Separate Motor Generator (electric traction machine)
The design of the Separated Motor Generator (SMG) offers great advantages over other concepts.
Because of the higher transmission ratios or rotation speeds that can be realized, this concept leads to smaller and lighter drive motors by comparison with the Integrated Motor Generator (IMG).
Today two basic sizes of motor diameter are available to take account of varying installation situations. Torque or power capacity is basically scaled via the active motor length.