Series resonant multi-inverter prototype for domestic induction heating

Pérez‐Tarragona, Mario; Sarnago, Héctor; Lucía, Óscar; Burdío, J.M.

doi:10.1109/iecon.2015.7392156

Cited by 2 publications

(4 citation statements)

References 12 publications

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“…The identification procedure requires to acquire the load current and the output voltage for every load. Note that in the case of a multi‐output topology like the presented in [6], the output voltage can be considered the same for all the loads. For every section, a discrete Fourier transform (DFT) of output voltage and load current is computed at frequency

f_{normals w_{k}}

to get the first harmonic components

V_{k}

and

I_{k}

V_{k} = DFT falsefalse{v_{O_{k}} false(n false) falsefalse} = \sum_{n = 0}^{N - 1} v_{O_{k}} false(n false) \exp ()(, \frac{- 2 π f_{normals w_{k}} n j}{f_{normals}})

I_{k} = DFT falsefalse{i_{L_{k}} false(n false) falsefalse} = \sum_{n = 0}^{N - 1} i_{L_{k}} false(n false) \exp ()(, \frac{- 2 π f_{normals w_{k}} n j}{f_{normals}})

where

v_{O_{k}}

and

i_{L_{k}}

are the voltage and current in section k , N is the number of samples in the section, and

f_{normals}

is the sampling frequency.…”

Section: Identification Methodsmentioning

confidence: 99%

“…The identification procedure requires to acquire the load current and the output voltage for every load. Note that in the case of a multi-output topology like the presented in [6], the output voltage can be considered the same for all the loads. For every section, a discrete Fourier transform (DFT) of output voltage and load current is computed at frequency f swk to get the first harmonic components V k and I k :…”

Section: Classical Arrangement Of An Induction Hobmentioning

confidence: 99%

“…A least-squares algorithm is used to determine the resistance and inductance parameters (b R , m R , b L and m L ) in (6). Finally, the P-f function P fit (f sw ) is obtained by introducing the resulting expressions for R(f sw ) and L(f sw ) into the first-harmonic power equation…”

Section: Fig 2 Implemented Modulation Profilementioning

confidence: 99%

“…When a multiple‐output power converter has to be controlled, as in flexible cooking surfaces, several constraints appear depending on each set of pots and operating conditions. A series resonant multi‐inverter prototype is presented in [6]. It consists of a common half‐bridge inverter and nine RLC loads, each one connected to the inverter by a series switch.…”

Section: Introductionmentioning

confidence: 99%

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Fast power–frequency function estimation for induction heating appliances

et al. 2017

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Induction heating appliances use control algorithms to regulate the power delivered to the vessel in a wide range [50 W-3.5 kW]. Switching frequency is commonly used to control the delivered power, hence an accurate identification of the power-frequency function would be useful, especially in multiple-output power converters. However, this function exhibits a severe variability due to temperature or vessel-inductor geometrical alignment, what reduces the performance of the open-loop control strategies. A method is presented to estimate the power-frequency function in just half a period of the utility voltage. The method packs several switching frequencies in the short identification period. The load is modelled as an equivalent series resistance-inductance, where both parameters vary linearly with respect to the switching frequency. The method is able to safely estimate the function using only switching frequencies well above resonance, but crucially, it is able to extrapolate accurately the delivered power levels even close to resonance.

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