DC motor protector and operation method thereof

Abstract

The invention provides a DC motor protector and an operation method thereof, and relates to an emergency protection circuit device for a motor. The device comprises a signal sampling part, a control part and an execution part. Through design of operation modes of a sensor module and a signal processing module and a hybrid switch, short-circuit protection is achieved; energy signal interference is prevented; a contact loss of a mechanical switch is avoided; and prediction on the short-circuit condition can be achieved by the operation method, so that the disadvantages that an existing protector product is limited by the expansion capacity, cannot achieve the protection function in multiple energy environments, and is insufficient in stability and relatively poor in universality are overcome.

Description

technical field [0001] The technical solution of the invention relates to an emergency protection circuit device for a motor, specifically a DC motor protector and its operating method. Background technique [0002] With the development and application of new energy technology and load diversification, the low-voltage electrical appliances that undertake the control and protection tasks of electrical equipment are becoming more and more complicated. Motor protectors are one of the most important electrical products, and their performance status is directly related to the safe operation of the power system. At present, experts at home and abroad mainly focus on the protection principle of AC motor protectors, and design protectors with different functional characteristics according to the characteristics of current signals; however, with the increasing application of new energy technologies and DC power systems, existing protectors Due to the limitation of expansion ability,...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a DC motor protector and its operation method. Through the design of the operation mode of the sensor module and the signal processing module and the hybrid switch, the device realizes short-circuit protection and prevents energy signal interference, and avoids It eliminates the loss of mechanical switch contacts, and its operation method can predict the short circuit situation, thus overcoming the limitation of the expansion ability of the existing protector products, the inability to realize the protection function in a variety of energy environments, insufficient stability and versatility poor defect

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