Power supply method for actively judging power demand

Abstract

The invention provides a power supply method for actively judging the power demand. A power supply device comprises a power supply unit, a power supply controller, a switch unit, a first impedance detector and a second impedance detector. The method comprises the steps that when the power supply device disengages from a load device, the switch unit of the power supply device is turned off; the power supply device is connected to the load device; whether the voltage of a triggering signal of a cascading contact of the first impedance detector and the second impedance detector is larger than the preset voltage or not is judged, and if yes, the switch unit is turned on; whether the voltage of the triggering signal is kept to be larger than the preset voltage or not is judged, and if not, the switch unit is turned off, and the first step is executed. Thus, the power demand of the load device can be actively judged, electric power can be supplied, the electric power cannot be supplied when the electric power is not in the preset power supply range, and then the power supply device and the load device can be protected.

Description

technical field [0001] The invention relates to a power supply method, in particular, it can actively judge the power demand required by a load device and provide power. Background technique [0002] Different electrical products have different electrical characteristics, so they need appropriate power to operate. For example, air conditioners with high power consumption need 220V, while electric fans with low power consumption can be driven by 110V mains power. If the air conditioner uses 110V mains power, it will not start, and if the electric fan is plugged into a 220V power supply, it may burn out. However, it is easy for ordinary users to ignore the characteristics of the socket power supply, which often leads to damage to electrical products. [0003] In addition, for electrical or electronic products that require lower voltages to operate, such as small electric motors that require 12V and 1A, mobile phones that require 5V and 0.5A for charging, or flashlights that r...

AI Technical Summary

Problems solved by technology

[0004] However, the marked voltage and current values ​​are usually not obvious or the font is too small to achieve the purpose of reminding users. Moreover, the appearance of power conditioners is not much different, so it is difficult for users to use the correct power supply among many power conditioners. Regulators, even common power regulators, are easy to mistake

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