Early in the morning, Jenny effortlessly prepared her lunch using a suite of induction heating appliances: a milk frother for a rich Italian coffee, a slow cooker for a prepared soup, a rice cooker for freshly steamed rice, and finally, an induction hob to quickly stir-fry a plate of beef. This convenient routine, powered by four efficient induction devices, is becoming a hallmark of modern, refined living.
Among heating methods, induction technology stands out. Induction hobs, for instance, boast approximately 40% higher thermal efficiency than traditional gas stoves, boiling a quart (~940ml) of water in just 5 minutes and 50 seconds—about 2 minutes and 40 seconds faster. Furthermore, their smooth, easy-to-clean glass-ceramic surfaces offer significant aesthetic and practical advantages for the contemporary kitchen.
These compact and portable appliances are particularly appealing to young professionals with limited space and dynamic lifestyles. However, this market segment faces new challenges as consumers increasingly prioritize not only design and seamless surfaces but also energy efficiency, with many eco-conscious buyers making choices based directly on energy rating labels.
So, how can manufacturers design induction appliances that meet these user demands while controlling costs?
An induction hob operates similarly to a transformer, using electromagnetic induction to convert electrical energy into heat. An alternating current (20kHz to 75kHz) passes through a coil beneath the surface, creating a magnetic field that induces eddy currents in compatible cookware, causing it to heat up. The spacing between the coil and the cookware, the coil's size, and material choices directly impact heating efficiency and energy consumption.
At the circuit design level, induction hobs often use resonant inverter topologies. Desktop hobs, typically limited to around 2.1kW, are well-suited for a Single-Ended Parallel Resonant (SEPR) design. In this setup, the Insulated Gate Bipolar Transistor (IGBT) is a critical component for controlling the resonant current, and its performance directly affects the overall efficiency and reliability of the appliance.
As a renowned half-bridge induction hob supplier and built-in induction cooker manufacturer, Katro Appliances has integrated Infineon's TRENCHSTOP™ RC-H series Reverse-Conducting IGBTs into its new generation of induction hobs. These components are optimized for SEPR topologies. Their soft-switching capabilities significantly reduce switching losses, improving overall energy efficiency. Compared to previous generations, these IGBTs can lower switching losses by up to 20%, allowing hobs to operate stably at higher frequencies while more easily meeting Electromagnetic Compatibility (EMC) requirements.
Furthermore, common challenges in induction heating applications—such as current inrush, voltage surges, and failure to achieve Zero Voltage Switching (ZVS)—can push IGBTs beyond their Safe Operating Area (SOA). To address this, Infineon offers ""Fully Protected IGBTs,"" which integrate current and voltage protection. These devices monitor current and voltage on a cycle-by-cycle basis, effectively limiting resonant energy, peak current, and IGBT voltage, significantly enhancing system robustness.
By incorporating this technology into its half-bridge hob designs, Katro Home Appliances achieves superior energy efficiency while improving product durability and safety. Their hobs maintain stable output under complex operating conditions—such as low-power operation, pan detection, and sudden pan removal—preventing component failure caused by voltage fluctuations or sudden load changes.
It is worth noting that these IGBTs use a multi-pin TO-247 package, which offers higher creepage distance and better thermal performance within a compact space, allowing manufacturers to upgrade existing designs without major structural changes.
In summary, under the dual trends of energy saving and integration, high-performance IGBT-based induction solutions are becoming a key direction for kitchen appliance advancement. As a professional kitchen hob supplier, Katro Appliances, through the adoption of Infineon's advanced IGBT technology, not only enhances the energy efficiency of its products but also delivers a quieter, cleaner, and safer cooking experience for consumers.
