Control circuit for electromagnetic hammer - has charging and discharging thyristors and delay stage interconnected by multiple transformer arrangement

Abstract

Abstract Translated from French L'INVENTION CONCERNE UN APPAREIL DE PERCUSSION ELECTROMAGNETIQUE AVEC UN ELECTRO-AIMANT DONT LE TUYAU FAIT PARTIE D'UN ENSEMBLE MOBILE COMPRENANT UN OUTIL DE PERCUSSION, LE BOBINAGE DE CET ELECTRO-AIMANT ETANT ALIMENTE PAR UN SYSTEME A CONDENSATEUR ET THYRISTORS ACCUMULANT DE L'ENERGIE PENDANT DES TEMPS RELATIVEMENT LONGS ET CAPABLE DE LA RESTITUER BRUTALEMENT. LA PRESENTE ADDITION FOURNIT UNE VARIANTE SUIVANT LAQUELLE, A L'INVERSE DE CE QUI EST DECRIT DANS LE BREVET PRINCIPAL, UNE IMPULSION DE COMMANDE UNIQUE PROVOQUE UNE SEQUENCE COMPRENANT D'ABORD LA CHARGE, PUIS LA DECHARGE DES CONDENSATEURS, CE MODE DE FONCTIONNEMENT PRESENTANT L'AVANTAGE, PENDANT LES TEMPS DE REPOS, DE NE LAISSER QU'UNE TENSION RESIDUELLE FAIBLE AUX BORNES DES CONDENSATEURS. APPLICATION A LA REALISATION DE MARTEAUX ELECTROMAGNETIQUES. THE INVENTION RELATES TO AN ELECTROMAGNETIC PERCUSSION APPARATUS WITH AN ELECTRO-MAGNET WHOSE PIPE IS PART OF A MOBILE ASSEMBLY INCLUDING A PERCUSSION TOOL, THE WINDING OF THIS ELECTROMAGNETIC MAGNET BEING POWERED BY A CONDENSER AND THYRISTOR SYSTEM. ENERGY DURING RELATIVELY LONG TIMES AND CAPABLE OF BRUTALLY RESTITUTING IT. THIS ADDITION PROVIDES A FOLLOWING VARIANT IN WHICH, IN THE REVERSE OF WHAT IS DESCRIBED IN THE MAIN PATENT, A SINGLE CONTROL PULSE CAUSES A SEQUENCE INCLUDING FIRST THE LOAD, THEN THE DISCHARGE OF THE CAPACITORS, THIS MODE OF OPERATION PRESENTING THE 'ADVANTAGE, DURING THE REST TIME, OF LEAVING ONLY A LOW RESIDUAL VOLTAGE AT THE CAPACITOR TERMINALS. APPLICATION TO THE REALIZATION OF ELECTROMAGNETIC HAMMERS.

Inventors

• 👤 Georges Jacquemet

Bibliographic Details