Inductor snubber-assisted series resonant ZCS-PFM high frequency inverter link DC-DC converter with voltage multiplier

Ogura, K.; Chu, Enhui; Ishitobi, Manabu; Nakamura, M.; Nakaoka, Mutsuo

doi:10.1109/pcc.2002.998532

Cited by 34 publications

(14 citation statements)

References 2 publications

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“…Though the transformer winding capacitance is not absorbed in the tank circuit, the SRC has been used in high voltage converters due to several other advantages [6]- [11]. The most significant feature of the SRC is the ability to provide high output load current [1,4,11]- [16]. Moreover, a pulse frequency modulated SR inverter has nearly zero switching loss when operating in the discontinuous conduction mode (DCM).…”

Section: Jinst 6 P09008mentioning

confidence: 99%

Combined resonant tank capacitance and pulse frequency modulation control for ZCS-SR inverter-fed high voltage DC power supply

Lee¹,

Iqbal²,

Jamil³

2011

J. Inst.

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Conventional pulse frequency modulated (PFM) zero current switching (ZCS) series resonant (SR) inverter fed high voltage dc power supplies have nearly zero switching loss. However, they have limitations of poor controllability at light loads and large output voltage ripple at low switching frequencies. To address these problems, this paper proposes a combined resonant tank capacitance and pulse frequency modulation based control approach. For the realization of the proposed control approach, the tank circuit of the resonant inverter is made up of several resonant capacitors that are switched into or out of the tank circuit by electromechanical switches. The output voltage of the converter is regulated by digitally modulating the resonant tank capacitance and narrowly varying the switching frequency. The proposed control scheme has several features, namely a wide range of controllability even at light loads, less output voltage ripple, and less current stress on the inverter's power switches at light loads. Therefore, the proposed control approach alleviates most of the problems associated with conventional PFM. Experimental results obtained from a scaled down laboratory prototype are presented to verify the effectiveness of the proposed system.

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Section: Jinst 6 P09008mentioning

confidence: 99%

Combined resonant tank capacitance and pulse frequency modulation control for ZCS-SR inverter-fed high voltage DC power supply

Lee¹,

Iqbal²,

Jamil³

2011

J. Inst.

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“…All of these resonant converters have some merits and demerits. However, a SRC is often used in high‐voltage power supplies because of its numerous advantages: it is free from possible saturation of the HVT, it absorbs the leakage inductance of the transformer into the power topology, it behaves as a current source, which provides inherent overload protection, it allows capacitive filtering at the output and gives high efficiencies over a wide range of loads, and it is able to provide a high output load current . A SRC can be operated in discontinuous conduction mode (DCM) with zero‐current switching (ZCS) or in continuous conduction mode (CCM) of operation under zero‐voltage conditions (ZVS) with switching frequency above resonance .…”

Section: Introductionmentioning

confidence: 99%

“…A SRC can be operated in discontinuous conduction mode (DCM) with zero‐current switching (ZCS) or in continuous conduction mode (CCM) of operation under zero‐voltage conditions (ZVS) with switching frequency above resonance . In the literature, many topologies of SRC have been proposed for high‐voltage applications . However, these topologies require a large number of power switches and, consequently, they have high conduction loss and low efficiency.…”

Section: Introductionmentioning

confidence: 99%

Series resonant high‐voltage DC–DC converter with reduced component count

Samsudin

Iqbal

Taib

2016

IEEJ Transactions Elec Engng

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This paper proposes a novel zero-current-switching series resonant high-voltage DC-DC converter with reduced component count. The series resonant inverter in the proposed topology has two power switches (insulated-gate bipolar transistors, IGBTs), two resonant capacitors, and only one high-voltage transformer (HVT) with center-tapped primary windings. The power switches are connected in the form of a half-bridge network. The leakage inductances of the transformer's primary windings together with the resonant capacitors form two series resonant circuits. The series resonant circuits are fed alternately by operating the power switches with interleaved half switching cycle. The secondary winding of the HVT is connected to a bridge rectifier circuit to rectify the secondary voltage. The converter operates in the discontinuous conduction mode (DCM) and its output voltage is regulated by pulse frequency modulation. Therefore, all the power switches turn on and off at the zero-current switching condition. The main features of the proposed converter are its lower core loss, lower cost, and smaller size compared to previously proposed double series resonant high voltage DC-DC converters. The experimental results of a 130-W prototype of the proposed converter are presented. The results confirm the excellent operation and performance of the converter.

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“…Though the transformer winding capacitance is not absorbed in the tank circuit, SRC has been used in the high voltage converters due to several other advantages [6]- [11]. The most significant feature of SRC is the ability to provide high output load current [1], [4], [11]- [16]. Moreover, a pulse frequency modulated SR inverter has nearly zero switching loss when operating in discontinuous conduction mode (DCM).…”

Section: Introduction (Heading 1)mentioning

confidence: 99%

Multi-output ZCS-SR inverter fed high voltage DC-DC converter

Iqbal

Lee

Jamil

2011

2011 IEEE Conference on Sustainable Utilization and Development in Engineering and Technology (STUDENT)

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The conventional pulse frequency modulated (PFM) zero current switching (ZCS) series resonant (SR) inverter fed dc high voltage power supplies have nearly zero switching loss. However, they have limitations like narrow variation of output voltage and poor control at light load. To alleviate these limitations, this paper proposes a multi-output ZCS-SR inverter fed high voltage dc-dc converter. The SR-inverter in the proposed system has four outputs that are connected to a single transformer linked load via four resonant capacitors each of which have distinct capacitance. Due to distinct values of resonant capacitors, the impedance of tank circuit and hence the power transformer rate is different for four outputs. Thus all the four inverter outputs are fed to load in parallel when maximum load power is desired and a single output that has highest tank circuit impedance is fed to load when lowest load power is required and vice versa. For the four inverter outputs there are sixteen possible combinations to feed them to load in parallel, thus the load power increase from its lowest value to highest in sixteen steps. Switching frequency is adjusted within in its narrow limits to adjust the voltage between two nearest steps. The proposed system has been simulated using PSPICE software. The obtained results show that proposed system has several advantages such as wide range of output voltage control, low output voltage ripple over the entire range and low current stress at light load.

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Inductor snubber-assisted series resonant ZCS-PFM high frequency inverter link DC-DC converter with voltage multiplier

Cited by 34 publications

References 2 publications

Combined resonant tank capacitance and pulse frequency modulation control for ZCS-SR inverter-fed high voltage DC power supply

Combined resonant tank capacitance and pulse frequency modulation control for ZCS-SR inverter-fed high voltage DC power supply

Series resonant high‐voltage DC–DC converter with reduced component count

Multi-output ZCS-SR inverter fed high voltage DC-DC converter

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