Digital Average Current-Mode Control of PWM DC–DC Converters Without Current Sensors

Qiu, Ying; Liu, Helen; Chen, Xiyou

doi:10.1109/tie.2009.2032130

Cited by 116 publications

(11 citation statements)

References 23 publications

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“…This equation can be described as (10) Based on equation (5), the variation of is (11) From (10), the equation (11) can be obtained.…”

Section: B Calculation Ofmentioning

confidence: 99%

A Sensorless Current Controlled DC-DC Converter with Intelligent Control Technique

ithra¹,

nandam²

2015

IJAREEIE

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This paper presents a elimination of voltage steady-state error and achieve high-accuracy current estimation without using current sensor. The elimination of voltage steady-state error and achieve high-accuracy current estimation purpose using comprehensive compensation strategy. This comprehensive compensation strategy algorithm cannot effectively eliminate the output voltage steady-state error, so fuzzy logic controller is implemented. A digital current-mode controller for dc-dc converters is introduced.The current control mode proposed current observer and PCC algorithm. It achieves the highest observation accuracy by compensating for all the known parasitic parameter. By employing the optimal current observer-based predictive current controller, a boost converter is implemented. The current-mode loop is sensorless, relying on constants and internal loop states. Fast current-mode control mechanism is implemented. This control scheme is that it facilitates the application of a low resolution PWM.

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“…This equation can be described as (10) Based on equation (5), the variation of is (11) From (10), the equation (11) can be obtained.…”

Section: B Calculation Ofmentioning

confidence: 99%

A Sensorless Current Controlled DC-DC Converter with Intelligent Control Technique

ithra¹,

nandam²

2015

IJAREEIE

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“…It also works with valley, pinnacle, and normal current control methods. These strategies not only consider recurrent prescient control or non prescient control [13]- [16] but also require accurate sensing of high-speed inductor currents. Here, we start with a no sensor digital mean current mode control approach in DC-DC choppers, which operate mostly in the continuous mode for conduction (CCM).…”

Section: Introductionmentioning

confidence: 99%

Design of a novel control hysteresis algorithm for photovoltaic systems for harmonic compensation

Obulesu,

Swarupa

2024

Bulletin EEI

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Solar photovoltaic (PV) system design and integration with an existing AC grid is growing very fast in recent years and used by many of them as they are pollution-free, structure is limited and maintenance free. From the factors considering, the performance of PV system depends upon the inverter output voltage tested for linear, non-linear, with harmonic, and without harmonic loads. Generated due to the nonlinear loads. Better inverter control techniques are developed to maintain grid power quality. This article discusses the analysis and comparison of pulse width modulation (PWM) converters with unique and state of the art nonlinear control schemes and various modulation approaches. The primary objective of this research is controlling an active filtering hysteresis PWM converter with no sensors. A simple structure with hysteresis current control method total harmonic distortion (THD) is lower when compared with the sinusoidal pulse width modulation (SPWM) method. The said claims are supported by employing computer simulations using MATLAB/Simulink and different control approaches, such as proportional plus integral and artificial neural network controllers.

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“…A common method to increase the power efficiency of buck converter is the constant on-time (COT) pulse frequency modulation (PFM) method [9−11] . The traditional voltage mode COT control method has always been popular among researchers thanks to its simple circuit configuration, which can be realized just using a simple on-time control module and does not need a compensation network [12] . However, due to its constant on-time, it can only adapt to changes in input voltage, load current and output voltage by adjusting its switching period.…”

Section: Introductionmentioning

confidence: 99%

A high performance adaptive on-time controlled valley-current-mode DC–DC buck converter

et al. 2020

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This paper presents an AOT-controlled (adaptive-on-time, AOT) valley-current-mode buck converter for portable application. The buck converter with synchronous rectifier not only uses valley-current-mode control but also possesses hybrid-mode control functions at the same time. Due to the presence of the zero-current detection circuit, the converter can switch freely between the two operating modes without the need for an external mode selection circuit, which further reduces the design difficulty and chip area. The converter for the application of high power efficiency and wide current range is used to generate the voltage of 0.6–3.0 V with a battery source of 3.3–5.0 V, while the load current range is 0.05–2 A. The circuit can work in continuous conduction mode with constant frequency in high load current range. In addition, a stable output voltage can be obtained with small voltage ripple. In pace with the load current decreases to a critical value, the converter transforms into the discontinuous conduction mode smoothly. As the switching period increases, the switching loss decreases, which can significantly improve the conversion efficiency. The proposed AOT controlled valley current mode buck converter is integrated with standard 0.18 μm process and the simulation results show that the converter provides well-loaded regulations with power efficiency over 95%. When the circuit switches between the two conduction modes drastically, the response time can be controlled within 30 μs. The undershoot voltage is controlled within 25 mV under a large current hopping range.

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Digital Average Current-Mode Control of PWM DC–DC Converters Without Current Sensors

Cited by 116 publications

References 23 publications

A Sensorless Current Controlled DC-DC Converter with Intelligent Control Technique

A Sensorless Current Controlled DC-DC Converter with Intelligent Control Technique

Design of a novel control hysteresis algorithm for photovoltaic systems for harmonic compensation

A high performance adaptive on-time controlled valley-current-mode DC–DC buck converter

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