电机的绝缘,直接影响到电机的性能和它的长期可靠运行,因此在设计电机时,绝缘结构选用的合理与否是评价电机的一项重要指标。目前国外各先进国家,同步主发电机的绝缘结构均采用 F 级或 H 级,这种绝缘结构性能良好,运用可靠。我国在七十年代初设计的TQFR—3000型同步主发电机采用的绝缘等级,转子为 H 级,定子为 B 级,这种绝缘结构经十几年的运用实践表明,它尚能满足机车可 Motor insulation, a direct impact on the performance of the motor and its long-term reliable operation, so the design of the motor, the selection of the insulation structure is reasonable or not to evaluate the motor is an important indicator. At present, foreign advanced countries, synchronous main generator insulation structure using F-class or H-class, the insulation structure of good performance, the use of reliable. China in the early seventies designed TQFR-3000-type synchronous generator used in the insulation level, the rotor is H-class, B-class stator, this insulation structure after more than 10 years of practice shows that it can still meet the locomotive can