The powertrain system is the core of a new energy vehicle, typically composed of key components and technologies such as the drive motor, control system, power converter, battery, and thermal management.
As one of the three core components of a new energy vehicle, the drive motor system must meet basic requirements such as high torque and power density, wide operating speed range, high system efficiency, strong environmental adaptability, good electromagnetic compatibility, and high cost-effectiveness. Common motor types include asynchronous motors, permanent magnet synchronous motors, and switched reluctance motors.
The control system is the central hub of the powertrain system. The vehicle control system (powertrain controller) of hybrid electric vehicles efficiently manages network information through a CAN bus. Currently, the control technology for permanent magnet synchronous motors mainly relies on intelligent control technology, while switched reluctance motors, due to their nonlinear characteristics, often employ fuzzy logic control and neural network control.
Common power converters in new energy vehicles include three types: AC/DC, DC/DC, and DC/AC, with DC/DC and DC/AC converters being the most widely used in the system.