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Single-phase inverters suffer from double-frequency ripple of the input power. For mitigation, an input capacitor is applied but the fluctuation range of power across it is limited according the desired fluctuation in the dc-link voltage. To realize power decoupling without changes in the main circuit and in the control strategy of it, an additional independent power decoupling circuit can be applied,...
In this paper the control synthesis of asynchronous electric drive was considered. The proposed control algorithm provides a state change of the asynchronous machine with squirrel-cage rotor without magnetization in the minimum time within the limits set, at simultaneous regulation of a reactive power.
In this study a family of Nine-Switch Converters is observed. In proposed circuits intermediate DC-link elements interface input and output converter parts through a nine-switch matrix chain. Such approach allows achieving step-up voltage capability with low THD index. The article gives general information about principle of operation and possible control strategies, considers basic performances and...
The paper reviews research data of hybrid system of reactive power compensation for Metro electric power substations. Comparative compensation analysis has been made and control system for suggested device has been developed, besides mathematic simulation has been carried out as a result of which power factor of substation has been increased from 0.5 to 0.97–0.99.
The report is dedicated to the closed-loop design for a phase locking and a magnitude balancing of the three-phase inverter voltages to the three-phase grid voltages when the AC motor stator windings are switched to the AC power supply from the power frequency converter and backwards. The proposed control strategy for the AC drive with IGBT-inverter allows to decrease an inductance of current-balancing...
Transformerless AC voltage regulator with per phase switches which capable to increase of voltage without loss of system current quality is considered. Such a converter can be used as a voltage stabilizer or device for the quality of electricity improving. The results of mathematical modeling and analytical calculation of the rms values by the first currents and voltages harmonics are presented.
5 V and 12 V embedded low drop output (LDO) units are designed as parts of Multi-Functional Power Converter Control Integrated Circuits (MFPCC IC) and fabricated using 250 nm 40 V BCD (Bipolar, CMOS, DMOS) technology. Measured LDO parameters are in agreement with designed parameters in the temperature operation range −40…+85°C. It has been shown that developed LDO units operate properly in a wide...
The application of a physical model of the transmission line for the study of controlled series compensation devices is considered. The description of the developed physical model is submitted, specifications and the methodology of its use in research and debugging series compensation devices are examined. As the example the article describes physical line model application for evaluation and debugging...
Modeling results of electrodrive designed with the use of autonomous voltage inverter (AVI) informative properties are presented. A principal possibility of alternate current machine rotation speed regulation by keeping inflection point position stability on switching interval of inverter phase current is shown.
The paper describes schemes to stabilize of the output voltage of the high-voltage power supplies for the powerful traveling wave tubes. It is shown that the considered schemes provide the reliable power supply of the delay system of the traveling wave tube in complementary sets of load conditions and conditions of changing parameters of the mains. However, none of these schemes provides the reliable...
This paper considers scheme of primary AC power supply system for autonomous objects. As well this paper presents the characteristic features of power supply system, its structural model and the simulation results are given.
Cascade control system design for a Cuk converter with pulse-width modulator in control loop is discussed. Proposed control system consists of two cascades. Inner one maintains input current by PI controller with an additional low-pass filtering. In outer one the third-order controller provides output voltage regulation. Analytical expressions are derived for digital implementation of the proposed...
The article considers multichannel integrated circuits (ICs) MH2XA010-02/03, which are realized on the radiation-hardened structured array (SA) MH2XA010 and designed for analog signal processing of optoelectronic sensors. It gives the electric circuits of ICs, the description of their functionality features and the measurement results of their main parameters.
In this paper dynamic properties of resonant converter with ZCS (Zero Current Switching) were proposed. Closed-loop control system and “control action — output voltage” transfer function was obtained.
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