Self-oscillating half bridge series resonant converter at high efficiency

Belloumi, Hamed; Kourda, Ferid

doi:10.1109/melcon.2012.6196438

Cited by 6 publications

(4 citation statements)

References 3 publications

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“…The primary and secondary circuit reactance increase several times over with the decline of coupled coefficient and increase of operating frequency of the separable transformer [11]. In order to achieve a certain power output, the power supply voltage must be raised and the utilization rate of the system will be reduced greatly.…”

Section: Capacitance Compensationmentioning

confidence: 99%

Optimum Efficiency Analysis and Simulation for Separable Transformer of Contactless Excitation Energy Transfer

Liu¹,

Wang²,

Gong³

2016

IJHIT

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Section: Capacitance Compensationmentioning

confidence: 99%

Optimum Efficiency Analysis and Simulation for Separable Transformer of Contactless Excitation Energy Transfer

Liu¹,

Wang²,

Gong³

2016

IJHIT

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“…C 1 is primary compensation capacitor and C 2 is secondary compensation capacitor. System efficiency is just only 50% in series & series harmonic compensation circuit under the maximum output power [6]. System could realize maximum output power based on optimized mutual inductance coupling parameter at the expense of dramatic decline of efficiency.…”

Section: Parameters Optimized Analysis Based On Optimum Mutual Inductmentioning

confidence: 99%

Optimized Design of Mutual Inductance Parameter in Separable Magnetic Pot Transformer used for Noncontact Energy Coupling System

Liu¹,

Lu²,

Zhang³

2015

Proceedings of the 4th International Conference on Information Technology and Management Innovation

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Abstract. Energy coupling realized by separable magnetic pot transformer as new approach of rotor excitation in synchronous machine could replace brushes and slip rings of traditional excitation. For new noncontact energy coupling (NEC) system, its research about energy and efficiency quality still remains a low level because application and research of NEC aren't comprehensive, especially how to improve transmission power and efficiency is still not enough. In this paper, series & series resonance compensation circuit was designed, and this compensation circuit would make the circuit have high transmission efficiency. Then, optimum mutual inductance was proposed. We can consider efficiency, system cost, reliability and so on based on maximum output power in order to get optimum mutual inductance. Mutual inductance coupling parameter would be optimized by adjusting structure of separable transformer and realizing optimum design of system efficiency characteristic at minimum cost. Although the output power had little increase, Ansoft 3D simulation research proved that system has high electromagnetic coupling characteristic based on optimum mutual inductance. The results of experiment also proved that efficiency of system had a quite handsome increase and verified the validity of theory analysis.

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“…1a. By using the fundamental frequency approximation [11], the voltage source V 1 (t) represents the fundamental component of the square waveform generated by the half-bridge transistors, and the voltage V 1S (t) represents the fundamental component of the voltage across the resistance…”

Section: Circuit Description and Operationmentioning

confidence: 99%

“…1 a . By using the fundamental frequency approximation [11], the voltage source V 1 ( t ) represents the fundamental component of the square waveform generated by the half‐bridge transistors, and the voltage V 1S ( t ) represents the fundamental component of the voltage across the resistance R eq

V_{1} false(t false) = \frac{2}{π} E \sin false(ω t)

V_{1 S} false(t false) = \frac{4}{π} \frac{V_{S}}{m} \sin (w t + φ false)

The converter net load formed by the transformer, the rectifier, filter and load can be modelled as an effective resistance connected in series with an equivalent inductor [12, 13]

R_{eq} = \frac{8}{π^{2} m^{2}} R

Given that F = 110 kHz and L m = 220 µH and based on (3) we have

X_{L_{normalm}} = = L_{normalm} ω = 147 normalΩ ≫ R_{eq} = 15 normalΩ

Thereafter, we can neglect the reactance

X_{L_{normalm}}

compared with the equivalent resistance R eq . As a consequence, the value of the equivalent inductor L eq is given by (5)

L_{eq} = L + l_{1} + l_{2}

Starting from Fig.…”

Section: Circuit Description and Operationmentioning

confidence: 99%

Double modulation control scheme for a DC/DC converter applied to a battery charger

Belloumi

Kourda

2014

IET Power Electronics

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In this study, a novel control scheme for controlling a self-oscillating half-bridge series resonant converter for DC source and secondary battery interface is proposed. This new control scheme is used to control and regulate the DC output current of the converter. The proposed control scheme has the advantages of not only wide power regulation range, but also ease of output current control. In addition, it can achieve a stable and efficient zero-voltage-switching (ZVS) in a whole load range. The control principles of the proposed method are described in detail and its validity is verified through simulated and experimental results based on a 24 V 125 Ah battery charger. The maximum charging efficiency of the proposed topology during the overall charging period exceeds 90%.

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Self-oscillating half bridge series resonant converter at high efficiency

Cited by 6 publications

References 3 publications

Optimum Efficiency Analysis and Simulation for Separable Transformer of Contactless Excitation Energy Transfer

Optimum Efficiency Analysis and Simulation for Separable Transformer of Contactless Excitation Energy Transfer

Optimized Design of Mutual Inductance Parameter in Separable Magnetic Pot Transformer used for Noncontact Energy Coupling System

Double modulation control scheme for a DC/DC converter applied to a battery charger

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