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Add ability to specify whether eddy currents are enabled in the BSPM analyzer #346

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elsevers opened this issue Dec 20, 2024 · 0 comments · May be fixed by #347
Open

Add ability to specify whether eddy currents are enabled in the BSPM analyzer #346

elsevers opened this issue Dec 20, 2024 · 0 comments · May be fixed by #347
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@noguchi-takahiro

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Abstract

Add ability to specify whether eddy currents are enabled in the BSPM analyzer

Context

Currently, the BSPM analyzer has eddy currents enabled in the shaft and permanent magnets. We would like to allow the user to disable this.

Approach

Let's add a configuration setting that allows us to disable calculating eddy currents everywhere in a manner that does not break the functionality of this analyzer for existing users.

Suggested approach:

In jmag_2d_config.py

Within other settings, add a field self.enable_eddy_current_calcs to take a value of either false or true. Set it up for a default value of true (as this is what is the existing behavior)

eMach/mach_eval/analyzers/electromagnetic/bspm/jmag_2d_config.py

Lines 23 to 30 in 71f6982

# other settings
# set maximum iteration number of nonlinear calculation required until solution converges
self.max_nonlinear_iterations = kwargs["max_nonlinear_iterations"]
self.multiple_cpus = kwargs["multiple_cpus"] # True if multiple cores are required
self.num_cpus = kwargs["num_cpus"] # number of cpus or cores used. Only value if multiple_cpus = True
self.jmag_scheduler = kwargs["jmag_scheduler"] # True if it is desired to schedule jobs instead of solving immediately
self.jmag_visible = kwargs["jmag_visible"] # JMAG application visible if true
self.jmag_version = kwargs["jmag_version"] # JMAG application version

In jmag_2d.py

Within the initializer

add a check to see if the self.config.enable_eddy_current_calcs field exists. If it does not exist, create it and set it to true

eMach/mach_eval/analyzers/electromagnetic/bspm/jmag_2d.py

Lines 36 to 37 in 71f6982

def __init__(self, configuration):
self.config = configuration

Within add_material()

Only set EddyCurrentCalculation to 1 if self.config.enable_eddy_current_calcs == true

eMach/mach_eval/analyzers/electromagnetic/bspm/jmag_2d.py

Line 756 in 71f6982

study.GetMaterial("Shaft").SetValue("EddyCurrentCalculation", 1)

eMach/mach_eval/analyzers/electromagnetic/bspm/jmag_2d.py

Line 764 in 71f6982

study.GetMaterial("Magnet").SetValue("EddyCurrentCalculation", 1)

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Add option to enable or disable eddy current calculations in BSPM analyzer Severson-Group/eMach
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@elsevers @noguchi-takahiro