Patent ID: 11885315
Assignee: THRUSTME
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  H  B | IPC B  F  H

Claim 0:
1. A radio-frequency plasma generating system comprising a radio-frequency generator (1) and a plasma source (2), the radio-frequency generator (1) being inductively or capacitively coupled to the plasma source through a resonant electric circuit (4), the radio-frequency generator (1) having an input (15) to receive direct current power from a direct current power supply (5) and an output (17) for providing radio-frequency power at a frequency f to the plasma source (2),
wherein the radio-frequency plasma generating system comprises:
means for measuring an efficiency of conversion E of direct-current power to active radio-frequency power absorbed by a plasma, and
means for adjusting the frequency f as a function of the measured efficiency of conversion E so as to maintain the efficiency of conversion E in a predetermined range within a radio-frequency plasma operational range.