Voltage and Current-Mode Control for a Buck-Converter based on Measured Integral Values of Voltage and Current Implemented in FPGA

Truntič, Mitja; Milanovič, M.

doi:10.1109/tpel.2014.2301935

Cited by 29 publications

(14 citation statements)

References 18 publications

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“…It can be observed from analysis that the static error appeared in current-programmed mode control. In the case when precise current control is required, the PI compensator can be used (Figure 9, switch S in position 1) [38].…”

Section: Current Control With Pi Compensatormentioning

confidence: 99%

Digital Control of an Interleaving Operated Buck-Boost Synchronous Converter Used in a Low-Cost Testing System for an Automotive Powertrain

2018

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Based on the standardization in the automotive industry, systems require extensive testing, which represents significant costs regarding personnel and equipment. The testing systems must be built in such a way that a bidirectional power flow is possible between the power source and the tested system. Additionally, applied testing systems have to possess high disturbance immunity. Classical current programmed control performed using an analogue approach suffers from low disturbance rejection during switching operation. The digital control of DC-DC converter can solve this problem with the use of digital integration in a measurement chain. The integrals of values are obtained by using a Voltage Control Oscillator (VCO) and appropriate counters. Digital control of an interleaving operated bidirectional buck-boost synchronous converter can be applied in the testing system for automotive powertrains. The voltage and current measurements with the application of an integral-measurement principle act as low-pass filters, which remove the disturbances from the measured values. The digital implementation of a compensation ramp (current mode control) and method for choice of control parameters are described. All the tasks for measurements, as well as current and voltage control, were implemented within the FPGA (Field Programmable Gate Array). The presented converter can operate as a close to ideal voltage or current source, and satisfies the requirements of testing electric motor drive-trains with bidirectional DC-AC converters that are applied in automotive applications. The proposed system was verified by simulation and experiments.

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Section: Current Control With Pi Compensatormentioning

confidence: 99%

Digital Control of an Interleaving Operated Buck-Boost Synchronous Converter Used in a Low-Cost Testing System for an Automotive Powertrain

2018

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“…The controller described in the previous section requires knowledge of the estimated value of the load power (P o ) and the estimated value of its time derivative (m) in order to compute (8). In this section a reduced order observer will be used to estimate these variables.…”

Section: Load Power Estimationmentioning

confidence: 99%

“…Generally, designers use control techniques for obtaining converters with high performance. Among others, a complete digital controller, a robust output feedback controller, a self-adaptive discontinuous conduction mode controller and minimum time controller were presented in [8]- [11], respectively.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Control of a Buck Converter Which Feeds a Constant Power Load

Solsona

Jorge

Busada

2015

IEEE Trans. Power Electron.

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In this paper a non-linear control strategy for controlling a dc/dc Buck converter feeding a constant power load is proposed. The main objective of the proposed controller is to improve the transient performance when in presence of unknown power disturbances. A feedback controller is combined with a feedforward strategy. A non-linear reduced order observer is used for estimating the value of the power load and its time derivative. These estimated values are fed forward to the non-linear feedback controller whose design is based on feedback linearization method. The proposed controller is tested via simulation and experimental results. Index Terms-Constant power load, dc/dc converters, feedforward compensation, power converters0885-8993 (c)

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“…In applications such as conveyor belts, the induction motors usually operate at a constant speed and hence, a closed loop buck converter feeding an inverter can really help the motor (connected as a load to the inverter) to maintain specific speed. A complete study of current and voltage mode control of DC/DC converters is presented in [11] and its implementation using FPGA is presented in [12].…”

Section: Response Of An Induction Motor Connected To a Three Levelmentioning

confidence: 99%

Voltage mode controlled buck converter under input voltage variations

Nasir

Iqbal

Rasheed

et al. 2015

2015 IEEE 15th International Conference on Environment and Electrical Engineering (EEEIC)

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Power electronic converters play a vital role in a power system and the most commonly used type of DC/DC converters is buck converter. This is due to the fact that buck converters are widely used to step down the voltage as well as they provide good voltage regulation in critical applications including power supplies for data centers. Therefore, designing a buck converter that gives a regulated output, acceptable for switch mode power supplies is still challenging task. A closed loop buck converter mitigates the problems such as input voltage unstability or variation. This paper discusses the effects of input voltage variations on the open loop and closed loop models of buck converter. VoltageMode Control (VMC) has been proposed to develop an efficient closed loop system in order to avoid voltage fluctuations at the output of the buck converter.

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Voltage and Current-Mode Control for a Buck-Converter based on Measured Integral Values of Voltage and Current Implemented in FPGA

Cited by 29 publications

References 18 publications

Digital Control of an Interleaving Operated Buck-Boost Synchronous Converter Used in a Low-Cost Testing System for an Automotive Powertrain

Digital Control of an Interleaving Operated Buck-Boost Synchronous Converter Used in a Low-Cost Testing System for an Automotive Powertrain

Nonlinear Control of a Buck Converter Which Feeds a Constant Power Load

Voltage mode controlled buck converter under input voltage variations

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