TVZ Mechatronics Team / BLDCmotorDriver

Library for driving a 3-phase brushless DC motor.

Dependents:   BLDC_mainProgram STMF302R8_MotorDrive HelloWorld_IHM07M1

BLDCmotorDriver

Introduction

This library is still being developed.

This is a Wiki page about BLDCmotorDriver library developed by TVZ Mechatronics Team. The library is part of our project of creating an e-bike which is supposed to drive/run a 3-phase brushless DC motor with Hall sensors.

We are testing our library on NXP mbed LPC1768 platform and driver DRV8301 from Texas Instruments to run our testing BLDC motor. Next step of our project is creating a standalone library for DRV8301.

Hall sensors

In our BLDC motors there are three Hall sensors located 120 degrees from one another, they are identified as InterruptIn/DigitalIn on mbed and they send zeros and ones on TeraTerm with we locate in which sector

Na našim testnim BLDC motorima postoje 3 halova senzora, koji su udaljeni za 120 stupnjeva jedan od drugoga te inicijaliziranjem svakog pojedinog kao InterruptIn/DigitalIn na pinovima mbeda preko terminala na računalu (TeraTerm) dobivamo prikaz binarnih nula i jedinica koji se slažu sa trobitnim gray-evim kodom, s time da smo kombinacije 000 i 111 definirali kao fault vrijednosti. Pošto se slučajevi kada su sva tri hallova senzora upaljena ili ugašena ne mogu dogoditi tj. ne bi se smijeli dogoditi, ukoliko je došlo do takve situacije dogodio se kvar na hallovim senzorima te bi motor trebao prijeći u mod rada bez hallovih senzora.

With that we got six combinations, which we use to determine six sectors:

  • 001 - Sector 1
  • 011 - Sector 2
  • 010 - Sector 3
  • 110 - Sector 4
  • 100 - Sector 5
  • 101 - Sector 6

Nakon toga odredili smo za sve tri faze stanja mosfeta..

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Components

/media/uploads/dfraj/kotac.jpg

BLDCmotorDriver.h@2:7aae78b85e1d, 2015-06-01 (annotated)

Committer:
mslovic
Date:
Mon Jun 01 13:40:39 2015 +0000
Revision:
2:7aae78b85e1d
Parent:
0:5602fba2a7f7 
First working version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mslovic 0:5602fba2a7f7 1 #include "mbed.h"
mslovic 0:5602fba2a7f7 2 #include "RateLimiter.h"
mslovic 0:5602fba2a7f7 3
mslovic 0:5602fba2a7f7 4 class BLDCmotorDriver {
mslovic 0:5602fba2a7f7 5 public:
mslovic 2:7aae78b85e1d 6 BLDCmotorDriver(PinName GH_A, PinName GL_A, PinName GH_B, PinName GL_B, PinName GH_C, PinName GL_C, PinName h1, PinName h2, PinName h3, PinName Fault);
mslovic 0:5602fba2a7f7 7 void configure(float sampleTime, float switchingFrequency, float rampUpSlope, float rampDownSlope);
mslovic 0:5602fba2a7f7 8 void setDutyCycle(float dutyCycle);
mslovic 0:5602fba2a7f7 9 void coast();
mslovic 0:5602fba2a7f7 10 float getDutyCycle();
mslovic 2:7aae78b85e1d 11 int getSector();
mslovic 2:7aae78b85e1d 12 void ispis();
mslovic 2:7aae78b85e1d 13
mslovic 0:5602fba2a7f7 14 private:
mslovic 2:7aae78b85e1d 15 PwmOut GH_A, GH_B, GH_C;
mslovic 2:7aae78b85e1d 16 DigitalOut GL_A, GL_B, GL_C; // Low-side gates are never PWM driven
mslovic 2:7aae78b85e1d 17 InterruptIn H1; // InterruptIn can be used on all pins except p19 and p20
mslovic 2:7aae78b85e1d 18 InterruptIn H2;
mslovic 2:7aae78b85e1d 19 InterruptIn H3;
mslovic 0:5602fba2a7f7 20 RateLimiter rl;
mslovic 0:5602fba2a7f7 21 Ticker ticker;
mslovic 0:5602fba2a7f7 22 float switchingPeriod, dutyCycle, tempDutyCycle, sampleTime;
mslovic 2:7aae78b85e1d 23 void commutation();
mslovic 2:7aae78b85e1d 24 int currentSector, _currentSector, previousSector, difference;
mslovic 2:7aae78b85e1d 25 DigitalOut Fault;
mslovic 2:7aae78b85e1d 26 int h1, h2, h3;
mslovic 2:7aae78b85e1d 27 //void adjustDutyCycle();
mslovic 2:7aae78b85e1d 28
mslovic 0:5602fba2a7f7 29 };