Figure 1-1 Transformer Equivalent Circuit Introduction Experienced SwitchMode Power Supply designers know that SMPS success or failure depends heavily on the proper design and implementation of the magnetic components. Parasitic elements inherent in high frequency transformers or inductors cause a variety of circuit problems including: high losses, high voltage spikes necessitating snubbers or ...

In this paper we propose transformer-based solutions to several power quality problems. Elsewhere we have shown how to solve the acoustical noise emission problems. In this paper we introduce toroidal transformers with reduced inrush currents, transformers with reduced electromagnetic emissions, and other transformers useful to reduce the transfer of harmonics. With the low-inrush transformers ...

Design of a 1200 kV power transformer is a real challenge for designer from dielectric point of view. It is possible to design a more compact transformer meeting even higher insulation levels with lesser insulation content. This has been possible with the introduction of sophisticated Computer-Aided Electrostatic Field Analysis. Analysis of the Lead Exit assembly of 1200 kV HV is presented. Two...

Transformers are regarded as crucial components in power systems. Due to market globalization, power transformer manufacturers are facing an increasingly competitive environment that mandates the adoption of design strategies yielding better performance at lower costs. In this paper, a power transformer design methodology using multi-objective evolutionary optimization is proposed. Using this m...

A conventional high power DC power supply systems consist of a three-phase diode rectifier followed by a high frequency converter to supply loads at regulated DC voltage. These rectifiers draw significant harmonic currents from the utility, resulting in poor input power factor. In this paper, a DC power supply based on dual-bridge matrix converter (DBMC) with reduced number of switches is p...

Three phase supply is available in the generating station or grid, were as nine phase supply is required for many industrial applications such as, aerospace, railway and automobile applications. There are different methods in which we can convert 3 to 9 phase using 18-Pulse Converter, Carrier Based PWM Technique, multilevel converter and Multiphase Transformer. The above said methods which are ...

We consider the possibility of passing high-frequency signals past power transformers forming part of an electrical grid. We first model a transformer, including its laminated core, to obtain asymptotic behaviour of currents and voltages in the secondary circuit. Having got this we are able to determine the effects of different by-pass mechanisms which might be tried to get the high-frequency s...

Design and optimization of a magnetic fluid cored transformer are studied for high frequency applications. An easy cheap core is designed used to decrease the eddy current loses, thereby low conducting paramagnetic features added. The exhibits both solid characteristics exerting modes in due iron powder inside. finite element analysis simulations performed via COMSOL Multi-physics package diffe...

The systolic array is frequently used in accelerators for neural networks, including Transformer models that have recently achieved remarkable progress natural language processing (NLP) and machine translation. Due to the constraints of FPGA EDA (Field Programmable Gate Array Electronic Design Automation) tools limitations design methodology, existing deployment often cannot achieve high freque...