scholarly journals Controlled Converter AC/DC through Small Input and Output Current

Author(s):  
K. Bhaskar, Et. al.

A high controlled converter one form to another form of supply like (AC/DC) is displayed in this article. The system is planned converter become 2 shifted fundamental restricted Converter in this work-controlled method for boosting its knowledge power. In these, the present weight of the guideline switches in the presented converter can be diminished. What is more, the present influx of yield and contribution to it in like manner can be lessened. Additionally, every progression fundamental circuit is showed converter is operated four changes to give execution the capacity of voltage guideline and force factor (pf). Frequency modulation with secured on and off time intermissions are discard, now this converter. A 1kW indicated the converter exists to see its display.

Author(s):  
G. A. Bolshanyn

Eight-poles of various designs, including an eight-terminal network with three input and five output terminals, are needed to replace some power objects. Especially when only the input and output characteristics of electrical energy are of interest. The paper presents the eightterminal network equations with three input and five output terminals, establishing a connection between these characteristics. Equations of the A-form establish a connection between the input and output voltages and currents; the B-form equations establish a connection between the output and input voltages and currents; G-form equations establish a connection between the input current, output voltages and output voltage, output currents; H-form equations establish the relationship between the input voltage, output currents and output current, output voltages; the Yform equations establish a connection between the input and output currents and the input and output voltages; The Z-form equations establish the relationship between the input and output voltages and the input and output currents. When implementing these equations, attention should be paid to the difference in the directions of the currents in each individual case.


In this paper, the design of a fuzzy logic controller based quad buck-boost converter with constant input and output current is presented. In contrast with the ordinary step-down-up converters the advanced converter with same duty cycle, a large limit of voltage conversion ratio could be acquired. A proposed converter is designed and studied with an intelligent controller i.e. fuzzy logic controller/FLC and differentiated with the ordinary Proportional-Integral /PIC controller. Finally, the analysis of the presented converter by employing MATLAB/Simulink, simulation results of the presented converter is recorded to substantiate the effectualness and rationality of the output voltage control of Quad buck-boost converter in both step-down-up mode and its comparative analysis is presented where the fuzzy logic has a minimum overshoot and settling time compared to regular PI controller.


Author(s):  
Amir Fathi ◽  
Sarkis Azizian ◽  
Nastaran Sharifan

Sensors are electrical-mechanical elements which are the interface between environment and electrical systems. The input of sensors is characteristics of the environment for example temperature, pressure and etc. and their output is a small electric voltage or current. Their job is to convert environment characteristics to an electric voltage or current at their outputs. Since the output current or voltage is very small, it must be amplified in order to be suitable for use in electronic systems. In this chapter we completely explain the design procedure and characteristics of sensor amplifiers. The important parameters of sensor amplifiers are input and output resistance, gain, unity gain bandwidth and etc. One of the most important characteristics of amplifiers is the linearity of amplification in a way that it must have uniformity for all amplitude voltages or currents in all frequencies of the bandwidth. For this purpose, first the operational amplifier is completely discussed, then the linearity of feedback operation will be explained.


2013 ◽  
Vol 834-836 ◽  
pp. 1101-1104
Author(s):  
Jun Li ◽  
Jun Hong Zhang ◽  
Wei Gao

Bi-frequency modulation can effectively solve the contradiction between high frequency and efficiency, but it will bring the problem of the current ripple. In this paper, use Buck circuit as the prototype, adopt phase shift parallel technology, make theoretical analysis and simulation studies on the bi-frequency circuit that the high and low frequencies units are operating in a state of continuous inductor current. Analysis and simulation results show that phase shift parallel can effectively inhibit the output current ripple. [email protected] [email protected] [email protected]


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