Fully-digitalized implementation of PFC rectifier in CCM without ADC

Hwu, K. I.; Chen, H. W.; Yau, Y. T.

doi:10.1109/apec.2011.5744785

Cited by 4 publications

(4 citation statements)

References 38 publications

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“…In addition, the iL will be equal to ITR1 when t is equal to TR1, so ITR1 can be derived. Then the (A5) can be derived as (9) and (A6) can be derived as (12). After TD, the energy in Cds will be resonated back to Cin during TR2 interval.…”

Section: Appendixmentioning

confidence: 99%

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Line Current Distortion Compensation for DCM/CRM Boost PFC Converters

Chen

2016

IEEE Trans. Power Electron.

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This paper proposes a line current distortion compensation method, which is a fusion of the conventional variable on-time (VOT) control and the average current mode (ACM) control, for DCM/CRM boost PFC converter with zero current switching (ZCS)/ zero voltage switching (ZVS)/ valley switching (VS)/ switching frequency limitation (SFL) functions. In this paper, the mathematical analyses of the line current distortion for the DCM/CRM boost PFC converter with ZCS/ZVS/VS/SFL functions are also derived to explain the causes of the line current distortion. In order to increase efficiency, the ZVS/VS/SFL functions are needed but the line current will be further distorted. To compensate the distorted line current, the ACM-based VOT (ABVOT) control for the DCM/CRM boost PFC converter is proposed. In addition, the constant-on-time-based noise-immunity S/H method is proposed to replace the multiplier, which is always needed for the conventional ACM-based control. The performance of the proposed ABVOT control with S/H method will be demonstrated by simulation and experiment results.Index terms -power factor correction (PFC), variable on-time (VOT), average current mode (ACM), multiplierless.

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Section: Appendixmentioning

confidence: 99%

“…Usually, the boost converter is commonly used in PFC applications [1]- [9]. For low power applications, the discontinuous conduction mode (DCM) and critical mode (CRM) operations are commonly used because of their zero current switching (ZCS) characteristic and easy implementation [10]- [20].…”

Section: Introductionmentioning

confidence: 99%

Line Current Distortion Compensation for DCM/CRM Boost PFC Converters

Chen

2016

IEEE Trans. Power Electron.

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“…However, the use of current sensors can be avoided if an appropriate modulation strategy is adopted [15][16][17][18]. Among the advantages of such a modulation strategy is shorter A/D conversion time and shorter overall calculation time [19,20]. Three-phase ac-dc power converter configurations that use various switching techniques to improve power quality have been reviewed by [21,22].…”

Section: Introductionmentioning

confidence: 99%

DSP-Based Modified SPWM Switching Technique with Two-Degrees-of-Freedom Voltage Control for Three-Phase AC–DC Buck Converter

2014

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This paper presents a modified sinusoidal pulsewidth modulation (SPWM) switching technique in threephase ac-dc buck converter with new modulation strategy. The modulation strategy used two reference signals (0 • -60 • and 120 • -180 • sine wave) and one type of carrier signal, instead of two types of carrier signal to generate pulse-width modulation signals. A conventional 6-switch three-phase acdc buck converter is extended by comprising four diodes in each switch to achieve bidirectional power flow capability. A digital feedback voltage control using two-degreesof-freedom-control approach is implemented to achieve the output voltage to equal the reference voltage with high dynamic performance and to obtain sinusoidal ac current with unity power factor. The modified SPWM switching strategy of ac-dc power flow and vice versa is discussed and verified via mathematical model. The validity of the proposed three-phase ac-dc buck converter with bidirectional A. Alias

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“…Also, the supply current may be distorted and there is a phase difference in the input voltage. In [20], PFC-based on Kalman filters for current sensorless controller was presented. However, it has large computation modeling and the input current has some distortion.…”

Section: Introductionmentioning

confidence: 99%

PFC Control for LED Lamp Driver Using Sensorless Predictive Current Controller

Zaky

Azazi

Touti

2018

Eng. Technol. Appl. Sci. Res.

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Light-emitting diodes (LEDs) have recently become of utmost significance to replace conventional lighting sources. Power factor correction (PFC) control of LED lamps requires three sensors which cause more cost, increase time delay, and increase noise, thus reducing drive reliability. Alternative methods to estimate the inductor current instead of its measurement are mandatory. This paper proposes a sensorless predictive current controller to enhance power factor (PF) of LED lamp driver and reduce driver cost. The inductor current is estimated instead of employing current sensor relying on measured input and output voltages. Zero-crossing detector is utilized to accomplish robust performance during distorted supply voltage. The controller and power circuit are isolated. The control algorithm employs a two-loop control to achieve a high PF with sinusoidal input current. Rapid speed performance is accomplished. The influences of PFC on input current value, PF and harmonic orders are presented. A prototype LED lamp driver with the suggested PFC structure is tested practically by a digital signal processor (DSP) DS1104 platform to validate its effectiveness. Experimental tests under various working conditions are provided to prove the usefulness of the suggested PFC control.

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Fully-digitalized implementation of PFC rectifier in CCM without ADC

Cited by 4 publications

References 38 publications

Line Current Distortion Compensation for DCM/CRM Boost PFC Converters

Line Current Distortion Compensation for DCM/CRM Boost PFC Converters

DSP-Based Modified SPWM Switching Technique with Two-Degrees-of-Freedom Voltage Control for Three-Phase AC–DC Buck Converter

PFC Control for LED Lamp Driver Using Sensorless Predictive Current Controller

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