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A cycloconverter with a tank circuit for induction heating which can deliver power to load keeping an input displacement factor at 1.0 is proposed in this paper. Static characteristics are analyzed using the switching functions and the mode functions and operation regions in which the input displacement factor is kept at 1.0 are found. A starting method which uses only a gate pulse sequence for thyristors...
This paper describes a control scheme of a high frequency, high power current source inverter using static induction transistors to suppress the surge voltage and to reduce the switching loss during the commutation of current. The inverter is operated at a leading power factor, which requires the phase angle of the output current to be adjusted to each specific load point by the controller. The stable...
Generalized root-loci techniques, developed in the mid-70's for squirrel cage motors, have been extended to wound rotor, slip energy recovery systems (static Scherbius drive). In this paper, the influence of a feedback control loop on these root-loci is considered. General conclusions on Scherbius drive dynamics as well as some experimental verifications are also included.
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