Electrical Machines and Power Electronics:

Electrical Machines and Power Electronics:

The main areas of research REA electrical machines and drives, power electronics and control systems, and electrification.
At home we have a large and well-equipped laboratory, where did most of the practical and experimental research.

Electric Drives - Electrical Machines :

Principles Motor Action Michael Faraday showed that flow freely through a pipe suspended in a constant magnetic field, a force that creates the conductor moving through the field causes. Conversely, if the conductor and the magnet is then not only the creation of the magnetic field will move in relation to the pipeline.
In general, the force generated to create the stream, now known as the Lorentz force, the transactions between the conductor and the magnetic field or the magnetic field.
The size of the force on the pipeline is given by:
F = BLI
Where F is the force in the pipeline is, L runs the length of the conductor and I the current is through the pipeline
Generator Action:

Faraday also showed that the opposite is the case - the motion of a conductor with a magnetic field or moving the magnetic field in relation to the pipeline so that a current flowing from the pipeline.
The size of the EMF is generated in this way, given by:
E = Blv
Where E is the EMF generator (or back EMF in a motor) and v is the speed of the pipeline in the area
Alternative Motor Activity (Interactive Fields) :

Another form of momentum that can not, on the Lorentz force from and the flow of electricity, in principle, from the purely attractive (or repulsive) are magnetic force on a magnet or a magnetically sensitive materials, exercised derived iron, when in another magnet placed. The movement of a compass needle in the presence of a magnet is an example. In practice, however, should at least create a magnetic field of an electromagnet to achieve the necessary control of the magnetic field a continuous motion as well as on a practical level, the torque to achieve.
Brushless motors, DC motors and reluctance is this phenomenon as "reluctance torque, because no electrical currents flowing well known in the rotor. Rotary motion by sequential pulsing of the stator poles reached to create a rotating magnetic field, which pulls along the moving-magnet that.
AC induction motors on the spinner by a different method and the main engine generates action taken depends on the strength of Lorentz, but modern AC motors have a rotor magnetic elements that drew nearly synchronous with the rotating field as a brushless DC motor.

Reluctance torque:

The torque is generated by the reaction between the magnetic fields. Imagine a small magnet in another larger magnet as the divide between the poles of a magnet wheel, or in one of the pole pairs an electric motor. (See Table reluctance motor). When the magnet is aligned with the poles of the large magnetic field that is in line with the external field. This is a state of equilibrium, and the line he will have no power to move. However, when the line aligns with the poles or rotated or displaced, the experience of a force pulls it back into line with the external field. In the case of lateral displacement, the force increases with increasing distance, but in the case of the rotation will increase the force reaches a maximum when the line is at right angles to the external field. In other words, the torque on the magnet is a maximum when the cells are rectangular and zero if the field is aligned.

Main Poles Dependent reluctance motor torque normally "salient poles - poles sticking out. This is related to the current focus on certain areas, angled to maximize and focus the strength of alignment between the areas.

Torque of rotating fields:

For engines, based on the rotating sectors, such as induction motors, brushless DC motors and restraint, depending on the instantaneous torque of the rotor, flow depends on the angular position of the angular position of the shaft. Although the wave flow tries to pull the rotor poles, in line with the flow, there will always idle, and the losses of the cursor back.
Slip:

Friction, windage and other losses caused by the rotor of an induction motor, again with a lower speed than in the rotation in a row angular misalignment between the rotating shaft and the rotational flow refers to a field poles of the rotor. The difference between the speed of the wave flux and the rotor speed is called "slip" and the torque of the motor is proportional to the stub.
Torque angle:

In modern engines, flow in which the rotor turns with the same speed as the wave, because the loss is placed at the rotor poles never achieve a complete alignment is given to the peaks of the wave, and is a shift between the rotating shaft and the Riverside spinner. Otherwise there would be no torque. This shift is called the "torque angle". The torque of the motor is zero when the torque angle is zero and the maximum torque, when the angle of 90 degrees. When leaving the torque angle of 90 degrees and the rotor will stop the synchronization.