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Ashwini Kumari P

Bio: Ashwini Kumari P is an academic researcher. The author has contributed to research in topics: Inverter & Maximum power point tracking. The author has an hindex of 1, co-authored 1 publications receiving 5 citations.

Papers
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Journal Article
TL;DR: In this article, a low frequency transformer is used to make project cost effective and sinusoidal pulse width modulation technique is employed for control circuit to obtain single phase pure sine wave inverter for PV applications.
Abstract: with the increase in the utilization of solar energy there is a need for renewable energy sources. A low frequency transformer is used to make project cost effective and sinusoidal pulse width modulation technique is employed for control circuit to obtain single phase pure sine wave inverter for PV applications. Distortion in the output waveform is minimized for both inductive and capacitive load by considering closed loop control PIC microcontroller is used to generate PWM pulses. The simulation is carried out using MATLAB to verify the presented approach.

5 citations

Proceedings ArticleDOI
16 Oct 2022
TL;DR: In this article , the authors show that a smaller number of range estimations will likely be enough to offset the time-changeability of range inhabitance and the veiled station issue.
Abstract: In the beginning, it is important to show that a smaller number of range estimations will likely be enough to offset the time-changeability of range inhabitance and the veiled station issue. In order to improve the precision of spectrum recovery detection, I'd like to second the idea of framework plan detection. Simulators are used to validate our theoretical findings and show that collaboration increases the likelihood of identification even when each auxiliary client provides only a few estimates. Furthermore, show that it is sufficient to consider a subset of close-by optional customers in order to obtain comparable results. It is suggested to use a conveyed compressive inspecting technique, which takes less estimates when conquering, for acceptable wideband spectrum sensing.

2 citations

Proceedings ArticleDOI
16 Oct 2022
TL;DR: In this paper , the communication between Arduino Mega microcontroller and mini thermal printer is implemented by hardware and software integration, the microcontroller is programmed to transfer the data from microcontroller to printer using a serial communication protocol such as universal asynchronous receiver and transmitter (UART) via serial communication devices such as MAX232 converter, DB9 connector which is nothing but RS232 serial port, and universal serial bus (USB) communication port.
Abstract: In this paper, the communication between Arduino Mega microcontroller and mini thermal printer is implemented by hardware and software integration. The microcontroller is programmed to transfer the data from microcontroller to printer using a serial communication protocol such as universal asynchronous receiver and transmitter (UART) via Serial communication devices such as MAX232 converter, DB9 connector which is nothing but RS232 serial port, and universal serial bus (USB) communication port. Data sent by the microcontroller is made to print from the printer and it is shown in the result section. Digital pins '3' and '4' on the microcontroller are used as virtual Rx and Tx serial lines while leaving the main serial port open for debugging purposes. Interfacing between UART of microcontroller, MAX232, serial port, and the USB port of printer are well established with the complete schematic diagram. The mini thermal printer prints whatever is sent by the microcontroller. A simple code similar to the one used for the serial monitor works for the printer. The baud rate needs to be set at 9600 for the microcontroller to communicate with the printer. The system is designed to print data wirelessly using Bluetooth HC05 for restaurant and hospital management applications. The system has high adaptability. It can be used in many situations not only for restaurant and hospital management.

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Journal ArticleDOI
TL;DR: This paper proposes the design of 17 levels of a single-phase cascaded multilevel inverter with a hybrid filter insertion and proves reducing THD better than single pulse width modulation (SPWM) inverter by using PSIM simulator.
Abstract: The increasing of renewable energy applications such as solar cells, wind power, ocean thermal and HVDC (high voltage direct current) cause increment in the use of the inverter circuit. Harmonics that are generated by the inverter have negative impacts on the electrical equipment; harmonics cause excessive heat and may shorten the life of electrical equipment. A multilevel inverter is an arranged of cascaded inverters which aims to reduce total harmonic distortion (THD). This paper proposes the design of 17 levels of a single-phase cascaded multilevel inverter with a hybrid filter insertion. By using PSIM simulator, the hybrid filter is proven reducing THD better than single pulse width modulation (SPWM) inverter. Installation of the hybrid filter is able to fix a maximum of 0.23% THDv and a maximum of 1.05% THDi. Hybrid filter installation reduces the value of THD to comply with IEEE 519-2014 standard.

11 citations

Proceedings ArticleDOI
25 Mar 2015
TL;DR: This paper proposes a design that is easy to implement and proves to be cost effective for low power applications and focuses on utilizing renewable solar energy by incorporating Multi vibrator IC (NE 555) for the PWM generation technique used to drive pure sine wave inverter.
Abstract: Pure sine wave inverters are demand of modern era whenever it comes to utilization of DC power sources for both low and high power applications. These invertors not only increase the efficiency of the power system but also prevent the electrical components from damaging. Research has been carried out on producing cost-effective and efficient pure sine wave inverter in recent times and this paper proposes a design that is highly useful for low power based applications. Paper focuses on utilizing renewable solar energy by incorporating Multi vibrator IC (NE 555), in this case operating in A-stable mode, for the PWM generation technique used to drive pure sine wave inverter. It is shown that the design is easy to implement and proves to be cost effective for low power applications.

10 citations

Journal ArticleDOI
TL;DR: In this paper, a multi-vibration technique is used to generate a square wave which is then split into two square waves of the same frequency by the 4017-decade counter to hold the H-bridge inverter.
Abstract: Pure sine wave transformers are very important nowadays when it comes to using ds power sources for both low and high-power applications. These inverters not only increase the efficiency of the power system but also prevent electrical components from damaging. Much work has been done in the field of pure sine wave inverter but for a waveform with low number of harmonics along with high efficiency is still an open challenge. There are techniques available to do this, but the need to adapt to a solution that is easy to implement as well as specifically for low energy applications. In this paper, a multi-vibration technique is used to generate a square wave which is then split into two square waves of the same frequency by the 4017-decade counter to hold the H-bridge inverter. The output of the H-bridge inverter contains harmonics that are filtered using a low pass filter. Thus, we get a pure sin wave in the output.

1 citations

Journal ArticleDOI
21 Mar 2017
TL;DR: In this paper, a modified square wave inverter system that is specified to work properly from batteries with nominal voltages of 6, 12, 18 and 24 V was designed, and a model of the microcontroller-based circuit was developed with Proteus® software.
Abstract: A power inverter circuits is normally designed to meet its design specifications when the applied input DC voltage is within specified tolerance limits. Thus, single input inverters are usually specified to work from a DC source having a fixed nominal voltage. This limits the usefulness of the inverter circuit when a DC source having the specified nominal voltage is not available. In this work, a modified square wave inverter system that is specified to work properly from batteries with nominal voltages of 6, 12, 18 and 24 V was designed. A model of the microcontroller-based circuit was developed with Proteus® software and its firmware was written in C language using the MicroC® development tool. A prototype of the circuit was constructed and then tested. The constructed circuit was found to work properly by producing a 50 Hz modified square waveform when it was powered from batteries having nominal voltages of 6 V, 12 V, 18 V and 24 V.

1 citations

Journal Article
TL;DR: In this paper, a single phase full bridge inverter with voltage control for nonlinear load applications is presented, where PWM (Pulse Width Modulation) technique is used to control voltage while pure sine wave obtained by using two techniques one is through band pass filter (as high value inductor are rarely available and also difficult to build thus combination of high pass and low pass filter used) at output and other is by DAC (Digital to Analog Conversion).
Abstract: DC to AC Converters generate discrete output wave forms. Mostly, neither the voltage nor the current have the desired wave forms and also produce harmonic, power losses and high frequency noise. The non-sinusoidal wave form will make the electronic equipment to burn early. The loss of power will make the system uneconomical. All this include the poor performance of the existing DC to AC converters. In this paper, pure sine wave with voltage control for nonlinear load applications is presented for single phase full bridge inverter. PWM (Pulse Width Modulation) technique is used to control voltage while pure sine wave obtained by using two techniques one is through band pass filter (as high value inductor are rarely available and also difficult to build thus combination of high pass and low pass filter used) at output and other is by DAC (Digital to Analog Conversion). Moreover, the proposed controller used for output voltage control is PID. It works as voltage controller for inverter control to eliminate the steady state error under heavy load applications. The better sine wave output and reduce steady state error will make this inverter both efficient and economical in terms of energy savings. The experimental results verify the simulation results obtained using Matlab® Simulink and Proteus®.

1 citations