Nirma Peter - Academia.edu (original) (raw)
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Papers by Nirma Peter
2023 10th International Conference on Signal Processing and Integrated Networks (SPIN)
In this work, the design and development of a high step down transformer less single stage single... more In this work, the design and development of a high step down transformer less single stage single switch ac/dc converter is discussed. This converter is used for stepping down the universal line voltage (90-270 Vrms). Here for experimental set up we obtain 19V output by giving 100V as input. Important feature of this topology is that it uses Direct power transfer scheme. The advantage of this topology is that it uses single switch for power factor correction and voltage regulation. So it find better application in low power applications. In order to reduce the switching loss in normal working condition, a soft switching technique is implemented. Under light load condition, This problem is solved by using a buck topology for the PFC stage of the single-stage single-switch converters as it can be completely turned OFF by operating the converter only near the zero crossing of the input voltage, due to the presence of the dead angle of input current.
for universal line applications (90-270 Vrms). The topology consists of a buck-type power-factor ... more for universal line applications (90-270 Vrms). The topology consists of a buck-type power-factor correction (PFC) cell with a buck-boost dc/dc cell and part of the input power is directly coupled to the output after the first power processing. With this direct power transfer and sharing capacitor voltages, the converter is able to achieve efficient power conversion, high power factor, low voltage stress on intermediate bus (less than 120 V) and low output voltage without a high step-down transformer. The absence of transformer reduces the size of the circuit , component counts and cost of the converter. Unlike most of the boost-type PFC cell, the main switch of the proposed converter only handles the peak inductor current of dc/dc cell rather than the superposition of both inductor currents. Tight voltage regulation is provided by using PID controller. Detailed analysis and design procedures and simulation of the proposed circuit are given .
2023 10th International Conference on Signal Processing and Integrated Networks (SPIN)
In this work, the design and development of a high step down transformer less single stage single... more In this work, the design and development of a high step down transformer less single stage single switch ac/dc converter is discussed. This converter is used for stepping down the universal line voltage (90-270 Vrms). Here for experimental set up we obtain 19V output by giving 100V as input. Important feature of this topology is that it uses Direct power transfer scheme. The advantage of this topology is that it uses single switch for power factor correction and voltage regulation. So it find better application in low power applications. In order to reduce the switching loss in normal working condition, a soft switching technique is implemented. Under light load condition, This problem is solved by using a buck topology for the PFC stage of the single-stage single-switch converters as it can be completely turned OFF by operating the converter only near the zero crossing of the input voltage, due to the presence of the dead angle of input current.
for universal line applications (90-270 Vrms). The topology consists of a buck-type power-factor ... more for universal line applications (90-270 Vrms). The topology consists of a buck-type power-factor correction (PFC) cell with a buck-boost dc/dc cell and part of the input power is directly coupled to the output after the first power processing. With this direct power transfer and sharing capacitor voltages, the converter is able to achieve efficient power conversion, high power factor, low voltage stress on intermediate bus (less than 120 V) and low output voltage without a high step-down transformer. The absence of transformer reduces the size of the circuit , component counts and cost of the converter. Unlike most of the boost-type PFC cell, the main switch of the proposed converter only handles the peak inductor current of dc/dc cell rather than the superposition of both inductor currents. Tight voltage regulation is provided by using PID controller. Detailed analysis and design procedures and simulation of the proposed circuit are given .