PIC16F684的低成本双向直流有刷电机控制

Thisapplicationnotediscusseshowtousethe

Enhanced,Capture,Compare,PWM(ECCP)onthe

PIC16F684forbidirectional,brushedDC(BDC)motor

control.Low-costbrushedDCmotorcontrolcanbe

usedinapplicationssuchasintelligenttoys,small

appliancesandpowertools.ThePIC16F684takes

Microchip'sMid-RangeFamilyofproductstothenext

levelwithitsnewECCPperipheral.TheECCP

peripheralbuildsonthetechnologyoftheCCPmodule

withaddedfeaturessuchasfourPWMchannelsfor

easybidirectionalmotorcontrolthroughthehardware.

ThisapplicationnotefocusesonusingtheECCPin

PWMmodeusingthefull-bridgeconfiguration.Using

theECCPallowseasyinterfacingtoafull-bridge

configurationforbidirectionalBDCmotorcontrol.

Thisapplicationnotewilldiscussthefollowing:

•CalculatingECCPPWMParameters

•InitializingtheECCPinfull-bridgePWMmode

•BidirectionalBDCMotorControl

•SensorlessMotorControlFeedback

•ExampleApplicationAN893Low-CostBidirectionalBrushedDCMotorControlUsingthePIC16F684Author:MikeRyleeCALCULATINGECCPPWMMicrochipTechnologyInc.PARAMETERSWhenworkingwiththeECCPinPWMmode,thePWMINTRODUCTIONfrequency,dutycycleandresolution,therearethreeusefulpiecesofinformationtobecalculated.ThisapplicationnotediscusseshowtousetheEnhanced,Capture,Compare,PWM(ECCP)onthePIC16F684forbidirectional,brushed