<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> Domestic induction cookers operation is based on a resonant inverter which supplies medium-frequency currents (20–100 kHz) to an inductor, heats up the pan. The variable load that inherent this application requires use of reliable and load-adaptive control algorithm. In addition, wide output power range required get satisfactory user performance. paper, algorithm cover variety loads proposed....

This paper presents and analyzes the asymmetrical voltage-cancellation (AVC) control, a generalized control technique for resonant inverters. It is applied to popular full-bridge series inverter. The proposed achieves better efficiency performances than conventional fixed-frequency strategies, while considering zero-voltage-switching operation, output power load variations. theoretical results are verified experimentally, using prototype an induction-heating cooking appliance.

In this paper several research topics pertaining to the design and modeling of domestic induction appliances are reviewed. Each topic is summarized, stressing its most significant advances pointing future tendencies. A bibliographic review showing some published papers during last years included. The emphases relative contributions them also discussed.

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> The efficiency of zero voltage switching half-bridge series resonant inverter can be decreased under certain load conditions due to the high frequencies required. proposed variable frequency duty cycle (VFDC) control is intended improve in medium and low output power levels because frequencies. study performed this letter includes, a first step, theoretical analysis balance as function...

In this paper, the frequency-dependent resistance in Litz-wire planar windings for domestic induction heating appliances is analyzed. For these inductors, which size not an essential constraint, analytical model developed based on superposition of different loss effects wire. Eddy current losses, including conduction losses and proximity-effect both internal external, were considered modeled. The magnetic field necessary to evaluate external proximity as well analytically calculated...

Mutual inductance is a key parameter of the inductively coupled circuits such as transformers and contactless energy transfer systems. This particularly required to design power electronics associated with each application. However, its value usually extracted from measurements performed in previously built prototype, which an expensive time-consuming task. In this paper, analysis mutual between two planar circular windings developed. The takes into account effect media that can be part...

Efficient energy management in residential areas is a key issue modern systems. In this scenario, induction heating (IH) becomes an alternative to classical technologies because of its advantages such as efficiency, quickness, safety, and accurate power control. article, the design flexible cooking surfaces featuring IH technology presented. The main technical challenges are given, inductor system electronic converter detailed. feasibility proposed verified through laboratory prototype.

Multiple-load and multiple-source systems are widely present in the current technology. These require controlling either supplied voltage or power to several loads with different requirements simultaneously. As a consequence, cost size of stage may increase beyond admissible limits for certain applications. Considering multiple-inductor loads, novel series-resonant multiinverter topology is proposed obtain cost-effective high-power density solution. The converter based on common inverter...

This paper presents the use of frequency modulation as a spread spectrum technique to reduce conducted electromagnetic interference (EMI) in A band (9-150 kHz) caused by resonant inverters used induction heating home appliances. For sinusoidal, triangular, and sawtooth profiles, influence peak period deviation EMI reduction power delivered load is analyzed. digital circuit that generates best analyzed profiles implemented field programmable gate array. The design modeled very-high-speed...

Optimization of the efficiency an induction heating application is essential in order to improve both reliability and performance. For this purpose, multistranded cables with litz structure are often used applications. This paper presents analysis optimization systems focusing on optimal copper volume winding respect different constraints. The based concept a one-strand one-turn coil, which captures dissipative effects system reduces number variables analysis. An expression for derived. It...

In this paper, an induction heating system composed of two partly coupled coils connected to a double half-bridge resonant inverter is deeply analyzed. Induction are electrically characterized by their electrical equivalents, usually series RL circuit, where the inductance determined magnetic energy stored in and resistance associated with power dissipated load, generally, metallic workpiece. The aim work obtain equivalent inductor concentric used domestic cookers means computational...

Operation under light-load conditions is a general issue when developing power converters as it can lead to system instability and/or decreased performance. This topic particularly important for resonant their efficiency significantly reduces operation point set outside conditions. Considering the importance of converter reliability, environmental impacts, and regulation concerns, major effort improve justified. Domestic induction heating an application where variable loads output...

Efficiency of electromagnetic energy transference in coupled pot-inductor systems induction cooktops is analyzed. The influence different parameters such as pot properties, number turns the windings, frequency currents, cable types, and ferrite arrangements studied by means an analytical model. proposed model a combination two independent models corresponding to loaded planar coil impedance losses, respectively. are related using global magnetic field system. analysis reveals that it not...

Most of the ac–ac converters used in home appliances are based on single-output dc-link inverters, which provide a cost-effective and straightforward solution. However, two-stage power conversion decreases density efficiency. A direct has been thoroughly studied past. Nevertheless, complex control scheme higher cost have prevented it from being cost-oriented applications, such as appliances. This paper proposes by means multiple-output resonant matrix converter applied to multiple inductive...

In this paper, a comparison is performed between four inverter topologies commonly used in induction cookers. The considered are the full-bridge inverter, half-bridge and two single-switch inverters. All of them designed for same specifications they compared aspects such as power device stresses, efficiency, frequency control electromagnetic emissions.

We present a simple method to calculate the winding resistance of litz-wire inductor in an induction cooking appliance, taking into account eddy-current losses, including conduction losses and proximity-effect losses. The method, which uses numerical calculation magnetic field, can be used determine optimum number strands litz wire. effects temperature on total are included calculation. have built prototype verify its limitations. consider accuracy limits method.

In this paper several research topics pertaining to the design and modeling of domestic induction appliances are reviewed. Each topic is summarized, stressing its most significant advances pointing future tendencies. A bibliographic review showing some published papers during last years included. The emphases relative contributions them also discussed.

Usually domestic induction appliances heat ferromagnetic pans. This technology is well known and it successfully applied by many manufacturers. However, there are a number of non-ferromagnetic pans (made aluminium, copper, copper-nickel or stainless steel) that cannot be properly heated this technology. study presents modified half-bridge series resonant inverter topology can used to means selective harmonic operation technique. The proposed has two topological configurations with modes: the...

In this letter, a method to calculate the ac losses, including skin effect and proximity in planar windings with rectangular cross-sectional conductors is proposed. The aim proposing proper losses expressions similar formulas available for round wires, be used calculation of optimization magnetic implemented printed circuit board. proposed model based on decomposition into conduction losses. Conduction only depend properties conductor, whereas are calculated by using orthogonal fields which...

Printed circuit board (PCB) windings are convenient for many applications given their ease of manufacture, high repeatability, and low profile. In cases, the use multistranded litz wires is appropriate due to rated power, frequency range, efficiency constraints. This paper proposes a manufacturing technique semianalytical loss model PCB using planar structure obtain similar ac reduction that conventional round with structure. Different coil prototypes have been tested in several...

A set of analytical expressions is derived for the equivalent impedance in a planar circular induction heating system, used example home appliances. The system consists an n-turn winding loaded by conductive material. Expressions that describe frequency dependence are provided. influence load conductivity, permeability, and geometrical dimensions also considered. Validation proposed model carried out through experimental measurements.

We present an analytical model of the equivalent impedance n-turn planar winding sandwiched between top and bottom multilayer media. Although model's general compact notation is valid for all systems involving magnetic dipoles stratified media, perhaps its main application domestic induction heating systems. The proposed based on vector potential solution a single-turn coil located two this result extended to coils. demonstrate applicability by variety examples. experimental results justify...

This paper presents a field-programmable gate array (FPGA) implementation of digital circuit that measures in real time the output power medium-frequency (25-50 kHz) induction-heated cooking appliances. The voltage and current are sensed using first-order sigma-delta (SigmaDelta) analog-to-digital converters. power-measuring algorithm is very simple while maintaining good accuracy. developed hardware description language (VHDL). circuit, converter, signal conditioning circuits, SigmaDelta...

Adaptable-diameter inductors are being implemented in domestic induction hobs order to increase the range of suitable pot diameters and achieve better use rated power electronics. Such arranged by means several concentric planar windings, usually up three units, each one them comprising litz-wire turns. Currently, resonant inverter is dedicated supplying winding. In this paper, a characterization these terms their impedance matrix derived. The self-impedance winding those caused coupling...

E-ciency often constitutes the main goal in design of a power system because minimization losses magnetic components implies better and safer working conditions. The primary source component is usually associated with current driven by wire, which ranges from low to medium frequencies. New tendencies involve increasing frequencies order reduce size devices, thus reducing costs. However, optimal procedures increasingly complex solutions for improving performance. For instance, using litz-type...