New thermal cooling method - Shaft cooling

A new cooling technique was implemented for all inner rotor (IR) machines currently available at FluxMotor. The shaft-cooling feature allows users to specify a cooling circuit that flows within the shaft section of the machine.
  • The flow network modelling and coupling of the shaft-cooling with the existing thermal network of the machine makes use of the integration of Altair Flow Simulator capabilities and the solver in the backend process of FluxMotor.
  • The shaft-cooling feature has an impact on the thermal and coupled solutions of the following tests in MotorFactory area:
    • Test - Characterization - Thermal - Steady State
    • Test - Characterization - Thermal - Transient
    • Test - Characterization - Thermal - Fitting (except for SM_WFISP_IR_3Ph Machines)
    • Test - Working Point - Sine wave - Working Point I-Psi-N (for SM_PM_IR_3Ph and SM_RSM_IR_3Ph Machines)
    • Test - Working Point - Sine wave - Working Point If-I-Psi-N (for SM_WFISP_IR_3Ph Machines)
    • Test - Working Point - Sine wave - Working Point U-f-N (for IM_SQ_IR_3Ph Machines)
    • Test - Performance mapping - Sine wave > Eff. map (for SM_PM_IR_3Ph, SM_RSM_IR_3Ph, and SM_WFISP_IR_3Ph Machines)
  • The configuration follows the same workflow as the Housing - Cooling feature and is illustrated below:
    Table 1. Motor Factory – Design – Shaft – Cooling Configuration Example


    1 Entry for shaft-cooling settings
    2 Shaft-cooling circuit selection:
    • None (no shaft-cooling)
    • Cooling – Hollow shaft
    • Cooling – Ring shaft
    3 Shaft-cooling circuit dimension settings:
    • Hollow shaft diameter (for hollow shaft)
    • Ring inner diameter (for ring shaft)
    • Ring outer diameter (for ring shaft)

    When a housing design is defined by users, and the Cooling – Internal section becomes available, the shaft-cooling fluidic configuration can be defined, as illustrated below:

Table 2. Motor Factory – Design – Cooling – Internal – Fluidic Configuration Example


1 Cooling circuit settings:
  • Coolant flow origin, either:
    • C.S. (connection side)
    • O.C.S. (opposite connection side)
  • Coolant flow input, either:
    • Fluid debit (L/min)
    • Fluid velocity (m/s)
    • Convection coefficient (W/K/m2)
  • Shaft-cooling roughness (mm)