一種基于FPGA的步進(jìn)電機(jī)控制系統(tǒng)的設(shè)計(jì)_第1頁(yè)
一種基于FPGA的步進(jìn)電機(jī)控制系統(tǒng)的設(shè)計(jì)_第2頁(yè)
一種基于FPGA的步進(jìn)電機(jī)控制系統(tǒng)的設(shè)計(jì)_第3頁(yè)
全文預(yù)覽已結(jié)束

下載本文檔

版權(quán)說(shuō)明：本文檔由用戶提供并上傳，收益歸屬內(nèi)容提供方，若內(nèi)容存在侵權(quán)，請(qǐng)進(jìn)行舉報(bào)或認(rèn)領(lǐng)

文檔簡(jiǎn)介

一種基于FPGA的步進(jìn)電機(jī)控制系統(tǒng)的設(shè)計(jì)

Introduction

Steppermotorisawidelyusedtypeofmotorinvariousindustrialandcommercialapplications.UnliketheDCmotororACmotor,steppermotorcanaccuratelypositiontherotorwithouttheuseofanyencoderorfeedbackmechanism.Thismakesitsuitableforhigh-precisionandrepetitivetaskssuchasinCNCmachines,3Dprinters,robotics,andindustrialautomation.Inthispaper,wewillpresentadesignofasteppermotorcontrolsystembasedonFieldProgrammableGateArray(FPGA)technology.

Background

Tounderstandthesteppermotorcontrolsystem,weneedtofirstunderstandtheprincipleofoperationofthesteppermotor.AsteppermotorisatypeofbrushlessDCmotorthatconvertselectricalpulsesintoangulardisplacement.Itconsistsofarotor,stator,andasetofcoilsthatareenergizedinapatterntocreaterotation.Therotorofasteppermotorhasafixednumberofteeth,andthestatorhasasetofcoilsthatarearrangedinacircularpattern.Whenthecoilsareenergizedinacertainsequence,therotorteethmovetoalignwiththenextsetofstatorteeth,causingtherotortorotate.

Therearetwotypesofsteppermotors,namely,thepermanentmagnetsteppermotor(PM)andthevariablereluctancesteppermotor(VR).ThePMsteppermotorhasapermanentmagnetrotor,whiletheVRsteppermotorhasatoothedrotorthatinteractswithamagneticfieldgeneratedbythestatorcoils.TheVRtypeislesscommonandhaslowerefficiencycomparedtothePMtype.

Design

ThesteppermotorcontrolsystembasedonFPGAconsistsofthefollowingcomponents:

FPGAboard–ThisisthemainboardthathousestheFPGAchipandthenecessarycomponentsforpoweringandprogrammingtheFPGA.Inthisdesign,weusetheAlteraCycloneIIFPGAboard.

Steppermotordriver–Thisisacircuitthatprovidesthenecessaryvoltageandcurrenttoenergizethesteppermotorcoilsinthe

correctsequence.Inthisdesign,weusetheTexasInstrumentsDRV8825steppermotordriver.

Powersupply–ThisisasourceofpowerfortheFPGAboardandthesteppermotordriver.Inthisdesign,weusea12VDCpowersupply.

Serialcommunication–ThisisacommunicationchannelbetweentheFPGAboardandanexternaldevicesuchasacomputerormicrocontroller.Inthisdesign,weuseaUSB-to-serialconvertertoconnecttheFPGAboardtoacomputer.

TheFPGAboardisprogrammedusingVerilogHDLtogeneratetheappropriatesequenceofpulsestodrivethesteppermotor.TheVerilogcodeimplementsafinitestatemachine(FSM)thatcontrolsthedirectionandspeedofthemotor.TheFSMreadsinputsignalsfromtheserialcommunicationchanneltodeterminethedesireddirectionandspeedofthemotor.TheVerilogcodealsoincludesaclockdividertogeneratetheappropriatefrequencyforthesteppermotorcontroller.

ThesteppermotordriverisconnectedtotheFPGAboardviaSPIinterface.TheSPIprotocolisusedtosendthestepanddirectionsignalstothedriverandtoreadbackstatusinformationsuchasthecurrentandtemperatureofthedriver.TheDRV8825driveriscapableofdrivingsteppermotorswithamaximumcurrentof2.5A.Thedriveralsohasabuilt-inprotectioncircuitthatshutsdownthemotorifthecurrentortemperatureexceedsthelimit.

ThepowersupplyisusedtoprovidethenecessaryvoltageandcurrenttopowertheFPGAboardandthesteppermotordriver.Inthisdesign,weusea12VDCpowersupplythatcandeliverupto5Aofcurrent.

TheserialcommunicationchannelisusedtoconnecttheFPGAboardtoanexternaldevicesuchasacomputerormicrocontroller.Inthisdesign,weuseaUSB-to-serialconvertertoconnecttheFPGAboardtoacomputer.TheUSB-to-serialconverterprovidesavirtualCOMportthatcanbeaccessedbythecomputerusingaterminalprogramsuchasPuTTYorHyperTerminal.

Conclusion

Inconclusion,wehavepresentedadesignofasteppermotorcontrolsystembasedonFPGAtechnology.ThesystemconsistsofanFPGAboard,steppermotordriver,powersupply,andserialcommunicationchannel.TheFPGAboardisprogrammedusingVerilogHDLtogeneratetheappropriatesequenceofpulsestodrivethe

steppermotor.ThesteppermotordriverisconnectedtotheFPGAboardviaSPIinterfaceandiscapableofdrivingsteppermotorswithamaximumcurrentof2.5A.Thepowersupplyis

溫馨提示

  • 1. 本站所有資源如無(wú)特殊說(shuō)明，都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請(qǐng)下載最新的WinRAR軟件解壓。
  • 2. 本站的文檔不包含任何第三方提供的附件圖紙等，如果需要附件，請(qǐng)聯(lián)系上傳者。文件的所有權(quán)益歸上傳用戶所有。
  • 3. 本站RAR壓縮包中若帶圖紙，網(wǎng)頁(yè)內(nèi)容里面會(huì)有圖紙預(yù)覽，若沒(méi)有圖紙預(yù)覽就沒(méi)有圖紙。
  • 4. 未經(jīng)權(quán)益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
  • 5. 人人文庫(kù)網(wǎng)僅提供信息存儲(chǔ)空間，僅對(duì)用戶上傳內(nèi)容的表現(xiàn)方式做保護(hù)處理，對(duì)用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯，并不能對(duì)任何下載內(nèi)容負(fù)責(zé)。
  • 6. 下載文件中如有侵權(quán)或不適當(dāng)內(nèi)容，請(qǐng)與我們聯(lián)系，我們立即糾正。
  • 7. 本站不保證下載資源的準(zhǔn)確性、安全性和完整性, 同時(shí)也不承擔(dān)用戶因使用這些下載資源對(duì)自己和他人造成任何形式的傷害或損失。

最新文檔

評(píng)論

0/150

提交評(píng)論