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A mppt online control system based on a new open circuit voltage method

A technology of open-circuit voltage method and control system, which is applied in the direction of control/regulation system, electrical components, and adjustment of electrical variables, etc., which can solve the problems of low thermoelectric conversion efficiency and difficult temperature measurement, so as to improve thermoelectric conversion efficiency and improve MPPT converter , the effect of reducing power loss

Active Publication Date: 2020-06-09
JIANGSU UNIV
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Problems solved by technology

[0005] The present invention aims at the disadvantages of low thermoelectric conversion efficiency and difficulty in temperature measurement in the utilization process of existing automobile exhaust waste heat, and provides an MPPT online control system based on a new open-circuit voltage method

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  • A mppt online control system based on a new open circuit voltage method
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  • A mppt online control system based on a new open circuit voltage method

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Embodiment Construction

[0020] In order to make the operation process and creative features of the present invention easy to understand, the present invention will be further described in detail below in conjunction with the description of the drawings and specific implementation methods.

[0021] like figure 1 As shown, a MPPT online control system based on a new open circuit voltage method, the system includes a thermoelectric power generation unit, a thermocouple group, an MPPT converter 5 and a load 6, and a thermoelectric power generation unit includes a number of thermoelectric power generation chips 4 connected in series and cylindrical A pair of strong magnets 3, a pair of strong magnets 3 are located on both sides of the cold end and hot end of the outermost thermoelectric power generation sheet 4, and then placed on the engine exhaust pipe side and the cooling water pipe side respectively, and the strong magnets 3 clamp the temperature difference The power generation piece 4 and the thermoc...

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Abstract

The invention discloses an MPPT online control system based on new open-circuit voltage method, which includes a thermoelectric generating set, a thermocouple set and an MPPT converter. The thermoelectric generating set consists of several thermoelectric generating plates and strong magnets, suitable for converting heat energy in exhaust gasses into electric energy. The thermocouple set consists of a thermocouple detecting plate and a thermocouple card slot, suitable for measuring the temperature between thermoelectric generating plates and transmitting the temperature signal to the MPPT converter. The MPPT converter consists of a ring antenna, a Freescale MC9S12XS128 MCU and a boost inverter, and its two terminals are connected with the temperature difference generator and the load respectively thus to output the voltage generated by the temperature difference generator to the load with the maximum power. The invention can effectively solve the problem of fixing the thermocouple whenmeasuring the temperature difference of thermoelectric generating plates, and further overcomes the shortcomings of the traditional open circuit voltage method, such as periodic circuit disconnection,complex algorithm and large power loss. So, the invention can help keep output voltage running continuously near the maximum power point, thereby improving the thermoelectric conversion efficiency ofthe thermoelectric generating set.

Description

technical field [0001] The invention relates to the fields of temperature measurement technology and waste heat utilization of automobile exhaust, in particular to an MPPT online control system based on a novel open-circuit voltage method. Background technique [0002] In recent years, the shortage of fossil fuels has placed higher demands on the energy efficiency of engines. During the working process of the automobile engine, about 30%-40% of the energy is discharged into the atmosphere with the exhaust gas. The thermoelectric power generation technology can recover the waste heat in the automobile exhaust gas and convert it directly into electrical energy. This technology has the advantages of portability, reliability, and long life. However, due to changes in engine operating conditions and the properties of thermoelectric power generation materials, the output voltage fluctuates greatly and the efficiency is low. [0003] The maximum power point tracking (Maximum Power...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/67H02N11/00
CPCG05F1/67H02N11/002
Inventor 王军李幸军宋想想曹培国
Owner JIANGSU UNIV
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