Overvoltage protector for rectifier/inverter bridges

Details Overvoltage protector for rectifier/inverter bridges Overvoltage protector for rectifier/inverter bridges

H - Electricity

02

M

318/108, 323/6,

H02M 7/12 (2006.01) H02H 7/122 (2006.01) H02M 5/458 (2006.01)

Patent

CA 1307317

ABSTRACT OF THE DISCLOSURE A device for overvoltage protection of rectifier/inverter bridges employing gate-controlled solid- state switches without zero diodes is disclosed. To protect at least the solid-state switches of the rectifier/inverter bridge against overvoltages, the device incorporates one or two overvoltage protector units which are activated when the voltage between any two protection connections in the main circuit exceeds the voltage across a capacitor of the overvoltage protector unit. A controllable switch, connected in parallel with the capacitor, is switched on when voltage between protection connections exceeds an excitation value and to turn off when the voltage falls below a turn off value.

599880

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