End-part cooling structure for rotor winding of bipolar wound rotor motor

Abstract

The invention provides an end-part cooling structure for a rotor winding of a bipolar wound rotor motor. Rotor pressing rings are arranged at both ends of a rotor punching plate; the rotor pressing ring at one end is positioned by a shaft shoulder; the rotor pressing ring at the other end is positioned by an arc key; the arc key is placed in a shaft groove; a rotor coil is placed inside the rotor punching plate; a rotor bracket heating sleeve is arranged on a shaft; the end parts of the rotor coil are bound by weftless tapes; the thickness of each weftless tape is calculated by a centrifugal force; and the end parts of the rotor coil need to be sectionally bound in the axial direction. According to the invention, under the premise that a motor power, a power factor, the vibration and the like meet the requirements, a rotor pressing ring and rotor bracket separated structure is adopted, so that more wind energy can pass through the rotor coil, the weftless tapes are reasonably arranged, a part installation fixing and manufacturing method is also optimized and the heat dissipation condition at the end parts of the rotor winding is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a cooling structure at the end of the rotor winding of a two-pole wound motor. Background technique [0002] In the prior art, the design and manufacture of two-pole wound motors are difficult and have high technical content, and there are not many domestic manufacturers capable of producing such motors. The rated speed of the two-pole motor is close to 3000 rpm, the speed is high, the stress requirements of the material are relatively high, and there are a series of issues that need to be considered such as noise, vibration, ventilation and heat dissipation. In particular, the cooling of the end of the rotor winding has become a bottleneck restricting the design and manufacture of two-pole wound motors. Sometimes, because the rotor may overspeed, the strength of the rotor ventilation slot plate is difficult to meet without considering the friction of the air duct plat...

AI Technical Summary

Problems solved by technology

In particular, the cooling of the end of the rotor winding has become a bottleneck restricting the design and manufacture of two-pole wound motors. Sometimes, because the rotor may overspeed, the strength of the rotor ventilation slot plate is difficult to meet without considering the friction of the air duct plate. In this case, the rotor does not have air ducts, and the heat dissipation of the rotor will definitely become worse

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