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Torque capability of a field oriented induction motor drive under voltage sag conditions
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| Author(s) |
K. Stockman; F. D'hulster; R. Belmans |
| Abstract |
This paper describes the torque capability of a field oriented induction motor drive under three fase balanced voltage sag conditions. Starting from the general description of the field oriented induction motor with main flux saturation, the maximum steady-state torque capability under reduced dc bus voltage is calculated. Both inverter current limit and voltage limit are considered and the optimal reference currents to maximize torque are given. From the steady-state analysis, a strategy to adjust the under-voltage protection level on the dc bus is proposed in order to increase the ride-through of the drive. The typical field oriented control scheme is modified to supply the flux and current controllers with the correct reference values for maximum torque. When considering the slow rotor flux dynamics, the maximum torque of the saturated machine can only be obtained with a dynamic flux controller quickly adjusting the rotor flux reference |
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| Filename: | EPE2003-PP0870 - Stockman |
| Filesize: | 302.7 KB |
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| Type |
Members Only |
| Date |
Last modified 2003-10-30 by Unknown |
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