针对传统同步方法控制下双牵引电机同步运行所出现的问题,提出了频率相对值跟随的方法.通过设置前后牵引变频器的正反向运行的增益、使用指令指定切换端口,使前牵引电机跟随后牵引电机.对比新的跟随速差法和传统的固定速差法,新的跟随控制方法克服了开关过程中的不平滑和两牵引电机间电缆上张力突变的不足,在高、中、低速档中表现出良好的动态性能.该方法提高了产品的质量,增强了系统的灵活性,提升了设备的生产效率,具有借鉴和推广意义.%To solve the problems that appear in traditional synchronous control system for double traction motors, the method of following up control with frequency relative value is put forward. Through setting the gains of the forward and reverse running of the inverter for front and rear traction;and applying instructions to specify the switching port, to make the front traction motor follows the rear traction motor. The new following up control method is compared with traditional control method, the new method overcomes the deficiencies of unsmooth switching process and the mutation of the tension of the cable between two traction motors;good dynamic performance is shown at high, medium and low speed status. This method improves the quality of products, enhances the flexibility of system, and improves the production efficiency of the equipment;it has the reference and the promotion significance.
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