1. DUAL CONVERTER WITH POWER TRANSISTOR AND SPEED CONTROL FOR DC MOTOR
Prepared by
Amena Ateeli & Bara`ya`qoub
Supervisor
Dr. JAMAL KHAROUSHA
A PROJECT INTRODUCTION REPORT IN
IELECTRICAL ENGINEERING
An-najah National University
Nablus-Palestine
2010

2. PROJECT OBJECTIVES Operation the machine in four quadrants.
Closed loop speed control of separately dc machine.
Speed control with tachogenerator and cascade current control.
On the other hand, the project will study how it can be interface the converter with PIC Controller, and the electronic circuits for this aim, also the software to generate the pulses.

3. PROJECT IMPORTANCE
Saving electrical energy by regenerative the energy to the network when the machine operation in generating mode.
Ability operation the machine in different modes which get flexibility to the system.

4. General Block Diagram :
Controller
Power Circuit
Converter DC
Machine
PIC controller
Interfacing
Circuit
Protection
Power Supply

5. Power Supply: We need two power supply
1.To feed Power transistor circuit to operate the circuit.

6. 2.To feed the control circuit:

7. Converter with Power Transistors
In this converter we use the DC chopper (Class E) techniques to control of voltage armature.

8. Operation in Four Quadrant

9. Interface circuit:

11. Status The Pins and Operation the devices
State the machine
F.Motor
R.Motor
F.generator
R.generator
PIC number port
Pin16
Pin17
Pin25
Pin26
Operation transistor Q1 Q2 Q3 Q4 D1 D2 D3 D4
State logic 1
The diode used to Protection the transistors
Not flow current

12. pic

13. Flow Chart

14. THE END