What are the three structural types of hybrid electric vehicles?

[MacBrynlee]

Hybrid electric vehicles are divided into the following three structural types: 1. Series hybrid electric vehicles: These primarily consist of three major powertrain components - an engine, a generator, and a traction motor - connected in series to form the HEV power system. 2. Parallel hybrid electric vehicles: Both the engine and generator serve as powertrain components in this configuration, where the power outputs from these two major powertrains can either be combined or operate independently. 3. Power-split hybrid electric vehicles: These integrate the structures of both series and parallel hybrids, forming an electric vehicle that primarily consists of three major powertrain components - an engine, a motor-generator, and a traction motor.