What is reference frame theory in electrical machines?
All known real transformations are obtained from the general transformation by simply assigning the speed of the rotation of the reference frame. Reference frames commonly used in the analysis of electric machines and power system components include arbitrary, stationary, rotor, and synchronous reference frames.
What is meant by reference frame theory?
The reference frame transformation components allow simplification of analysis of three-phase AC circuits by performing projection of the three-phase quantities onto two stationary axes and by rotating the axes synchronously with the reference frequency. …
What is Kron’s reference frame theory?
Kron – Transformation (for a induction machine) He transformed a change of variables associated with both stator and rotor windings of a symmetrical induction machine to a variable associated with reference frame rotating in synchronism with the rotating magnetic field.
What is stator reference frame?
3.3.2 Stationary reference frame control Stationary reference frame control, also referred to αβ-control, regulates control signals in stationary two-phase frame.
How many types of reference frames are there?
There are two types of observational reference frame: inertial and non-inertial. An inertial frame of reference is defined as one in which all laws of physics take on their simplest form.
What is the importance of frame of reference?
Frames of Reference serve a valuable purpose, because they enable us to take in a wide variety of information, and process it based on our past experience and values. In fact, an individual’s Frame of Reference promotes life-stability and quicker decision making.
Why do we use Clark transformation?
Clarke and Park transforms are commonly used in field-oriented control of three-phase AC machines. The Clarke transform converts the time domain components of a three-phase system (in abc frame) to two components in an orthogonal stationary frame (αβ). Resulting signals for the Clarke transform (αβ).
What is the function of DQ transformation in induction motor control?
The fundamental reason to transform the three-phase instantaneous voltages and currents into the synchronously rotating reference dqo frame is to make computations much easier. Secondly, it allows the system operator to independently control the active (d-axis) and reactive (q-axis) components of the currents.
What is the function of induction motor?
An induction motor or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding. An induction motor can therefore be made without electrical connections to the rotor.
What is transformation in frame theory?
Reference frame theory. TRANSFORMATION The process of replacing one set of variables by another related set of variables is called transformation. In the study of power systems and electrical machine analysis, mathematical transformations are often used to decouple variables, to facilitate the solution of difficult equations with time-varying…
What is arbitrary reference frame in power system?
Krause and Thomas- Transformation (after 1965) Both were shown that time varying inductances can be eliminated by referring the stator and rotor variables to a common reference frame which may rotate at any speed. This common reference frame is also called arbitrary reference frame.
What is framing theory in media?
Framing Theory. 2. FRAMING THEORY “The action, method, or process, of constructing making or shaping anything whether material or immaterial”. In the 1930s, the media was viewed as having the ability to directly persuade and influence audiences. The audience was viewed as passive, simply allowing the media to inject it with ideas.
What is the importance of transformation in power system analysis?
In the study of power systems and electrical machine analysis, mathematical transformations are often used to decouple variables, to facilitate the solution of difficult equations with time-varying coefficients, or to refer all variables to a common reference frame.