Course detail

# AC Drives

Three phase system - configuration Y/D. Definition of complex space vector (CSV). Rotating coordinates transformation. Power analysis in three-phase system. Mathematical model of transformer and equivalent circuit. Three-phase vector described via CSV. Mathematical analysis of induction machine. Induction machine model based on ideal rotational transformer principle. Equivalent circuit in dq rotational coordinates. Control techniques of induction machine oriented on stator and rotor flux. Speed and torque control in open and feedback loop. Vector control techniques of induction machine oriented on stator and rotor flux. Control characteristics of induction machine. Mathematical analysis of synchronous machine. Induction machine model based on ideal rotational transformer principle. Equivalent circuit in dq rotational coordinates. Control characteristics of synchronous machine. Control characteristics of synchronous machine with or without saliency. Mathematical analysis of switched reluctance machine (SRM). Control techniques of SRM

Learning outcomes of the course unit

Passed student the course is able to
- describe and explain way and condition of variables description using space vectors in AC electric machines
- explain Clark and Park transform and their meaning. To define significant coordination frames
- explain how power and torque is computed using space vectors
- describe and explain induction machine dynamic model and its transformation in to various coordinate systems
- describe and explain synchronous machine model. Modify it for various variants of synchronous machine.
- describe and explain common method of scalar control of induction machine
- describe and explain common method of field oriented control of induction machine
- describe and explain common method of field oriented control of synchronous machine
- describe three-phase transistor inverter model. Define its inputs and outputs gain and transfer function.

In laboratory exercises is validated to:
- realize dynamic models of AC machines
- realize dynamic models of control methods of ac machines
- determine transfer functions of controlled systems for particular control methods

Prerequisites

Student which enter the course should be able to - apply Laplace transform - apply complex numbers - apply principles of integral and derivation computation - explain physical and electrical principles related to electromechanical energy transformation - apply continuous control theory - realize models in MATLAB – SIMULINK environment

Co-requisites

Not applicable.

Recommended optional programme components

Not applicable.

Patočka M., Magnetické jevy a obvody ve výkonové elektronice, měřící technice a silnoproudé elektrotechnice, VUTIUM, Brno 2011 (CS)
Veltman A, Pulle D, De Doncker R (2011) Advanced Electrical Drives. Springer Heidel-berg. (CS)

Planned learning activities and teaching methods

Techning methods include lectures, computer laboratories and practical laboratories. Course is taking advantage of e-learning (Moodle) system.

Assesment methods and criteria linked to learning outcomes

Requirements for completion of a course are specified by a regulation issued by the lecturer responsible for the course and updated for every.

Language of instruction

Czech

Work placements

Not applicable.

Course curriculum

1. Three phase system - configuration Y/D. Definition of complex space vector (CSV). Rotating coordinates transformation. Power analysis in three-phase system
2. Mathematical model of transformer. Equivalent circuit. Three-phase vector described via CSV.
3. Mathematical analysis of induction machine. Induction machine model based on ideal rotational transformer principle. Equivalent circuit in dq rotational coordinates.
4. Control techniques of induction machine oriented on stator flux. Speed and torque control in open and feedback loop.
5. Control techniques of induction machine oriented on rotor flux. Speed and torque control in open and feedback loop.
6. Vector control techniques of induction machine oriented on stator flux.
7. Vector control techniques of induction machine oriented on rotor flux.
8. Control characteristics of induction machine
9. Mathematical analysis of synchronous machine. Induction machine model based on ideal rotational transformer principle. Equivalent circuit in dq rotational coordinates.
10. Control characteristics of synchronous machine
11. Control characteristics of synchronous machine with or without saliency.
12. Mathematical analysis of switched reluctance machine (SRM).
13. Control techniques of SRM

Aims

To acquaint students with theory of AC controlled drives

Specification of controlled education, way of implementation and compensation for absences

Computer laboratory is compulsory

Classification of course in study plans

• Programme MKC-SVE Master's, 1. year of study, summer semester, 5 credits, compulsory

#### Type of course unit

Lecture

26 hours, optionally

Teacher / Lecturer

Exercise in computer lab

26 hours, compulsory

Teacher / Lecturer