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Energy Storage
Published in Denise Wilson, Wearable Solar Cell Systems, 2019
where the power lost in the boost converter itself arises from a variety of sources that are outside the scope of this discussion. While efficiencies close to 99% are possible in high-voltage/high-power boost converters, efficiency drops dramatically for light loads with maximum efficiencies around 90% for load currents less than 1 A (Davis 2018). Boost converter efficiencies also drop as the converter gain (Vout/Vin) increases. High gains are typically not an issue with wearable solar cell systems. For example, many solar-powered battery chargers contain only eight PV cells in series, capable of producing a maximum voltage of about 5.6 V (at 0.7 V per cell). A boost converter requires a gain of less than 3 to power an 11.1-V laptop computer (Falin and Li 2011).
Converter Design
Published in Majid Jamil, M. Rizwan, D. P. Kothari, Grid Integration of Solar Photovoltaic Systems, 2017
Majid Jamil, M. Rizwan, D. P. Kothari
On the basis of the voltage stepping operation, the DC to DC converters can be classified as follows: Buck converter: A buck converter is a step-down converter that produces a lower average output voltage than the DC input voltage.Boost converter: A boost converter is a step-up converter that produces a higher average output than the DC input voltage.Buck–boost converter: A buck–boost converter is a step-up as well as a step-down converter that produces a higher or a lower value of output voltage compared to the applied input voltage, depending upon the duty cycle of operation.
Power Factor Correction
Published in Ali Emadi, Alireza Khaligh, Zhong Nie, Young Joo Lee, and Digital Control, 2017
Ali Emadi, Alireza Khaligh, Zhong Nie, Young Joo Lee
Here, the boost converter switch is controlled, keeping output voltage of the converter in mind, and it has nothing to do with controlling the switches of the main SRM drive circuit. But during dynamic conditions it should be observed that the overall system is not going to be unstable. Sometimes all the switches in a system are synchronized to avoid this problem. By modulating the duty cycle of the boost converter switch, the input current can be controlled to track the input voltage. With low distortion and accurate tracking between current and voltage, the power factor obtained from adding a front-end boost converter is typically higher than 99% and the input current THD is normally less than 5%.
Design and implementation of model predictive control for microgrid energy system with power quality improvement features
Published in International Journal of Electronics, 2021
The boost converter can boost up the input DC voltage from the output of the solar energy-based system and the wind energy-based system without a transformer as shown in Figure 4. Boost converter operation is divided into two modes, i.e. mode 1 and mode 2. All modes are operated one by one; hence, during mode 1 both switches are ON and in mode 2, no switch is ON, only diode D is conducting. By adjusting the switches; duty cycle by pulses which are modulated by a carrier signal, boost converter output voltage can be controlled. The cosine firing method is applied to regulate the pulses of the 2-level boost converter.is the controlled voltage which changes with 2-level boost converter input voltage, is the maximum value of integrator output voltage which provides the cosine wave, is the firing angle of the first boost converter and is the firing angle of the second boost converter.
A new controller for boost dc–dc converters based on a novel sliding surface
Published in International Journal of Electronics, 2020
Sanjeev Kumar Pandey, S. L. Patil, Praveen V. Pol, S. B. Phadke
Several control methods are reported in literature to regulate the output voltage of boost converters. The controllers proposed, include H Naim et al. (1997), passivity-based control Zeng et al. (2013), backstepping-based control El Fadil and Giri (2007), cascade control Chen et al. (2010), Bhat and Nagaraja (2015) and Lee et al. (2016), linear matrix equalities-based linear quadratic regulator control Olalla et al. (2009), sliding mode control Utkin et al. (2009), Singh et al. (2015), Mehta and Naik (2014), Yazici and Yaylaci (2016), Ghasemian and Taheri (2017), Alsmadi et al. (2018) and Wang et al. (2017) to name a few. Sliding mode control (SMC) strategy is ideally suited for controlling dc-dc converters because of its well known property of insensitivity to uncertainties such as variation in input voltage and load resistance.
Feedback Controller Design for a Boost Converter Through a Colony of Foraging Ants
Published in Electric Power Components and Systems, 2012
The three basic, single-switch, diode-inductor, non-isolated DC-DC converters, namely buck, boost, and buck-boost converters, have been presented and analyzed extensively in the literature and texts [1]. The boost converter increases a given input DC voltage and is employed in many applications, such as laptop computers, personal communication devices [2], photovoltaic applications [3], power factor correction methods [4], hybrid photovoltaic/wind power system applications [5], piezoelectric energy harvesting systems [6], vehicular systems [7], fuel cell applications [8], etc. When a boost converter is employed in open-loop mode, it exhibits poor voltage regulation and unsatisfactory dynamic response, and hence, this converter is generally provided with closed-loop control for output voltage regulation.