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Torque calculations of current-source induction machines using the 1-2-0 coordinate system

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2 Author(s)
Hsu, J.S. ; Center for Energy Studies, Texas Univ., Austin, TX, USA ; Amin, A.M.A.

The authors extend the use of the classical induction motor equations obtained through the 1-2-0 coordinate system to cover situations with nonsinusoidal, chopped current sources. Detailed analysis is demonstrated through the widely used six-pulse, current-source-inverter-fed induction machines. The derivations of two different types of analytical torque equation (time-domain and frequency-domain series equations) are given. Their results are compared with each other and with results obtained from extensive air-gap and shaft torque measurements. The only difference in results between the frequency- and time-domain methods is that the voltage pulse corresponding to the switching is not included in the time-domain method; however, a voltage spike, as indicated by the frequency-domain-series method, would be expected at each switching point because of the rapid change of flux linkage. Test results agree with calculated results

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Industrial Electronics, IEEE Transactions on  (Volume:37 ,  Issue: 1 )