2results about How to "Reduce shaft voltage" patented technology

The application relates to the field of generator set operation and maintenance, and provides a large shaft grounding device, which comprises a fixing tool, a grounding wire, a constant-voltage loading mechanism and a grounding shoe. The grounding shoe comprises a conductive base layer and a low-contact-resistance layer which are sequentially stacked. The conductive base layer is connected with the grounding wire. The constant-voltage loading mechanism is connected between the fixing tool and the conductive base layer. The side surface of the low-contact-resistance layer opposite to the conductive base layer is an arc surface and is used for abutting against the surface of the large shaft. Based on the above structure, the electrostatic charge of the large shaft can be preferentially led away through the path of the low-contact-resistance layer, the conductive base layer and the grounding wire, the grounding effect of the large shaft grounding device on the large shaft can be effectively improved, the charge leading effect of the large shaft grounding device can be effectively improved, the accumulation of electrostatic charge to form a suspended potential can be effectively and reliably hindered, the shaft voltage can be reduced, the risk of the breakdown discharge phenomenon can be reduced, and the risk of the electric corrosion of the bearing caused by the current passing through the bearing can be reduced.

The invention discloses a motor, motor rotor end rings and a motor rotor, and relates to the technical field of motor driving, the motor comprises a rotor iron core and a stator iron core, and the two ends of the rotor iron core are provided with the rotor end rings; the stator iron core is located on the outer side of the rotor iron core, the stator iron core is provided with a stator winding, and the end portion of the stator winding is located on the outer side of the rotor end ring; the rotor end ring is at least divided into a first section and a second section along the axial direction, the first section is arranged close to the rotor core, and the radial length from the second section to the stator winding is greater than the length from the first section to the stator winding. By increasing the radial distance between the rotor end ring and the stator winding, the stray capacitance in the motor is optimized, the common-mode voltage division ratio of the inner and outer rings of the bearing is reduced, the structure is simplified, the occupied space of the motor is reduced, and the power density is improved.