Traction motor refers to the motor used for traction on railway trunk electric locomotives, industrial and mining electric locomotives, electric drive diesel locomotives and various electric vehicles (such as battery vehicles, urban trams, and underground railway electric vehicles). Traction motors include traction motors, traction generators, auxiliary motors, and the like. With the increasing maturity of AC variable frequency speed regulation technology, stable and reliable stepless speed regulation of AC traction motors can be performed, and the speed regulation range can reach 1:1000, which is larger than that of DC speed regulation, especially with DC motor replacement. the presence of the device.
With the rapid development of my country's railway traction power revolution, more and more DC traction motors will be put into use. Commutator and brush device are important and special components of DC motor. When they are in working state, they have a direct impact on the reliability and maintenance workload of the motor.
Due to the limitation of manual installation of traction motor, its electromagnetic load, mechanical load and thermal load are relatively high; coupled with strong vibration and shock from the line, harsh environmental conditions (dust, moisture, grease), the load often changes greatly, requiring Overload and deep field weakening, among other conditions, make the operation of the commutator and brush arrangements in traction motors difficult.