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Journal ArticleDOI

A Computationally Simple Predictive CCM Average Current Controller With Nearly Zero Tracking Error for Boost PFC Converter

01 Sep 2020-IEEE Transactions on Industry Applications (Institute of Electrical and Electronics Engineers (IEEE))-Vol. 56, Iss: 5, pp 5083-5094

TL;DR: A computationally simple predictive continuous conduction mode average current controller based on the concept of moving averages for the boost PFC converter and achieves nearly zero tracking error in the average inductor current is proposed.
Abstract: Predictive current controllers offer superior control action in power factor correction (PFC) converters, however, cause tracking error in the average inductor current due to the unmodeled circuit parameters and variations which could lead to higher harmonic currents, higher input current THD and impact on the output voltage. Attempts to make the predictive current control equations accurate leads to increased computational complexity, thus limiting the switching frequency of operation or increasing the processing requirements. This article proposes a computationally simple predictive continuous conduction mode average current controller based on the concept of moving averages for the boost PFC converter and achieves nearly zero tracking error in the average inductor current. Additionally, a predictive current controller is derived for performance comparison by considering the effect of major converter nonidealities and digital implementation aspects. The performance of the proposed predictive current controller is compared with that of a PI current controller, an ideal predictive current controller and the derived predictive current controller with nonidealities included. Experimental studies on a boost PFC converter hardware prototype validate the effectiveness of the proposed predictive current controller.
Topics: Model predictive control (58%), Control theory (58%), Power factor (53%), Inductor (52%)
Citations
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Journal ArticleDOI
Felipe Villarroel1, Jose Espinoza1, M. Perez2, Roberto O. Ramirez3  +4 moreInstitutions (3)
TL;DR: To solve the problem of the unstable internal dynamic, a short horizon FCS-MPC controller based on input-state linearization is proposed allowing correct operation of the system.
Abstract: Finite Control Set Model Predictive Control (FCS-MPC) is an alternative to conventional linear controllers in power converters due to its attractive properties such as its conceptual simplicity, flexibility, direct consideration of non linearities as well as constraints, and fast control response. This last feature imposes computational constraints and short prediction horizons are therefore needed. In fact, in many applications an horizon one FCS-MPC controller is used. However, using FCS-MPC with a short prediction horizon in topologies that exhibit non-minimum phase behavior such as active-front-end rectifiers, dc-dc boost converters, and Z-source converters, among others, may lead to control issues. This work studies the origin of these control issues using nonlinear control theory considering a dc-dc boost converter as a case study. It is shown that the difficulty to directly control the converter output voltage using short horizon FCS-MPC is the resulting unstable internal dynamic, as the short horizon FCS-MPC controller acts like an input-output linearizing controller. To solve the problem of the unstable internal dynamic, a short horizon FCS-MPC controller based on input-state linearization is proposed allowing correct operation of the system. Experimental results show the feasibility of the proposal.

3 citations


Cites background from "A Computationally Simple Predictive..."

  • ...The predictive average current controller [38], achieves an accurate tracking of the inductor current, but the output voltage loop design is not discussed....

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Proceedings ArticleDOI
16 Dec 2020-
Abstract: The single-phase boost Power Factor Correction (PFC) converter has become an essential front-end converter in most power electronic systems The need to ensure good converter performance under constraints of high power density and low costs has made converter control challenging Deadbeat Predictive Current Control (DPCC) can offer fast control action; however, careful digital implementation is essential to ensure high performance This paper analyses and presents the various control implementation aspects to be considered for DPCC of the single-phase boost PFC converter with the help of analytical, simulation and experimental studies

Journal ArticleDOI
J. Raji1, V. Kamaraj1Institutions (1)
Abstract: The Renewable energy system, electric vehicle, and telecommunication applications require relatively stable power converters with a high gain and enhanced noise immunity A study of three different types of current-mode controllers for high-gain ultra-lift Luo-converter (ULC) is discussed in this paper The stability of a constant frequency peak current-mode controller (PCM), an average current-mode controller (ACM) and a variable frequency hysteresis current-mode controller (HCM) are analyzed based on small-signal characteristics Using mathematical modeling of the controllers, the closed-loop transfer functions such as control voltage to output voltage, current loop gain, inductor current to control voltage, and audio susceptibility are obtained These transfer functions along with MATLAB simulation results for PCM, ACM and HCM controllers are compared Then, the component losses of the ULC converter using PCM, ACM and HCM controllers are calculated and an efficiency comparison of different control techniques is done Investigations of the voltage and current stresses of the switch and diodes are also carried out Finally, a prototype is fabricated to validate the performance of the converter

References
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Journal ArticleDOI
Abstract: This paper explores predictive digital current programmed control for valley, peak or average current. The control laws are derived for the three basic converters: buck, boost, and buck-boost. It is found that for each variable of interest (valley, peak or average current) there is a choice of the appropriate pulse-width modulation method to achieve predictive digital current control without oscillation problems. The proposed digital control techniques can be used in a range of power conversion applications, including rectifiers with power factor correction (PFC). Very low current distortion meeting strict avionics requirements (400-800 Hz line frequency) is experimentally demonstrated on a digitally controlled boost PFC employing predictive average current programmed control.

605 citations


"A Computationally Simple Predictive..." refers background or methods in this paper

  • ...This predictive controller provides improved tracking compared to the ideal predictive current controller presented in [22]....

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  • ...Experimental results showing ii(t) tracking with iref(t) = |5sinωLt| trace at 110 V input when the current controller is implemented using (a) ideal predictive controller [22], (b) derived predictive controller with non-idealities....

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  • ...Triangular modulation also ensures stability of predictive average current control [22]....

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  • ...For performance evaluation, an ideal predictive current controller [22] represented by (23) is used....

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  • ...Predictive current control for boost PFC converters without the inclusion of converter nonidealities is presented in [2], [17], [22]–[24]....

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Journal ArticleDOI
Milan M. Jovanovic1, Yungtaek Jang1Institutions (1)
TL;DR: The merits and limitations of several PFC techniques used in today's network-server and telecom power supplies to maximize their conversion efficiencies are discussed, and the effect of recent advancements in semiconductor technology on the performance and design considerations of PFC converters is discussed.
Abstract: A review of high-performance, state-of-the-art, active power-factor-correction (PFC) techniques for high-power, single-phase applications is presented. The merits and limitations of several PFC techniques that are used in today's network-server and telecom power supplies to maximize their conversion efficiencies are discussed. These techniques include various zero-voltage-switching and zero-current-switching, active-snubber approaches employed to reduce reverse-recovery-related switching losses, as well as techniques for the minimization of the conduction losses. Finally, the effect of recent advancements in semiconductor technology, primarily silicon-carbide technology, on the performance and design considerations of PFC converters is discussed.

328 citations


Journal ArticleDOI
Wanfeng Zhang1, Guang Feng1, Yan-Fei Liu1, Bin Wu2Institutions (2)
Abstract: A predictive algorithm for digital control power factor correction (PFC) is presented in this paper. Based on this algorithm, all of the duty cycles required to achieve unity power factor in one half line period are calculated in advance by digital signal processors (DSP). A boost converter controlled by these precalculated duty cycles can achieve sinusoidal current waveform. One main advantage is that the digital control PFC implementation based on this control strategy can operate at a high switching frequency which is not directly dependent on the processing speed of DSP. Input voltage feed-forward compensation makes the output voltage insensitive to the input voltage variation and guarantees sinusoidal input current even if the input voltage is distorted. A prototype of boost PFC controlled by a DSP evaluation board was set up to implement the proposed predictive control strategy. Both the simulation and experimental results show that the proposed predictive strategy for PFC achieves near unity power factor.

221 citations


Journal ArticleDOI
Wanfeng Zhang1, Yan-Fei Liu2, Bin Wu3Institutions (3)
Abstract: The bottleneck of digital control for power factor correction (PFC) implementations is mainly due to three aspects: high calculation requirements, high cost, and limited switching frequency compared with analog implementations. A new duty cycle control strategy for boost PFC implementations is proposed in this paper. The duty cycle is determined based on the input voltage, reference output voltage, inductor current, and reference current. The duty cycle determination algorithm includes two terms, the current term and the voltage term, which can be calculated in parallel and requires only one multiplication and three additions (subtractions) operations in digital implementation. A 400-kHz switching frequency boost PFC based on field programmable gate array implementation and its test results show that the proposed new duty cycle control strategy has great potential in the next generation of high switching frequency PFC implementations, due to its lower calculation requirement, lower cost, and better performance than the conventional PFC control methods

150 citations


"A Computationally Simple Predictive..." refers background in this paper

  • ...Predictive current control for boost PFC converters without the inclusion of converter nonidealities is presented in [2], [17], [22]–[24]....

    [...]


Journal ArticleDOI
TL;DR: This paper presents an extension of the predictive current control method to improve the prediction accuracy for a permanent-magnet synchronous motor (PMSM) and improves the robustness of the system against parameter uncertainties.
Abstract: The predictive control method deals with the prediction of the motor behavior based on a mathematical model of the motor. This model is dependent on the motor parameters. However, these parameters may not match with their actual values due to the measurement error or they may change during the operation of the motor. All these uncertainties and model inexactitude lead to inaccurate prediction of the motor behavior and deteriorate the performance of the predictive algorithm. This paper presents an extension of the predictive current control (PCC) method to improve the prediction accuracy for a permanent-magnet synchronous motor (PMSM). The proposed strategy not only reduces the current ripple but also improves the robustness of the system against parameter uncertainties. Simulation and experimental results that confirm the good performance of the proposed method are presented.

142 citations


"A Computationally Simple Predictive..." refers background in this paper

  • ...Methods involving weighting factors, observers, have been explored to reduce the tracking error for inverter and motor drive applications [26]–[29]....

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  • ...To address the tracking error issue in predictive control, various control schemes are evolving in the literature [14], [25]–[29]....

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