A series/parallel HEV powertrain system consists of a PMSM generator and converter, PMSM traction motor and converter, bi-directional dc/dc converter, lithium-ion battery, internal combustion engine, and vehicle load with the clutch. Furthermore, a generator controller and traction motor controller may include multiple control blocks, such as Maximum-Torque-Per-Ampere control, field weakening control, torque control, speed control, and voltage control.
The HEV Design Suite can handle multi-mode operations of an HEV powertrain system, such as charging mode, battery drive mode, engine and motor drive mode, engine drive with charging mode, engine and motor drive with charging mode, full power mode, and regeneration braking mode.