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It presents a cascaded boost dc-to-dc converter employing a tapped-inductor to obtain a high voltage boosting ratio. It consists of two voltage boosting stages. Stage-I configures like boost converter, and Stage-II is designed by using a tapped-inductor. Both stages have a cascaded connection to maximize a voltage boosting ratio between input and output voltage. After theoretical analysis, computer-aided...
In this paper, an overall comparison between the Quadratic Boost Converter (QBC) & Cascaded Converter or Cascaded Boost Converter (CBC) is given in terms of ideal condition, as well as with the consideration of Equivalent Series Resistance (ESR) of inductor-capacitor. The differences in the voltage gain due to the individual effect of inductive and capacitive ESR is shown in this paper. The parameters...
A novel adaptive off-time (AOT) technique, which is applicable to the circuit design of an AC-DC constant-current LED driver using hysteresis-current control method, is proposed in this paper. The AOT is achieved by a novel off-time control method, which is based on the combination of peak-current-loop and error sample feedback-loop, to solve the problem that peak current is not consistent with average...
A lower power consumption, smaller output ripple and better regulation current-mode CMOS buck power converter with a novel on-chip slope compensation circuits for feedback control is presented in this paper. In current-mode converters, the slope compensation circuits needs to add ramp voltage signal with the inductor current signal in order to avoid subharmonic oscillation. The converter is designed...
This paper proposes a partial power assistance operation to encourage the feasibility of a single-phase diode rectifier-fed motor drive system equipping DC-link shunt compensator (DSC). DSC which is located to DC-link in parallel allows to remove electrolytic capacitor and grid filter inductor from the system by performing grid current shaping and motor output power supporting controls. The capability...
In this paper, the current sensorless control for dual-boost half-bridge (DBHB) converter with power factor correction (PFC) function is presented. The short-through problem can be avoided by the dual-boost structure for enhancing the reliability. It also reduces the power dissipation due to the body diodes' reverse recovery current of switches. Furthermore, the intrinsic voltage-doubler characteristic...
In this paper, a four-port DC-DC converter is proposed for applications in a grid-connected integrated solar PV and energy storage system. The four ports of the converter are one input source, one bidirectional port, and two output ports. The bidirectional port can be used to integrate the energy storage system to the solar PV generation system, while the two outputs provide the flexibility to supply...
In power electronic converters working with PWM discontinuous control loops is very often used. This paper analyses the implementation of a valley current mode (VCM) control in a bi-directional hybrid DC-DC converter (HBDC) used in renewable energy applications. Analytical descriptions, digital simulation and experimental results performed on a laboratory prototype are presented in order to prove...
Aiming at the problem of short-circuit protection, a novel bridge-type topology of fault current limiting (FCL) is established based on resonant characteristics. It is equivalent to a piece of wire during the normal operating state. When short-circuit fault occurs, the dc limiting reactor inserts automatically and rapidly under the joint action of the capacitor, limiting the increasing speed and amplitude...
This paper presents the full zero voltage switching three-level boost dc-dc converter. The boundary conduction mode and snubber capacitors provide zero voltage switching operation in the whole range of operation. Analytical estimation and simulation results have proved the proposed idea. In advance, it was demonstrated that the multi-cell structure along with an interleaved control technique provide...
This paper discuss as the dynamics of a SMPS can be investigated by recurrent neural network (RNN) based models with an Hamiltonian formulation and function used for the training, so leading to a novel paradigm that we call RNNHT model. By using the calculated state variables in a boost converter a RNN is trained by considering also the minimization of the energy stored according to a defined cost...
Smooth mode transfer of voltage source inverter (VSI) between grid-connected and stand-alone modes is achieved by operating the inverter in voltage control mode (VCM). However, this operation produces some adverse practical issues such as requirement of large rating VSI, limited real power injection by VSI, negligible operational capability in strong grid, frequent mode transfer, and reactive power...
This paper proposes a control method of DC-link shunt compensator (DSC) located to DC-node in three-phase diode rectifier system. The circuit can substitute for bulky components such as DC reactor filter and DC-link capacitor from conventional three-phase system. Hence the system can be miniaturized and becomes lighter by reducing heavy passive components. DSC supplies harmonic current into diode...
In this paper a multisource renewable energy system for high-current applications is proposed. The power architecture is based on a multi-input power converter including control and reconfiguration subsystems. Independently of the type of connected renewable sources, a proper control of the output DC voltage bus is provided as well as a proper control on the operating point of each renewable source...
Normally, a two stage power conversion system is used to convert a low dc voltage to high amplitude ac voltage. These two stage power conversion systems are very bulky, more complex in control and less efficient, etc when they are used, especially for low input dc voltages. In this paper a high gain dc-ac inverter topology is presented, which can produce an instantaneous output voltage higher or lower...
Solar photovoltaic (PV) emulator systems with high precision and high reliability are of great importance in the interest of developing PV equipment with improved performance at fluctuating conditions. Typical PV module emulators tend to have some drawbacks (high cost, limited customization abilities), with some not capable of providing the power outputs of the newest generation of PV modules. A portable,...
There is renewed interest in the use of non-Foster circuit elements in a variety of important applications such as wideband impedance matching and artificial magnetic conductors. Although non-Foster devices such as negative capacitors and negative inductors can be realized using current conveyors and Linvill circuits, a digital design approach may offer an important alternative in some applications...
Superconducting controlled reactor (SCR), as a novel dynamic reactive compensation facility, has many advantages such as free harmonic, fast response, low losses and high voltage withstand [1]. However, due to SCR special structure and magnetic circuit, capacity gears of SCR designed by traditional methods are not accurate enough.
A systematic analysis of 3-level integrated buck converters is conducted in this paper. Detailed derivations of the working principles, voltage conversion ratio and output voltage ripple are given. In particular, the system loop gain of 3-level buck converters is analyzed, which provides guidance on designing fast and robust 3-level converters. The derived loop gain is verified with time-domain small...
Among the on-chip current sensing techniques, inductor current sensing method is the most feasible one for high switching frequency converter, which aids reduction of the filter inductor size. This paper presents a reduction of area design for the combined AC and DC inductor current sensor with load transient enhancement for the systems-on-chip applications. The proposed current sensor is simulated...
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