A New Validation Approach of a New Three-Phase High Voltage Power Supply for Microwaves Generators with one Magnetron by Phase

In order to validating the new three-phase High voltage power supply for microwave generators with one magnetron by phase, this paper presents a new validation approach to evaluate the proposed model with several evaluations. This approach is based on the calculation and measurement of the performance and the power factor of this new three-phase power supply, also the study of the operation of this new system in case of failure. The design of this power supply is composed of new three-phase transformer with magnetic shunt, supplying by phase a voltage doubler cell composed of a capacitor and a diode. Each cell in turn, supplies a single magnetron. In this paper we have presented the new three-phase transformer by its equivalent model; it’s a π  quadruple  model composed  of  storable  inductances  able  to translating the nonlinear saturation phenomena for stabilization of  the  magnetron  current. The voltage and current curves obtained by simulation with MATLAB SIMULINK are in good conformity with those obtained by experimental of conventional power supply using a single phase transformer for one magnetron. The same curves will allow us to plot the instantaneous power absorbed by each magnetron. This leads to determine the average power emitted by each magnetron, and establish the balance of the power microwave generator by computing its performance which is compared to that obtained from experimental. After that we will compute the power factor of this power supply and we will study its operation in case of failure of one or two magnetrons

Breakdowns' Diagnosis of A New Character Three-Phase High Voltage Power Supply for Industrial Microwave Generators with N=2 Magnetrons per Phase

This paper treats the modelisation of a new three phase character high voltage supply (HV) for industrial microwave generators with N=2 magnetrons per phase. This alimentation is based on the presentation of an equivalent p circuit model of a newly dimensioned high voltage transformer. Each phase of the three phase system supplies two parallel cell voltage doublers and current stabilizer. Each of these cells in turn supplies one magnetron 800Watts / 2.45GHz. This power supply is a star connection of three identical models of the single-phase power for N=2 magnetrons. The simulation under EMTP (Electro Magnetic Transients Program) in nominal conditions allows concluding that theoretical results are adjacent to the experimental measurements. Furthermore, a failure study of six magnetron of the microwave generator is also processed. The results permit to observe that the interaction between magnetrons dosn’t influence the nominal operation of the system

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

This paper describes the development and implementation of a digital simulation model of a three-phase transformer relates to shunt core transformer, which used to drive magnetron tubes in the microwave. The focus of this study is based on modeling of a new shell-type of three limbs three-phase transformer. The model uses to feed two magnetrons instead of one magnetron per phase. The proposed model is established on the simultaneous analysis of a duo electromagnetic lumped component equivalent circuit. This latter was implemented in a MATLAB environment under rated conditions. The results obtained from the application of the analytical method are provided results in conformity to the experimental tests in the case of single phase high voltage power supply for one magnetron

Modeling of New Three-Phase High Voltage Power Supply For Industrial Microwave Generators With One Magnetron Per Phase

This original work treats the feasibility study of a new HV power supply with a three-phase character, supplying a magnetron 800 Watts-2450 MHz per phase, for industrial microwave generators from the modeling with the EMTP code of a single-phase HV power supply for one magnetron. The exploitation of the modeling, with EMTP code, of the power system for one magnetron is to use, essentially, the developed model of its transformer, which is a π quadruple, consisting of saturable inductances able to translate the non-linear phenomena of saturation, while guaranteeing the stabilization process of the magnetron current. Using the new power supply device with a three-phase character and the EMTP code, the feasibility study, in nominal mode, of the three-phase power supply was performed satisfactory. The analysis of the results obtained helped to confirm the possibility of functioning of this new system without interaction between magnetrons, which provides, relative to the current device, gains of size, volume, cost of implementation and maintenance and makes this new system more economical, while guaranteeing the regulation process of the current in each magnetron.DOI:http://dx.doi.org/10.11591/ijece.v3i2.240

Modeling of a New High Voltage Power Supplyfor Microwave Generators with Three Magnetrons

This original work treats the modeling of a new type of HV power supply with several magnetrons (treated case   N=3 magnetrons).The design of this new power supply uses a new single-phase high voltage transformer with magnetic shunts supplying three doublers voltage cells, each one composed of a capacitor and a diode. Each cell supplies in its turn one magnetron. The π equivalent model of the transformer is developed taking account the saturation phenomena and the stabilization process of each magnetron current. The model of the transformer is based on the determination of the analytical expressions of the non linear inductances that can be stored from the fitting of the magnetization curve B (H) of material used. The resulting model will be implemented under Matlab-Simulink code. The simulation results are in good agreement with the experimental measurement for one magnetron, thus provides, relative to the current device, gainsof volume, weight and cost of all power supply with respecting the conditions recommended by the constructor of magnetron current: Ipeak<1.2 A, Imean≈ 300 mA.DOI:http://dx.doi.org/10.11591/ijece.v3i2.223

Modeling of New Single-Phase High Voltage Power Supply for Industrial Microwave Generators for N=2 Magnetrons

In this paper, we propose to study the modeling and the simulation, using the EMTP code, of the operation in nominal mode of a new high voltage power device, based on the same use principle of an only transformer with shunts, but this time for several magnetrons. This modeling can lead to the determination of the construction parameters of the new transformer, to ensure the correct operation in nominal mode of the new power supply, while respecting the control criterion of the current in each magnetron. The knowledge of these parameters (size of the magnetic circuit, the magnetic quality, the air gap, the size of the shunt and the number of turns, etc .....), determines the cost of the dimensioned transformer for its realization. In the following, we will treat all possible states for operation of this new power supply with two magnetrons (Power supply for two magnetrons: case of two magnetrons in service, case of one magnetron in service and one magnetron in failure, case of tow magnetrons in failure). This provides relative to the current device gains of space, volume, cost of implementation and maintenance.DOI:http://dx.doi.org/10.11591/ijece.v4i2.568

Failures’ Study of a New Character Three-Phase High Voltage Supply for industrial Microwave Generators with one magnetrons per Phase

This article treats the development of one of the equivalent electrical models for a single phase power supply for one magnetron; in particular that of its own high voltage (HV) transformer newly dimensioned. This single phase system supplies a voltage doubler and current stabilizer circuit, which supplies a single magnetron. Then, by star connecting the three identical models of the single-phase power supply for one magnetron, we obtain a new character three-phase high voltage power supply for industrial microwave generators with one magnetron per phase. The simulation with EMTP (Electro Magnetic Transcients Program) in nominal operation has given the theoretical results close to the experimental measurements. Finally, the magnetrons’ failure of the microwave generator was also treated and allowed to observe the interaction’s influence between magnetrons; also the regulation of the anode current has been achieved successfully

Improved Optimization of the Nominal Functioning of a New Global High Voltage Power Supply N=2 Magnetrons for Microwaves Generator

This work deals with the energetic validation of a new optimized high voltage power supply for micro-waves generators with N=2 magnetrons that are used as an energy source in industrial applications. In this article, we will apply an optimization strategy that aims at improving the nominal functioning of the optimized power supply with N=2 magnetrons. Unlike research work already done an this topic, this article treats the correct energetic functioning of the two magnetrons. An equivalent scheme in π of the transformer model is presented with the geometrical parameters taken as reference. This model has been tested with the help of the simulation software Matlab-Simulink close to nominal operation. The theorical results compared to the experimental measures are in good conformity. Following that, we will validate the functioning of the new optimized power supply by calculating the average power and then comparing it with that which was found for the power supply with geometricals parameters taken as reference.DOI:http://dx.doi.org/10.11591/ijece.v2i5.158