Induction Heating Systems and Applications

Induction heating harnesses electromagnetic induction to generate heat within conductive materials, offering rapid, controllable and highly efficient thermal processes. Central to these systems are power‐electronic converters—often half‐bridge or full‐bridge topologies coupled to series or LLC resonant tanks—that drive high‐frequency alternating currents through induction coils. When a workpiece is placed within the coil’s alternating magnetic field, eddy currents form and heat the material volumetrically, avoiding direct contact and ensuring precise temperature control. Applications span domestic cooking and all‐metal cooktops, industrial hardening and melting, railway de‐icing, medical sterilisation and additive manufacturing. Recent advances emphasise integration of wide‐bandgap semiconductors to boost switching frequency and minimise losses, development of adaptive control schemes for load estimation and position detection, and multiphysics modelling to optimise electromagnetic and thermal performance. The technology’s global significance lies in its energy efficiency, reduced emissions, enhanced safety and capacity for integration into smart manufacturing and consumer appliances.

Research from Nature Portfolio

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Research from all publishers

In 2023, comparative analysis of LLC resonant inverters demonstrated optimal design rules for component sizing and phase‐shift modulation, achieving efficiencies up to 98.5 per cent in a 25 kW induction hardening system operating at 500 kHz. Another 2023 study evaluated silicon versus SiC devices in a series‐resonant half‐bridge inverter across 200 W–1.8 kW and 45 kHz–125 kHz, showing that wide-bandgap semiconductors permit higher switching frequencies and elevate peak system efficiency to 99 per cent. A 2022 investigation introduced an online load‐estimation method using series RLC resonant converter current signatures to identify cookware material and position within 10 ms, enabling real-time power adjustment for safe and efficient domestic induction cookers.

Induction Heating Systems and Applications publication trend

The graph below shows the total number of articles in induction heating systems and applications across all publications each year (not limited to Nature Index journals).

Technical terms

Induction heating: A method of heating conductive materials by inducing eddy currents through a high‐frequency magnetic field.

Resonant inverter: A converter topology that generates high‐frequency alternating current by exploiting resonance between inductance and capacitance to achieve soft switching.

Wide‐bandgap semiconductors: Power electronic devices, such as SiC or GaN, that offer higher breakdown voltages, faster switching speeds and reduced losses compared to silicon components.

Soft switching: A technique in power conversion where voltage or current transitions occur under zero‐voltage or zero‐current conditions to minimise switching losses.

Eddy currents: Circulating currents induced within conductors exposed to changing magnetic fields, responsible for generating heat in induction heating processes.

References

1. Induction Heating in Domestic Cooking and Industrial Melting Applications: A Systematic Review on Modelling, Converter Topologies and Control Schemes. Energies (2021).
2. Comparative analysis and improved design of LLC inverters for induction heating. IET Power Electronics (2023).
3. A Comparative Evaluation of Wide-Bandgap Semiconductors for High-Performance Domestic Induction Heating. Energies (2023).
4. Load Estimation for Induction Heating Cookers Based on Series RLC Natural Resonant Current. Energies (2022).
5. A study on de-icing for railway turnouts using 250kHz-200W-class induction heating system. AIP Advances (2019).