Two-Switch Forward Converter With Reset Winding and an Auxiliary Active-Clamp Circuit for a Wide Input Voltage Range

Jang, Paul; Cho, Bo-Hyung

doi:10.1109/tpel.2016.2599268

Cited by 29 publications

(17 citation statements)

References 26 publications

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“…Increase the voltage gain of the converter according to Equation (21). As a result, the transformer round ratio decreases.…”

Section: Increment Of the Voltage Gainmentioning

confidence: 99%

“…), V oT is the voltage of the secondary coil of the power transformer. The voltage gain of the DC/DC converter of the MDC is calculated by Equation(21). Also, the voltage stress of diodes D O1 and D O2 is expressed by Equation (22).…”

mentioning

confidence: 99%

“…Also, the voltage stress of diodes D O1 and D O2 is expressed by Equation (22). In Equations(21) and (22), M Vdc is the converter voltage gain and V PIVD maximum reverse voltage of the output diodes.…”

mentioning

confidence: 99%

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A new magnetron driving method using a phase‐shifted active clamp forward converter for sulfur plasma tube applications

Nasiri

Banaei

2020

IET Power Electronics

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This paper presents a new method for driving the magnetron for a sulfur plasma tube using the two-switch forward converter structure with a phase-shifting active clamp (1000±40 W, 285 mA, 4 kV). Depending on the output voltage level required, the magnetron driver circuit is boosted and insulated and also has high gain. The use of the two-switch forward converter reduces the transistor voltage stress. In addition, applying the clamp structure balances the magnetization current. Besides, by controlling the phase shift of the clamp transistor, while maintaining the magnetic current balance of the power transformer, the duty cycle of the main transistors can be increased. This allows more voltage level transfer to the secondary winding of the transformer. Therefore, with a fixed transformer core, more voltage transmission is possible in comparison with a conventional forward converter. Moreover, using the PFC converter improves the power factor and stabilizes the DC-link voltage. The magnetron driver circuit provides a maximum power of 1 kW with an average power of 125-250 W by adjusting the converter's active time under minimum loss conditions. The magnetron driver circuit provided is validated by the simulation and experimental results. How to cite this article: Nasiri A, Banaei MR. A new magnetron driving method using a phase-shifted active clamp forward converter for sulfur plasma tube applications.

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“…Increase the voltage gain of the converter according to Equation (21). As a result, the transformer round ratio decreases.…”

Section: Increment Of the Voltage Gainmentioning

confidence: 99%

mentioning

confidence: 99%

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A new magnetron driving method using a phase‐shifted active clamp forward converter for sulfur plasma tube applications

Nasiri

Banaei

2020

IET Power Electronics

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“…However, the drawbacks of LLC converters are wider‐switching frequency, higher‐circulating current, lower magnetising inductance, and higher ripple current on output capacitor. Asymmetric HB converters [12, 13] can reach zero‐voltage switching within the partial load range. However, the efficiency of asymmetric HB converter at low load is poor, there is a DC current on primary windings of transformer, and DC current and voltage ratings on rectifier didoes are unbalanced.…”

Section: Introductionmentioning

confidence: 99%

Low‐primary current and wide hold‐up time DC–DC converter: analysis and implementation

Lin

2018

IET Power Electronics

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A soft-switching direct current (DC) to DC converter is studied in this study to achieve benefits: (i) low-primary current (circulating current) loss, (ii) low-switching loss, (iii) low-output filter inductance, and (iv) wide holdup time. On primary side of the studied converter, a phase-shift pulse-width modulation full-bridge (FB) circuit and a half-bridge (HB) circuit using same lagging-leg switches of FB circuit to reduce the switching losses at light load. Resonant capacitor is adopted on primary side of FB circuit to lessen primary current at freewheeling state so as to reduce conduction losses. The output sides of HB and FB circuits are series connection to create two positive voltages instead of one positive voltage on conventional FB circuit so as to reduce primary current and output filter inductance. To extend holdup time and avoid using large size of input capacitor when utility power is off, the auxiliary windings are used on secondary side to achieve higher-voltage gain. To verify the performance and effectiveness of the studied converter, the operational principle and equivalent circuits are explained and analysed in detail and a 1440 W prototype is constructed and tested for 300-400 V input and 48 V output applications.

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“…Therefore, it cannot be used for medical applications that need to have low volume and low EMI converters. In [2][3][4][5], some techniques are presented to achieve soft switching conditions for PWM-TSFC.…”

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confidence: 99%

Regenerative‐passive snubber two‐switch forward converter

Soltanzadeh

Yousefi

2018

Electron. lett.

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A regenerative-passive snubber (RPS) for pulse-width modulation (PWM) two-switch forward converter (TSFC) is presented. The RPS circuit is recycled the magnetic energy stored in the transformer leakage inductor and is achieved zero voltage switching turn off of power switches. Moreover, the RPS provides the resonant path formed by snubber capacitors and the snubber inductor to achieve zero current switching (ZCS) turn on of switches. In addition, the output diodes turn on/off under ZCS. The proposed RPS-PWM TSFC is analysed and experimental result for a 160 W, 300 kH prototype at the output voltage of 32 V are obtained to verify the theoretical analysis.

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Two-Switch Forward Converter With Reset Winding and an Auxiliary Active-Clamp Circuit for a Wide Input Voltage Range

Cited by 29 publications

References 26 publications

A new magnetron driving method using a phase‐shifted active clamp forward converter for sulfur plasma tube applications

A new magnetron driving method using a phase‐shifted active clamp forward converter for sulfur plasma tube applications

Low‐primary current and wide hold‐up time DC–DC converter: analysis and implementation

Regenerative‐passive snubber two‐switch forward converter

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