Conventional FLUX COMPRESSION GENERATORs (FCG"s) are used to generate high power ‎DC pulses. A new kind of (FCG"s) with series capacitance called Capacitive FLUX ‎COMPRESSION GENERATOR (CFCG) will be introduced and explained in this paper. This ‎new kind is used to generate modulated high power pulses. There are some problems ‎to establish a capacitance in high power and high frequency applications. In the ‎present paper several practical methods will be addresed to make capacitance in high ‎power and high frequency applications‎‏.‏

The calculation of stray capacitance (SC) between adjacent coils as series capacitance and between coil and liner as shunt capacitance are very important to consider in the design of a magnetic FLUX COMPRESSION GENERATOR (MFCG). This paper presents an approach to calculate the equivalent stray capacitance (SC) of n-turn of the helical FLUX COMPRESSION GENERATOR (HFCG) coil with multi-layer conductor wire filaments (MLCWF) in the form of rectangular cross-section. This approach is based on vespiary regular hexagonal (VRH) model. In this method, wire filaments of the GENERATOR coil are separated into many very small similar elementary cells. By the expanded explosion in the liner and move explosion to the end of the liner, the coil turns number will be reduced. So, the equivalent SC of the HFCG will increase. The results show that by progress of explosion and decrease of the turns’ number in the GENERATOR coil; total capacitance of the GENERATOR increases until the explosion reaches to the second turn. When only one turn remains in the circuit, a decrease occurs in the total capacitance of the GENERATOR.

Design methodology of a compact size charging system for emergency uses is investigated in this paper. The system consists of a gearing unit, a GENERATOR, a charger, and some battery cells. The system’ s electrical model has been introduced and a 3-phase axial FLUX surface mounted PM GENERATOR with a concentrated winding is picked as a generation unit. The basic equations needed for the GENERATOR design are presented as well as the general considerations and constraints for the designs. After validating the design equations using Finite Element Analysis, sizing equations are used to design different machines. The resulted designs are compared based on main characteristics including output power, power delivered to the battery, and GENERATOR efficiency. Finally, the performance of the valid designs in the system model is analyzed over a wide speed range. The proposed methodology could be used to design portable power generation units for such applications as rescuing, power system outage, camping, and so on.

Compactness and lightness make high-speed axial-FLUX machines eligible for distributed generation application with microturbine. In a high-speed GENERATOR driven by micro-turbines, the rotor speed is normally above 30, 000 rpm and may even exceed 100, 000 rpm. The frequency for FLUX variation is more than 1 kHz. Therefore, designing such a highspeed GENERATOR is quite different, in mechanical and electromagnetic respects, from designing conventional GENERATORs with low speed and low frequency. Important considerations in designing high-speed axial-FLUX GENERATORs (HSAFG) for microturbine are discussed in this paper. Results of the efficiency sensitivity versus air gap of the machine are also presented.

High power pulses with low widths have many applications in radiation GENERATOR devices as flash radiography and high power microwave GENERATORs. One of the COMPRESSION methods of high power pulses is magnetic pulse COMPRESSION. In this paper a Tesla GENERATOR with saturated core which produces a 200k V voltage pulse has been designed and then the effect of saturation of the core in the COMPRESSION of the output pulse using Proteus and CST EM Studio codes was studied. Our studies showed that with saturation of the transformer’s core, the magnetic permeability and hence the inductance of the transformer’s coils will decrease and consequently the frequency of current oscillations in the transformer will momentarily increase where it will result in the decrease of the output pulse width.

In this paper, a novel structure of a axial FLUX switching machines for use in wind speed turbines at low speeds has been proposed, which in addition to the previous advantages, has a simple and economical design for the production of this type of machines. In this proposed machine, the magnets are placed on the surface of stator, and the three-phase winding is located in the space between the magnets. After designing according to the criteria like increasing electromotive force, reducing the cogging torque and reducing the total harmonic distortion, using the design of experiments and the surface response method combined with the finite element software, the appropriate dimensions are selected and the machine is optimized. To test the design accuracy, a prototype model is also made.

The Hybrid Excitation FLUX Switching GENERATOR (HEFSG) has gained significant popularity in recent times owing to its relatively simple remarkably efficient topology. To optimize the performance of the GENERATOR, recent advancements and emerging patterns in mathematical modeling and software simulation, along with the utilization of optimization techniques, have facilitated the development of a novel methodology for electrical machine design. This study investigates the configuration and optimization of a Hybrid Excitation FLUX Switching GENERATOR, focusing on the rotor, armature coil, and field excitation. The optimization process involves multiple sequences for each component, employing the Local Optimization Method as an iterative approach to determine the optimal sequence that yields the highest output efficiency. Through the investigation of six rotor sequences, two armature coil sequences, and two field excitation coil sequences, a detailed optimization process was conducted. Consequently, the final output voltage of the HEFSG gains a 1.10% increment of voltage compared to the initial outcomes. Several sequences have influenced the output voltage performance of the GENERATOR during the optimization process. Therefore, modifications to the design of the arrangement contribute to the expansion of the operational range of the GENERATOR.

Fast neutron FLUX (14.8 MeV) of a neutron GENERATOR has been measured by activation technique. The measurements performed using Cu and Ni threshold detectors. 62CU and s7Ni were produced through 63CU (n, 2n) 62Cu and 58ni (n, 2n) 57Ni reactions. They decay by emitting 511 keV and 1377 keV gamma rays, respectively. The half life of 62CU is 9.74 min and that of 57Ni is 36 hours. The FLUX of neutron has been calculated by measuring the activity after the irradiation time. Gamma spectroscopy of the activated foils was performed using a HPGe detector. By employing this technique the neutron FLUX of 2.64x107±3% n/s was obtained for 60mA deuteron of 110keV energy, bombarding a solid target of 3H.

Machines with permanent magnet excitation have higher efficiency and more reliability than machines with electric excitation. Among the permanent magnet machines, the crossover machines have a higher ratio of power to volume and electric torque to volume, so that at the same power, their size is smaller than the usual permanent magnet machines. And this is the reason why researchers have paid attention to crossover machines in recent years. Cross-phase GENERATORs can be made with a smaller pole pitch than other machines. These features make these machines have a higher power density than other permanent magnet machines. The copper winding of the crossover GENERATORs is simple, and their passive copper winding is considerably less than other machines, so the mass of active materials required to produce power and electric torque can be less than other machines. In other words, a smaller volume of active materials per unit of electric torque can be obtained by these machines. Therefore, this GENERATOR creates high power and torque by creating a large number of poles and a small pole pitch, and it can be a suitable option for use in the production of electrical energy from wind power, especially at low wind speeds. The lack of a suitable dynamic model and the application of this GENERATOR, dynamic modeling and simulation, are necessary to analyze its performance under different conditions. Therefore, this article presents a dynamic model for this GENERATOR to be connected to the wind turbine, and then simulates the wind turbine based on this GENERATOR by simulating the turbine-GENERATOR system.

Coreless axial FLUX permanent magnet (PM) machines (AFPM) have attracted significant interest over the last decades as an ideal candidate for a wide range of applications. This is generally due to their advantages, such as the high torque density, high power density, and the light weight. This paper investigates the performance of a coreless axial FLUX-switching GENERATOR (AFSMG) with improved torque characteristics. The inherent feature of the axial FLUX-switching machines is the high cogging torque. Hence the main advantage and the novelty of this research is addressing a suitable key for its torque characteristics challenges. In this regard, a comprehensive study is done on rotor tooth shape. First, the geometry and the shape of the rotor tooth are optimized, and then the skewing technique is applied to minimize the cogging torque and improve the total harmonic distortion. Finally, the cogging torque and the THD are calculated in the primary design and the optimal design. The Taguchi method is utilized to improve the primary model. A comparative analysis of the primary and optimized model is carried out, which indicates the better performance of the optimized design. Furthermore, the 3D finite element method is applied to verify the results of the presented model.