High-voltage power sources for powerful SHF devices with pulse-periodic output voltage

Abstract

Problems in the development of high-voltage power sources (HVPSs), magnetrons and gyrotrons, providing powerful SHF devices of two types with a continuous generating mode of SHF and periodic-pulse radiation have been considered in this paper. High-voltage power sources (HVPS) are made on the basis of a transistor–capacitor direct-voltage converter. It ensures parametric stability and safety of the HVPS–powerful SHF device system in standard operating conditions and the emergency-operation mode due to HVPS’s negative external characteristic of this type. Mathematical models of an HVPS–powerful SHF device loop describing processes at the various output-voltage pulse-forming stages of HVPS’ have been proposed and checked. An HVPS–powerful SHF device system using the control-current injection method has been analyzed. A feedforward compensator the parameters of which are determined by confinement conditions in the given ranges of output regulation limits and dynamic parameters of forming pulses has been constructed using the asymptotic-expansion method of log-magnitude curves. Taking into account the results that have been obtained, a number of HVPS devices have been produced for technological and research SHF complexes. Basic technical specifications of two developed HVPS devices have been provided as an example in this paper. The first HVPS, which has a medium-voltage power of 60 kW (25 kV/2.4 A), enables generation by an SHF radiation gyrotron of up to 20 kW of capacity in both continuous- and periodic- pulse modes with a maximum frequency of 10 Hz. The second HVPS, which has a medium-voltage power of 20 kW (5 kV/4 A), is intended for supplying power to an M-168 magnetron in the periodic-pulse generation mode of SHF radiation with a maximum frequency of 500 Hz.