A solid state motor starter with energy recovery

Details A solid state motor starter with energy recovery A solid state motor starter with energy recovery

H - Electricity

02

P

H02P 1/42 (2006.01) H02P 1/26 (2006.01)

Patent

CA 2324110

A motor starter circuit providing recovery of the energy trapped in the motor windings when the supply voltage and current have opposite polarities by selectively controlling actuation of a plurality of high speed switches. The circuit, for use with a multiphase motor and power source that provides positive and negative voltage alternations which result in the generation of a load current in the motor having positive and negative alternations, includes a plurality of switch-diode combinations electrically configured such that for a given pair of supply voltage/load current polarities, only one diode of each combination may be forward biased.

L'invention concerne un circuit de démarreur de moteur permettant la récupération de l'énergie piégée dans les enroulements du moteur lorsque la tension et le courant d'alimentation ont des polarités opposées, par la commande sélective de plusieurs commutateurs à grande vitesse. Le circuit, à utiliser avec un moteur polyphasé et une alimentation produisant des alternances entre tension positive et négative qui induisent la génération d'un courant de charge dans le moteur, présentant des alternances positif négatif, comprend plusieurs combinaisons commutateurs-diodes configurées au plan électrique, de sorte que, pour une paire données de polarités de courant de charge/tension d'alimentation, seulement une diode de chaque combinaison puisse être polarisée en sens direct.

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