Modeling Under MATLAB by ANFIS of Three-Phase Tetrahedral Transformer Using in Microwave Generator for Three Magnetrons Per Phase

Abstract

This work deals with the modeling of a new three-phase tetrahedral transformer of HV power supply, which feeds three magnetrons per phase. The design of this new power supply is composed of three single-phase with magnetic shunt transformers coupling in star; each one is size to feed voltagedoubling cells, thereby feeds a magnetron. In order to validate the functionality of this power supply, we simulate it under Matlab-Simulink environment. Thus, we modeled nonlinear inductance using a new approach of neuro-fuzzy (ANFIS); this method based on the interpolation of the curve B(H) of ferromagnetic material, the results obtained gives forms of both voltages and currents, which shows that they are in accordance with those of experimental tests, respecting the conditions recommended by the magnetron manufacturer

Optimization of a Three-Phase Tetrahedral High Voltage Transformer used in the Power Supply of Microwave

“…Fig. 4 and 5 give the different currents/voltages curves of magnetrons, diodes, capacitors and transformer secondary obtained in a previously study [4]. These curves will be the comparison tool between the optimized and non-optimized power supplies.…”

“…Unlike conventional transformers, this special transformer contains intermediate magnetic shunts between the side columns and the central column, which allows to ensure the stabilization of the current in the magnetrons by the saturation of its magnetic circuit. From the different electrical and magnetic equations already developed of this transformer [4], each phase is modeled as a quadruple in π, composed of three non-linear inductances on the primary, secondary and shunts sides. These inductances have a section S, a length ℓ and a characteristic which can be determined from the relation and also the curve B(H) of the material transformer [6] [7].…”

“…Unlike the old power supplies already developed, whether single-phase magnetron 800Watts-2450Mhz or three-phase of three magnetrons 2400Whats-2450Mhz [1][2][3]. This new technology of nine magnetrons is optimized compared to that previously developed [4]. It offers an identical microwave power of 7200Watts-2450MHz.…”

Modeling of three-limb three-phase transformer relates to shunt core using in industrial microwave generators with n=2 magnetron per phase

“…The aim of this section is to discuss a duo electric-magnetic circuit model of three-phase transformer HV power supply for microwave generators with two magnetrons per phase. The model uses a new shelltype transformer with a magnetic shunt [15][16][17]. Figure 1 presents the geometric shape of the magnetic circuit of this transformer, each phase contains two windings (primary and secondary) placed in the middle limb.…”

“…The (15), (17) Dividing path (JIHKJ) of an iron core in three partial paths, each of which has a uniform flux, the equation becomes:…”