsev. Lub ntses sinusoidal yuav zam tau cov kev hloov tam sim no thaum lub sij hawm commutation, Txawm hais tias lub siab tshaj plaws torque yuav txo, tab sis nyob rau ntawm lub suab nrov nrov. Muaj kev pom zoo.
Feem ntau, txoj kev tswj ntawm cov hlau nplaum sib txuas lub sij hawm uas muaj qhov sib txuas sib xws nyob rau hauv http://bbsic.big-bit.com/ siv DSP, thiab lub tshuab yuav tsum tau muab qhov nruab nrab ntawm qhov nruab nrab ntawm qhov chaw rotor, txawm siv rau hauv qhov system servo, tab sis tus nqi yuav siab heev, cov khoom siv hluav taws xob nyob rau hauv tsev yog qhov yooj yim heev rau tus nqi, thiab qee qhov kev siv tau muaj kev ua haujlwm qis dua. Piv txwv li, hluav taws xob hluav taws xob, cov tshuaj DSP vector tswj kev tswj cov tshuaj tua kab mob ntshav siab yog ib qho nyuaj los txhawb. Yog li no, daim ntawv no tau siv 8-ntsis microcontroller nrog PWM. Lub tswv yim ntawm kev tsim hluavtaws xob ntawm lub tshuab hluav taws xob tau muaj kev lag luam siab.
Feem ntau, cov pa hluav taws magnetic field ntawm lub ntsws sinusoidal DC brushless lub cev yog lub sine wave (tseem hu ua ib qho kev sib txuas ntawm lub tshuab synchronous) los yog ib qho chaw sib nqus tom qab lub xuab zeb dej tau txhaj rau hauv kev sib raug zoo dua. Tus stator siv ib qho kev sib zog faib, vim li ntawd sab nraud electromotive quab yuam kuj yog sine wave. Kev ntsuas peb-txoj kab yog mounted rau ntawm lub rotor, thiab cov zis hloov txhua 60 ° hluav taws xob li lub teeb liab synchronization ntawm sine wave, txav tsis yuam kev.
Thib ob, qhov kev kho vajtse
Lub hauv paus ntawm cov tshuaj no yog 8-ntsis single-chip microcomputer SH79F168 nrog kev sib koom ua ke PWM. Nws txais kev pom zoo ntawm ib lub voj voog tshuab nkaus xwb 8051, 16kFlash ntim hauv nruab siab, tau tshaj txhua yam khoom siv ntawm cov khoom qub 8051, txais yuav JTAG emulation hom, built-in 16.6 MHz oscillator, thiab txuas rau tib lub sijhawm. Cov haujlwm nram qab no:
TUS Dual DPTR pointers. 16-ntsis x8 multiplier thiab 16-ntsis / 8 divider.
3 channel 12-ntsis nrog thaj tsam ntawm lub chaw tua PWM, 6 tawm, cov qauv tawm ntawm sab nraud tuaj yeem tso, nruab nrab thiab kev sib txhaub ntug
Integrated fault detection function, uas tau instantly tua cov PWM tso tawm.
Built-in amplifier thiab piv txwv rau kev sib tw tam sim no kev kuaj thiab kev tiv thaiv overcurrent.
✓ Npaj muaj kev tiv thaiv kev kho vaj tse.
Npaj Flash qhov kev pab cuam yus tus kheej, yuav siv tau ua EEROM rau kev simulation, yoojyim rau cov khoom siv tsis tau.
Lub hauv paus txheej txheem coj tus cwj pwm uas muaj peb theem, tswj kev tsav tsheb, ICT, kev sib koom ua av, thiab kev sib koom ua ke, txais cov IC built-in amplifier thiab ADC kom paub cov qauv tam sim no thiab cov qauv hluav taws xob, IC. Thiab PWM qhov kuaj pom kev ua haujlwm kom dhau kev tiv thaiv kev tiv thaiv.
