H - Electricity – 02 – H
Patent
H - Electricity
02
H
H02H 3/26 (2006.01) H02H 7/06 (2006.01) H02H 7/12 (2006.01) H02H 9/04 (2006.01)
Patent
CA 2072296
In a switching circuit having multiple parallel circuits having at least one switching element having a characteristic of firing by themselves due to over-voltage, this invention is to provide a switching circuit protection apparatus which prevents the flowing of a current concentrated in the first of the parallel circuits to fire due to over-voltage. The apparatus in this invention comprises a switching circuit composed by connecting in parallel multiple circuits having at least one switching element having a characteristic of self-firing due to over-voltage, detecting means for detecting the self-firing of the switching element in the switching circuit, and firing means for applying an firing pulse to all the switching elements in response to an output signal applied from the detecting means and firing all the switching elements at the same time by the firing pulse.
Dans un circuit de commutation comportant plusieurs circuits parallèles, dotés d'au moins un élément de commutation et ayant la particularité de s'autoenclencher en condition de surtension, la présente invention consiste en un appareil de protection de circuit de commutation ayant pour effet d'empêcher que le passage d'un courant concentré dans le premier circuit parallèle ne provoque l'enchenchement de ce circuit en cas de surtension. L'appareil visé par l'invention comprend un circuit de commutation qui intègre plusieurs circuits parallèles dotés d'au moins un élément de commutation et ayant la particularité de s'autoenclencher en condition de surtension, un dispositif qui détecte l'autoenclenchement de l'élément de commutation ainsi qu'un dispositif d'enclenchement qui fonctionne au moyen d'une impulsion envoyée à tous les éléments de commutation lorsque le dispositif de détection émet un signal de sortie. L'impulsion provoque l'enclenchement simultané de tous les éléments de commutation.
Kabushiki Kaisha Toshiba
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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