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In this paper, a comparative analysis on three types of switched capacitor DC-DC converter, which are SCVM (Switched capacitor Voltage Multiplier) type, series-parallel type and Fibonacci type, is performed in same modeling way. The way is four terminal equivalent circuit model. In this model, it is possible to derive power efficiency and relation between input and output. In order to do the analysis,...
To improve battery cell balancing speed, a novel switched capacitor (SC) circuit combining the conventional SC circuit and the optimized SC circuit is proposed in this paper. It has the advantage that the balancing speed is independent of number increase as well as initial voltage variation of battery cells. The equivalent model of the proposed circuit is developed and analyzed in this paper. Compared...
In modern CMOS processes, several non-ideal influences affect the functionality of integrated circuits. In order to analyze and reduce these influences, time intensive circuit simulations are performed at transistor level. Although numerous non-idealities are considered in such simulations, they cannot be analyzed separately since they are inherent parts of the transistor models and cannot be faded...
A closed form solution is presented for the transient and steady-state response of surface permanent magnet synchronous machines to single FET short circuit failure in the drive. PWM techniques such as sine and discontinuous switching schemes are compared with respect to the motor performance under such fault condition. With the help of the analytic model the sensitivity of the key control parameters...
The influence of technological and circuit parameters variations on the combinational circuit elements delay increases with the transistor size reduction. Delay uncertainty comes from the parameter values dispersion; therefore, it is critical to analyze the possible delay variance. This paper presents the solution to problems of complex digital circuits performance analysis with the presence of the...
This paper describes the principles of operation and the physical model of an integrated AC-DC rectifier acting as a reverse-conducting transistor AC-DC rectifier with MOSFETs as fast-switches with a low ON-state voltage drop. An integrated AX-DC rectifier, when seen as a transistor AC-DC rectifier, can be used in many fields, e.g., for multi-functional automotive alternators, generator sets, welding...
It is suggested the concept of a switching function used for the linearization of the static converter circuit in the analysis of steady-state and transient, defuse to the formal decision of problems of synthesis. The article shows the possibility of presenting switching functions in the basis of binary operations of choice of implicative algebra for the identification of individual variables with...
DC-DC power converters based on switched capacitor circuits are widely used to realize different power supply domains in SOC chips. They can be classified as Analog Mixed Signal circuits. Current approaches to their verification is primarily based on simulating their transistor level netlist in circuit simulators. In this paper an approach to formally verify them using simulation traces is proposed,...
Multilevel inverters are best suitable for high power applications as they provide quality output waveform with less amount of voltage and current stresses on the switching elements which ensure good quality performance, among the various topologies of multilevel inverter cascaded H-Bridge is more reliable, simple in design and can be implemented easily and has better performance compared to other...
This paper deals with the susceptibility to radio frequency interference of smart power integrated circuits. A method to perform simulations aimed at evaluating the performance of subcircuits included in a more complex IC in the presence of EMI is presented. Referring to this, the behaviour of a current sensor included into a high-side power switch during DPI test is investigated. The results of simulation...
This paper explores the models of the energy-optimal voltage (VOPT) of near/sub-threshold digital VLSI circuits with a focus on the support for a wide range of nodal switching rates. The previous models can estimate the VOPT of the circuits having relatively high nodal switching rates (VOPT, H), but can become inaccurate in finding the VOPT of the circuits having low nodal switching rate. In this...
This paper presents a method of modelling a vacuum circuit breaker and surge protection in the Matlab package. The simulations were carried out in the capacity circuit with varistor surge protection.
We have studied a small size wind power generating system which uses the SRM as a SRG (Switched Reluctance Generator). In the previous study, we proposed a simple generator equivalent circuit model which can analyze SRG behavior at only circuit simulator by approximating the magnetic characteristics without coupled analysis of Finite Element Method (FEM) and circuit simulator. But, proposed model...
In this paper, we describe the simulation results of electromagnetic (EM) noise generated by fast switching circuits with gallium nitride (GaN)-based power devices. The frequency ranges of the EM noise extend to several hundred MHz because the GaN devices possess low parasitic capacitance. Therefore, we analyze both the conducted noise of the switching circuits and the radiated noise from the circuit...
A generic behavioral average-circuit model that analyzes hybrid converters that include a switched inductor and switched capacitors is developed. The model can be used to calculate or to simulate the average static, dynamic and small signal responses of hybrid converters. The model is valid for all operation modes of the Switched Capacitor Converters operating in CCM and DCM modes of the Switched...
DC-DC switching converter is an important part of power electronics, belonging to strong nonlinear time-varying systems. In the course of their traditional research, which rarely involves the study of nonlinear phenomena. However, During switching converter is working state, it can produce a transient pulse containing high frequency harmonics that can emit electromagnetic interference, electromagnetic...
In this paper, we present two methods for performing design verification of switching power converters. The first method can be used to compute the set of reachable states from an initial set of states with non-deterministic parameters. We demonstrate the method on a buck converter in an open-loop configuration. The method is automatic and uses the hybrid systems reachability analysis tool SpaceEx...
In this paper, we use the typical of basic ac modeling approach to establish Buck circuit in the continuous conduction mode (CCM), and obtain the open-loop control-to-output transfer function. Through analysis of the transfer function we design the corresponding compensation networks, which makes the main circuit designed have a good steady state and dynamic performance. On the basis of the theoretical...
In this paper, simple modeling of the DC-DC converter is presented, which is based on the current in the switch and the voltage on the switch, together with some other variables. Two types of DC-DC converters are used herein to verify the proposed modeling method.
The vacuum circuit breakers are used to switch shunt capacitors which are used as a reactive compensator. Due to capacitors' energy storage characteristic and asynchronous closing of vacuum circuit breakers, system will produce high overvoltage during switching off the shunt capacitors especially when a beaker is restriked. It's harmful to the insulation and lifecircle of the equipments and even threatens...
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