Abstract
This paper proposes a novel Maximum Power Point Tracking (MPPT) control method of thermoelectric power generation for the constant load. This paper reveals the characteristics and the internal resistance of thermoelectric power module (TM). Analyzing the thermoelectric power generation system with boost chopper by state space averaging method, the output voltage and current of TM are estimated by with only single current sensor. The proposed method can seek without calculating the output power of TM in this proposed method. The basic principle of the proposed MPPT control method is discussed, and then confirmed by digital computer simulation using PSIM. Simulation results demonstrate that the output voltage can track the maximum power point voltage by the proposed MPPT control method. The generated power of the TM is 0.36 W when the temperature difference is 35 °C. This is well accorded with the V-P characteristics.
Highlights
Attention is focusing on the energy harvesting technologies to electrify the small-rated electric devices by environmental energy such as waste heat energy and machine vibration
This paper proposes a novel Maximum Power Point Tracking (MPPT) control method for thermoelectric power generation system of the constant load with only single current sensor
This paper proposed a novel MPPT control method for thermoelectric power generation using the state space averaging method
Summary
Attention is focusing on the energy harvesting technologies to electrify the small-rated electric devices by environmental energy such as waste heat energy and machine vibration. It is necessary to improve the energy conversion efficiency from thermal energy to electric energy, to suppress the thermal leakage and to track the maximum power point voltage of TM. One of the MPPT control methods is the hill-climbing method, which is employed to seek the maximum power point by calculating the power with a voltage and current sensors [4]. The MPPT control method of photovoltaic power system is proposed [6] This proposed method can achieve to track the maximum power point with only a single sensor. This paper proposes a novel MPPT control method for thermoelectric power generation system of the constant load with only single current sensor. The proposed MPPT control method can achieve to track the maximum power point voltage without calculating the generated power of the TM. Simulation results demonstrate that the proposed MPPT controller can track the maximum power point perfectly
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