Power Extraction From an Ultra-Low Input Voltage Source in a Battery-less Thermoelectric Harvester

2021 ◽  
Author(s):  
Dipak Bhapkar ◽  
Ashis Maity
Keyword(s):  
Input Voltage ◽  
Voltage Source ◽  
Low Input ◽  
Power Extraction

A 20-mV Input DC/DC Converter for Energy Harvesting Applications

2015 ◽  
Vol 24 (05) ◽  
pp. 1550070 ◽  
Author(s):  
Zheng Yang ◽  
Jingmin Wang ◽  
Yani Li ◽  
Yintang Yang
Keyword(s):  
Energy Harvesting ◽  
Low Power ◽  
Power Management ◽  
High Efficiency ◽  
Low Power Design ◽  
Input Voltage ◽  
Voltage Source ◽  
Storage Capacitor ◽  
Cmos Process ◽  
Low Input

A low input step-up DC/DC converter and power manager in 0.18-μm CMOS process is presented. The proposed converter can work with the input voltage as low as 20 mV. The extremely low input voltage makes it suitable for energy harvesting and power management. Four logic controlled outputs provide the best voltage for various applications to accommodate low power design requirements. A low current low dropout regulator (LDO) is utilized to provide a regulated 2.2 V output for powering low power processors or other low power integrated circuit (ICs). Reserve energy on the storage capacitor CSTORE provides power when the input voltage source is unavailable, thus prolongs the life of the system and expands the application range. Extremely low quiescent current (6 μA) and high efficiency design (64%@300 μA load current) ensure the fastest possible charge times of the output reservoir capacitor. This work provides a complete power management solution for wireless sensing and data acquisition.

A 50 mV Fully-Integrated Self-Startup Circuit for Thermal Energy Harvesting

2017 ◽  
Vol 26 (12) ◽  
pp. 1750196 ◽  
Author(s):  
Yanzhao Ma ◽  
Yinghui Zou ◽  
Shengbing Zhang ◽  
Xiaoya Fan
Keyword(s):  
Energy Harvesting ◽  
Thermal Energy ◽  
Output Voltage ◽  
Charge Pump ◽  
Input Voltage ◽  
Fully Integrated ◽  
Input Capacitance ◽  
Low Input ◽  
Lc Oscillator ◽  
Thermal Energy Harvesting

A fully-integrated self-startup circuit with ultra-low voltage for thermal energy harvesting is presented in this paper. The converter is composed of an enhanced swing LC oscillator and a charge pump with decreased equivalent input capacitance. The LC oscillator has ultra-low input voltage and high output voltage swing, and the charge pump has a fast charging speed and small equivalent input capacitance. This circuit is designed with 0.18[Formula: see text][Formula: see text]m standard CMOS process. The simulation results show that the output voltage is in the range of 0.14[Formula: see text]V and 2.97[Formula: see text]V when the input voltage is changed from 50[Formula: see text]mV to 150[Formula: see text]mV. The output voltage could reach 2.87[Formula: see text]V at the input voltage of 150[Formula: see text]mV and the load of 1[Formula: see text]M[Formula: see text]. The maximum efficiency is in the range of 10.0% and 14.8% when the input voltage is changed from 0.2[Formula: see text]V to 0.4[Formula: see text]V. The circuit is suitable for thermoelectric energy harvesting to start with ultra-low input voltage.

scholarly journals Efficiency Enhancement of Flexible Mode Bridgeless Boost Rectifier

2019 ◽  
Vol 9 (2) ◽  
pp. 1503-1508
Keyword(s):  
Power System ◽  
Input Voltage ◽  
Efficiency Enhancement ◽  
Fast Recovery ◽  
High Input ◽  
Voltage Range ◽  
Low Input ◽  
Flexible Mode ◽  
Simulation Results ◽  
Boost Rectifier

Most of the devices in power system become faulty due to the large content of harmonics present in voltage and current. It is mainly caused by the conduction losses in the system. At first, it is necessary to determine the extent of harmonic present by calculating the total harmonic distortions i.e., root over sum of the integral harmonics divide by fundamental harmonic. Later, identification of type of method for reducing harmonics is essential. In this project we are mainly focusing on two types of PFC bridge boost rectifier to improve the efficiency for low and high input voltage range. It using back to back bridgeless PFC boost rectifier for high input voltage and for low input voltage range, three level bridgeless boost rectifiers respectively. Fast recovery diode instead of normal diodes for better reliability and efficiency is utilized. The end model is obtained by combining two circuits BTBBL (Back to back bridgeless boost PFC) and TLBL (Three level bridgeless boost PFC) to get the FMBL (Flexible mode bridgeless boost PFC). Due to presence of less no of components, conduction losses are less hence less distortion is observed with improved efficiency. A simulation is carried out for all three models using MATLAB Simulink platform. In hardware, TLP250 driver for MOSFET is used and which is interfaced with PIC microcontroller. The hardware results are obtained that validates the simulation results.

scholarly journals High gain boost converter with modified voltage multiplier for stand alone PV system

2019 ◽  
Vol 14 (1) ◽  
pp. 185
Author(s):  
Getzial Anbu Mani ◽  
A. K. Parvathy
Keyword(s):  
High Efficiency ◽  
Input Voltage ◽  
High Gain ◽  
Boost Converter ◽  
Pv System ◽  
Boost Converters ◽  
Low Input ◽  
Voltage Multiplier ◽  
Photo Voltaic ◽  
Current Ripple

<p>Boost converters of high gain are used for photo voltaic systems to obtain high efficiency. These high gain Boost converters gives increased output voltage for a low input produces high outputs for low input voltage. The High gain boost converters have the following merits. Conduction losses input current ripple and stress across the switches is reduced while the efficiency is increases. The high gain of the converters with the above said merits is obtained by changing the duty cycle of switches accordingly .In this paper a boost converter working with interleaved concept along with a additional Nstage voltage Multiplier has been carried out by simulation using MATLAB/ simulink and the mathematical modeling of various parameters is also done.</p>

scholarly journals Novel CMOS Bulk-driven Charge Pump for Ultra Low Input Voltage

2016 ◽  
Vol 25 (2) ◽  
pp. 321-331 ◽  
Author(s):  
G. Nagy ◽  
D. Arbet ◽  
V. Stopjakova ◽  
M. Kovac
Keyword(s):  
Charge Pump ◽  
Input Voltage ◽  
Low Input

scholarly journals Hybrid Fuzzy Based MPPT Techniques for Maximum Power Extraction

2019 ◽  
Vol 8 (2S8) ◽  
pp. 1140-1148
Keyword(s):  
Maximum Power ◽  
Photovoltaic System ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Pv System ◽  
Power Extraction ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Incremental Conductance ◽  
Power Point

The extensive usage of solar has extended the opportunity of research to increase the efficiency of PV module. Maximum Power Point Tracking technique plays an important role. In P & O and Incremental conductance the power produced is less. In this paper a Fuzzy based P & O and Fuzzy based Incremental Conductance MPPT techniques are presented to extract the maximum power from the photovoltaic system by considering the dynamic variation in irradiations and temperature also. Here the 100 kW PV array is considered and it is connected to the utility grid via a DC-DC boost converter of 500volts with a 3 phase three level voltage source converter. The result is obtained by the MAT LAB Simulink and the same is appraised with the traditional P & O and Incremental conductance. The PV System produces the maximum power by the application of Fuzzy based incremental Technique compared to conventional methods.

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