SS7B Electric Locomotive

Key technologies

1. The vehicle body adopts a frame-type integral load-bearing structure, double cab and double-sided corridor.

2. The axle type is Bo-Bo-Bo, consisting of three 2-axle bogies. The locomotive has a short fixed wheelbase and good curve passing performance.

3. The locomotive electrical equipment realizes cabinetization and unitization.

4. The main transformer is a shell-type integrated transformer. The body, smoothing reactor and power factor compensation reactor share the same oil tank and a forced oil circulation air cooling system.

5. The main circuit adopts a voltage regulation and rectification method in which the traction motor series excitation circuit is a fully controlled + semi-controlled two-section bridge, and the separate excitation circuit is a one-section half-controlled bridge, so as to perform stepless and smooth speed regulation on the locomotive.

6. The locomotive has an electrical compensation link for axle weight transfer and idling and sliding protection devices, and the locomotive's adhesion is well utilized.