An energy model that correlates fan airflow, head, speed, and system power input is essential to detect device faults optimize control strategies in systems. Since the application of variable-frequency drives (VFDs) makes motor-efficiency data published by manufacturers inapplicable for VFD–motor–fan systems, efficiency drive (belt–motor–VFD) must be identified each individual obtain accurate m...

In this paper, using a personal computer (PC), the practical implementation of scalar and vector control methods on a three–phase rotor surface- type permanent magnet synchronous machine drive is discussed. Based on the machine dynamic equations and the above control strategies, two block diagrams are presented first for closed-loop speed controlling of the machine drive/system. Then, the desig...

Permanent Magnet Brushless DC Motor has become a popular electrical drive because of its advantages such as high efficiency, increased reliability, quick dynamic response and very low maintenance. Due to this competitive edge it has stirred a lot of interest in simulating a PMBLDC Motor and its associated drive system in a comparatively simple manner. This paper elaborates the proposal of devel...

Recently, digital signal processors (DSP's) are becoming more popular in the area of ac motor control, in particular the induction motor drives. The fast number crunching capabilities of DSP's which are traditionally meant for data processing tasks such as image processing and speech recognition, are being utilised to perform on-line calculation of the ac motor variables, such as electromagneti...