CONTROL CIRCUIT FOR RELAY

摘要

PROBLEM TO BE SOLVED: To release melt-sticking of contacts certainly in a short time by applying effective impact pulses to a relay when multi-sticking is generated. SOLUTION: This control circuit detects melt-sticking of contacts of a relay 2 and feeds an output signal to a microcomputer 1, which is installed to control the relay 2, and the first driving means 6 is connected with the output port of the microcomputer 1 while the second driving means 7 is furnished at another output port so that the relay 2 is put in parallel drive. Thereby effective impact pulses can be applied by driving alternately the first and second driving means when the contacts have gone in melt-sticking, and such an occurrence can be released certainly and quickly.