Pulse Width Modulated (PWM) Inverters for Efficiency Optimal Control of AC Drives – switching Angles and Efficiency/Loss Profiles

Solutions are given for efficiency optimal PWM (pulse width modulation) inverter operation for AC motor drives. Exact motor models are used. There, e. g., temperature and rotor skin effects can be considered. The exact solutions are compared to solutions found based on simplified motor models and to...

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Bibliographic Details
Published inIFAC Proceedings Volumes Vol. 16; no. 16; pp. 231 - 238
Main Authors Zach, F.C., Thiel, F.A.
Format Journal Article
LanguageEnglish
Published 01.09.1983
Subjects
efficiency optimization
Electrical drives
inverters
optimal control
pulse width modulation
inverters
pulse width modulation
optimal control
efficiency optimization
Electrical drives
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Summary:Solutions are given for efficiency optimal PWM (pulse width modulation) inverter operation for AC motor drives. Exact motor models are used. There, e. g., temperature and rotor skin effects can be considered. The exact solutions are compared to solutions found based on simplified motor models and to the selected harmonic elimination (SHE) method. It is shown that the PWM switching pattern of the efficiency optimal control (EOC) is nearly insensitive to motor parameters. (Absolute loss values are, of course, very much dependent on motor parameters. ) Therefore this control method is equally easy to apply as, e. g., SHE. Also, further investigations based on other literature indicate that also motor dynamics can be improved in comparison to elimination of only specific harmonics with SHE.
ISSN:1474-6670
DOI:10.1016/S1474-6670(17)61873-1