Evaluation of multi MPPT thermoelectric generator system

Nagayoshi, Hiroshi; Tokumisu, K.; Kajikawa, Takenobu

doi:10.1109/ict.2007.4569487

Cited by 14 publications

(16 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The circuit was 80% efficient. Nagayoshi et al [10] later compared the output power with and without the maximum power point trackers. Two experimental rigs were set up.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Battery charging considerations in small scale electricity generation from a thermoelectric module

et al. 2014

View full text Add to dashboard Cite

This project involves the development of a prototype electrical generator for delivering and storing small amounts of electricity. Power is generated using the thermoelectric effect. A single thermoelectric generator (TEG) is utilised to convert a small portion of the heat flowing through it to electricity. The electricity produced is used to charge a single rechargeable 3.3 Volt lithium-iron phosphate battery. This study investigates methods of delivering maximum power to the battery for a range of temperature gradients across the thermoelectric module. The paper explores load matching and maximum power point tracking techniques. It was found that, for the TEG tested, a SEPIC DC-DC converter was only beneficial for temperature gradients less than 100 ⁰C across the TEG. At a temperature gradient of 150 ⁰C, the effective resistance of the battery was close to the internal resistance of the TEG. For temperature gradients in excess of 100°C a DC-DC converter is not suggested and a simple charge protection circuit is sufficient.

show abstract

“…The circuit was 80% efficient. Nagayoshi et al [10] later compared the output power with and without the maximum power point trackers. Two experimental rigs were set up.…”

Section: Introductionmentioning

confidence: 99%

“…In the second rig, maximum power point trackers were placed on each string of TEGs. Nagayoshi et al [10] compared the output power of each system with a range of load resistances. When a load of 5 Ω was applied, direct charging delivered more power than the MPPT method for the string of TEGs held at 70 °C and 100 °C.…”

Section: Introductionmentioning

confidence: 99%

Battery charging considerations in small scale electricity generation from a thermoelectric module

et al. 2014

View full text Add to dashboard Cite

show abstract

“…However, mismatches among TEMs are inherent due to temperature distribution imbalance, manufacturing tolerances, and aging; hence, simultaneous maximization of the output power of each TEM by centralized maximum power point tracking (MPPT) control is difficult [7], [8]. An effective method for maximizing the output power of the distributed TEG system is to adopt an independent DC-DC converter for each TEM [3], as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

A Novel Dual-Input Boost-Buck Converter with Coupled Inductors for Distributed Thermoelectric Generation Systems

Wu¹,

Sun²,

Xing³

et al. 2015

Journal of Power Electronics

View full text Add to dashboard Cite

A dual-input boost-buck converter with coupled inductors (DIBBC-CI) is proposed as a thermoelectric generator (TEG) power conditioner with a wide input voltage range. The DIBBC-CI is built by cascading two boost cells and a buck cell with shared inverse coupled filter inductors. Low current ripple on both sides of the TEG and the battery are achieved. Reduced size and power losses of the filter inductors are benefited from the DC magnetic flux cancellation in the inductor core, leading to high efficiency and high power density. The operational principle, impact of coupled inductors, and design considerations for the proposed converter are analyzed in detail. Distributed maximum power point tracking, battery charging, and output control are implemented using a competitive logic to ensure seamless switching among operational modes. Both the simulation and experimental results verify the feasibility of the proposed topology and control.

show abstract

“…Several well-known MPPT algorithms such as perturbation and observation (P&O), incremental conductance, and approach using TEG characteristics (impedance matching) have been applied in TEG [5], [7], [10]1 1- [12]. In literatures [5], [10]- [12], the implementations of the MPPT algorithms require the micro-controller circuit to compute either the power or impedance. Hence these implementations require the voltage and current feedback from either/both TEG (input) or/and load/battery (output).…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, the constant impedance (approach using characteristics of TEG) matching MPPT circuit for low power thermoelectric energy harvester system is presented. Unlike the traditional TEG MPPT methods implemented in [5], [10]- [12], the implementation of the proposed MPPT method does not require any micro-controller to compute either power or impedance. Hence, it also does not require the voltage or current feedbacks from either input or output side to perform the MPPT.…”

Section: Introductionmentioning

confidence: 99%

An optimized MPPT circuit for thermoelectric energy harvester for low power applications

Win

Dasgupta

Panda

2011

8th International Conference on Power Electronics - ECCE Asia

View full text Add to dashboard Cite

A novel approach of maximum power point tracking (MPPT) control method for thermoelectric generator (TEG) is reported in this paper. The maximum power point tracking is achieved by using impedance matching principle. Unlike the existing MPPT methods, the proposed implementation does not require any voltage and current sensors and computations of any nature. The implementation of the MPPT control circuit is carried out using buck-boost DC/DC converter and a simple gating signal generator using only one Op-amp. The proposed method needs the least power consumption of the MPPT control circuit -less than 250 W. Experimental tests results obtained from series connected 3xTEGs (24 mm x 6 mm) show an average power harvesting of 5.6mW at T of 24 o C. The proposed thermoelectric energy harvester is used to power a battery which subsequently feeds a sensor node. The low power thermoelectric energy harvester system provides an overall power management circuit efficiency of up to 85%. The efficiency calculation takes care of power losses in the MPPT circuit. Index Terms-Low power thermoelectric energy harvesting circuit, High performance MPPT control, Constant impedance matching MPPT control circuit, Ultra-low power MPPT circuit for TEG.

show abstract

Evaluation of multi MPPT thermoelectric generator system

Cited by 14 publications

References 0 publications

Battery charging considerations in small scale electricity generation from a thermoelectric module

Battery charging considerations in small scale electricity generation from a thermoelectric module

A Novel Dual-Input Boost-Buck Converter with Coupled Inductors for Distributed Thermoelectric Generation Systems

An optimized MPPT circuit for thermoelectric energy harvester for low power applications

Contact Info

Product

Resources

About