[关键词]
[摘要]
高压电机的定子通常采用成型绕组,同时需配套开口槽,导致电机成本增加、气隙磁场谐波含量增大、齿槽转矩增大等一系列问题。为了解决上述问题,可以采用散嵌圆铜线绕组。对于高压电机采用散绕组,绝缘问题是关注和研究的重点。以1台高压散绕组电机为例,利用有限元法分析了高压电机采用散绕组的绝缘结构可靠性,分别分析了匝间绝缘、主绝缘、层间绝缘和端部绝缘的绝缘情况以及主绝缘被冲片毛刺划伤情况下的电场强度分布,并根据分析结果针对电机槽内绝缘做出了优化,制造了1台样机并对样机进行了耐电压试验。验证了高压电机定子采用散绕组在一定程度上是可行的,为高压电机定子绝缘结构设计提供了参考。
[Key word]
[Abstract]
At present, formed winding is usually used on high-voltage motor stator with open slots matched, which leads to a series of problems such as increasing motor cost, increasing air gap magnetic field harmonic content, and increasing cogging torque. The above problems can be solved by using scattered round copper wire winding. The insulation of scattered windings used in high-voltage motors is the focus of attention and research. Taking a high-voltage scattered winding motor as an example, the reliability of the insulation structure of the high-voltage motor using scattered windings is analyzed by finite element method. The insulation conditions of the turn-to-turn insulation, the main insulation, the interlayer insulation and the end insulation, and the electric field intensity distribution when the main insulation is scratched by the burrs of steel sheet are analyzed respectively. According to the analysis results, the insulation in the motor slot is optimized. A prototype is manufactured and a voltage withstand test is conducted on the prototype. It is verified that the use of scattered windings in the stator of high-voltage motor is feasible to a certain extent, which provides a reference for the design of the stator insulation structure of the high-voltage motor.
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