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In this paper, a single stage power factor corrected (PFC) fourth-order dc-dc buck converter, having inductor at the source side, is proposed as a driver for LED lighting application. Converter is designed in accordance with IEC 61000-3-2 standards. Discrete time model of the converter is developed and is used for controller design; validate the stability and time-domain performance. A three-loop...
A quasi single-stage power factor correction converter, which is composed of a three-level (TL) Boost converter and a DC-DC transformer (DCX), is presented and analyzed in this paper. The DC output load is connected to one of the dividing capacitors of the TL Boost converter, so that the load voltage can be lower than the peak amplitude of the AC line voltage and part of the AC input power can be...
A novel on-board battery charger for electric vehicle (EV) application based on open-winding permanent magnet synchronous machine is presented in this paper. The innovative charger reutilizes the currently existing components of EV drivetrain system, which has the net effect of saving cost, volume and weight. The topology integrates the conventional common dc-link converter with the windings of the...
This paper realizes a high power factor, high reliability, and low cost PMSM drive system with small DC-link capacitor. Compared with conventional bulky electrolytic capacitor for the regulation of DC-link voltage, a small-size film capacitor with capacitance reduction to 1% is used to realize a seneorless PMSM drive with high power factor, high reliability, and high compactness. To overcome high...
AC-DC single-stage converters are widely used in industrial applications because they are cheaper than conventional two-stage converters. In this paper, state of the art low power single-stage converters are reviewed. These converters are classified into several types in the paper, the operation of an example converter of each type is discussed, and the advantages and drawbacks of each type are stated...
A simple on-line auto-tuning technique for a resonant converter to achieve output voltage regulation while tuning the switching frequency to the resonant frequency is proposed in this paper. The proposed method can deal with resonant frequency variation caused by the resonant components tolerance and variation. The proposed technique is developed by detecting the zero-crossing point and peak point...
This paper proposes an application of adaptive dual current mode control (ADCMC) on bidirectional bridgeless power factor correction (BBPFC) boost rectifier with unipolar switching. The given simulation results confirm the benefits of the proposed control strategy of the BBPFC converter, primarily regarding the maintaining of the sine waveform of the average inductor current.
The paper proposes an electronic-smoothing inductor (ESI) as an energy storage element in current-source PFC based LED drivers. In comparison with the passive inductor approach, the required inductance value of the overall driver circuit can be significantly reduced such that better power density and efficiency can be achieved. The derivation of different structures of current-source LED drivers by...
This paper introduces a new power factor correction scheme for a flyback converter with primary regulation technique, to ideally eliminate the distortion of the ac input current (practically a Total Harmonic Distortion (THD) lower than 5%). The effectiveness of the new control scheme is proved in a 35W driver with universal input range (90VAC∼277VAC). Application target is Solid State Lighting (LED...
A three-channel interleaved Power Factor Correction (PFC) based on a new digital controller STNRGPF01 [7] operating in Continuous Conduction Mode (CCM) is presented in this paper. The control structure is based on a mixed signal concept where the time critical functions such as input current control and fast over current protections are performed using analog parts. All the non-time critical functions,...
This paper presents a harmonic compensation method, which can be used to significantly reduce lower-order harmonics in the grid-side current of single phase power factor correction (PFC) circuits. Often there are limitations on the percentage of lower-order harmonics in the grid currents to maintain conducted EMI standard, which may be violated, especially during light load conditions. The proposed...
This paper presents a new power supply consisting of an inverter and a power factor correcting stage with an integrated active energy storage for servo drives. The energy storage is realized with a capacitor and a DC-DC-converter. This enables the power supply to reuse the braking energy of servo drives instead of losing it in a braking chopper resistor. The main advantage is the simple integration...
According to the requirement of the power factor and the dynamic performance of the asynchronous machine tool field, an asynchronous motor inverter with active power factor correction is proposed. The proposed inverter is a 3kW asynchronous motor drive control platform. At first, the proposed single phase converter with APFC is realized by using the MATLAB/SIMULINK. Then, the boost APFC is designed...
This paper focuses on the problem of controlling a single-phase grid connected to the photovoltaic system with L filter. In this system the DC/AC converter is constituted by two stages: a boost power converter and a single phase inverter. The main control objective is threefold: (i) extracting maximum possible power from photovoltaic module MPPT (ii) tight regulation of the DC link voltage (iii) the...
This paper presents a method to obtain low input current distortion at higher voltage loop bandwidth. A simple RC low pass filter is used in high bandwidth voltage loop to attenuate dominant second order ripples from the control voltage to obtain low input current distortion. This method reduces the complexity in hardware involved in filter implementation. The proposed work keeps the harmonic distortion...
Power factor and harmonics are primary factors in electrical distribution network. Harmonics are generated by the non-linear and irregular loads at end users. High harmonics in devices draws the large amount of current which results in poor power factor. Hysteresis control technique is one of the techniques in power factor converter topologies. Switching losses, low power factor and high harmonic...
This paper proposes a mixed dq-control scheme for a sensorless PMSM drive to improve input power factor with an electrolytic capacitor-less bridge rectifier. Instead of using bulky traditional electrolytic capacitor, a very small film capacitor is adopted to achieve high input power factor with improved power density and reliability. However, due to large dc-link voltage fluctuations, deterioration...
A novel observer-based feedforward compensation method is proposed to improve the output voltage regulation of a boost power-factor-correction (PFC) rectifier. A feedback observer estimates the load current for use in the feedforward correction of the inductor current. The feedback gain of the observer is intimately related to the regulation error of the output voltage. Given required performance,...
This paper introduces an interleaved Boost Power Factor Correction (PFC) converter using the digital controller. Current Sample Correction (SC), Duty Ratio FeedForward (DFF) and Adaptive PID Compensator methods are employed to improve the overall performance of circuit. A 3-kW prototype has been built to verify the feasibility of proposed digital controller
Based on the fact that both the phase and amplitude characteristics of fractional capacitor are related to its order, the introduction of fractional capacitor will make power factor correction (PFC) more flexible compared with the one using conventional capacitor. In order to verify the PFC function with fractional capacitor, an equivalent fractional capacitor model composed of an inverter and a resistor...
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