No-load detection device and detection method for AC power supply equipment

Abstract

The invention discloses a detecting device and method for zero load of alternating power supply equipment. The detecting device comprises an inverter circuit and a direct-current power supply which supplies power to the inverter circuit, a power-storage inductor and a filter power-storage capacitor are arranged in the inverter circuit, and a switching set for controlling on-off of the circuit is further arranged in the inverter circuit; the detecting device further comprises a detecting circuit for detecting the output voltage of the inverter circuit, the detecting circuit comprises a comparator and an MCU, the comparator is provided with two input ends, one of the two input ends accesses reference voltage signals, and the other one of the two input ends accesses output voltage signals onthe filter power-storage capacitor; and the output end of the comparator is connected with the MCU, and the output end of the MCU is connected into the inverter circuit to control on-off of the switching set. The detecting device for the zero load of the alternating power supply equipment is simple, the operation is convenient, whether the power supply equipment is on-load or not can be detected,and the condition that a battery cannot be used even is scraped due to the fact that the battery in the power supply equipment is emptied is prevented.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to an AC power supply equipment no-load detection device and detection method. Background technique [0002] At present, when using power supply equipment, due to the negligence of users, when there is no external load equipment, the power supply equipment is still sending out voltage, resulting in the battery energy storage being discharged, which makes people need to use power supply equipment Sometimes, the phenomenon that it cannot be used appears, and even if the power supply equipment uses a secondary energy storage battery, it is very likely that the battery will be scrapped due to over-discharge of the battery. For this reason, how to identify whether the power supply equipment is in the no-load state and turn off the power-consuming circuit in time is of great significance to the power supply equipment. Contents of the invention [0003] The purpose of the present in...

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Problems solved by technology

[0002] At present, when using power supply equipment, due to the negligence of users, when there is no external load equipment, the power supply equipment is still sending out voltage, resulting in the battery energy storage being discharged, which makes people need to use power supply equipment When the power supply device is used, the phenomenon that it cannot be used, even if the power supply equipment uses a secondary energy storage battery, it is very likely that the battery will be scrapped due to over-discharge.

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