Cascaded Proportional Control With Algebraic Estimators for PFC AC/DC Converters

Zhang, Hengguo; Li, Hongmei; Zhou, Yanan; Shenjie, Zeng

doi:10.1109/tpel.2019.2907652

Cited by 24 publications

(5 citation statements)

References 38 publications

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“…Some methods were proposed to combine reduction of current distortion with responsiveness of DC voltage control by feedforward of load current, 16 exclusion of ripple voltage components calculated from input current, 17 or removal of ripple from detected DC voltage using a notch filter. 18 Particularly, assuming control using analog IC, complex calculations must be avoided in terms of circuit size limitations. Besides, regarding limitations on monolithic capacitance in IC, circuits with a time constant at the commercial frequency level are realized externally.…”

Section: Forewordmentioning

confidence: 99%

Input voltage estimation method and suppression of distortion caused by DC voltage ripple for input current control of PFC

Yamada

Araumi

Wãda

2022

Electrical Engineering Japan

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This paper proposes a new method for input current control of power factor correction (PFC) with continuous conduction mode (CCM), which does not require input voltage detection. As a control method that does not use input voltage detection, pulse width modulation (PWM) with the inductor current as the modulated signal is already in practical use however, this approach has limitations for the range of inductance values used. In CCM-PFC, the input rectified voltage and low-frequency component of the voltage of the switching circuit are approximately equal in the stable state as well as proportional to the PWM signal. This study uses the previous modulated signal as the estimated voltage value to generate an instantaneous current command for feedback control. In addition, a method to suppress the influence of the DC voltage ripple by changing the voltage control gain according to the value of the DC voltage was employed. From the evaluation, it was confirmed that the harmonics of the input current were suppressed within the specified range of values. K E Y W O R D S current control, PFC, voltage detection 1 Similar methods based on the same principles are sometimes called one cycle control or peak current mode control. In the paper, we use the collective term modulated carrier control.

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Section: Forewordmentioning

confidence: 99%

Input voltage estimation method and suppression of distortion caused by DC voltage ripple for input current control of PFC

Yamada

Araumi

Wãda

2022

Electrical Engineering Japan

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“…Besides, the delay-average module in voltage control system is intended to reduce current distortion caused by DC voltage ripple. [11][12][13][14] Details are given in Appendix.…”

Section: Configuration Of Control Systemmentioning

confidence: 99%

“…In a single-phase AC/DC conversion circuit, DC ripple component at the double input frequency is superimposed on amplitude reference in input current control, thus causing distortion; a number of methods were proposed to suppress this distortion. [11][12][13][14] In this study, the ripple component is canceled by adding a value stored ¼ input period (that is, ripple half-period) before.…”

Section: Principle Of Delay Averaging and Stability Analysismentioning

confidence: 99%

Limitation of switching frequency to improve characteristics and suppression of input current distortion for critical mode PFC

Yamada

Araumi

Wãda

2022

Electrical Engineering Japan

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In critical mode power factor correction (PFC), the switching frequency is varied to achieve a sinusoidal input current waveform. Under certain conditions, a higher frequency increases the loss and noise. Meanwhile, the limitation of the switching frequency leads to an increase in input current distortion. This paper proposes a method to prevent an increase in distortion by compensating the pulse width at a limited frequency. Using this control method, critical mode PFC with a limited maximum switching frequency was evaluated. As a result, the total harmonic distortion of the input current was lower than that before the frequency limitation. Furthermore, the improvement in efficiency and the reduction in conducted EMI were confirmed.

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“…In addition, it can improve the closed‐loop performance when controlling plants with non‐minimum‐phase (NMP) zeros [2, 3] or time delays [4, 5]. In terms of practical applications, we can point out several recent works in the field of power electronics [6–9], unmanned aerial vehicles [5, 10, 11] and process control [12, 13].…”

Section: Introductionmentioning

confidence: 99%

“…Design methods for cascade control are in general model‐based, ranging from robust state‐feedback [14] to frequency‐response methods [6]. The plant multi‐loop nature may impose difficulties to the modelling and/or system identification task, most notable the requirement of several plant experiments and coupling between inner and outer loops [1, 15].…”

Section: Introductionmentioning

confidence: 99%

Virtual reference feedback tuning applied to cascade control

Remes

Binz

Flores

et al. 2020

IET Control Theory & Appl

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Virtual reference feedback tuning (VRFT) is a data‐driven control method that optimises the response of a closed‐loop system to reference tracking at the expense of a not optimised response to disturbance rejection. This work presents the application of VRFT to two cascade control structures usually considered in the control literature to improve the overall closed‐loop performance for single‐input systems. For both structures, the authors derive the optimal and practical filter formulation to cope with the case where the controller to be designed is underparameterised. Also, in the case where the internal controller is at the feedback path, they derive a new approach that uses data from a single experiment and considers a unique reference model. Simulation examples illustrate the importance of using the VRFT filter, along with the performance improvements obtained from both cascade loops in terms of reference tracking and disturbance rejection.

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Cascaded Proportional Control With Algebraic Estimators for PFC AC/DC Converters

Cited by 24 publications

References 38 publications

Input voltage estimation method and suppression of distortion caused by DC voltage ripple for input current control of PFC

Input voltage estimation method and suppression of distortion caused by DC voltage ripple for input current control of PFC

Limitation of switching frequency to improve characteristics and suppression of input current distortion for critical mode PFC

Virtual reference feedback tuning applied to cascade control

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