Phase Locked Loop based Pulse Density Modulation Scheme for the Power Control of Induction Heating Applications

Nagarajan, Booma; Sathi, Rama Reddy

doi:10.6113/jpe.2015.15.1.65

Cited by 15 publications

(8 citation statements)

References 20 publications

(18 reference statements)

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“…The research showed the advantages of implementing a Current Source Parallel Resonant Push-Pull Inverter (CSPRPI) and the possibilities of achieving ZVS with low switching losses. A similar topology based on a half-bridge but a series resonant tank was also proven to have a stable operation at ZVS [24]. Furthermore, the same source proved that these classes of converters can be controlled with a simple phase-locked loop based on a variable duty cycle.…”

Section: Introductionmentioning

confidence: 89%

Design, Analysis and Experimental Verification of the Self-Resonant Inverter for Induction Heating Crucible Melting Furnace Based on IGBTs Connected in Parallel

et al. 2021

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The object of this research was a self-resonated inverter, based on paralleled Insulated-Gate Bipolar Transistors (IGBTs), for high-frequency induction heating equipment, operating in a wide range of output powers, applicable for research and industrial purposes. For the nominal installed capacity for these types of invertors to be improved, the presented inverter with a modified circuit comprising IGBT transistors connected in parallel was explored. The suggested topology required several engineering problems to be solved: minimisation of the current mismatch amongst the paralleled transistors; a precise analysis of the dynamic and static transistors’ parameters; determination of the derating and mismatch factors necessary for a reliable design; experimental verification confirming the applicability of the suggested topology in the investigated inverter. This paper presents the design and analysis of IGBT transistors based on datasheet parameters and mathematical apparatus application. The expected current mismatch and the necessary derating factor, based on the expected mismatch in transistor parameters in a production lot, were determined. The suggested design was experimentally tested and investigated using a self-resonant inverter model in a melting crucible induction laboratory furnace.

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Section: Introductionmentioning

confidence: 89%

Design, Analysis and Experimental Verification of the Self-Resonant Inverter for Induction Heating Crucible Melting Furnace Based on IGBTs Connected in Parallel

et al. 2021

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“…VCO output signal, the last part of the PLL circuit, and the triangular generator are compared by a comparator to obtain PWM pulses. The PWM signal obtained by the PLL circuit forms the input signal of the PDM control circuit [10,24].…”

Section: Pll Structurementioning

confidence: 99%

Comparison of regular and irregular 32 pulse density modulation patterns for induction heating

Karafil

Özbay

Öncü

2020

IET Power Electronics

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In this study, an induction heating (IH) application is carried out by transferring the maximum power extracted from photovoltaic (PV) panels to the stainless steel with the designed regular and irregular 32 pulse density modulation (PDM) controlled series resonant inverter. The main objective of this study is to analyse the changes in the system due to regular and irregular PDM patterns. Maximum power point tracker (MPPT) is used to control the output power at different solar irradiation values with varying PDM patterns. Regular and irregular PDM control methods are compared in terms of MPPT efficiency, cost, algorithm complexity, logic control structure and current/voltage stresses of the power switches. Zero current switching (ZCS) conditions are provided by using phase locked loop (PLL) technique at all power points of the PV system. The appropriate switching conditions are tracked continuously at resonant frequency, and therefore soft switching is realised. Perturb and observe (P&O) algorithm is used with the aim of tracking the maximum power in PV panels and high tracking efficiency is obtained with PDM-controlled P&O MPPT algorithm. ATMEL328P-AU microcontroller is used to control the inverter in the system.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…In these control methods, switching losses and electromagnetic interference (EMI) are quite high and soft switching cannot be performed at all power levels. Pulse density modulation (PDM) is one of the alternative solutions for these problems [23][24][25]. In this study, a PDM control technique based on the principle of deleting some of the switching signals was used in order to enable the system to control the power by providing the soft switching conditions at each power level.…”

Section: Introductionmentioning

confidence: 99%

Sliding mode PLL-PDM controller for induction heating system

Özbay¹,

Karafil²,

Öncü³

2021

Turk J Elec Eng & Comp Sci

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In this study, a sliding mode controlled phase locked loop (SMC-PLL) was developed for induction heating (IH) applications with a resonant inverter. PLL applications are widely used in induction heating applications to achieve zero voltage switching and zero current switching. In many PLL applications, the frequency tracking is too slow and unreliable. Therefore, a sliding mode controller was developed to provide robust and fast PLL. Furthermore, a pulse density modulation (PDM) control strategy was developed to work at the resonant frequency for all power levels. The PDM power control is a good solution for the design of high-frequency inverters because of a great reduction of switching losses and electromagnetic noise. The PDM pattern for the desired output power is determined according to the set temperature value of the work piece. The proposed system was simulated in PSIM and a 250-W laboratory prototype was implemented with operating frequency of 35-42 kHz.

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Phase Locked Loop based Pulse Density Modulation Scheme for the Power Control of Induction Heating Applications

Cited by 15 publications

References 20 publications

Design, Analysis and Experimental Verification of the Self-Resonant Inverter for Induction Heating Crucible Melting Furnace Based on IGBTs Connected in Parallel

Design, Analysis and Experimental Verification of the Self-Resonant Inverter for Induction Heating Crucible Melting Furnace Based on IGBTs Connected in Parallel

Comparison of regular and irregular 32 pulse density modulation patterns for induction heating

Sliding mode PLL-PDM controller for induction heating system

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