An adaptive digital controller for a unity power factor converter

Mitwalli, A.H.; Leeb, Steven B.; Verghese, George C.; Thottuvelil, V.J.

doi:10.1109/63.486188

Cited by 96 publications

(51 citation statements)

References 4 publications

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“…with the equivalent input conductance G e . This commonly employed current control scheme is extended with a dutyratio feedforward path implementing (12). The output of the feedforward path d ff is multiplied with a constant K that is allowed to be either 0 or 1, corresponding to the current-loop controller without or with duty-ratio feedforward, respectively.…”

Section: A the Current Controller Using Duty-ratio Feedforwardmentioning

confidence: 99%

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Duty-Ratio Feedforward for Digitally Controlled Boost PFC Converters

Sype

Gusseme

Bossche

et al. 2005

IEEE Trans. Ind. Electron.

155

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Abstract-When a 'classical' current control scheme is applied, the input current of a boost power factor correction (PFC) converter leads the input voltage, resulting in a nonunity fundamental displacement factor and in important zerocrossing distortion in applications with a high grid frequency (e.g. 400Hz power systems on commercial aircraft). To resolve this problem, a current-control scheme is proposed using duty-ratio feedforward. In this paper, the input impedance of the boost PFC converter for both the classical current-loop controller and the controller using duty-ratio feedforward are derived theoretically. A comparison reveals the advantages of the proposed control scheme: a low total-harmonic-distortion (THD) of the input current, a resistive input impedance, virtually no zero-crossing distortion and a fundamental displacement power factor close to unity. The theoretical results obtained are verified using an experimental setup of a digitally controlled boost PFC converter.

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Section: A the Current Controller Using Duty-ratio Feedforwardmentioning

confidence: 99%

“…To calculate the input impedance of the boost PFC converter with a feedforward current control loop, linearization is required. Using capitals for steady-state values and hatted small letters for small excursions from steady-state, the linearized version of the non-linear feedforward path (12) becomes…”

Section: B the Input Impedancementioning

confidence: 99%

Duty-Ratio Feedforward for Digitally Controlled Boost PFC Converters

Sype

Gusseme

Bossche

et al. 2005

IEEE Trans. Ind. Electron.

155

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show abstract

“…Due to the adoption of IEC 1000-3-2 [4] as the EN61000-3-2 standard in Europe and the formulation of the IEEE 519 [5] in USA, these circuits are increasingly being used in the front-end of electronic equipments. Among the several possible topologies [2], the boost PFC shown in Fig. 1 is most commonly used.…”

Section: Introductionmentioning

confidence: 99%

“…Often, the PFC acts as a pre-regulator to a DC-DC converter that may be used to provide additional regulation and ohmic isolation [2,3]. Due to the adoption of IEC 1000-3-2 [4] as the EN61000-3-2 standard in Europe and the formulation of the IEEE 519 [5] in USA, these circuits are increasingly being used in the front-end of electronic equipments.…”

Section: Introductionmentioning

confidence: 99%

Analysis and design of an isolated single-phase power factor corrector with a fast regulation

Kessal

Rahmani

Gaubert

et al. 2011

Electric Power Systems Research

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“…As a result, no input current controller is required. On the other hand, higher power applications ask for operation in the continuous conduction mode (CCM) [4]- [9], since in DCM the device stresses and the conducted emissions become too high. An input current controller is now required, since the input current does not inherently track the input voltage.…”

Section: Introductionmentioning

confidence: 99%

Input-Current Distortion of CCM Boost PFC Converters Operated in DCM

Gusseme

Sype²,

Bossche

et al. 2007

IEEE Trans. Ind. Electron.

155

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Abstract-Power factor correction (PFC) converters for the higher power range are commonly designed for continuous conduction mode (CCM). Nevertheless, operation in the discontinuous conduction mode (DCM) occurs for light load in a zone, close to the crossover of the line voltage. This zone will gradually expand with decreasing load to finally encompass the entire line cycle. Whereas in CCM the parasitic capacitances of the switches only cause switching losses, in DCM they are a source of converter instability, resulting in significant input current distortion. In this paper, this source of input current distortion is analyzed and a solution is proposed. Experimental results are obtained using a digitally controlled boost PFC converter, designed to operate in CCM for 1kW.

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An adaptive digital controller for a unity power factor converter

Cited by 96 publications

References 4 publications

Duty-Ratio Feedforward for Digitally Controlled Boost PFC Converters

Duty-Ratio Feedforward for Digitally Controlled Boost PFC Converters

Analysis and design of an isolated single-phase power factor corrector with a fast regulation

Input-Current Distortion of CCM Boost PFC Converters Operated in DCM

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