POWER MONITORING CIRCUITRY AND METHOD FOR REDUCING LEAKAGE CURRENT IN RF GENERATORS

摘要

An electrosurgical unit having power monitoring circuitry for reducing leakage current in an electrosurgical unit. The electrosurgical unit includes a power source configured to produce direct current, an RF waveform generator configured to convert the direct current into an RF signal, a voltage sensor configured to measure DC input voltage to the RF waveform generator, a current sensor configured to measure output current feedback, and a processor. The processor is configured to estimate output voltage feedback based at least upon the measured DC input voltage and the measured output current feedback, and output a control signal to control the DC input voltage to the RF waveform generator, the control signal based at least upon the estimated output voltage and the output current feedback.

主权项

1. An electrosurgical unit comprising:
a power source configured to produce direct current; a radiofrequency (RF) waveform generator configured to convert the direct current into an RF signal; a voltage sensor configured to measure a DC input voltage to the RF waveform generator; a current sensor configured to measure an output current feedback; and a processor configured to:
estimate output voltage feedback based at least upon the measured DC input voltage and the measured output current feedback; andoutput a control signal to control the DC input voltage to the RF waveform generator, the control signal based at least upon the estimated output voltage and the output current feedback.