Asymmetrical Voltage-Cancellation Control for Full-Bridge Series Resonant Inverters

Burdío, J.M.; Barragán, L.A.; Monterde, F.; Navarro, D.; Acero, J.

doi:10.1109/tpel.2003.823250

Cited by 198 publications

(92 citation statements)

References 15 publications

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“…By the definition of the quality factor of the resonant circuit given in equation (15), the equivalent inductance L eq of the heating coil with Q L of 1.28 is given by:…”

Section: Design Procedures Of the Circuit Constraintsmentioning

confidence: 99%

“…Asymmetrical voltage control strategy is also used for the control of output power. It gives improved efficiency due to its constant switching frequency and ZVS operation [15].This method results in high turn on losses under low load conditions due to the NON-ZVS operation of the switches. A discontinuous mode power control scheme for loss minimization is also discussed in the literatures [15]- [18].…”

Section: Introductionmentioning

confidence: 99%

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

Nagarajan¹,

Sathi²

2015

Journal of Power Electronics

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Resonant converters are well suited for induction heating (IH) applications due to their advantages such as efficiency and power density. The control systems of these appliances should provide smooth and wide power control with fewer losses. In this paper, a simple phase locked loop (PLL) based variable duty cycle (VDC) pulse density modulation (PDM) power control scheme for use in class-D inverters for IH loads is proposed. This VDC PDM control method provides a wide power control range. This control scheme also achieves stable and efficient Zero-Voltage-Switching (ZVS) operation over a wide load range. Analysis and modeling of an IH load is done to perform a time domain simulation. The design and output power analysis of a class-D inverter are done for both the conventional pulse width modulation (PWM) and the proposed PLL based VDC PDM methods. The control principles of the proposed method are described in detail. The validity of the proposed control scheme is verified through MATLAB simulations. The PLL loop maintains operation closer to the resonant frequency irrespective of variations in the load parameters. The proposed control scheme provides a linear output power variation to simplify the control logic. A prototype of the class-D inverter system is implemented to validate the simulation results.

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“…By the definition of the quality factor of the resonant circuit given in equation (15), the equivalent inductance L eq of the heating coil with Q L of 1.28 is given by:…”

Section: Design Procedures Of the Circuit Constraintsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Nagarajan¹,

Sathi²

2015

Journal of Power Electronics

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show abstract

“…These methods improve the performance of the inverter in several aspects. ZVS problem is also minimized by techniques such as asymmetrical voltage cancellation (AVC) and asymmetrical duty cycle (ADC) control [10]. In [11], two operating modes for power control of half-bridge resonant inverter induction heating system are described.…”

Section: Fig 1 Typical Arrangement Of High Frequency Induction Heatmentioning

confidence: 99%

“…4, T on and T/2 are shown with gating pulses for load-1 half-bridge inverter. Analysis of asymmetrical duty cycle control for series resonant inverter is presented in [10]. Harmonics in load current waveform are negligibly small and ignored.…”

Section: Proposed Inverter Configurationmentioning

confidence: 99%

Buck-Boost Interleaved Inverter Configuration for Multiple-Load Induction Cooking Application

P¹,

Vishwanathan²,

Murthy³

2015

Journal of Electrical Engineering and Technology

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-Induction cooking application with multiple loads need high power inverters and appropriate control techniques. This paper proposes an inverter configuration with buck-boost converter for multiple load induction cooking application with independent control of each load. It uses one half-bridge for each load. For a given dc supply of V DC , one more V DC is derived using buckboost converter giving 2V DC as the input to each half-bridge inverter. Series resonant loads are connected between the centre point of 2 V DC and each half-bridge. The output voltage across each load is like that of a full-bridge inverter. In the proposed configuration, half of the output power is supplied to each load directly from the source and remaining half of the output power is supplied to each load through buck-boost converter. With buck-boost converter, each half-bridge inverter output power is increased to a full-bridge inverter output power level. Each half-bridge is operated with constant and same switching frequency with asymmetrical duty cycle (ADC) control technique. By ADC, output power of each load is independently controlled. This configuration also offers reduced component count. The proposed inverter configuration is simulated and experimentally verified with two loads. Simulation and experimental results are in good agreement. This configuration can be extended to multiple loads.

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“…Input dc source could be an unregulated source (obtained with single-phase or threephase diode rectifier and filter) or could be a regulated voltage source (obtained with single-phase or three-phase diode/SCR rectifier and filter or another front-end switchmode regulator). In the former case, regulation of the power to the work piece should be done in the RI stage using frequency variation [23,24], fixed-frequency pulse width modulation (PWM) [25][26][27], or pulse density modulation (PDM) [28,29]. In the latter case, the output control can be done by varying , providing easy control of the output power over a wide range.…”

Section: Introductionmentioning

confidence: 99%

A 25 kW, 25 kHz Induction Heating Power Supply for MOVPE System Using L-LC Resonant Inverter

Borage

Tiwari

2013

Advances in Power Electronics

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A topology named L-LC resonant inverter (RI) for induction heating (IH) applications takes most of the merits of the conventional series and parallel resonant schemes, while eliminating their limitations. In this paper, fundamental frequency AC analysis of L-LC RI is revisited, and a new operating point is suggested featuring enhanced current gain and near in-phase operation as compared to the conventional operating point. An approximate analysis of the circuit with square-wave voltage source is also described highlighting the effect of auxiliary inductor on the source current waveform. The analysis also leads to an optimum choice of the auxiliary inductance. The requirements of the metal organic vapour phase epitaxy (MOVPE) system in which a graphite susceptor is required to be heated to 1200 ∘ C demanding a 25 kW, 25 kHz IH power supply, the configuration of developed IH system, and experimental results are presented.

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Asymmetrical Voltage-Cancellation Control for Full-Bridge Series Resonant Inverters

Cited by 198 publications

References 15 publications

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

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

Buck-Boost Interleaved Inverter Configuration for Multiple-Load Induction Cooking Application

A 25 kW, 25 kHz Induction Heating Power Supply for MOVPE System Using L-LC Resonant Inverter

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