By Topic

# IET Power Electronics

## Filter Results

Displaying Results 1 - 16 of 16
• ### A three-phase unity power factor front-end rectifier for AC motor drive

Publication Year: 2012, Page(s):1 - 10
Cited by:  Papers (7)
| | PDF (1152 KB)

This study presents the bidirectional controlled switch-based high-frequency (HF) current injection circuit with simple gate control scheme. Improved power factor and total harmonic distortion (THD) of ac input line current of front-end rectifier for ac motor drive is achieved using this scheme. The gating pulses for feedback bidirectional controlled switches are generated at every zero-crossing i... View full abstract»

• ### Analysis and implementation of a novel single-switch high step-up DC-DC converter

Publication Year: 2012, Page(s):11 - 21
Cited by:  Papers (12)
| | PDF (1012 KB)

A novel high step-up DC-DC converter, which is composed of one boost converter, two capacitors, two diodes and one coupled inductor, is presented in this study. The concept is that the two capacitors are charged in parallel and are discharged in series via the coupled inductor to achieve high step-up voltage gain under appropriate duty ratio. Also, the leakage-inductor energy of the coupled induct... View full abstract»

• ### Solution trajectories for selective harmonic elimination pulse-width modulation for seven-level waveforms: analysis and implementation

Publication Year: 2012, Page(s):22 - 30
Cited by:  Papers (15)
| | PDF (1590 KB)

A detailed analysis of a seven-level selective harmonic elimination pulse-width modulation method suitable for multilevel DC-AC converters is presented in this study. Solution trajectories that cover the normal range of modulation indices typical for the operation of multilevel inverters are documented. The properties and characteristics of these solutions with regard to the distribution of switch... View full abstract»

• ### Constrained model predictive control strategy for single-phase switch-mode rectifiers

Publication Year: 2012, Page(s):31 - 40
Cited by:  Papers (10)
| | PDF (1179 KB)

This study presents a new approach to the control problem of single-phase switch-mode rectifiers. The proposed approach is based on a particular model predictive control scheme, incorporated with soft constraints for the errors of the key control targets. This control system is free of portional integral (PI) controllers, which are responsible for poor dynamic performance. Control objectives of si... View full abstract»

• ### Virtual prototyping and pre-sizing methodology for buck DC-DC converters using genetic algorithms

Publication Year: 2012, Page(s):41 - 52
Cited by:  Papers (7)
| | PDF (1035 KB)

In this article, the authors study the pre-sizing approach of DC-DC buck converters useful for electronics and system designers. The pre-sizing step in an industrial process is suitable to obtain a preliminary precise sizing of a sub-system (here a buck DC-DC converter): it permits the system designer to perform a feasibility analysis of an overall system (e.g. that contains a buck DC-DC converter... View full abstract»

• ### Current injection-based DC-link capacitance estimation using support vector regression

Publication Year: 2012, Page(s):53 - 58
Cited by:  Papers (1)
| | PDF (412 KB)

A novel online capacitance estimation method for a DC-link capacitor in a three-phase back-to-back pulse width modulation (PWM) converter is proposed. A controlled AC current with a frequency lower than the line frequency is injected into the input side, which then causes AC voltage ripples at the DC output side. With this AC voltage component extracted by band-pass filters, the capacitance is est... View full abstract»

• ### Dimmable driver for light-emitting diode with total harmonic distortion improved

Publication Year: 2012, Page(s):59 - 67
Cited by:  Papers (2)
| | PDF (821 KB)

A novel dimmable light-emitting diode (LED) driver is presented. Via a simple concept, the total harmonic distortion and the power factor of the proposed LED driver are significantly improved as compared to the traditional LED drivers. Above all, there are no capacitor and no inductor in the main power stage of the proposed LED driver, thereby causing the life of the LED driver to be enhanced and ... View full abstract»

• ### Development of non-linear controllers for a tri-state boost converter

Publication Year: 2012, Page(s):68 - 73
Cited by:  Papers (1)
| | PDF (399 KB)

The development of non-linear controllers for a tri-state boost converter in the presence of an unknown load is addressed. In contrast to the conventional boost converter, the tri-state boost converter has two control inputs and does not have a right-half-plane zero. The controllers are designed using the average model of the tri-state boost converter to vary both the boost and `capacitor-chargi... View full abstract»

• ### Analysis of an asymmetric modulation method for cascaded multilevel inverters

Publication Year: 2012, Page(s):74 - 85
Cited by:  Papers (12)
| | PDF (1128 KB)

Traditional means for implementing the switching of the power switches in multilevel converters is subharmonic pulse width modulation (SHPWM) or triangulation approach involving a comparison between a target reference waveform and several high-frequency carrier waveforms where all the power switches usually work at high switching frequency. The asymmetric modulation method (AMM) which is derived f... View full abstract»

• ### Voltage allocation control for multi-module power conversion system with parallel-input and series-output connection

Publication Year: 2012, Page(s):86 - 94
Cited by:  Papers (1)
| | PDF (871 KB)

Voltage allocation (VA) is analysed for a multi-module power conversion system using a parallel-input and series-output (PISO) connection with different power ratings. In PISO system, the multi-module converters with different power ratings cannot regulate total output voltage when one of the series module is operated in its voltage limited mode. Therefore an automatic master loop regulation (AMLR... View full abstract»

• ### Control technique for non-linear and unbalance compensation of an integrated magnetics-based three-phase series-shunt-compensated uninterruptible power supply

Publication Year: 2012, Page(s):95 - 105
Cited by:  Papers (2)
| | PDF (1011 KB)

Handling unbalanced and non-linear loads in a three-phase AC power supply has always been a difficult issue. This has been addressed in the literature by either using fast controllers in the fundamental rotating reference frame or using separate controllers in reference frames specific to the harmonics. In the former case, the controller needs to be fast and in the latter case, besides the need fo... View full abstract»

• ### Minimisation of total harmonic distortion in a cascaded multilevel inverter by regulating voltages of dc sources

Publication Year: 2012, Page(s):106 - 114
Cited by:  Papers (16)
| | PDF (878 KB)

Recently, a switching strategy based on minimisation of total harmonic distortion (MTHD) has been proposed. Normally, in multilevel flexible AC transmission systems, DC voltages of capacitors are changed. It is proposed to regulate this value on a predefined value. Thus, desired value is employed for optimising THD value. Results show effectiveness of the proposed method in minimising THD, when it... View full abstract»

• ### High-efficiency bidirectional DC-DC converter with coupled inductor

Publication Year: 2012, Page(s):115 - 123
Cited by:  Papers (19)
| | PDF (1025 KB)

This study presents a novel soft-switching bidirectional dc-dc converter with a coupled inductor. Transformer-based circuit topologies are commonly employed in conventional bidirectional converters and soft-switching techniques, including zero-voltage switching (ZVS) or zero-current switching (ZCS), are frequently applied to mitigate switching losses. Unfortunately, the use of more than four switc... View full abstract»

• ### Low-inductance axial flux BLDC motor drive for more electric aircraft

Publication Year: 2012, Page(s):124 - 133
Cited by:  Papers (12)
| | PDF (1183 KB)

As aircraft technology is moving towards more electric architecture, use of electric motors in aircraft is increasing. Axial flux BLDC motors (brushless DC motors) are becoming popular in aero application because of their ability to meet the demand of light weight, high power density, high efficiency and high reliability. Axial flux BLDC motors, in general, and ironless axial flux BLDC motors, in ... View full abstract»

• ### Variable turn pitch coils design for heating performance enhancement of commercial induction cooker

Publication Year: 2012, Page(s):134 - 141
Cited by:  Papers (10)
| | PDF (730 KB)

This study aims to enhance heating performance of an induction cooker with convex bottom Chinese wok for commercial applications. Traditional single coil solution is first designed according to the wok shape. The theoretical closed-form expressions of the eddy currents in the wok are derived, and further verified by finite-element method (FEM) analysis. The results reveal the localised and uneven ... View full abstract»

• ### Series hybrid active power filter based on controllable harmonic impedance

Publication Year: 2012, Page(s):142 - 148
Cited by:  Papers (25)
| | PDF (779 KB)

In order to reduce inverter capacity and enhance system reliability, a novel series hybrid active power filter (APF) based on controllable harmonic impedance is proposed in this study. As the pulse-width-modulated inverter works as a controlled harmonic current source, the series transformer (ST) can exhibit the controllable impedance to harmonic current, which makes the impedance of primary windi... View full abstract»

## Aims & Scope

IET Power Electronics brings together five principal power electronics themes including: applications of power semiconductor technology; circuits; devices; techniques; and performance management.

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