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The state-of-the-art of induction heating technology requires more and more multivariable control systems able to provide a suitable response for a wide set of vessels to be heated. The goal of this paper is to propose a small signal model of a multivariable system, a dual half-bridge series resonant inverter sharing a common resonant capacitor. A Phase Shift Square Wave Modulation (PSSWM) is considered...
Resonant power converters are widely used in domestic induction heating (IH) cooktops due to their advantages in terms of size, efficiency, and power density. The wide range of different induction loads (with different electrical equivalent) and the wide range of required output powers, lead to the load identification as a mandatory and specially challenging aspect. This identification is needed to...
Domestic induction heating applications require an accurate control of the power delivered to the vessel to be heated, ensuring power topology operation under safety conditions. Particularly, this paper is focused on applying a power control of two induction heating loads in a dual-half bridge sharing a common resonant capacitor. This topology leads to a control strategy harder than the classical...
This paper presents a method to measure off-line the frequency-to-output-power transfer function of a resonant inverter in open-loop. This method is applied to a half-bridge series resonant inverter for domestic induction heating applications. A sinusoidal perturbation is injected to the nominal value of the switching frequency, leading to a perturbation in the power transferred to the load. The Discrete...
Current technology for domestic induction heating requires to deliver a wide range of power (50 W–3.5 kW) to the vessel to be heated. In addition to this, the considered power control strategy must ensure high reachability and compliance with some constraints. This work is focused on applying the Phase Shift Control (PSC) modulation to control the power delivered to two induction loads. The considered...
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