Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
no...it's not my problem. The problem is how do using the PIC16f877 to generate the PWM and control the 3-phase motor and how to configure it in such a way.
Cause this is my part of the final year project, my teammate construct the afpm motor, and i design to control the motor.
Actually i know some method to generate the PWM, but i dunno how to built the circuit and how is the controller look like. For example Using NI ELVIS prototype board(LabVIEW), PIC16F877/873, and DSP kit F2812.
can anyone teach me or give suggestion to me? plz...
If you have to use that PIC you can try a AD7226 to generate a 3 phase signal, but it'll need to be amplified(good luck with that). In reality you are asking too much out of that little PIC. If you want a step by step. Go to microchip.com purchase the ACIM demo board and the motor and HV module that goes with it... it'll have a PIC 30F6010 hook it up to a motor and download the code into it... then you're done. I wouldn't try 3 phase control on anything less than a 18F452 and even then you're doing software PWM on one of the legs... I highly recommend the 30F6010. You'll need a driver like a IR2131 and a IGBT pack..