Naturally Commutated Synchronous Motor Drives
In high horsepower applications, such as turbo-compressors, induced and forced draft fans and boiler feed pumps, very high mechanical efficiencies can be achieved through the use of adjustable speed motor drives, resulting in substantial energy savings. Such high horsepower applications are typically beyond the range of conventional DC motor drives as well as force-commutated induction motor drives. The load commutated inverter (LCI) fed synchronous motor drive has established itself as a leading choice for such applications, particularly for those with fan load type characteristics. Load commutation is made possible by the induced EMF of the synchronous machine, which ...
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