Showing 3 results for Power Supply
A. Dastfan, F. Behrangi,
Volume 5, Issue 1 (3-2009)
Abstract
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 proposed. In the proposed circuit,
three switches convert the low frequency AC input to a DC link. A single-phase bridge
inverter converts the DC-link to a high frequency AC output. The output of the matrix
converter is then processed via a high frequency isolation transformer and rectified to the
regulated DC voltage. In the proposed topology only a simple voltage control loop ensures
that the output voltage is regulated against load changes as well as input supply variations
and the current control loop is not used to correct the input currents. Theory analysis and
simulation are made to investigate performance of the proposed circuit. Simulation results
show that in the proposed power supply with 7-switch, the input currents are of a high
quality under varying load conditions and input voltage.
A. Rajabi, H. Lexian,
Volume 17, Issue 1 (3-2021)
Abstract
One of the important requirements in projectiles is to design a power supply for fuse consumption. In this study, an optimum design for the power supply, which includes a Miniaturized Inertia Generator (MIG), was introduced. The main objective of this research was to optimize the dimensions of the MIG with the aim of increasing energy. To achieve this, the design of experiment (DOE) was carried out through RSM-BBD to optimize six parts of the MIG. Numerical simulations were performed using Maxwell’s software. After analyzing of results by ANOVA and extracting the optimum result from the RSM, a Miniaturized Inertia Generator was fabricated with optimum dimensions. The results showed that the MIG with optimum dimensions at an acceleration of 800’g could generate 15.25V and stores the generated energy using an RLC circuit within 1ms. The experimental results which were obtained by the shock test system showed that 14.75V was charged on a capacitor within 1.1ms which has good conformity with the numerical results. The results indicated that the proposed design not only increased the MIG efficiency, but also determined the effect of each parameter on the produced energy and efficiency.
E. Y. Burkin, F. A. Gubarev, V. V. Sviridov, D. V. Shiyanov,
Volume 19, Issue 3 (9-2023)
Abstract
A two-channel pulsed power supply for an imaging system with brightness amplification and independent synchronous laser illumination is designed. The power supply generates synchronized high-voltage pulses with a frequency of 16–24 kHz, an average electrical power of up to 1.2 kW, and an adjustable amplitude of up to 6.2 kV to pump copper bromide gas discharge tubes with independent control of the temperature parameters of the active medium. To generate pumping pulses for laser media, we used a two-channel thyratron circuit with a common source of stabilized voltage provided by a step-down pulse stabilizer and a bridge inverter-based circuit for the pulsed charge of storage capacitors. The voltage equalization on the storage capacitors is carried out by means of magnetic coupling of the charging inductances wound on a common core. Adjustable delay lines based on variable inductances provide synchronous operation of two brightness amplifiers with a synchronization accuracy of lasing pulses of ±1 ns. The power supply demonstrated stable operation with two gas discharge tubes having different characteristics, including those with different types of electrodes. It has been integrated into a laboratory facility for the study of high-energy materials combustion.
