Method for improving safety and energy-efficient performance of civilian electrical appliance, and civilian DC power supply system

Abstract

The invention discloses a method for improving the safety and energy-efficient performance of a civilian electrical appliance, and an energy-efficient civilian DC power supply system. The power supply system comprises a DC power supply device, a constant voltage/current circuit, a DC load, an automatic load detection circuit and a control module, wherein the output end of the DC power supply system is connected with the input end of the constant voltage/current circuit; the output end of the constant voltage/current circuit is connected with the DC load; the automatic load detection circuit carries out real-time sampling on the voltage and/or current of the DC load and inputs sampling signals to the control module; the control module judges the load change of the DC load according to the input sampling signals and outputs PWM pulse signals to the constant voltage/current circuit according to the judgment results; and the constant voltage/current circuit adjusts the output power into an output power meeting the DC load requirement according to the received PWM pulse signals. The method and the system have the advantages of energy saving, safety, wire rod saving and low cost.

Description

technical field [0001] The invention relates to a method for improving the safety and energy-saving performance of civil electrical appliances, and an energy-saving civil direct current power supply system that can adjust the output power according to the size of the load. Background technique [0002] With the continuous development of society, saving energy and improving the safety performance of electrical equipment are important measures to improve energy utilization efficiency and economic benefits, protect resources and the environment, and ensure the safety of human life. At present, the vast majority of civilian electrical appliances seem to use AC power, but in fact they all work with DC. After civilian electrical appliances, such as computers, televisions, refrigerators, and LED lighting, which are now being vigorously promoted, will be converted into direct current by separate AC / DC circuits in civilian electrical appliances for use by these civilian electrical ap...

AI Technical Summary

Problems solved by technology

This power supply mode has the following problems. First, it consumes a lot of energy. Second, it is not safe. Third, users seem to be overburdened when they first purchase.

Imagine, if in order to solve the above problems, whether it is possible to add a total DC conversion circuit and a total constant current constant voltage circuit in front of all household appliances (ie DC loads) that work with DC to provide DC power for all household appliances (ie DC loads) Well, it is obviously possible, but this kind of DC power supply mode exists when the load value of civilian appliances (that is, DC load) changes (such as the load becomes larger or smaller), it will cause the total DC conversion circuit and the total constant The current and constant voltage circuit cannot be balanced with the total DC load, which will seriously affect the service life of civilian electrical appliances (ie DC loads)

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