Program-controlled adjustable load system with constant current, constant resistance, constant power and constant voltage

Abstract

The invention discloses a program-controlled adjustable constant-current, constant-resistance, constant-power and constant-voltage load system. The system comprises an MCU control circuit; the communication circuit, the digital-to-analog / analog-to-digital conversion circuit and the switching circuit are electrically connected with the MCU control circuit; the current and voltage sampling circuit is electrically connected with the digital-to-analog / analog-to-digital conversion circuit and the power load circuit; the input ends of the constant-current, constant-resistance and constant-power driving circuit and the constant-voltage driving circuit are electrically connected with the set value output end of the digital-analog / analog-digital conversion circuit; the switching circuit can enable the constant-current, constant-resistance and constant-power driving circuit to be electrically connected with the power load circuit to realize constant-current, constant-resistance or constant-power output; or the constant-voltage driving circuit is electrically connected with the power load circuit to realize constant-voltage output; the power load circuit is electrically connected with corresponding input ends of the constant-current, constant-resistance and constant-power driving circuit and the constant-voltage driving circuit; according to the invention, an accurate constant-current, constant-resistance, constant-power or constant-voltage test environment is provided; performance testing can be carried out on the power supply device more simply, quickly and reliably.

Description

technical field [0001] The invention belongs to the technical field of electronic devices, in particular to a program-controlled adjustable constant-current, constant-resistance, constant-power, and constant-voltage load system. Background technique [0002] In the field of electronic product production, it is usually necessary to test the output voltage, current, transient response, ripple noise and other performance indicators of the power supply device of electronic products, as well as the short circuit protection, overload protection, aging, life and other functions of the power supply. At present, we usually use resistors, capacitors, inductors, sliding rheostats, resistor boxes, etc., or their series and parallel combinations, as load systems to simulate real load conditions for performance experiments on power supply components. However, the load system used in the traditional test needs to be connected in series and parallel when used, the operation is complicated, ...

AI Technical Summary

Problems solved by technology

However, the load system used in the traditional test needs to be connected in series and parallel when used, the operation is complicated, the efficiency is low, and the cost is high. Different power components need to be equipped with different resistance values, and the versatility is poor; Complex load environments, such as constant current, constant voltage, constant power and constant resistance load environments

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