Modeling, analysis, and design of the quasi-charge control

Huliehel, F.A.; Tang, Wei; Lee, F.C.; Cho, B.H.

doi:10.1109/63.406848

Cited by 11 publications

(4 citation statements)

References 16 publications

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“…Considering (3), (10) and (12) it is possible to write the modulator equation and to simplify it, in order to include only one integrator. The result is (13) Equation (13) shows that O3C modulation may be performed using the OCC structure, where the integrated variable is the sum of and and the comparison voltage is the sum of with the correction terms for inductor current and capacitor voltage. A second integrator for ripple amplitude calculation is no longer necessary.…”

Section: Modulator Equation and Circuitmentioning

confidence: 99%

“…Other control processes like one cycle control (OCC) [10], [11], quasi-charge control [12], [13], and more general sensorless feedforward controllers [14]- [16], use resetable integrators to perform pulse width modulators with improved performance. Sliding mode control [17], hysteretic control [18] and a combination of hysteretic and synthetic ripple control [19] are also examples for improving the buck converter behavior.…”

Section: Introductionmentioning

confidence: 99%

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Transient Behavior and Frequency Response of Constant Frequency One Cycle Charge Control Modulator (O3C)

Marques

Borges

Anunciada

2008

IEEE Trans. Power Electron.

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This paper presents a new pulse width modulator capable of adjusting the conversion duty ratio so that the necessary output filter charge will reach its steady-state value in only one switching period, when any disturbance of the input voltage, output current or output voltage occurs. The proposed modulator is based on the calculation of the variation of the electric charge required to restore the steady-state operation in only one switching period, and therefore is designated by one cycle charge control (O3C). The synthesis of the proposed modulator is presented in detail. It will be also shown, theoretically, by simulation and experimentally, that the use of this modulator in a buck converter presents as a major advantage, the fact that the output voltage gain is not limited by the cutoff frequency of the output filter. As a consequence, very low output ripple can be achieved without compromising the dynamic response of the converter. Comparative simulation results considering the presented modulator and the conventional one cycle control, both applied to a buck converter in the same conditions, are also presented.Index Terms-DC-DC converters bandwidth, integrating pulse width modulators, one cycle control (OCC).

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Section: Modulator Equation and Circuitmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transient Behavior and Frequency Response of Constant Frequency One Cycle Charge Control Modulator (O3C)

Marques

Borges

Anunciada

2008

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

show abstract

“…Usually, current-mode control methods are divided into two main categories: 1) fixfrequency methods and 2) variable frequency methods. Different types of fix-frequency methods including: peak current-mode control (PCMC), average current mode control (ACMC), valley control, and charge control [5,6] have been introduced. Among all of these methods, PCMC is the most common one in which the peak value of the inductor current is sensed and compared with the current reference for the generation of the PWM signal.…”

Section: Introductionmentioning

confidence: 99%

Modified projected cross point control — a small signal analysis

Khazraei

Ferdowsi

2009

2009 IEEE Energy Conversion Congress and Exposition

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In this paper, the small-signal analysis of the modified projected cross point control (PCPC) method is investigated. Modified PCPC is a new current-mode control approach which benefits from several advantages over common current-mode control methods such as peak current-mode control (PCMC) and average current-mode control (ACMC). Followed by the small-signal analysis, different small-signal transfer functions for this method are obtained. To prove the significant superiority of the modified PCPC controller, the small-signal properties of this novel method are compared with those of the PCMC and ACMC approaches.

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“…Usually, current-mode control methods are divided to two main categories: 1) fixed-frequency methods and 2) variable-frequency methods. Different types of fixed-frequency methods have been introduced in the literature including: peak current-mode control (PCMC) [2], average current mode control (ACMC) [3], valley control [2], and charge control [4,5]. Among these methods, PCMC and ACMC are more popular.…”

Section: Introductionmentioning

confidence: 99%

Modified projected cross point control — a large signal analysis

Khazraei¹,

Ferdowsi²

2009

2009 IEEE Energy Conversion Congress and Exposition

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Modified projected cross point control (PCPC) is introduced and discussed in this paper. Compared to the existing PCPC method, the hardware implementation of the proposed modified method is simpler. This modified PCPC method benefits from the advantages of traditional fixed-and variable-frequency current mode control approaches. For instance, as argued in this paper, while modified PCPC is a fixed-frequency approach, it is stable for the entire range of the duty cycle similar to the variable-frequency hysteresis current mode control scheme. Other advantages and large-signal characteristics of modified PCPC are discussed by comparing it with the well-known peak and average current mode control methods.

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Modeling, analysis, and design of the quasi-charge control

Cited by 11 publications

References 16 publications

Transient Behavior and Frequency Response of Constant Frequency One Cycle Charge Control Modulator (O3C)

Transient Behavior and Frequency Response of Constant Frequency One Cycle Charge Control Modulator (O3C)

Modified projected cross point control — a small signal analysis

Modified projected cross point control — a large signal analysis

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Modeling, analysis, and design of the quasi-charge control

Cited by 11 publications

References 16 publications

Transient Behavior and Frequency Response of Constant Frequency One Cycle Charge Control Modulator (O3C)

Transient Behavior and Frequency Response of Constant Frequency One Cycle Charge Control Modulator (O3C)

Modified projected cross point control &#x2014; a small signal analysis

Modified projected cross point control &#x2014; a large signal analysis

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Product

Resources

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Modified projected cross point control — a small signal analysis

Modified projected cross point control — a large signal analysis