Enhanced motor cooling system and method

An Environmental Control System (ECS) 10 for an aircraft includes a ram air system having a ram inlet 12 and a ram outlet 28. The ECS includes a cabin air compressor motor, a diverter valve 20, and a dedicated outlet 60. The cabin air compressor motor has a motor inlet passage and a motor outlet passage with the motor inlet passage being coupled to the ram inlet. The diverter valve includes a first diverter inlet, a first diverter outlet, and a second diverter outlet. The first diverter inlet is coupled to the motor outlet passage, The dedicated outlet 60 is connected to the first diverter outlet in a flight mode of operation of the aircraft and the ram outlet 28 is connected to the second diverter outlet in a ground mode of operation of the aircraft.