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DC-DC converters are used as secondary power sources. There are many different topologies of such converters, each of which has its own advantages and disadvantages. It is also possible to combine them in order to ensure a more reliable power supply. This paper presents the new scheme of multiple port DC-DC converter and its simulation results in three operating modes.
This paper presents a comparative analysis of the energy characteristics of two topologies multilevel semiconductor converters: a three-level voltage source inverter and two-zone current source inverter. Computer simulation was used to obtain energy and control characteristics of studied converters. Harmonic distortion was used as the primary evaluation criteria to compare the quality of output voltage,...
Growth of a number of different electrical equipment on board of autonomous objects requires the creation of new high reliability power supply systems operating even in an emergency case. This paper presents a new version of implementation of the uninterruptible power system (UPS) based on parallel operation of AC/DC and DC/DC converters. Such structure allows to supply the system from two independent...
This paper considers an example of a control system for semiconductor converters with pulse-width modulation (PWM). Also the structure of the control system and an example of the proposed system implementation for a DC/DC converter are outlined.
The advances of digital control systems require a new approach for design and development of power electronics devices. Modern simulation methods allow creating control systems of power converters based on their real microprocessor implementation. Thus, a digital control algorithm of device can be completely recreated, debugged and verified in the model. This paper proposes the control algorithm for...
In this paper detailed analysis of the electromagnetic processes in the new multizone current source inverter was carried out, resulting in the analytical ratios for the qualitative evaluation of the load currents, depending on the relative resistance of the load, as well as an external characteristics of converter by using the method of differential equations algebraization was obtained [1]. The...
This paper describes the implementation of principles of the construction Voltage Source Inverter (VSI) with superhigh-frequency pulse-width modulation for autonomous power generation system and the structure of the hybrid system to operate this inverter is shown. The distinctive feature consists in a modular principle of construction high-frequency units of the power circuit with working frequencies...
The growth of power consumption of autonomous objects requires creation of new powerful and energy-efficient converters. This paper describes a new version of the autonomous power generation system alternating current and constant frequency with better energy-efficiency based on three-level converters. The results of computer simulation in the software package POWERSIM 9.0 are presented in the work...
This paper proposes a novel inverter for four-wire systems. The number of used transistors is reduced in a Z-source inverter with neutral point as compared with known schemes of Z-source inverter for four-wire systems. It increases reliability and efficiency. The scheme operation is verified by simulation.
Voltage inverter is one of the basic components of an autonomous AC power supply systems. This article is a comparative analysis of two-level and three-level voltage source inverter schemes. The analysis includes calculation of the efficiency and estimating the weight and size of converters compared. Simulation models for both inverters were developed in the software package POWERSIM 9.0.
Dual Z-Source inverter is considered. Simulation results of the aircraft variable-speed/ constant frequency power generation system with dual Z-source inverter are presented. The system is compared to that with the Pulse-Width Modulated (PWM) voltage source inverter.
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