Frequency conversion electric motor grounding device

Abstract

The invention relates to a grounding device of a variable-frequency motor which belongs to a motor grounding device in particular. The device is characterized in that the device includes a bearing component, a carbon brush device, a brush frame cover and a rotary shaft; the rotary shaft is mounted in the brush frame cover and is supported by the bearing component; the carbon brush device is fixed on the bearing component through a bolt; the brush frame cover is fixed on the bearing component through a bolt; the carbon brush device includes a down-lead, a carbon brush frame, a bolt, black lead and a brush frame mounting plate; the carbon brush is fixed on the brush frame mounting plate through the bolt; the black lead is connected with the brush frame mounting plate; the down-lead is connected with the brush frame mounting plate through the bolt. The invention has a simple, compact and reasonable structure; the damage of a shaft circuit to the bearing and the rotary shaft can be great reduced; the service life of the motor can be prolonged, and the potential difference between the inner ring and the outer ring of the bearing can be removed.

Description

technical field [0001] The invention relates to a frequency conversion motor grounding device, in particular, it belongs to the motor grounding equipment. Background technique [0002] With the rapid development of AC speed control technology, the price of frequency converter is continuously reduced and the performance is continuously improved. The application of AC frequency conversion motor is more and more extensive. The frequency conversion speed control system of induction motor has a tendency to replace the speed control system of DC motor. But at the same time, the problem of abnormal bearing damage caused by variable frequency motor shaft current has become increasingly prominent, seriously damaging the motor shaft and bearings, directly leading to equipment failure and causing huge losses. At present, most manufacturers use insulated bearings to deal with shaft currents, but insulated bearings are basically imported, expensive, and the procurement cycle is long, whi...

AI Technical Summary

Problems solved by technology

But at the same time, the problem of abnormal bearing damage caused by variable frequency motor shaft current has become increasingly prominent, seriously damaging the motor shaft and bearings, directly leading to equipment failure and causing huge losses

At present, most manufacturers use insulated bearings to deal with shaft currents, but insulated bearings are basically imported, expensive, and the procurement cycle is long, which is not conducive to production and reduces production efficiency.

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