On May 21, information from the State Intellectual Property Office showed that a certain motor company applied for a patent entitled "Motor Shaft Voltage Adjustment Device, Adjustment Method, and Motor". 

The patent abstract indicates that this application relates to the field of motor technology, disclosing a motor shaft voltage adjustment device, adjustment method, and motor. The motor shaft voltage adjustment device of this application includes a conductive adjusting element disposed externally to the motor, at least a portion of which is connected to the metal surface of the motor's front end cover and/or rear end cover. This conductive adjusting element is used to change the motor shaft voltage by adjusting the parasitic capacitance between the motor end cover and the windings. By connecting the conductive adjusting element to the metal surface of the motor end cover, the shaft voltage can be effectively changed by adjusting the parasitic capacitance between the end cover and the windings without altering the internal structure of the motor. This application provides an effective means to flexibly and cost-effectively implement shaft voltage adjustment at the finished motor stage, avoiding the need to redesign the motor or adopt high-cost additional measures, significantly reducing the risk of bearing electro-corrosion, and extending the motor's service life.