Direct-current bus protection device, electrical equipment and direct-current bus protection method thereof

Abstract

The invention discloses a direct-current bus protection device, electrical equipment and a direct-current bus protection method thereof. The device comprises an energy release unit and / or an energy absorption unit, wherein the energy release unit is configured to release the peak pulse voltage on the direct-current bus under the condition that the peak pulse voltage on the direct-current bus is greater than or equal to a first set voltage and less than a second set voltage; and the energy absorption unit is configured to absorb the peak pulse voltage on the direct-current bus under the condition that the peak pulse voltage on the direct-current bus is greater than or equal to the second set voltage. According to the scheme, the problem that components are damaged by instantaneous impact orinstantaneous high voltage when an electrolytic capacitor is replaced with a thin-film capacitor in a motor driving circuit can be solved, and the effect of preventing the components from being damaged by the instantaneous impact or the instantaneous high voltage is achieved.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a DC bus protection device, electrical equipment and a DC bus protection method thereof, in particular to a DC bus protection circuit of an air-conditioning system, an air-conditioning system and a DC bus protection method thereof. Background technique [0002] In the motor drive circuit, after the electrolytic capacitor with a large capacitance is replaced with a film capacitor with a small capacitance, the voltage fluctuates greatly, and the instantaneous impact or instantaneous high voltage will damage the components. [0003] The above content is only used to assist in understanding the technical solution of the present invention, and does not mean that the above content is admitted as prior art. Contents of the invention [0004] The object of the present invention is to provide a DC busbar protection device, electrical equipment and its DC busbar protection met...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a DC busbar protection device, electrical equipment and its DC busbar protection method to solve the problem that components will be damaged by instantaneous impact or instantaneous high voltage when electrolytic capacitors are replaced by film capacitors in the motor drive circuit , to avoid the effect of instantaneous impact or instantaneous high voltage damage to components

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