Control electrical current leakage for electrosurgical generators.

摘要

It PRESENTS A control circuit leakage current (115) REGULATING THE POWER OUTPUT electrosurgical generator (20) to limit the amount of leakage current. LEAKAGE CURRENT monitored WITH A TRANSFORMER DIFFERENTIAL (90) having an input terminal (30) and return terminals (80) electrosurgical generator (20) COIL AS PRIMARY AND SECONDARY (96). A third coil (100) PRODUCE A control signal whenever CURRENT OUTPUT TERMINALS AND RETURN (30, 80) is different, thus indicating leakage current. The control signal is compared to a predetermined maximum SECURITY LEVEL leakage current. IF THIS predetermined level, a feedback loop electrosurgical generator CONTROL REDUCE POWER OUTPUT EXCEEDS to a level low enough to reduce the current LEAK within limits acceptable maximum.