Self-generating emergency power supply and constant-power charging module thereof

Abstract

The invention provides a self-generating emergency power supply and a constant-power charging module thereof. The constant-power charging module thereof comprises an input end, an output end, a high-frequency switching circuit, a current sampling flow divider, a sampling current amplifying circuit, a sampling comparison amplifying circuit and a PWM regulating controller, wherein the high-frequency switching circuit is used for adjusting the magnitude of the output current; the current sampling flow divider is arranged between the input end and the output end after being connected with the high-frequency switching circuit; the sampling current amplifying circuit amplifies the voltage on the sampling flow divider and sends the voltage to the signal input of the sampling comparison amplifying circuit after combining the voltage with the sampling voltage at the output end; the sampling comparison amplifying circuit outputs a control level to the PWM regulating controller after the voltage is amplified by comparing with a reference voltage; and the PWM regulating controller is connected with the sampling comparison amplifying circuit and the high-frequency switching circuit respectively and is used for outputting a PWM drive pulse to the high-frequency switching circuit based on the control level so as to keep the output power constant. The self-generating emergency power supply and the constant-power charging module thereof can greatly shorten the charging time of capacitive load.

Description

technical field [0001] The invention relates to the technical field of energy storage power supplies, in particular to a self-generating emergency power supply capable of constant power charging and a constant power charging module thereof. Background technique [0002] At present, the emergency power supply has been applied in many fields, and it can provide temporary emergency power supply for the equipment when the main power supply (battery) of the electrical equipment is exhausted. For example, hand-cranked generators are often supporting equipment for handheld terminals, low-power radio stations and other equipment, which can provide temporary power supply for various handheld terminals and low-power radio stations in the field. However, when a separate hand generator is in use, the crank handle of the generator must be continuously turned. Once it stops, the power supply will be interrupted, and the operation is extremely inconvenient. Therefore, two people are usuall...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a self-generating emergency power supply to solve the problem that the charging time of the existing emergency power supply is too long

[0007] Another purpose of the present invention is to provide a constant power charging scheme and actually design a constant power charging module to solve the problem of too long charging time of the existing emergency power supply

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