Pulse width modulation converter for light‐emitting diode tube light applications

Harikrishna, Vandavasi; Gunabalan, R.; Kumar, Sunil

doi:10.1002/2050-7038.12294

Cited by 4 publications

(2 citation statements)

References 19 publications

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“…The converter selection plays a vital role for LED driver applications. A DC-DC converter is operated in buck [5], boost [6] and buck-boost (BB) modes of operation based on the available input voltage. For automotive lighting applications, BB converter is generally preferred because of wide range of variations in input voltage.…”

Section: Introductionmentioning

confidence: 99%

Design of Robust Guaranteed Margin Stability Region PI Controller for Automotive LED Lighting With Parameter Uncertainty

Sureshkumar

Gunabalan

2022

IEEE Access

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In the modern era, automotive light emitting diode (LED) lighting technologies are booming as a result of high luminous intensity, long life, compact size, high energy efficiency, high reliability etc. As the load is sensitive for input parametric variations, it is essential to regulate the load voltage and current with respect to system specifications. Hence, there is a need for fast response robust controller to feed the required voltage and current during abnormal conditions. In this paper, a robust controller is designed for single switch control buck boost converter for automotive LED lighting. A small signal modelling of the converter is developed with perturbed state variables to analyze the dynamic behavior of the system. The system with dynamic controller has a zero in the right-hand side of the s-plane, which results in poor closed loop stability. Hence, a robust controller is designed with Kharitonov's theorem by considering the uncertain variations in the converter parameters. A robust performance region is obtained by considering guaranteed gain margin and phase margin benchmark. In this region, the optimal PI controller gain values are obtained using Kharitonov's sixteen plants theorem. The obtained gain values make the system with minimum oscillation, fast settling time, right hand side zero compensation and stability of the system. The performance analysis is compared with the conventional PI controller and to ensure the peak value of sensitivity for robust controller. The simulation of the system is performed in PSIM and validated in real time using dSPACE1103 controller with experimental results.INDEX TERMS DC-DC power converter, Kharitonov's theorem, LED lamps, robust control, stability, uncertain systems.

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Section: Introductionmentioning

confidence: 99%

Design of Robust Guaranteed Margin Stability Region PI Controller for Automotive LED Lighting With Parameter Uncertainty

Sureshkumar

Gunabalan

2022

IEEE Access

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“…DC‐DC converter plays an important role in designing the LED driver circuit. In general, based on power converter stage, the converters are classified as single stage, 7 one and half stage, 8 and multi stage 9,10 . In single stage, the input DC voltage is directly converted as per the load requirement, whereas in one and half stage, two DC‐DC converters are used to feed power to the LED load.…”

Section: Introductionmentioning

confidence: 99%

Design and implementation of single switch control DC ‐ DC converter with wide input variation in automotive LED lighting

Sureshkumar

Gunabalan

2021

Int Trans Electr Energ Syst

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Summary In the emerging automobile fields, head light plays a vital role in the aspect of safety. Only a fraction of total power from the battery should be utilized for its operation. In conventional lighting technologies, head light consumes high power, less efficient and also struggles for the variation of input voltage. This paper proposes a simple modified half bridge converter (MHBC) design for automotive lighting applications. The converter has two switches in which duty cycle of one switch is controlled and other one remains fixed at a particular duty cycle. This reduces the control complexity. In addition, the converter is capable of operating in buck and boost mode which is much essential for source variation. The parasitic state space model of the converter is derived using state averaging technique, which helps in obtaining the realistic operation of the converter. Stability analysis is carried out for the proposed model, which is in line with the practical model. The obtained frequency response curve helps in calculating the stable operating range of the duty cycle. The conduction and switching losses are calculated to get the efficiency of the system. The simulation of the proposed system is performed in PSIM software and a prototype model is realized with 21 W power rating. The performance of the converter is tested under wide input voltage variation (10 to 50 V) for a 30 V/0.7A light‐emitting diode string.

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Performance Comparison of Two-Stage LED Driver for Tube Light Applications

Harikrishna¹,

Gunabalan²

2021

Handbook of Smart Materials, Technologies, and Devices

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Pulse width modulation converter for light‐emitting diode tube light applications

Cited by 4 publications

References 19 publications

Design of Robust Guaranteed Margin Stability Region PI Controller for Automotive LED Lighting With Parameter Uncertainty

Design of Robust Guaranteed Margin Stability Region PI Controller for Automotive LED Lighting With Parameter Uncertainty

Design and implementation of single switch control DC ‐ DC converter with wide input variation in automotive LED lighting

Performance Comparison of Two-Stage LED Driver for Tube Light Applications

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