Modelling and simulation ofa 1kw high-speed switched reluctance motor(SRM) for vacuum cleaner.?
In:Symposium on power electronics, industrial drives, power quality andtraction systems, june 5-7 1996. SPEEDAM’96 in Capri-Italy,pp.A4-11-A4-18
Here are some guys to look up that give speeches on that topic: Asressahegn Mezmur, Gotthard Berger, Technical University of Ilmenau, Germany. Also, here is an abstract about that may help. The aim of this paper is to present a method of optimisation of turn-on and turn-off angles of a high speed two-phase switched reluctance motor. A suitable model of the motor is developed, which takes into account double saliency and iron saturation. The model inductances and torque versus rotor position and current are calculated using finite element method (FEM). This model is used in a Spice circuit. Mechanical parameters, such as torque, speed, inertia and damping are in included in this circuit by using equivalent electrical parameters. Current, torque, speed waveforms from start of the motor to steady state can be obtained. Because of required high speed of this motor the proper position of switching angles is very important. Time constant of a phase winding is in the same range or even longer as commutation period. Therefore so a special care must be taken that the current reaches zero before next turn-on and that the maximum average torque is obtained. A method for loss calculation is presented, which is used to obtain optimal motor parameters in view of efficiency. Finally, model results and measurements are compared and discussed.
The principle of operation of a switched reluctance motor (SRM) is based on the well-known principle where electromagnetic systems are led to a stable equilibrium in which magnetic reluctance is minimal . So SRM principle of operation is very easy to understand. But accurate performance calculations are much more difficult because of double saliency and iron saturation, which means that SRM phase magnetisation characteristics vary as a function of excitation current and rotor position. Therefore, numerical methods are used for calculation of magnetic field. Results, obtained from FEM analysis, were used for further application in calculation of current and torque waveforms. Calculated results were at this stage verified with measurements.
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