Power supply device for demagnetizer

Abstract

The invention discloses a power supply device for demagnetizer, which comprises an inverter, a rectifier circuit, a capacitor and a switching circuit; the power supply input end of the inverter is connected with a low voltage dc power supply, and the high voltage ac power supply output end thereof is connected with the ac power supply input end of the rectifier circuit; the inverter is used for inverting low voltage dc into high voltage ac for demagnetization; the anode of the capacitor is connected or disconnected with the anode of a high voltage pulse dc power supply output by the rectifier circuit through the switching circuit; the cathode of the capacitor is connected with the cathode of the high voltage pulse dc power supply output by rectifier circuit; meanwhile, the anode of the capacitor is disconnected or connected with the anode output end of the power supply device through the switching circuit; the cathode of the capacitor is also connected with the cathode output end of the power supply device. As the work power supply of the invention is a low voltage dc power supply, the power supply device can invert the low voltage dc into high voltage ac for demagnetization; thereby, when the power supply device for demagnetizer is mounted on a demagnetizer, the demagnetizer is ensured to operate in any working environment.

Description

technical field [0001] The invention relates to a power supply device, in particular to a power supply device used in a degausser. Background technique [0002] Various magnetic recording media such as hard disks, magnetic disks, magnetic tapes, magnetic cards, etc. are widely used to store information. For government departments, the military, high-tech departments, financial and other units, the information (data) stored on the magnetic recording medium basically belongs to confidential information and cannot be discarded at will. Information stored on them must be destroyed before they are discarded to ensure national information security. [0003] At present, people mainly destroy the information stored in the magnetic recording medium through the magnetic destruction method. The magnetic destruction method mainly uses a strong magnetic field to destroy the arrangement direction of the NS poles of the magnetic crystal particles on the surface of the magnetic recording ...

AI Technical Summary

Problems solved by technology

[0005] The device disclosed in the above patent can well achieve the purpose of erasing the information in the magnetic storage medium, but the application of this patent has certain limitations, that is, it is required that the site of use must be able to provide AC 220V or 380V power, otherwise, the device cannot work normally

Images