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This paper proposes a system with Non-linear Carrier (NLC) controller for a high-voltage gain Quadrupler Converter (QRC). The system is 400 V DC Micro Grid (DCMG) with Wind Energy Conversion System (WECS). The quadrupler converter is a non-isolated topology that achieves single-stage high voltage gain with a low duty ratio and reduced voltage stress of semiconductor devices. The proposed system assures robust dynamics against changing operating conditions, variations in circuit parameters, and external load conditions. The parameters, such as voltage gain, voltage ripple, current ripple, delay time, settling time and peak overshoot, are assessed to ensure the agility of the proposed system. The performance of the proposed system is analysed with various wind speeds using Matlab Simulink-based simulation studies. The results inferred that the proposed method provides a fast response for various input and load variations and high gain at low duty ratio. A 200 W wind-connected QRC system with an NLC controller prototype is developed to validate the simulation results. [ABSTRACT FROM AUTHOR]

This paper discusses about the fixed frequency pulse mask control based high frequency AC conversion circuit for industrial induction heating applications. Conventionally, for induction heating load, the output power control is achieved using the pulse with modulation based converters. The conventional converters do not guarantee the zero voltage switching condition required for the minimization of the switching losses. In this paper, pulse mask control scheme for the power control of induction heating load is proposed. This power control strategy allows the inverter to operate closer to the resonant frequency, to obtain zero voltage switching condition. The proposed high frequency AC power conversion circuit has lesser total harmonic distortion in the supply side. Modeling of the IH load, design of conversion circuit and principle of the control scheme and its implementation using low cost PIC controller are briefly discussed. Simulation results obtained using the Matlab environment are presented to illustrate the effectiveness of the pulse mask scheme. The obtained results indicate the reduction in losses, improvement in the output power and lesser harmonic distortion in the supply side by the proposed converter. The hardware results are in good agreement with the simulation results.

This article presents the investigations on the constant frequency asymmetric voltage cancellation control in the AC–AC resonant converter-fed domestic induction heating system. Conventional fixed frequency control techniques used in the high frequency converters lead to non-zero voltage switching operation and reduced output power. The proposed control technique produces higher output power than the conventional fixed-frequency control strategies. In this control technique, zero-voltage-switching operation is maintained during different duty cycle operation for reduction in the switching losses. Complete analysis of the induction heating power supply system with asymmetric voltage cancellation control is discussed in this article. Simulation and experimental study on constant frequency asymmetric voltage cancellation (CFAVC)-controlled full bridge series resonant inverter is performed. Time domain simulation results for the open and closed loop of the system are obtained using MATLAB simulation tool. The simulation results prove the control of voltage and power in a wide range. PID controller-based closed loop control system achieves the voltage regulation of the proposed system for the step change in load. Hardware implementation of the system under CFAVC control is done using the embedded controller. The simulation and experimental results validate the performance of the CFAVC control technique for series resonant-based induction cooking system. [ABSTRACT FROM PUBLISHER]