Patent ID: 9214803
Filing Date: 2015-12-15
Classification: A01D,F02D,H02H,H02P

Abstract:
1. A piece of outdoor power equipment comprising: an alternator, an engine, and an alternator overvoltage protection circuit; said alternator is connected to said engine; said alternator overvoltage protection circuit comprising a conditioner section, a trigger section, a drive section, and a disable section; said conditioner section is connected to said alternator rotated by said engine of said piece of outdoor power equipment, and said disable section is electrically connected to a load; said trigger section is located between and electrically connected to said conditioner section and said drive section; said drive section is located between and electrically connected to said trigger section and said disable section; said conditioner section is configured to condition voltage output received from said alternator, and output said conditioned voltage to said trigger section; said trigger section is configured to receive said conditioned voltage from said conditioner section; said trigger section is further configured to output current to said drive section when said alternator output voltage exceeds an alternator overvoltage threshold, wherein said trigger section does not output current to said drive section when said alternator output voltage does not exceed said alternator overvoltage threshold; said drive section is configured to activate said disable section when said drive section receives current from said trigger section; and said disable section is configured to divert at least a portion of current away from said load to a ground of said alternator overvoltage protection circuit through a low impedance path when said disable section is activated, thereby disabling said engine.