Intermodulation distortion in 1SW-ZVS multi-inverter for induction heating home appliances

Gaudó, Pilar Molina; Bernal, Carlos; Avellaned, J.; Burdío, J.M.

doi:10.1109/apec.2012.6166131

Cited by 8 publications

(6 citation statements)

References 7 publications

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“…This modulation is based on modifying the switching frequency f sw and the phase shift between both output voltage inverters. Both inverters operate at the same f sw in order to avoid acoustic noise [6]. Moreover, a square wave modulation is considered (D=0.5) to prevent an earlier ZVS loss.…”

Section: Phase Shift Square Wave Modulationmentioning

confidence: 99%

Decoupling output power control of two series resonant inverters sharing resonant capacitor for domestic induction heating

Domínguez

Barragán

Otín

et al. 2014

2014 IEEE 15th Workshop on Control and Modeling for Power Electronics (COMPEL)

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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 arrangement which features a dedicated resonant capacitor. A Phase Shift Square Wave Modulation (PSSWM) is performed to control the output powers of the vessels to be heated. Thus, the considered plant is a twoinput two-output (TITO) system. The two control inputs are (f sw , ) and the two outputs are (P 1 , P 2 ). Since the transfer function matrix is not diagonal, the Relative Gain Array (RGA) methodology is used to analyze if a multi-loop control is feasible. Due to the fact that the system is strongly coupled a centralized control must be applied. Therefore, the aim of the paper is to apply a decoupling control to handle the interactions. Simulation and experimental results in an induction heating prototype are performed in order to validate the proposed control technique.

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Section: Phase Shift Square Wave Modulationmentioning

confidence: 99%

Decoupling output power control of two series resonant inverters sharing resonant capacitor for domestic induction heating

Domínguez

Barragán

Otín

et al. 2014

2014 IEEE 15th Workshop on Control and Modeling for Power Electronics (COMPEL)

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“…Since, unlike in induction motors, the operating switching frequency is above the audible range in domestic IH systems [18]; acoustic noise is avoided operating the inverter at switching frequencies above 20 kHz using CB-PWM [1]. Assuming that the inverters use variable frequency control to adjust the power delivered to the load, audible noise can appear when two or more inverters connected to a common supply and sharing the same EMI filter are operated at the same time with different switching frequencies whose difference lies within the audible frequency range [19]. In order to avoid audible noise, some works [19]- [22] propose to operate the inverters with a switching frequency difference, in absolute value, smaller or equal than a given low frequency f L or greater than another high frequency f H according to a given threshold of audibility.…”

Section: Introductionmentioning

confidence: 99%

“…The Spectral Flatness Measure (SFM) [27] will be used to quantify the noise-like or tone-like nature of the spectrum of i 2 L in the band [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. For tonal signals, SFM is close to 0; and it is close to 1 for noise signals.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Acoustic Noise Spectrum of Domestic Induction Heating Systems Controlled by Phase-Accumulator Modulators

Villa

Artigas

Beltrán

et al. 2019

IEEE Trans. Ind. Electron.

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In domestic induction heating (IH) applications, the modulation technique applied to the inverter has a high influence on the acoustic noise emissions. These noise emissions must be avoided since they may be audible and annoying to the final user. This paper analyzes the acoustic noise emissions that appear when a series half-bridge resonant inverter is operated with a phaseaccumulator based modulator. This modulation technique has the advantage of operating in the frequency domain, and it is compared with the classical PWM modulator regarding the audible noise generated. The frequencies of the tones in the acoustic noise spectrum are theoretically calculated from the parameters of the phase-accumulator based modulator. The SFM (Spectral Flatness Measure) is used to quantify the number of cases in which tones are generated by the modulation. Two techniques are applied to the phase-accumulator based modulator and their effect is tested. Theoretical results are experimentally verified.

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“…Halfbridge Si IGBT resonant topology is the most popular one but one-switch resonant zero-voltage-switching inverters are also gaining interest for multi-inverter multi-inductor appliances [2] for their low cost, high efficiency and easyness for the transistor driver. Recent research in Silicon Carbide (SiC) devices, with higher breakdown voltages and higher operation frequencies, pertain to the utilization of this topology [3][4][5] with only one device and simplified driver and also enabling operation frequencies up to 400 kHz. Still, flexibility issues arise when using one-switch inverters for induction heating applications due to significant load variations inherent to the application.…”

Section: Introductionmentioning

confidence: 99%

Single switch quasi-resonant inverter on Silicon Carbide with regenerative snubber for induction heating appliances

Bernal

Avellaned

Milla

2014

2014 16th European Conference on Power Electronics and Applications

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One of the main problems of power inverters designed for induction heating home appliances is the broad variance of possible loads. One-switch resonant inverters for induction heating are designed to increased power as frequency decreases; duty cycle is later computed to achieve Zero Voltage Switching (ZVS) condition. To further reduce the output power, over minimum at obtained at Zero Voltage and Derivate Switching (ZVDS), and allow independent control of power with frequency, sophisticated control techniques need to be applied, but depending on load, non-ZVS switching conditions may occur therefore degrading the performance and efficiency. This paper proposes a regenerative inductive snubber capable of reduce transistor losses in non-ZVS conditions. In this proposal, the snubber is actually a minor part of the induction coil. Therefore, the power delivered to the snubber is part of the output. Experimental results show good agreement with the theoretical equations.

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Intermodulation distortion in 1SW-ZVS multi-inverter for induction heating home appliances

Cited by 8 publications

References 7 publications

Decoupling output power control of two series resonant inverters sharing resonant capacitor for domestic induction heating

Decoupling output power control of two series resonant inverters sharing resonant capacitor for domestic induction heating

Analysis of the Acoustic Noise Spectrum of Domestic Induction Heating Systems Controlled by Phase-Accumulator Modulators

Single switch quasi-resonant inverter on Silicon Carbide with regenerative snubber for induction heating appliances

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