| Abstract |
In photovoltaic pump systems, the solar array accounts for a substantial fraction of the overall system cost. Therefore, all system components must have a high efficiency in a large power range. Low voltage standard induction motors do not fit this criterion. Hence, a dedicated 3.8 kW permanent magnet synchronous motor for a surface application is designed, built and compared to a standard induction motor. A damper cage is added to the permanent magnet rotor to allow open loop control. The motor is fed by a modified IGBT inverter, equipped with a selectable constant voltage or a maximum power point tracking facility. Furthermore, particular attention is paid to
matching of all system components yielding maximum overall system performance. The system output in terms of pumped water is simulated for different geographical locations. Finally, the results of this test set-up are used to
design a motor-pump unit suited for submersion. |
