As of my last update in September 2021, transformers are not typically used in electric vehicle regenerative braking systems. Regenerative braking in electric vehicles is a mechanism that allows the vehicle's electric motor to act as a generator when the vehicle is decelerating or braking. Instead of dissipating the kinetic energy as heat (as in traditional friction braking), the motor converts it back into electrical energy, which can be stored in the vehicle's battery or used to power other electrical systems.
The process of regenerative braking involves the use of power electronics, such as inverters and rectifiers, rather than transformers. These power electronics manage the flow of electrical energy between the motor/generator and the battery. They are responsible for converting the electrical energy generated during regenerative braking into a form suitable for charging the battery or powering other electrical components in the vehicle.
Transformers, on the other hand, are passive electrical devices that can be used to change the voltage level of alternating current (AC) electrical signals. They are commonly found in power distribution systems, where they step up or step down voltage levels for efficient transmission of electricity over long distances. However, in the context of electric vehicle regenerative braking, transformers are not part of the typical system design.
It's worth noting that the field of electric vehicles and related technologies is continuously evolving, and new innovations might have emerged since my last update. Therefore, I recommend consulting more recent sources or experts in the field for the latest information on electric vehicle regenerative braking systems.