A CCM/DCM Hybrid Control Scheme for Single Channel Boost PFC Converter to Improve Power Quality

To reduce total harmonic distortion (THD) and improve the power factor (PF) of a boost power factor correction (PFC) converter, here, the authors propose a non‐linear control algorithm that includes the feedforward correction (FC) algorithm in the continuous conduction mode (CCM) and the non‐linear frequency variation (FV) algorithm in the mixed conduction mode (MCM). The proposed FC algorithm achieves current out of distortion through zero crossing with a lower current loop bandwidth. The proposed non‐linear FV algorithm achieves high PF and low THD under minimal load conditions. The non‐linear FV algorithm comprises a third harmonic extraction algorithm, a harmonic control loop for reducing THD and a frequency production algorithm. By using this non‐linear FV algorithm, the inductor size is reduced, which leads to lower cost and also achieves better THD and PF. The proposed algorithms are verified experimentally in terms of current tracking, current THD, PF, heating and loss on a 2000‐W boost PFC converter hardware prototype.

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“…Ref. [27] proposed a digital hybrid control scheme which includes the sampling correction. But the sampling correction is a little complicated.…”

Section: Introductionmentioning

confidence: 99%

Non‐linear control of a boost PFC converter with a small inductor based on feedforward correction and frequency variation

Song

Liu

Yang

et al. 2022

IET Power Electronics

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“…Power factor correction (PFC) converters, as the connection unit between power grid and power load, are responsible for obtaining unity power factor (PF), lowering total harmonic distortion (THD) of the line current and providing stable dc power supplies for the load. At present, single-phase PFC converters have been mandatorily applied in electric vehicles, 1 micro-grid, 2 hybrid buildings, 3 and other fields, 4,5 so as to comply with international harmonic standards and grid rules. Thanks to the merits of small input current ripple and low conduction loss, boost PFC topology operating in the continuous conduction mode (CCM) is the most common circuit in medium and high-power applications.…”

Section: Introductionmentioning

confidence: 99%

Cascaded model‐free predictive control for single‐phase boost power factor correction converters

Zhang

et al. 2021

Intl J Robust & Nonlinear

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Conventionally, the dual-loop PI controllers are designed for the single-phase boost power factor correction (PFC) converters operating under continuous conduction mode (CCM), which is not available to perform rapid adaptations to plant uncertainties caused by the different operation modes and the parameter variations. In order to improve the control performance and robustness, a cascaded model-free predictive control (MFPC) scheme is proposed based on the unified ultra-local model under CCM and discontinuous conduction mode (DCM) for the single-phase boost power factor correctors. Different from the traditional sluggish PI controllers, the proposed control law is adaptive to the operation mode and sudden variations with the algebraic identification technique, thus providing high-quality line current and fast dynamic characteristic for the full power operating range. Comparative simulations and experiments with PI control scheme are provided to certificate the effectiveness of the proposed control scheme.

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Control and Design of a Boost-Based Electrolytic Capacitor-Less Single-Phase-Input Drive

2022

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Adjustable-speed drives with single-phase input require a power factor correction front-end, usually implemented by a boost converter, to reduce the current distortion from the uncontrolled rectifier; this stage is then followed by a three-phase inverter. Bulky electrolytic capacitors are used to limit the direct current voltage ripple resulting from the rectification of the single-phase input. This leads to increased system size and shorter lifetime. In this work, the usual boost front-end is exploited to actively control the DC link voltage ripple while limiting the input current distortion and, hence, the power factor, even if not reaching unity. However, Power Factor is greatly improved with respect to the uncontrolled rectifier alone. This approach permits one to reduce the required capacitance, allowing the substitution of the electrolytic capacitor with a long-life low-equivalent-series-resistance film one. A control targeting capacitor voltage level, ripple, and boost inductor peak current is presented, together with practical design models. The synergic control of the boost front-end and of the machine drive is presented as well. The resulting converter is tested with resistive load and permanent-magnet synchronous machine drive, highlighting the advantages and limits of the proposed solution.

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A CCM/DCM Hybrid Control Scheme for Single Channel Boost PFC Converter to Improve Power Quality

Cited by 3 publications

References 13 publications

Non‐linear control of a boost PFC converter with a small inductor based on feedforward correction and frequency variation

Non‐linear control of a boost PFC converter with a small inductor based on feedforward correction and frequency variation

Cascaded model‐free predictive control for single‐phase boost power factor correction converters

Control and Design of a Boost-Based Electrolytic Capacitor-Less Single-Phase-Input Drive

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