A boost DC-AC converter: analysis, design, and experimentation

IEEE Transactions on Power Electronics, 2005

Boost dc-ac inverter naturally generates in a single stage an ac voltage whose peak value can be lower or greater than the dc input voltage. The main drawback of this structure deals with its control. Boost inverter consists of Boost dc-dc converters that have to be controlled in a variable-operation point condition. The sliding mode control has been proposed as an option. However, it does not directly control the inductance averaged-current. This paper proposes a control strategy for the Boost inverter in which each Boost is controlled by means of a double-loop regulation scheme that consists of a new inductor current control inner loop and an also new output voltage control outer loop. These loops include compensations in order to cope with the Boost variable operation point condition and to achieve a high robustness to both input voltage and output current disturbances. As shown by simulation and prototype experimental results, the proposed control strategy achieves a very high reliable performance, even in difficult transient situations such as nonlinear loads, abrupt load changes, short circuits, etc., which sliding mode control cannot cope with.

V IEEE International Power Electronics Congress Technical Proceedings, CIEP 96

The Sliding mode control theory is applied to a sinusoidal output voltage boost inverter with linear load. The boost inverter is intended to be used in UPS design, whenever an AC voltage larger than the DC link voltage is needed, with no need of a second power conversion stage. Operation, control strategy, simulation and experimental results are'included in this paper.

IET Power Electronics, 2016

A cascade control strategy is employed in the boost inverter to generate a sinusoidal signal at grid frequency with very low distortion. The internal loop of the cascade employs a switching surface based on the difference of the inductor currents to induce sliding motions in the power stage. The outer loop in turn establishes the reference of the internal loop and ensures the tracking of an external sinusoidal signal at 50 Hz. The reported approach is analytical and is based on the equivalent control method. The root locus of the capacitor voltages at the equilibrium point of the inner loop is obtained assuming a constant value of the loop reference. In the particular case of a zero reference, sinusoidal variations at grid frequency are superposed to the corresponding equilibrium point and the resulting ideal dynamics are linearized yielding the control to output transfer function of the system. A PI compensator is designed for both large bandwidth and small phase error. Experimental results in a 500 W prototype are in perfect agreement with the analytical predictions. Index Terms-Renewable energy, autonomous systems, boost inverter, two-loop sliding-mode control.

IEEE Transactions on Industrial Electronics, 2000

The boost inverter is a device that is able to generate a sinusoidal voltage with an amplitude larger than the input voltage. Based on the idea of indirectly controlling the output voltage through the inductor current, a dynamical sliding-mode controller for the boost inverter is proposed in this paper. Unlike the usual approach of generating a sinusoidal voltage in both capacitors of the boost inverter, the strategy proposed in this paper focuses on generating a sinusoidal voltage on the load despite the voltage form of both capacitors. A consequence of doing so is that only the desired output voltage is required as reference to implement the controller. Furthermore, it has a fast response, is robust under load and input voltage variations, and yet, is remarkably simple to implement. Although it is strongly nonlinear, it can be implemented using standard electronics circuitry and only needs voltage measurements.

International Journal of Power Electronics and Drive Systems, 2023

Boost converters are employed in DC motors, switch-mode power supplies, and other applications. Practical implementation difficulties, reliance on variable-frequency units, and delayed dynamic responses to changes in load and voltage are the main drawbacks of different control methods for the boost converter. In this paper, two techniques were proposed with the target of controlling the boost converter to improve the efficiency of the converter's performance. The two techniques used in this paper depended on fixed-frequency mode instead of variable-frequency mode because of the demerits of the latter factor. The first technique is the sliding-mode control for the AC-DC converter to achieve power factor correction and reduce the harmonic ratio significantly while regulating the output voltage. This technique was used for the DC-DC converter to obtain a rapid dynamic response to control sudden or considerable changes in loads or input voltages with a regulated output voltage. Moreover, the two-loop cascade control is the second proposed technique for the DC-DC converter to achieve an excellent dynamic response under step loads or input voltage variations with an excellently regulated output voltage. Re-simulation results validated the proposed design approach and illustrated the proposed controller's robustness and faster response time.

2013

This paper presents a novel control strategy of AC/DC power converters. The proposed control algorithm is based on Sliding Mode Control methodology. The basic idea is to apply feedback implementation of pulse-width modulation (PWM). The method exhibits low sensitivity to disturbances and fast dynamic performance in addition to the main converter properties. The proposed sliding mode control method ensures that the power converter has the following properties: unity power factor, sinusoidal input currents, and low level of DC output voltage ripple. Discussion starts with the circuit model and design methodology. Then, a sliding mode current control tracking system is designed. Finally, output voltage control is developed. The effectiveness of the proposed control strategy has been demonstrated through various simulation cases.

IEEE Transactions on Circuits and Systems I: Regular Papers, 2004

This paper presents a sliding-mode control design of a boost-buck switching converter for a voltage step-up dc-ac conversion without the use of any transformer. This approach combines the step-up/step-down conversion ratio capability of the converter with the robustness properties of sliding-mode control. The proposed control strategy is based on the design of two slidingcontrol laws, one ensuring the control of a full-bridge buck converter for proper dc-ac conversion, and the other one the control a boost converter for guaranteeing a global dc-to-ac voltage step-up ratio. A set of design criteria and a complete design procedure of the sliding-control laws are derived from small-signal analysis and large-signal considerations. The experimental results presented in the paper evidence both the achievement of step-up dc-ac conversion with good accuracy and robustness in front of input voltage and load perturbations, thus validating the proposed approach.

IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics, 2006

A sliding-mode control using a new sliding surface just depending on the output voltage is proposed for the boost inverter. It overcomes some disadvantages that the traditional sliding-mode control has. The surface is derived from the currentmode control idea of indirectly controlling the output voltage through the inductor current. The controller has a fast response, is robust under load and input voltage variations, and yet is remarkable simple to implement. Although it is strongly nonlinear, it can be implemented using standard electronics circuitry and only needs voltage measurements. Unlike the common approach of generating a sinusoidal voltage in both capacitors of the inverter, the strategy here proposed, focuses on generating a sinusoidal voltage on the load despite the capacitors voltage form. As a consequence, the desired output voltage is just necessary as a reference to implement the controller.

Circuits and Systems I: …, 2004

Abstract—This paper presents a sliding-mode control design of a boost–buck switching converter for a voltage step-up dc–ac con-version without the use of any transformer. This approach com-bines the step-up/step-down conversion ratio capability of the con-verter with the ...

IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03., 2003

The boost inverter is a latterly proposed device that is used in applications like uninterruptible power supplies (UPS) and photovoltaic systems. Its main feature is the ability to invert and boost at a single stage. Io this paper, the implementation of a recently proposed sliding-mode-based, nonlinear controller for the boost inverter is presented. Unlike previously proposed controllers, the control law used here only depends on the input and the output voltages making unnecessary the inductor current measurement This fact results in a cost reduction, an easier design, and the overall system reliability is improved.