| |
A Comparison of a Signal-Injection Method and a Discrete-Search Algorithm for MTPA Tracking Control of an IPM Machine
| [View]
[Download]
|
| Author(s) |
Thomas WINDISCH |
| Abstract |
The efficiency of interior permanent magnet synchronous machines can be increased by a lossminimization approach when implementing field-oriented control. Model-based optimization givesoperating points that yield maximum torque for a given stator current amplitude. The true lossminimum however can differ due to magnetic saturation and temperature variations. Therefore anonline discrete search algorithm using a gradient-free Nelder-Mead simplex method is proposed andcompared to an existing signal-injection method that was previously published. Simulation resultsshow that the discrete search algorithm has a faster convergence time than the signal-injection method.Once the MTPA operating point is found no further current nor torque ripple remain that couldinfluence the performance of the drive or excite mechanical vibrancy. Therefore it is better suited totrack the MTPA trajectory in highly-exploited IPM machines that have a significant saturationcharacteristic as it occurs in automotive applications. |
| Download |
| Filename: | 0366-epe2015-full-09281258.pdf |
| Filesize: | 256.8 KB |
|
| Type |
Members Only |
| Date |
Last modified 2016-06-08 by System |
| |
 |