High-power power supply load meter

Abstract

The invention discloses a high-power power supply load meter which can switch among a constant voltage mode, a constant current mode and a constant resistance mode and can meet the detection needs of various power supplies. The high-power power supply load meter is a practical power supply load meter which can realize the load functions of various modes only by use of simple circuit and elements, can switch among the constant current state, constant voltage state and constant resistance state according to the test needs, and can perfectly meet the needs for load in the test of high-power equipment. According to the invention, an MOS (metal oxide semiconductor) tube and a manganese / copper wire resistor form a load circuit, and current precision control is performed by use of a current comparator; and the mode switch among the constant resistance mode, constant voltage mode and constant current mode can be performed by use of a group of conversion switches. The high-power power supply load meter disclosed by the invention can achieve very high current precision and stability and meet the test requirements of all equipment; in each mode, the magnitude of current, voltage and resistance is regulated by use of a multi-turn potentiometer; and moreover, when the high-power power supply load meter disclosed by the invention is in use, the working conditions of the load meter can be monitored by adding an ammeter and a voltmeter to the input end.

Description

[0001] technical field [0002] The invention discloses a power supply testing instrument, in particular to a high-power power supply load instrument. Background technique [0003] With the continuous development and progress of electronic and electrical technologies, the application of power supplies in people's daily life is becoming more and more extensive. General electronic products need to be tested after production to ensure the quality of the products shipped out of the factory. With the diversification of the types and forms of power supplies, the form of loads used to detect power supplies is becoming more and more complex. According to the power supply Depending on the type of power supply, some power supplies require a load in constant current mode during detection, some power supplies require a load in constant voltage mode during detection, and some power supplies require a load in constant resistance mode during detection. The requirements are more an...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned shortcoming that the load used for detecting power supply in the prior art does not meet the requirements of power supply detection, the present invention provides a new high-power power supply load instrument, which can be used in constant voltage, constant current, and constant resistance modes. Switching between them can meet the detection needs of various power sources

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