Radio frequency dielectric heater

Details Radio frequency dielectric heater Radio frequency dielectric heater

1984-06-11

1985-07-23

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1077, H05B 650

Patent

active

045310386

ABSTRACT:
An RF dielectric heater has a variable power output and stable output frequency. A power controller provides variable phase angle control of three-phase AC power. A delta-wye power transformer is coupled between the power controller and a rectifier circuit. The rectifier circuit converts the stepped up, high voltage AC power from the transformer into a DC power output. An RF oscillator circuit driven by the DC power output is coupled to a tank circuit. A load, comprising RF electrodes, create an RF field to heat material passed through the field. The RF electrodes are coupled to the tank circuit in a manner characterized by the absence of any tuning components.

REFERENCES:
patent: 2454618 (1948-11-01), Stone
patent: 2498760 (1950-02-01), Kreithen
patent: 2661425 (1953-12-01), Mittelmann
patent: 2705286 (1955-03-01), Kinn
patent: 3551632 (1970-12-01), Geisel
patent: 4189685 (1980-02-01), Doss
patent: 4205210 (1980-05-01), Salway-Waller et al.

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