Active Power Factor Correction (PFC) Circuit With Resistor-Free Zero-Current Detection

Roh, Yong-Seong; Moon, Young‐Jin; Gong, Jung-Chul; Yoo, Changsik

doi:10.1109/tpel.2010.2070080

Cited by 51 publications

(18 citation statements)

References 14 publications

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“…Approaches such as [6], [7] eliminate the voltage sensor in the input or output voltage, [8] uses the diode current as a variable to compute the duty cycle, and [9] and [10] avoid the use of an ADC chip in the current acquisition, but a current sensor is used. In [11], the current sensor is avoided to detect zero current in a critical mode (CRM) Boost converter.…”

Section: Introductionmentioning

confidence: 99%

Universal Digital Controller for Boost CCM Power Factor Correction Stages Based on Current Rebuilding Concept

López

Azcondo

Castro

et al. 2014

IEEE Trans. Power Electron.

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Section: Introductionmentioning

confidence: 99%

Universal Digital Controller for Boost CCM Power Factor Correction Stages Based on Current Rebuilding Concept

López

Azcondo

Castro

et al. 2014

IEEE Trans. Power Electron.

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“…The three typical variables are measured, but using comparators and saw-tooth signals, avoiding ADCs. In [6], the variable which is not measured is the input voltage, but most works focus on obtaining PFC without measuring the input current [7]- [14]. For instance, in [7] a PFC boost converter is presented.…”

Section: Introductionmentioning

confidence: 99%

“…In [6], the variable which is not measured is the input voltage, but most works focus on obtaining PFC without measuring the input current [7]- [14]. For instance, in [7] a PFC boost converter is presented. In that proposal, the input current is not measured but its zero crossing is detected measuring the input and output voltages.…”

Section: Introductionmentioning

confidence: 99%

Single ADC Digital PFC Controller Using Precalculated Duty Cycles

Sanchez

Castro

López

et al. 2014

IEEE Trans. Power Electron.

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Abstract-Traditional digital PFC (Power Factor Correction) uses three sensors to measure the input and output voltages and the input current. Each sensor, especially the input current one, increases the cost of the system and generates power losses in case of resistive sensors. This paper presents a controller for boost PFC converters. It uses pre-calculated duty cycles generated offline, and applies them to the switch. In order to control the converter with non-nominal conditions, just one ADC (Analog to Digital Converter) is used, which measures the output voltage. Measuring the average and the ripple of the output voltage with this ADC, the controller takes compensation action for changes in the input voltage but also in the load of the converter. The average value is used to control the input voltage changes, whilst the ripple value is used to control load changes. These two loops present low frequency bandwidth, so the ADC and the whole system can be low cost. Finally, a comparator is used to detect the zero-crossing of the input voltage, so the pre-calculated values are synchronized with the ac mains. In this way, the converter only uses one ADC and one comparator, both with low bandwidth. Results show that high power factor and normative compliance are reached, even under non-nominal conditions.

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“…At present, electric vehicle chargers typically use pulse width modulation (PWM) [11] or active power factor correction technology [12] to suppress the harmonics from the charging infrastructure. In earlier charging stations, which used passive power factor correction rectifiers [13][14][15], it was difficult to reduce the harmonics from the charger.…”

Section: Introductionmentioning

confidence: 99%

Capacity Calculation of Shunt Active Power Filters for Electric Vehicle Charging Stations Based on Harmonic Parameter Estimation and Analytical Modeling

Zhou

Wang

et al. 2014

Energies

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Abstract:The influence of electric vehicle charging stations on power grid harmonics is becoming increasingly significant as their presence continues to grow. This paper studies the operational principles of the charging current in the continuous and discontinuous modes for a three-phase uncontrolled rectification charger with a passive power factor correction link, which is affected by the charging power. A parameter estimation method is proposed for the equivalent circuit of the charger by using the measured characteristic AC (Alternating Current) voltage and current data combined with the charging circuit constraints in the conduction process, and this method is verified using an experimental platform. The sensitivity of the current harmonics to the changes in the parameters is analyzed. An analytical harmonic model of the charging station is created by separating the chargers into groups by type. Then, the harmonic current amplification caused by the shunt active power filter is researched, and the analytical formula for the overload factor is derived to further correct the capacity of the shunt active power filter. Finally, this method is validated through a field test of a charging station.

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Active Power Factor Correction (PFC) Circuit With Resistor-Free Zero-Current Detection

Cited by 51 publications

References 14 publications

Universal Digital Controller for Boost CCM Power Factor Correction Stages Based on Current Rebuilding Concept

Universal Digital Controller for Boost CCM Power Factor Correction Stages Based on Current Rebuilding Concept

Single ADC Digital PFC Controller Using Precalculated Duty Cycles

Capacity Calculation of Shunt Active Power Filters for Electric Vehicle Charging Stations Based on Harmonic Parameter Estimation and Analytical Modeling

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