Asymmetrical Noncomplementary Modulation Strategies for Independent Power Control in Multioutput Resonant Inverters

Abstract

Domestic induction heating design trends aim at improving user experience by increasing the cooking surface flexibility while maintaining a cost-effective implementation. The design of multi-output topologies is a key development for this purpose. However, due to their complexity, output power control usually relies on low-frequency pulse density modulations which, in addition to the slow response due to significant power averaging times, presents severe restrictions as a consequence of power pulsation regulations. This paper proposes two different noncomplementary asymmetrical modulation strategies that allow continuous operation avoiding both flicker and heating performance issues, and obtaining a fast-response load power control. In order to prove the feasibility of the proposed modulations, a prototype featuring 12 induction heating loads of 2000 W maximum rated power has been built, and both strategies have been tested.

Deep Learning Implementation of Model Predictive Control for Multioutput Resonant Converters

“…The experimental setup shown in Figure 9 uses the prototype presented in [32] with two connected inductors and two equal material pots on top of each of them. Figure 11 shows the main waveforms in a power stepdown change and a power stepup change starting in equal power transmission.…”

“…Based on that operation principle, several modulation strategies have been proposed on the literature [32]. In this paper, non-complementary pulse delay control (NC-PDC) modulation is selected.…”

Implementación de multi-inversor resonante mediante dispositivos de banda ancha para calentamiento por inducción doméstico

“…1 (a)) es posible un control independiente de la potencia entregada a cada carga modificando, por un lado, la frecuencia de conmutación, f sw , y ciclo de servicio, D, que son comunes a todas las cargas, y por otro, el ángulo de disparo, α i , que es le parámetro independiente (Fig. 1 (b)) [3].…”

Multi-Output Resonant Power Converters for Domestic Induction Heating

“…An alternative to the ZCS matrix is the ZVS matrix presented in [44] and derived from the HB. This structure presents a unidimensional version that increases the device count but presents improved power control [45] (Fig. 21).…”