70531 POWER ELECTRONICS PRINCIPLES AND APPLICATIONS

Year	No.	Offer	Mode	Description			Cred. Pts
98	70531 	S1  	X 	POWER ELEC PRIN & APPLIC'N	1.00

Contents

• Staffing
• Pre-requisite(s)
• Synopsis
• Objectives
• Topics
• Recommended References
• Student Workload
• Assessment Details
• Other Requirements

STAFFING:

PRE-REQUISITE(S)

70326 70230/E0003

SYNOPSIS:

Power  Electronics deals with study of semiconductor  devices  in  the
electric energy industry. The power semiconductor devices, such as the
diode,  thyristor,  triac  and power transistor,  are  used  in  power
applications  as  switching  devices. The modern  electrical  engineer
requires  a  knowledge  of  these devices  and  their  application  in
rectification,  inversion, frequency conversion,  dc  and  ac  machine
control, and switch-mode power supplies.

Engineers  need  to  be  aware of the undesirable  effects  any  power
electronic equipment imposes on both the supply system and  the  load,
and how these effects may be minimised.

OBJECTIVES:

A student who has mastered this unit should be able to :

1. describe the principle of operation and sketch the
   characteristics of common power semiconductor devices;
   
2. evaluate rms values, mean values of Fourier components in
   power electronic circuit waveforms;
   
3. analyse rectifier circuits including transformer fed 3 phase
   and 12 pulse diode rectifiers;
   
4. analyse phase controlled thyristor converters including three
   phase half controlled rectifiers and fully controlled
   converters;
   
5. analyse quantitatively the step up, step down, buck boost,
   cuk, half bridge and full bridge dc to dc converters;
   
6. analyse quantitatively the idealised half bridge, full bridge,
   centre tapped and three phase square wave and PWM inverters;
   
7. use the guidelines in AS13S9.30 or IEC34.1 to select the
   continuous torque rating that a motor should have if it is to
   satisfy a load torque demand with a given profile;
   
8. carry out quantitative analysis on multi quadrant DC
   adjustable speed drive systems;
   
9. select ac adjustable speed motor/drive combinations for
   applications with given torque/speed, acceleration and
   deceleration requirements;
   
10. design gate or base drive circuits for power electronics
    switches based on required switching performance and
    information from data sheets;
    
11. evaluate the benefits of snubber circuits used in power
    electronics circuits;
    
12. evaluate thermal protection requirements of power electronics
    switches.
    

TOPICS:

 Description                                                    Weighting(%)

Mathematical tools for power electronics circuit analysis             5.00

Characteristics of power electronic devices                           10.00

DC to DC Converters                                                   10.00

Diode Rectifiers                                                      10.00

Line frequency fully controlled converters                            10.00

Switch mode inverters                                                 10.00

Switching DC power supplies                                           10.00

Overview of electrical drives systems                                 5.00

DC adjustable speed drives                                            10.00

AC adjustable speed drives                                            10.00

Drive circuits                                                        5.00

Thermal protection and snubber circuits                               5.00

RECOMMENDED REFERENCE MATERIALS:

IEEE Spectrum.

IEE proceedings.

Electrical Engineer (Australia).

Australian Standards AS2279 and AS1359.30.

ABB Review.

IEEE Transaction on Power Electronics.

IEEE Transactions on Industry Applications.

STUDENT WORKLOAD REQUIREMENTS:

	ACTIVITY				HOURS
Directed Study                                	87
Private Study                                 	35
Examinations                                  	3
Assessments                                   	30

ASSESSMENT DETAILS:

No  *F/S Marks     Due        Description                              Wtg(%)    LBL WWW
1   S    150.00    03/04/98  WRITTEN ASSIGNMENT 1                      15.00     Y
2   S    150.00    29/05/98  WRITTEN ASSIGNMENT 2                      15.00     Y
3   S    700.00    END S1    3 HOUR EXAMINATION                        70.00     N

OTHER REQUIREMENTS:

1    Students  must achieve at least 50% of maximum possible marks  in
     the examination, and at least 50% of total maximum possible marks
     for a pass in the unit.
2    If  students submit assignments after the due date without  prior
     approval  then  a  penalty of up to 20% of the  assignment  total
     marks will apply for each working day late.
3    The   Faculty  of  Engineering  and  Surveying  will  NOT  accept
     submission  of  hand written or typed assignments  by  facsimile,
     email  or computer diskette. Students in remote locations who  do
     not  have regular access to postal services may be given  special
     consideration.
4    A  minimum  standard of communication skills must be demonstrated
     in order for a passing grade to be achieved.