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STUDY OF STEEP FRONTS IN STATOR WINDINGS OF HIGH VOLTAGE INDUCTION MACHINES SUPPLIED BY 3 LEVEL INVERTERS
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| Author(s) |
L. Popiel; M. Dessoude; J. P. Reboul |
| Abstract |
Electronic adjustable speed driver bring a number of advantages for industrial
processes. 3-level GTO inverters currently offer considerable potential for high voltage induction motors. This kind of converter generate pulses with very short rise times which may stress the stator insulation of the motors. In order to determine whether this has a detrimental effect, it is proposed to model the inverter-induction motor combination by incorporating the
main physical phenomena of the windings subjected to the steep - fronted surges. The model presented here compute the voltage between turn and ground, and between the turns of a coil. This model is validated by experimental measurements. The principal simulation results show
that the interturn voltage would not exceed 10% of the power supply voltage for GTO inverters, and that the semiconductor switching times must be greater than twice the transit time of the waves in the motor cables if it is wished to limit the over voltage at these terminals. |
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| Filename: | Unnamed file |
| Filesize: | 511.7 KB |
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| Type |
Members Only |
| Date |
Last modified 2018-04-12 by System |
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