Power Supply for a High-Voltage Application

Martín-Ramos, J.A.; Pernia, A.M.; Díaz, Juan José del Coz; Nuño, F.; Martinez, J.A.

doi:10.1109/tpel.2008.925153

Cited by 153 publications

(51 citation statements)

References 17 publications

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“…The price to pay for this simplification in the assembly is a more complicated performance of the topology, since the use of a purely capacitive filter results in discontinuousconduction-mode operation. Nevertheless, this is not much of a problem, for the behavior of this topology has already been described and developed by means of different mathematical models for a half-bridge [20,24] where several topologies are compared, for a PRC-LCC topology [21,23,25,26]; for high voltage pulse loads [22] and full bridge Zero Current Switching Pulse Wide Modulation (ZCS PWM) application in [27]. Other models have been developed in [28][29][30][31] for LCC-type parallel resonant converter.…”

Section: Power Stagementioning

confidence: 99%

“…On the other side, after assembling the power supply, the values for all the circuit components (r, LS, CS, CP, and R) are known [25,33]. The equivalent load of the converter, R, is derived from the output voltage and output power specifications, and its value is typically considered to be constant.…”

Section: Large-signal Model and Steady-state Conditionmentioning

confidence: 99%

“…There is one model, however, that succeeds in describing the full performance of the topology throughout its continuous conduction mode using a single set of equations [25,33]. This model can be used for large-signal, small-signal and steady-state analysis.…”

Section: Large-signal Model and Steady-state Conditionmentioning

confidence: 99%

“…Figure 3. Equivalent circuit of the topology according to [25,33]. Waveforms are expressed as amplitudes.…”

Section: Large-signal Model and Steady-state Conditionmentioning

confidence: 99%

“…Transfer function, G(s), has been obtained by modifying the small-signal model of the topology presented in [25] so as to include the control strategy in the mathematical equations. This strategy sets a constant switching frequency so that the resonant current is centered with respect to the inverter voltage, Figure 8.…”

Section: Small Signal Modelmentioning

confidence: 99%

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A Digitally Controlled Power Converter for an Electrostatic Precipitator

et al. 2017

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Electrostatic precipitators (ESPs) are devices used in industry to eliminate polluting particles in gases. In order to supply them, an interface must be included between the three-phase main line and the required high DC voltage of tens of kilovolts. This paper describes an 80-kW power supply for such an application. Its structure is based on the series parallel resonant converter with a capacitor as output filter (PRC-LCC), which can adequately cope with the parasitic elements of the step-up transformer involved. The physical implementation of the prototype includes the use of silicon carbide-SiC-semiconductors, which provide better switching capabilities than their traditional silicon-Si-counterparts. As a result, a new control strategy results as a better alternative in which the resonant current is maintained in phase with the first harmonic of the inverter voltage. Although this operation mode imposes hard switching in one of the inverter legs, it minimizes the reactive energy that circulates through the resonant tank, the resonant current amplitude itself and the switching losses. Overall efficiency of the converter benefits from this. These ideas are supported mathematically using the steady state and dynamic models of the topology. They are confirmed with experimental measurements that include waveforms, Bode plots and thermal behavior. The experimental setup delivers 80 kW with an estimated efficiency of 98%.

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Section: Power Stagementioning

confidence: 99%

Section: Large-signal Model and Steady-state Conditionmentioning

confidence: 99%

Section: Large-signal Model and Steady-state Conditionmentioning

confidence: 99%

“…Figure 3. Equivalent circuit of the topology according to [25,33]. Waveforms are expressed as amplitudes.…”

Section: Large-signal Model and Steady-state Conditionmentioning

confidence: 99%

Section: Small Signal Modelmentioning

confidence: 99%

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A Digitally Controlled Power Converter for an Electrostatic Precipitator

et al. 2017

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LLC resonant DC–DC converter with series‐connected primary windings of transformer

Iqbal

Shahzad

2014

IEEJ Transactions Elec Engng

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This paper proposes a zero‐voltage switching (ZVS) LLC resonant step up DC–DC converter with series‐connected primary windings of the transformer. The series resonant inverter in the proposed topology has two power switches (MOSFETs), two resonant capacitors, two resonant inductors, and only one transformer with center‐tapped primary windings. The power switches are connected in the form of a half‐bridge network. Resonant capacitors and inductors along with the primary windings of the transformer form two series resonant circuits. The series resonant circuits are fed alternately by operating the power switches with an interleaved half switching cycle. The secondary winding of transformer is connected to a bridge rectifier circuit to rectify the output voltage. The converter operates within a narrow frequency range below the resonance frequency to achieve ZVS, and its output power is regulated by pulse frequency modulation. The converter has lower conduction and switching losses and therefore higher efficiency. The experimental results of a 500‐W prototype of proposed converter are presented. The results confirm the good operation and performance of the converter. © 2014 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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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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Power Supply for a High-Voltage Application

Cited by 153 publications

References 17 publications

A Digitally Controlled Power Converter for an Electrostatic Precipitator

A Digitally Controlled Power Converter for an Electrostatic Precipitator

LLC resonant DC–DC converter with series‐connected primary windings of transformer

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

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