Power Electronics with Embedded System using PIC 18F4520 microcontroller

1. Power Electronics using Embedded System

2. Power Electronics using Embedded System
Agenda
Day 1
Introduction to Proteus Mixed Simulation & PIC CCS C Compiler
Built-in Functions of PIC CCS C Compiler
Implementing ZCD Hardware Circuit in Proteus & Simulation
Zero Crossing Detection of AC Waveform using PIC Micro
Theory behind TRIAC based AC Motor Control
Circuit & Software Simulation in Proteus
Actual Hardware Implementation using 18F4620
Day 2
Theory behind Converter based DC Motor Control
Circuit & Software Simulation in Proteus
Actual Hardware Implementation using 18F4620
Question / Queries Session

3. Power Electronics using Embedded System
Introduction to Proteus Mixed Simulation
System Components
ISIS Schematic Capture - an easy to use yet extremely powerful tool for entering your
schematic designs.
ARES PCB Layout - high performance PCB design system with automatic component
placer, rip-up and retry auto-router and interactive design rule checking.
VSM - Virtual System Modeling lets you co-simulate embedded software
for popular micro-controllers alongside your hardware design

4. Power Electronics using Embedded System
Schematic Capture

5. Power Electronics using Embedded System
ARES PCB Layout

6. Power Electronics using Embedded System
VSM - Virtual System Modeling

7. Power Electronics using Embedded System
PIC CCS C Compiler
Features of C programming
C is a portable language intended to have minimal modification when transferring
programs from one computer to another.
The main program flow will basically remain unchanged, while the various setup and
port/peripheral control will be micro specific.
An example of this is the port direction registers on a PIC micro MCU are set 1=Input
0=Output, whereas the H8 is 0=Input and 1=Output.

8. Power Electronics using Embedded System
PIC CCS C Compiler
CSS C IDE Interface.

9. Power Electronics using Embedded System
PIC CCS C Compiler Functions

10. Power Electronics using Embedded System
PIC CCS C Compiler Functions

11. Power Electronics using Embedded System
PIC CCS C Compiler Functions

12. Power Electronics using Embedded System
PIC CCS C Compiler Functions

13. Power Electronics using Embedded System
PIC CCS C Compiler Functions

14. Power Electronics using Embedded System
PIC CCS C Compiler Functions

15. Power Electronics using Embedded System
PIC CCS C Compiler Functions

16. Power Electronics using Embedded System
PIC CCS C Compiler Functions

17. Power Electronics using Embedded System
PIC CCS C Compiler Functions

18. Power Electronics using Embedded System
PIC CCS C Compiler Functions

19. Power Electronics using Embedded System
PIC CCS C Compiler Functions

20. Power Electronics using Embedded System
PIC CCS C Compiler Functions

21. Power Electronics using Embedded System
PIC CCS C Compiler Functions

22. Power Electronics using Embedded System
PIC CCS C Compiler Functions

23. Power Electronics using Embedded System
PIC CCS C Compiler Functions

24. Power Electronics using Embedded System
PIC CCS C Compiler Functions

25. Power Electronics using Embedded System

26. Power Electronics using Embedded System
PIC CCS C Compiler
Example of LED Blinking
#include "led_blinker.h"
#define LED PIN_C0
void main()
{
set_tris_c(0xfe);
while(1)
{
output_high(LED);
delay_ms(500);
output_low(LED);
delay_ms(500);
}
}
LED WILL BE ON & OFF ALTERNATELY WITH 500ms
INTERVAL

27. Power Electronics using Embedded System
PIC CCS C Compiler & Proteus Simulation
Example of LED Blinking

28. Power Electronics using Embedded System
PIC CCS C Compiler
NOW, ITS YOUR TASK TO REWRITE THE SAME
CODE WITH TOGGLE FUNCTION
TIME – WITHIN 10 MINUTES
HINT – USE FUNCTION
“output_toggle(pin)”

29. Power Electronics using Embedded System
PIC CCS C Compiler
ASSIGNMENT
GENARATE 1kHz SQUARE WAVE WITH
20% DUTY CYCLE
TIME – WITHIN 10 MINUTES

30. Power Electronics using Embedded System
PIC CCS C Compiler
ASSIGNMENT
WRITE PROGRAM TO IMPLEMENT THE
FOLLOWING LOGIC OPERATION
TIME – WITHIN 10 MINUTES

31. Power Electronics using Embedded System
Proteus Simulation
ASSIGNMENT – IMPLEMENT THE ZCD CIRCUIT BELOW AND STUDY THE
WAVE FORM AT PB0 AND JUNCTION OF R8 & R9

32. Power Electronics using Embedded System
TRIAC + MCU Based FAN Regulator
Zero Crossing Detector

33. Power Electronics using Embedded System
TRIAC + MCU Based FAN Regulator
TRIAC FIRING CIRCUIT

34. Power Electronics using Embedded System
TRIAC + MCU Based FAN Regulator
TRIAC FIRING CIRCUIT

35. Power Electronics using Embedded System
TRIAC + MCU Based FAN Regulator
ZCD DETECTION & TRIAC FIRING PULSE GENERATION
FIRING PULSE OUTPUT
ZCD PULSE INPUT
SPEED INCR SW
SPEED DECR SW

36. Power Electronics using Embedded System
TRIAC + MCU Based FAN Regulator
ZCD DETECTION & FIRING PULSE GENERATION PROGRAM
EXTERNAL INTERRUPT

37. Power Electronics using Embedded System
TRIAC + MCU Based FAN Regulator
SPEED INCREMENT / DECREMENT PROGRAM
INPUT SWITCH SACN

38. Power Electronics using Embedded System
TRIAC + MCU Based FAN Regulator
SPEED INCREMENT / DECREMENT PROGRAM
SPEED INCREMENT

39. Power Electronics using Embedded System
TRIAC + MCU Based FAN Regulator
SYSTEM INITIALIZATION PROGRAM
SYSTEM INITIATE

40. Power Electronics using Embedded System
FULL WAVE HALF CONVERTER
Zero Crossing Detector

41. Power Electronics using Embedded System
FULL WAVE HALF CONVERTER
Zero Crossing Detector

42. Power Electronics using Embedded System
FULL WAVE HALF CONVERTER
Controller Unit
Input ZC Signal to RB0
SCR Firing Pulses
Power Decrement Switch
Power Increment Switch

43. Power Electronics using Embedded System
ZCD DETECTION & FIRING PULSE GENERATION PROGRAM
EXTERNAL INTERRUPT
FULL WAVE HALF CONVERTER
Variable delay “dly”

44. Power Electronics using Embedded System
ZCD DETECTION & FIRING PULSE GENERATION PROGRAM
SWITCH SCAN
FULL WAVE HALF CONVERTER
Variable delay “dly”

45. Power Electronics using Embedded System
ZCD DETECTION & FIRING PULSE GENERATION PROGRAM
SYSTEM INIT & MAIN PROGRAM
FULL WAVE HALF CONVERTER

46. Power Electronics using Embedded System
Question & Answer

47. Power Electronics using Embedded System