| |
Sliding Mode Control Of Double Star Asynchronous Machine-Two Pwm Inverters Set
| [View]
[Download]
|
| Author(s) |
N. Madani, M. F. Benkhoris, C. Millet, R. Ledoeuff |
| Abstract |
The supply of double star AC machine by two voltage PWM inverters ensures a power segmentation on the one hand. On the other hand, it introduces a redundancy into the structure, necessary for applications like the naval propulsion. However, this electrical drive presents disadvantages with stator currents quality which depend directly on the inverter’s control law, phase-shift between the two stars, and stator leakage inductance. The machine model is established based on the vectorial formalism. Only the voltages and currents in the aß plane are related to electromechanical energy conversion. The nonsequential (xy) currents don’t contribute to electromechanical energy conversion and cause losses. Therefore the control of Double Star Asynchronous Machine (DSAM ) has a double objective; better control of torque and minimization of the non sequential currents amplitude. A sliding mode control type appear to answer to these two criteria thanks to the possibility to attract the variable on the sliding surface and to maintain it on this surface. In this paper we will present a decoupled model of a DSAM. And a set of simple surfaces have been chosen for each variable and the associated control laws have been synthesized. |
| Download |
| Filename: | A71414 |
| Filesize: | 706.8 KB |
|
| Type |
Members Only |
| Date |
Last modified 2006-02-17 by System |
| |
 |