| –The static converters are a vital component of modern drive systems, which in turn are indispensable in industrial equipment designed for small or large complexity, because the achievement of finished goods implies the adjustable mechanical energy available at the output of the system. The aim of this paper is the energetic analysis of two drive systems with the same static converter feeding two different motors which had been performed on an experimental stand for different static operating points. It was considered feeding the both asynchronous motors from the static converter using the space vector modulation command strategy while the mechanical load was assured by a special braking machine and by a DC motor, respectively. It had been taken into consideration feeding the both motors at the same frequencies and with the same RMS voltages. The frequencies considered for the energetic analysis are 20Hz, 30Hz, 40Hz and 50Hz, the mechanical load being adjusted from no load operation up to the nominal value. The power grid energetic parameters were recorded using a Fluke 41b harmonic analyzer, while the current and voltage waveforms at the motor input, were recorded using a Metrix Ox704 digital oscilloscope and later used in Matlab to calculate the AC electric powers. |
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