Detection device and detection system for soft starter

Abstract

The invention relates to a detection device and a detection system for a soft starter. The detection device comprises a current acquisition unit and a controller, wherein the current acquisition unitis connected to the input end of a silicon controlled rectifier of the soft starter and is used for acquiring the current value of alternating current when the current value of the alternating currentprovided to the input end of the silicon controlled rectifier is greater than the rated current of the silicon controlled rectifier; and the controller is connected to the current acquisition unit and is used for receiving the current value acquired by the current acquisition unit, determining the duration of the alternating current under the current value and determining whether the silicon controlled rectifier is damaged or not according to the current value and the duration. According to the invention, the problems that the to-be-exhausted service life of the soft starter cannot be predicted in time and the damaged soft starter cannot be replaced in time are solved, and the service life of the silicon controlled rectifier can be accurately determined.

Description

technical field [0001] The invention relates to the field of electrical technology. Specifically, the present invention relates to a detection device and a detection system of a soft starter. Background technique [0002] A soft starter is a device that controls the transmission of voltage and current from an AC (alternating current) power source to an induction motor. Soft starters are configured to limit the transient voltage and current to an induction motor during starting, producing a "soft" motor start. In operation, power from the AC source passes through a switching device in the soft starter, such as a pair of anti-parallel solid state switches in the form of silicon controlled rectifiers (SCRs), to control current flow and in turn control the terminal voltage of the induction motor. [0003] As mentioned above, the soft starter plays a very important role in the process of motor driving, therefore, it is extremely critical to keep the soft starter in good working...

AI Technical Summary

Problems solved by technology

[0008] The embodiment of the present invention provides a detection device and a detection system of a soft starter to at least solve the problem of not being able to accurately and reliably determine whether the silicon-controlled rectifier is damaged, and whether the service life of the silicon-controlled rectifier has been shortened, so that the controllable rectifier cannot be predicted The Remaining Lifetime Problem of Silicon Rectifiers

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