.Modelica.Electrical.Machines.Examples.DCMachines.DCPM_Cooling

Information

Test example: Demonstrate cooling of a DCPM motor
The motor starts at no-load speed, then load pulses are applied.
The cooling circuit consists of armature's thermal capacitance, a thermal conductance between armature and core, core's thermal capacitance and a thermal conductance between core and coolant. The coolant flow circuit consists of inlet, volume flow, a pipe connected to the core and the outlet.
Please note:

All unused heat ports of the thermal port (i.e., without loss sources in the machine: brush, stray, friction, permanent magnet) have to be connected to a constant temperature source.
The thermal capacitances (i.e., time constants) are unusual small to provide short simulation time!
The coolant is a theoretical coolant with specific mass = 1 kg/m3 and cp = 1 J/kg.K.
The thermal conductances as well as the coolant flow are parametrized such way, that:

the total coolant's temperature rise is 10 K (over coolant inlet)
the core's temperature rise is 27.5 K (over coolant's average temperature between inlet and outlet)
the armature's temperature rise is 55 K (over coolant's average temperature between inlet and outlet)

Simulate for 25 seconds and plot (versus time):

armature.T: armature temperature
core.T: core temperature
cooling.T: coolant temperature at outlet

Therefore the armature temperature would reach nominal armature temperature at constant nominal load.
Default machine parameters are used, but:

The armature winding material is set to Copper.
Armature reference temperature is set to 80 degC.
Nominal armature temperature is set to 80 degC.

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