LFU:online

Department of Mechatronics Department of Mechatronics

Ass.-Prof. Dr. Dr. Spasoje Miric Ass.-Prof. Dr. Dr. Spasoje Miric, +43 512 507 62780
Takanobu Ohno Takanobu Ohno, +43 512 507 62782

850708

VU Electrical Machines

VU 2

3

weekly

annually

English

Upon completion of this lecture on electric machines, you will be able to:

• Define the basic principles of electric machines and distinguish between the different types of electric machines, including DC, synchronous, and asynchronous machines.
• Explain the construction and working principles of DC machines, including commutation, armature windings, and field windings.
• Analyze the behavior of synchronous machines, including the effects of load changes and power factor correction, and understand the concept of synchronous speed.
• Describe the operation of asynchronous machines, including the concepts of slip and rotor construction, and analyze the behavior of induction motors under varying load conditions.
• Identify the main applications of electric machines in the industry and understand the importance of efficient energy conversion in these applications.
• Apply mathematical equations and concepts to analyze the performance of electric machines, such as torque-speed curves, power factors, and efficiency.
• Evaluate the advantages and disadvantages of different types of electric machines and make informed decisions about the most appropriate machine for specific applications.
• Recognize the importance of electric machines in developing renewable energy sources and the transition towards a sustainable energy future.

I. Introduction

Definition of electric machines

Types of electric machines

Importance of electric machines in the industry and renewable energy

 

II. DC Machines

A. Construction and Operation

Parts of a DC machine (armature, field winding, commutator, brushes)

Working principle (interaction between magnetic fields)

Torque production (Fleming's left-hand rule)

B. Modeling and Control

Equations for torque, power, and efficiency

Armature control (voltage and current control)

Field control (flux and speed control)

 

III. Synchronous Machines

A. Construction and Operation

Parts of a synchronous machine (stator, rotor, field winding)

Working principle (interaction between magnetic fields)

Torque production (relation between field current and rotor position)

B. Modeling and Control

Equations for torque, power, and efficiency

Field control

 

IV. Asynchronous Machines

A. Construction and Operation

Parts of an asynchronous machine (stator, rotor, slip rings, or squirrel cage)

Working principle (induction of current in the rotor)

Torque production (relation between rotor current and slip)

B. Modeling and Control

Equations for torque, power, and efficiency

Voltage control (stator voltage control and frequency control)

Slip control (rotor resistance control and V/f control)

 

V. Conclusion

Summary of the lecture

Applications and future developments in electric machines

see dates

12:00 - 13:30 Uhr, Besprechungsraum 101