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The paper presents the method of digital modelling of process of switching on by vacuum switch in capacitive circuits. Currently, there are few descriptions of vacuum switch models used for capacitive circuits switching on. More often researchers focus on vacuum switch models used for switching of the circuits (also previous works of the Authors) and even more often models used for switching of the...
A novel buck-boost dc-dc converter with high voltage step-up and step-down ability has been introduced in this paper. There are two switches in this converter, of which the sources are connected together and also connected to the ground of the input voltage source. Hence, there is no need for floating gate driver. In addition, the voltage stress of one of the switches is lower than the existing quadratic...
A low power switching method for SAR ADC is proposed in this paper. With this switching method the comparator first compares the sampled input voltage with Vref/2 to generate the MSB and determine whether to use Vref/2 or Vref as the comparator reference voltage in the following conversation steps, and the DAC with a split capacitor array uses Vref/2 as the reference voltage to generate the remaining...
The design of PWM sliding mode control for a novel frequency conversion circuit which called boost matrix converter is presented. The general situation of sliding mode control strategy and frequency converters are firstly introduced. The specific analysis of boost matrix converter and the derivation process of PWM sliding mode controller are clarified afterwards. Finally the system simulation result...
Optimal reactive power compensation has become an important issue to Indian power system due to initiatives taken towards national grid formation in the country. Presently new grid and southern grid are running in asynchronous mode. Central Transmission Utility (CTU) has forced the regional or state grids to maintain their reactive power compensation as per the requirement of grid as specified in...
This paper presents the design and implementation of a modular single phase multilevel inverter using the asymmetric cascade multilevel converter type. The converter output allows 7, 15 and 31 levels and use the step modulation strategy. The selective harmonic elimination (SHE) technique was used for the computation of the firing angles. All the results were simulated in MATLAB professional software...
Pulse electric field (PEF) is an important technique in food treatment to inactivate microorganism. This PEF is an alternative method from conventional thermal methods in food sterilization industry. The role of PEF is to maintain the foods flavor for a small difference range of temperature to find fresh quality of nutritious foods. The new topology for power electronics converter with Marx configuration...
The Flywheel Energy Storage System (FESS) based on the Z-source inverter is proposed in this paper. The proposed system can boost and generate a desired output voltage efficiently when low voltage of the generator is introduced due to the low flywheel speed. The topology of the system is introduced and the control strategies for the system are analyzed. Z-source inverter, which is used in Flywheel...
The control scheme is presented to aim at the speed control of single phase induction motor. It consists of fuzzy controller, two tracking differentiators, and speed estimator. At first, The design of rotor speed estimator is carried on, which the rotor speed can be obtained according to the general mathematic model of single phase induction motor and rotor estimating speed be used instead of rotor...
This work presents the analysis and performance of connecting two wind power generation systems with the energy storage at the dc side. Energy storage is desirable to be installed to keep constant output from the wind power generation system. The DC connection of two wind power generation system helps to exchange power between the two systems and can suppress the disturbance of the output power to...
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