Improving the dynamic response of power factor correctors using simple digital filters: Moving average filter comparative evaluation

Forbes, Jason; Ordonez, Martin; Anun, Matias

doi:10.1109/ecce.2013.6647348

Cited by 17 publications

(6 citation statements)

References 11 publications

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“…Accurate digital design of filter required moving average algorithm [18,19] One subtraction, one addition, one division, shifting operation at every computation point. Forbes et al [19] also require integration 1. More arithmetic operations than the proposed algorithm 2.…”

Section: Proposed Algorithmmentioning

confidence: 99%

“…A comparison of the features and digital implementation aspects between the proposed algorithm and the control algorithms/ schemes presented in the literature [3,4,13,14,[16][17][18][19] for removing the double-line frequency component in the voltage loop (to achieve fast dynamic response without affecting current quality) is given in Table 3. The proposed algorithm is computationally less intensive and puts minimal additional computation burden in digital implementations alongside linear/non-linear/predictive current controllers for any single-phase PFC topology.…”

Section: Digital Implementation Aspects Of the Proposed Algorithmmentioning

confidence: 99%

“…Control methods are proposed in [3,4,[13][14][15][16][17][18][19][20][21][22][23][24][25] to nullify the effects of the double-line frequency ripple component. Load current feedforward based control techniques for dynamic performance improvement are employed in [13,14] where the load current is sensed and given as a feedforward to the control loop.…”

Section: Introductionmentioning

confidence: 99%

“…However, the comb filter implementation complexity increases if higher order multiples of the ripple frequency are to be eliminated. Moving average filters (MAFs) are proposed in [18, 19] for boost PFC converters. In [18], an FPGA‐based MAF is used where, the output voltage waveform is integrated over a fixed interval and the result of integration is passed on to a running average computation.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Simple digital algorithm for improved performance in a boost PFC converter operating in CCM

Nair¹,

Narasamma²

2019

IET Power Electronics

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In power factor correction (PFC) converters, achieving both good steady-state input current waveform and fast output dynamic response is a challenge. This is due to the effect of the double-line frequency ripple present in the sensed output voltage signal which tends to distort the reference current applied to the current controller, thus leading to a distorted input current waveform. Low bandwidth (BW) voltage loop designs to reduce this input current distortion make the output dynamic response very sluggish. A digital control algorithm for the estimation of the average value of the sensed output voltage is proposed in this study to achieve low total harmonic distortion input current and fast dynamic response with a higher BW voltage loop. The proposed algorithm is computationally less intensive and requires no additional sensors or circuitry. The effectiveness of the proposed control algorithm is validated through simulation and experimental tests on a 300 W boost PFC converter prototype operating in continuous conduction mode.

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Section: Proposed Algorithmmentioning

confidence: 99%

Section: Digital Implementation Aspects Of the Proposed Algorithmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Simple digital algorithm for improved performance in a boost PFC converter operating in CCM

Nair¹,

Narasamma²

2019

IET Power Electronics

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“…The main challenge is that, in order to have a strong attenuation at the double-line frequency, the quality factor of the notch filter should be high and the center frequency must be accurately tuned. Recently, more advanced solutions such as self-tuning comb filter [15] and MAF filter [16] having multiple notch frequencies were proposed to cope with the presence of higher harmonic components and variations in line frequency. In general, high-quality notch filters are not easily realizable using digital controllers are typically used for their implementation [17].…”

Section: Introductionmentioning

confidence: 99%

Unity-Power-Factor Control Based on Precise Ripple Cancellation for Fast-Response PFC Preregulator

Leung

Loo

Lai

2016

IEEE Trans. Power Electron.

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Power-factor pre-regulators are commonly used in electronic equipments for minimizing the injection of current harmonics into the mains power line. However, the bandwidth of conventional pre-regulators are usually configured to be very small in order to achieve near-unity power factor, and this inevitably gives rise to poor dynamic response. Ripple estimation/cancellation method is used to eliminate the double-line frequency component from the sampled output voltage before it propagates into the voltage control loop, hence the requirement of small bandwidth is not mandatory. The existing ripple estimation circuits, however, are only accurate under specific conditions, beyond which power factor will be degraded. In view of this, a new ripple estimation/cancellation network consisting of an amplitude tuner and a phase shifter based on switchedresistor circuits is proposed and verified experimentally on a 200-W boost power-factor pre-regulator. It is shown that the proposed ripple estimation network not only provides accurate ripple estimation over a wide range of operating conditions, it also gives a way to decouple the power factor of a pre-regulator from its controller bandwidth. With the aid of the proposed ripple estimation network, the desired features of fast dynamic response and unity power factor are both achieved. Index TermsPower-factor correction, fast response, ripple cancellation, unity power factor, low-frequency ripple, switchedresistor. 0885-8993 (c) dynamic response of the pre-regulator. Hence, it can be concluded that there is a trade-off between the power factor and the dynamic performance of a PFC pre-regulator. 0885-8993 (c)

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Multidimensional harmonic current feedforward compensation control of single‐phase alternating current–direct current power factor correction converter

Huang

et al. 2021

Circuit Theory & Apps

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Generally, low‐bandwidth condition of control voltage loop is used for single‐phase alternating current–direct current (AC–DC) power factor correction (PFC) converter, which eliminates the influence of the second harmonic component in the output voltage on control loop but degrades the load dynamic performance. However, the high‐bandwidth condition of voltage loop would cause multiharmonic distortions both in the input current and output voltage. Regarding this issue, this paper proposes a multidimensional harmonic current feedforward compensation control (MHCFC) scheme, to eliminate multiharmonic distortion of the PFC system using a high‐bandwidth condition of voltage loop and improve the dynamic performance as well. In the proposed scheme, the odd harmonics of the input current are extracted through multidimensional band‐pass filters and further converted into even harmonic compensation signals via the coordinate transformation, so as to offset the negative effects of the even harmonics of the output voltage. Taking boost PFC circuit as an example, a digital controlled experimental prototype is built to verify the feasibility of the proposed control scheme. The experimental results show that, compared with the traditional low‐pass filter (LPF) scheme, the proposed scheme guarantees a high‐quality input current while its load dynamic response is improved by about 70%.

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Improving the dynamic response of power factor correctors using simple digital filters: Moving average filter comparative evaluation

Cited by 17 publications

References 11 publications

Simple digital algorithm for improved performance in a boost PFC converter operating in CCM

Simple digital algorithm for improved performance in a boost PFC converter operating in CCM

Unity-Power-Factor Control Based on Precise Ripple Cancellation for Fast-Response PFC Preregulator

Multidimensional harmonic current feedforward compensation control of single‐phase alternating current–direct current power factor correction converter

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