As of my last update in September 2021, transformers are not typically used in electric locomotives in the context of artificial intelligence or natural language processing, which is what the term "transformers" often refers to in the field of machine learning.
However, if you are referring to traditional electrical transformers used in power systems, then yes, electric locomotives do utilize transformers. Electric locomotives are powered by electricity, and the power is usually supplied through overhead lines or a third rail. The voltage from the power source may not be suitable for direct use by the locomotive's traction motors, so transformers are employed to step up or step down the voltage as needed to match the locomotive's electrical system requirements.
The use of transformers allows the locomotive to efficiently convert and utilize the electrical energy from the power source to drive the traction motors, which propel the train.
It's essential to clarify the context when discussing transformers, as the term can refer to different things in various fields of engineering and technology. In the context of electric locomotives, traditional electrical transformers are a crucial part of their electrical systems.