Grounding device of variable frequency motor

The invention relates to the field of variable frequency motors, and discloses a grounding device of a variable frequency motor, which comprises a connecting ring, a supporting rod and a grounding assembly used for grounding a rotating shaft of the variable frequency motor. The connecting ring is located on the outer ring of the rotating shaft of the variable frequency motor, and the supporting rod is used for connecting the connecting ring with the rotating shaft. The connecting ring and the supporting rod are both made of insulating materials, the grounding assembly comprises a grounding rod and a first grounding wire, the grounding rod is connected with the connecting ring, a contact head is arranged at the end, facing the rotating shaft, of the grounding rod, the contact head abuts against the outer side of the rotating shaft, and the grounding rod is connected with the first grounding wire. When the variable frequency motor works, the grounding rod and the rotating shaft are kept relatively static, the p