Efficient control system for electric motors

Details Efficient control system for electric motors Efficient control system for electric motors

H - Electricity

02

P

H02P 21/00 (2006.01) H02J 3/18 (2006.01) H02P 23/00 (2006.01)

Patent

CA 2166862

An electric power controller (8) for use with AC induction motors (9) that measures line voltage and current phase angles, and uses a microprocessor (10) to calculate delay values for firing silicon control rectifier (SCR) gates (76) to provide efficient amounts of current to the motors (9). The calculation is made using the measured phase angles, an inputted measured full load power factor for each motor, and corrected power factor value stored in a read-only-memory (ROM).

Régulateur (8) d'alimentation électrique pour moteurs à induction (9) fonctionnant sur courant alternatif. Il mesure la tension de ligne et les angles de phase réels, et utilise un microprocesseur (10) pour calculer les valeurs des délais d'activation des circuits de déclenchement (76) du redresseur commandé au silicium, afin de fournir aux moteurs (9) des quantités de courant suffisantes. On utilise pour le calcul les mesures des angles de phase, le facteur de puissance pleine charge qui a été introduit et mesuré pour chaque moteur, ainsi que la valeur du facteur de puissance corrigé, enregistrée sur une mémoire morte (ROM).

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