scholarly journals New bidirectional step-up DC-DC converter derived from buck- boost DC-DC converter

2021 ◽  
Vol 12 (3) ◽  
pp. 1699
Author(s):  
Ridha D. N. Aditama ◽  
Naqita Ramadhani ◽  
Jihad Furqani ◽  
Arwindra Rizqiawan ◽  
Pekik Argo Dahono
Keyword(s):  
Theoretical Analysis ◽  
Laboratory Experiment ◽  
Cost Efficiency ◽  
Output Voltage ◽  
Voltage Drops ◽  
Lc Filter ◽  
Filter Capacitor ◽  
Switching Devices

<span lang="EN-US">This paper proposes a new bidirectional step-up DC-DC converter, namely modified buck-boost DC-DC converter. The proposed DC-DC converter was derived from the conventional buck-boost DC-DC converter. Output voltage expression of the proposed converter was derived by considering the voltage drops across inductors and switching devices. The results have shown that with the same parameter of input LC filter, proposed DC-DC converter has lower conduction losses. Moreover, the proposed DC-DC converter has lower rated voltage of filter capacitor than the conventional boost DC-DC converter which lead to cost efficiency. Finally, a scaled-down prototype of laboratory experiment was used to verify its theoretical analysis.</span>

scholarly journals A method for calculating the parameters of the sine filter of the frequency converter, taking into account the criterion of starting current limitation and pulse-width modulation frequency

2021 ◽  
Vol 1 (8 (109)) ◽  
pp. 6-16
Author(s):  
Volodymyr Nerubatskyi ◽  
Oleksandr Plakhtii ◽  
Denys Hordiienko ◽  
Serhii Mykhalkiv ◽  
Vasyl Ravluyk
Keyword(s):  
Power Generation ◽  
Output Voltage ◽  
Modulation Frequency ◽  
Frequency Converter ◽  
Harmonic Distortion ◽  
Voltage Inverter ◽  
Starting Current ◽  
Lc Filter ◽  
Power Generation Systems ◽  
Filter Capacitor

An analysis of the method for ensuring the sinusoidality of the output voltage in power generation systems with self-commutated voltage inverters under the requirements of the international standard IEEE-519 is presented. In a number of programs, especially low-power generation systems, a low-cost solution is needed to provide the sinusoidal waveform of the output voltage with the total harmonic distortion of 5 %. This solution is to use two-level voltage inverters with an output sine LC filter. However, the feature of the sine filter with the frequency converter is that the PWM frequency affects the spectrum of higher harmonics of the output voltage. In addition, there is the starting current of the filter capacitor, which can disable the power switches of the voltage inverter. The developed method for calculating the values of the LC filter with the two-level voltage inverter in the PWM mode is presented meeting the requirements of the international standard IEEE-519, taking into account the modulation frequency and limitation of the starting current of the filter capacitor. To confirm the required quality of the output voltage of the two-level voltage inverter with the sine filter, an appropriate simulation model was created in the Matlab/Simulink computer simulation environment. The oscillograms and harmonic analysis of the input and output voltages of the sine filter, which showed the total harmonic distortion of 1.88 %, are presented. A physical prototype of the investigated system was created on the basis of a 5.5 kW OVEN PChV203-5K5-V frequency converter (Ukraine). Using the SIGLENT SDS1104X-E oscilloscope (China), the real waveform and the results of the harmonic analysis of the sine filter output voltage, confirming the implementation of the necessary sinusoidality criteria, were obtained

scholarly journals Effect of the DC-Link Capacitor Size on the Wireless Inductive-Coupled Opportunity-Charging of a Drone Battery

Energies ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2621 ◽  
Author(s):  
Andrea Carloni ◽  
Federico Baronti ◽  
Roberto Di Rienzo ◽  
Roberto Roncella ◽  
Roberto Saletti
Keyword(s):  
Excitation Frequency ◽  
Wireless Power Transfer ◽  
Experimental Tests ◽  
Secondary Coil ◽  
Power Transfer ◽  
Wireless Power ◽  
Large Current ◽  
Bridge Rectifier ◽  
Lc Filter ◽  
Filter Capacitor

Wireless inductive-coupled power transfer and opportunity battery charging are very appealing techniques in drone applications. Weight and size are very critical constraints in drones, so the battery and the on-board electronics must be as light and small as possible. The on-board components involved in the resonant inductive-coupled wireless power transfer usually consist of the secondary coil, the compensation capacitor, the bridge rectifier, the LC-filter and the battery. This paper suggests a sizing of the LC-filter capacitor that improves the charging power of the battery. In addition, further on-board space and size is saved by using the stray inductance of the battery as filtering inductor. LTSpice simulations and experimental tests carried out on the prototype of a wireless power transfer circuit shows the dependency of the power delivered to the battery on the filter capacitor size. Finally, it is found that the power transfer to the battery is maximized by choosing the capacitor value that sets the LC-filter resonant frequency close to the double of the excitation frequency of the wireless charging. The drawback is a large current and voltage ripple in the battery.

Implementation of Coupled Inductor Based 7-level Inverter with Reduced Switches

2017 ◽  
Vol 8 (3) ◽  
pp. 1294 ◽  
Author(s):  
R. Palanisamy ◽  
K. Vijayakumar ◽  
Aishwarya Bagchi ◽  
Vachika Gupta ◽  
Swapnil Sinha
Keyword(s):  
Output Voltage ◽  
Control Algorithm ◽  
Harmonic Distortion ◽  
Current Control ◽  
Output Current ◽  
Hysteresis Current Control ◽  
Common Mode Voltage ◽  
Voltage Stress ◽  
Dsp Controller ◽  
Switching Devices

<p>This paper proposes implementation of coupled inductor based 7 level inverter with reduced number switches. The inverter which generates the sinusoidal output voltage by the use of coupled inductor with reduced total harmonic distortion. The voltage stress on each switching devices, capacitor balancing and common mode voltage can be minimized. The proposed system which gives better controlled output current and improved output voltage with diminished THD value. The switching devices of the system are controlled by using hysteresis current control algorithm by comparing the carrier signals with constant pulses with enclosed hysteresis band value. The simulation and experimental results of the proposed system outputs are verified using matlab/Simulink and TMS320F3825 dsp controller respectively.</p>

Theoretical analysis of magnetic sensor output voltage

2011 ◽  
Vol 323 (12) ◽  
pp. 1667-1670 ◽  
Author(s):  
Haishun Liu ◽  
Chaochao Dun ◽  
Linming Dou ◽  
Weiming Yang
Keyword(s):  
Theoretical Analysis ◽  
Output Voltage ◽  
Magnetic Sensor ◽  
Sensor Output

scholarly journals Novel Step-Up Topologies of Zigzag Autotransformer

Electronics ◽  
2021 ◽  
Vol 10 (24) ◽  
pp. 3071
Author(s):  
Jiarong Wang ◽  
Bo He
Keyword(s):  
Theoretical Analysis ◽  
Output Voltage ◽  
Optimal Topology ◽  
Transformation Ratio ◽  
Simulation Parameters ◽  
The Relationship ◽  
Equivalent Capacity

Zigzag autotransformer is widely used in multi-pulse rectifier system. However, the traditional zigzag autotransformer does not have the step-up function. Meanwhile, by improving the zigzag autotransformer structure, the output voltage can be increased without additional auxiliary components. Therefore, based on the 12 pulse rectifier system, this paper analyzes and designs three zigzag autotransformer step-up topologies, establishes the corresponding mathematical topology, studies the relationship between the transformation ratio and system main parameters, and deduces the step-up range of the three topologies. When the transformation ratio is greater than or equal to 1.0353 and less than 2.0705 and when the transformation ratio is greater than or equal to 2.0705, the equivalent capacity of the three topologies are compared. Based on the comparison, the optimal topology is obtained in different cases. Finally, according to the theoretical analysis, the simulation parameters are set, the simulation circuit is built, and the results are analyzed combined with corresponding mathematical topologies.

scholarly journals Design and Analysis of Single Switch Transformer Less DC-DC Converter with Universal Input Voltage for Fuel Cell based Vehicles

2021 ◽  
pp. 1262-1272
Author(s):  
R. Birundha ◽  
Dr. P. Maruthapandi
Keyword(s):  
Fuel Cell ◽  
Output Voltage ◽  
Common Ground ◽  
Life Time ◽  
Input Voltage ◽  
High Gain ◽  
Voltage Gain ◽  
Voltage Drops ◽  
Solar Powered ◽  
Output Characteristics

A new single switch solar powered high gain step-up DC-DC converter is proposed for plug-in hybrid battery charger in Electric vehicle (EV). The proposed topology utilizes a L2C3D2network to obtain high voltage gain and reduce the voltage stress on the power switch. Additionally, the proposed converter has a universal input voltage in order to suit the soft output characteristics of the fuel cell. The fuel cell has a relatively low output voltage and high current, and it has soft output characteristics as its output voltage drops as the output current increases. Therefore, the fuel cell cannot be directly interfaced to the dc-link bus (400V) of the inverter inside the EV. This dc-dc converter has a universal input voltage feature with wide voltage gain range to suit the soft output characteristics of the fuel cell. Additionally, this dc-dc converter has to have low input current ripple to prolong the life time of the fuel /solar cell, and a common ground between its input and output ports to avoid additional EMI and maintenance safety problem. This control strategy is modelled and simulated using MATLAB -Simulink. A proto type experimental has been fabricated and tested. The experimental analysis was done and the results are in line with the simulation results.

scholarly journals Alat Monitoring Infus Set pada Pasien Rawat Inap Berbasis Mikrokontroler ATmega 8535

2018 ◽  
Vol 4 (1) ◽  
pp. 1 ◽  
Author(s):  
DECY NATALIANA ◽  
NANDANG TARYANA ◽  
EGI RIANDITA
Keyword(s):  
Noise Level ◽  
Output Voltage ◽  
Threshold Value ◽  
Infrared Sensors ◽  
Voltage Drops ◽  
Digital Comparator ◽  
Infra Red ◽  
Voltage Signal ◽  
Data Processor ◽  
Infusion Fluid

ABSTRAKMetode yang digunakan untuk mengetahui volume cairan Infus adalah dengan cara mendeteksi tetesan yang berada pada chamber Infus. Tetesan dideteksi oleh sensor cahaya yaitu LED infra merah dan photodioda. Sinyal tegangan dari sensor dikondisikan dengan IC komparator LM339 . Mikrokontroler ATmega 8535 digunakan sebagai pengolah data  I/O dari komparator sehingga informasi dari parameter  yang dimonitor dapat ditampilkan pada LED dan LCD serta bunyi buzzer. Tegangan keluaran sensor infra merah saat mendeteksi tetesan adalah sebesar 1,02 V sedangkan saat tidak mendeteksi tetesan tegangan keluaran sebesar 180 mV. Parameter yang dapat dideteksi dari alat ini diantaranya jumlah tetesan per menit dengan maksimal jumlah tetes / menit yang dideteksi sebesar 255 tetes, peringatan bila tetesan tidak terdeteksi selama 10 detik dan peringatan bila cairan Infus akan habis (± 50 ml). Suara yang dihasilkan buzzer masih terdengar jelas dan tidak berbahaya bagi pendengaran perawat berdasarkan nilai ambang batas tingkat kebisingan meskipun keadaan di ruangan perawat dalam kondisi ramai.Kata kunci: Infus set, intravena, photodioda, infra merah, mikrokontroler ATmega 8535, Infus. ABSTRACTThe method used to know the volume of Infusion fluid is detecting droplets that are on Infusion chamber. The droplets are detected by the light sensors is infrared LED and  photodiode. The voltage signal from the sensor is conditioned by the digital comparator IC LM339. ATmega microcontroller 8535 is used as a data processor of the comparator output so that information from the monitored parameters can be displayed on the LCD and LED and buzzer flame. The output voltage when infrared sensors detect a drop is 1.02 V, while sensor does not detect a drop the output voltage drops is 180 mV. Parameters that can be detected from these tool include the number of drops per minute with a maximum number of drops / min was detected at 255 drops, a warning when the droplets are not detected for 10 seconds and a warning when Infuse fluids will run out (± 50 ml). Buzzer’s sound still clearly audible and not dangerous for nurse’s hearing based on noise level threshold value though the situation in the nurse’s room in crowded conditions.Keywords: Infusion sets, intravenous, photodioda, infra red, microcontroller, Infusion.

scholarly journals A Renewable Energy Fed Non-Isolated Inverse Output Voltage DC-DC Converter with Broad Range of Conversion

2019 ◽  
Vol 8 (5S3) ◽  
pp. 160-163
Keyword(s):  
Renewable Energy ◽  
Theoretical Analysis ◽  
Output Voltage ◽  
Conversion Ratio ◽  
Negative Voltage ◽  
Wide Range ◽  
Negative Output

Renewable Energy fed non-isolated negative output Converter with dc-dc conversion is proposed which employed for various applications. In industrial purposes only few converters are available for wide conversion ratio, the proposed design has come up with wide range negative voltage load applications. The proposed converter is analyzed and design for continuous condition mode. For verification of theoretical analysis, the proposed converter is simulated using PSIM 9.0.

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