Switching-Frequency Control for Regulated Discontinuous-Conduction-Mode Boost Rectifiers

Lo, Yu‐Kang; Lin, Jing‐Yuan; Ou, Sheng-Yuan

doi:10.1109/tie.2007.892104

Cited by 39 publications

(14 citation statements)

References 7 publications

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“…Therefore, the inductance value, L boost must be chosen carefully to keep the boost converter of the PV system in discontinuous conduction mode (DCM) in all the operating regions from light load to full load [27][28]. From Eq.…”

Section: Design Considerationmentioning

confidence: 99%

Independent MPPTracking Method of Hybrid Solar-Wind Power Conditioning Systems Using Integrated Dual-Input Single-PWM-Cell Converter Topology

Thenathayalan¹,

Ahmed²,

Choi³

et al. 2017

Journal of Electrical Engineering and Technology

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-This paper proposes the modeling and control strategy to track the MPPs of hybrid PV and Wind power systems, using a new dual input boost converter. The dual input power conditioning system with an independent MPPT control scheme is introduced with minimum number of circuit elements in order to reduce the switching loss, size and cost of the system. Since the operating conditions for the PV and Wind power systems are very distinct from each other, an efficient and superior control system is required to track the MPPs of both renewable sources with the use of a simply-structured single-ended single-inductor converter. The design of Power-Conditioning System (PCS) and detail control strategy are presented in this paper. To provide independent tracking of MPPs, a variable duty-cycle control strategy is employed for the wind system and a variable frequency strategy is employed for the PV system. Finally, the proposed dual-input converter for hybrid power conditioning system is implemented and the hardware test results are presented. From the hardware experiment, it is concluded that the proposed system successfully tracks the MPPs of both of the renewable power systems independently.

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Section: Design Considerationmentioning

confidence: 99%

Independent MPPTracking Method of Hybrid Solar-Wind Power Conditioning Systems Using Integrated Dual-Input Single-PWM-Cell Converter Topology

Thenathayalan¹,

Ahmed²,

Choi³

et al. 2017

Journal of Electrical Engineering and Technology

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“…1 are illustrated in this section. The conventional variable-frequency control method can be seen in [7], wherein the duty pattern is depicted in Fig. 2.…”

Section: Controlmentioning

confidence: 99%

“…In addition, a DCM variable-frequency control method is presented in [7], wherein the switching frequency is inversely proportional to load current and the duty pattern is defined to one minus the proportion of the absolute instantaneous source voltage to the output voltage, that is,…”

Section: Introductionmentioning

confidence: 99%

Implementation of a half-bridge single-stage converter control using DSP

Tien

Tsai

2009

2009 International Conference on Power Electronics and Drive Systems (PEDS)

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A novel control method used in the half-bridge single-state power converter is presented in this paper. This proposed control scheme is to enlarge load regulation range in discontinuous conduction mode (DCM), while the new duty pattern will be derived to perform the variable-frequency control. Compared to the conventional control methods, the proposed duty cycle pattern within a switching period is directly proportional to the absolute value of instantaneous source voltage and the output can be regulated by varying the switching frequency using digital signal processor (DSP) control wherein TMS320F2812 manufactured by TI is utilized. Compared to conventional control methods, the proposed is simpler to upgrade the power factor and efficiency. Experimental results show good conformation with the theoretical analysis.

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“…Recently, a number of duty cycle modulation techniques for the DCM boost rectifier have been introduced to reduce the Total Harmonic Distortion (THD) of the input current for single-phase and threephase systems [3][4][5][6][7][8] . Specifically, the approach based on variable switching frequency control was presented and analyzed in [7,8] . However, since the switching frequency directly depends on the input voltage and output power variations, the variable switching frequency method suffers from very wide frequency range which decreases the efficiency and makes the rectifier design and control circuit more complex.…”

Section: Fig 1: Active Pfc Techniquementioning

confidence: 99%

Control Strategy for Discontinuous Conduction Mode Boost Rectifier with Low Total Harmonic Distortion and Improved Dynamic Response

Athab¹

2008

American J. of Engineering and Applied Sciences

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Due to its simplicity, the discontinuous conduction mode boost rectifier is potentially the least expensive active line-harmonics reducing circuit. Problem statement: The line current however, shows considerable distortion when the peak input voltage is close to the output voltage, As a result, the input power factor is poor. This study proposes a simple, low-cost method to reduce the line harmonics. Approach: A periodic voltage signal was injected in the control circuit to vary the duty cycle of the boost switch within a line cycle so that the third-order harmonic of the input current is reduced and the THD is improved. The proposed technique eliminates the additional harmonic generator, phase detecting and phase-locking circuits, which was proposed in the literature. Instead we can utilize the bridge rectifier's output voltage of the boost converter to modulate the duty cycle of the boost switch. As a result, the injected signal is naturally synchronized with line current. In addition, to obtain nearly constant harmonic content over a wide range of load variation, a modulation index m is used to update the injected signal with a fraction of duty cycle which reflects the load changes. Results:The results proved that third-order harmonic, which was the Lowest Order Harmonic (LOH), can be attenuated by adjusting the modulation index of the injected signal. Moreover, the rectifier shows a good transient performance where the converter's output voltage overshoots during load and input voltage transients is reduced. Conclusions/Recommendations: The proposed circuit can be used as a front-end converter for DC/DC or DC/AC converters in order to improve the power factor of the input current. Also the proposed control circuit could be integrated in a single chip in order to reduce the cost of the industrial implementation.

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Switching-Frequency Control for Regulated Discontinuous-Conduction-Mode Boost Rectifiers

Cited by 39 publications

References 7 publications

Independent MPPTracking Method of Hybrid Solar-Wind Power Conditioning Systems Using Integrated Dual-Input Single-PWM-Cell Converter Topology

Independent MPPTracking Method of Hybrid Solar-Wind Power Conditioning Systems Using Integrated Dual-Input Single-PWM-Cell Converter Topology

Implementation of a half-bridge single-stage converter control using DSP

Control Strategy for Discontinuous Conduction Mode Boost Rectifier with Low Total Harmonic Distortion and Improved Dynamic Response

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