FPGA Implementation of a Switching Frequency Modulation Circuit for EMI Reduction in Resonant Inverters for Induction Heating Appliances

This paper presents the use of frequency modulation as a spread spectrum technique to reduce conducted electromagnetic interference (EMI) in the A frequency band (9-150 kHz) caused by resonant inverters used in induction heating home appliances. For sinusoidal, triangular, and sawtooth modulation pr...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2008-01, Vol.55 (1), p.11-20
Main Authors: Barragan, L.A., Navarro, D., Acero, J., Urriza, I., Burdio, J.M.
Format: Article
Language:English
Subjects:
Analytical models
Computer simulation
Digital circuits
Electromagnetic interference
Electromagnetic interference (EMI)
Field programmable gate arrays
field programmable gate arrays (FPGAs)
Frequency modulation
hardware design languages
Home appliances
induction heating
Inverters
Mathematical models
Modulation
Reduction
Resonant inverters
RLC circuits
Spectral analysis
Studies
Switching frequency
switching frequency modulation
VHDL
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Summary:This paper presents the use of frequency modulation as a spread spectrum technique to reduce conducted electromagnetic interference (EMI) in the A frequency band (9-150 kHz) caused by resonant inverters used in induction heating home appliances. For sinusoidal, triangular, and sawtooth modulation profiles, the influence of peak period deviation in EMI reduction and in the power delivered to the load is analyzed. A digital circuit that generates the best of the analyzed modulation profiles is implemented in a field programmable gate array. The design is modeled in a very-high-speed integrated circuits hardware description language (VHDL). The digital circuit, the power converter, and the spectrum analyzer are simulated all together using a mixed-signal simulation tool to verify the functionality of the VHDL description. The spectrum analyzer is modeled in VHDL-analog and mixed-signal extension language (VHDL-AMS) and takes into account the resolution bandwidth stipulated by the EMI measurement standard. Finally, the simulations are experimentally verified on a 3.5 kW resonant inverter operating at 35 kHz.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2007.896129