Program-controlled electronic load device with compensating power supply

Abstract

The invention relates to a program-controlled electronic load device with a compensating power supply. A conventional electronic load device has the defects of low resolution and low automation level. In the invention, a microprocessor module is connected with a first D / A (Digital / Analog) conversion module, an electronic load regulation module and an electronic load output module to form a program-controllable electronic load, and the microprocessor module is connected with a second D / A conversion module, a compensating power supply regulation module, a compensating power supply output moduleand an A / D (Analog / Digital) conversion module to form a closed-loop program-controllable electronic load compensating power supply. The microprocessor module is connected with a serial communication module to realize communication with an upper computer and other CPUs (Central Processing Units). By utilizing a Darlington transistor with the characteristics of high response speed, good stability, small power consumption, low noise and long service life, the invention realizes the electronic load device with the compensating power supply, which is free from mechanical contacts and moving parts and has the characteristics of fast response, high sensitivity, low noise, long service life and reliable performance.

Description

technical field [0001] The invention belongs to the technical field of electronic detection, and relates to an electronic load device with a compensation power supply, which is mainly used for the I-V characteristic detection of solar single cells and solar battery components. Background technique [0002] Whether it is a solar cell made of crystalline silicon or a thin film material, it is necessary to test functional characteristics such as photoelectric characteristics during research and production to ensure product performance and quality, control production conditions and improve process methods, so as to achieve high production efficiency, low cost and long-term production. The purpose of life products. In the solar photovoltaic system, the most important thing is the solar cell. The output power of a single solar cell is extremely limited, and a photovoltaic array is mostly formed in a cascaded manner. This requires very high consistency in the photoelectric performa...

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Problems solved by technology

However, the resolution of the resistance value of the sliding wire rheostat is low, and it is difficult to realize automatic measurement. Therefore, a number of MOS tubes are generally used to form an electronic load, but there is a voltage drop in the measurement circuit including the electronic load. It is necessary to make the voltage at both ends of the solar cell equal to zero to measure For the short-circuit current Isc at this time, it is necessary to add a compensation power supply to the electronic load circuit to form a program-controlled electronic load device with a compensation power supply.

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