Electronic protective circuit

Details Electronic protective circuit Electronic protective circuit

H - Electricity

02

M

321/91

H02M 7/155 (2006.01) H02H 7/125 (2006.01)

Patent

CA 1171905

Attorney's Docket 6739 CAN INVENTOR: FRANZ MAIER INVENTION: ELECTRONIC PROTECTIVE CIRCUIT ABSTRACT OF THE DISCLOSURE The electronic protective circuit interrupts current flow from an alternating-current supply through a rectifier circuit equipped with controlled valves to an inductive load and deenergizes the inductive load. An extinguishing circuit contains an extinguishing thyristor and a series connected capacitor. At least one switching thyristor is connected between the alternating-current supply and the inductive load connected in parallel with the extinguishing circuit. A deenergization circuit is connected with the inductive load. It contains a resistor and controlled valve connected in series. The deenergization circuit and extinguishing circuit contain a common current path, in which the extinguishing thyristor is simultaneously used as the controlled valve for the deenergization circuit and wherein the remaining circuit of the deenergization circuit contains a diode poled in series with the extinguishing thyristor.

370163

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