From 203755918421bd1c25dbf04087c904308427071c Mon Sep 17 00:00:00 2001
From: Thomas Guillod <guillod@otvam.ch>
Date: Mon, 6 Jan 2025 21:53:26 -0500
Subject: [PATCH] add magnetic core transformer

---
 docs/content/examples.rst                     |  12 ++-
 .../examples_stl_transformer_core.png         | Bin 0 -> 8538 bytes
 .../transformer_core/geometry.yaml            |  50 ++++++++++
 .../transformer_core/problem.yaml             |  57 ++++++++++++
 .../transformer_core/stl/core.stl             | Bin 0 -> 1684 bytes
 .../transformer_core/stl/generate_stl.py      |  86 ++++++++++++++++++
 .../transformer_core/stl/pri_coil.stl         | Bin 0 -> 6284 bytes
 .../transformer_core/stl/pri_sink.stl         | Bin 0 -> 684 bytes
 .../transformer_core/stl/pri_src.stl          | Bin 0 -> 684 bytes
 .../transformer_core/stl/sec_coil.stl         | Bin 0 -> 6284 bytes
 .../transformer_core/stl/sec_sink.stl         | Bin 0 -> 684 bytes
 .../transformer_core/stl/sec_src.stl          | Bin 0 -> 684 bytes
 12 files changed, 204 insertions(+), 1 deletion(-)
 create mode 100644 docs/examples/examples_stl_transformer_core.png
 create mode 100644 examples/examples_stl/transformer_core/geometry.yaml
 create mode 100644 examples/examples_stl/transformer_core/problem.yaml
 create mode 100644 examples/examples_stl/transformer_core/stl/core.stl
 create mode 100644 examples/examples_stl/transformer_core/stl/generate_stl.py
 create mode 100644 examples/examples_stl/transformer_core/stl/pri_coil.stl
 create mode 100644 examples/examples_stl/transformer_core/stl/pri_sink.stl
 create mode 100644 examples/examples_stl/transformer_core/stl/pri_src.stl
 create mode 100644 examples/examples_stl/transformer_core/stl/sec_coil.stl
 create mode 100644 examples/examples_stl/transformer_core/stl/sec_sink.stl
 create mode 100644 examples/examples_stl/transformer_core/stl/sec_src.stl

diff --git a/docs/content/examples.rst b/docs/content/examples.rst
index 763654b3..076190b8 100644
--- a/docs/content/examples.rst
+++ b/docs/content/examples.rst
@@ -54,11 +54,21 @@ examples_stl/inductor_toroid
 
 .. image:: ../examples/examples_stl_inductor_toroid.png
 
+examples_stl/transformer_core
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+* Defined with **STL files**
+* **Transformer with two windings and a magnetic core**
+* Extraction of the **impedance matrix** from the solution
+* Example for the extraction of the impedance matrix: ``run_matrix.py``
+
+.. image:: ../examples/examples_stl_transformer_core.png
+
 examples_stl/transformer_air
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 * Defined with **STL files**
-* **Planar transformer with two windings**
+* **Planar air-core transformer with two windings**
 * Extraction of the **impedance matrix** from the solution
 * Example for the extraction of the impedance matrix: ``run_matrix.py``
 
diff --git a/docs/examples/examples_stl_transformer_core.png b/docs/examples/examples_stl_transformer_core.png
new file mode 100644
index 0000000000000000000000000000000000000000..aaffd3a9fa34c0da5b413779ffcc169ce3fd63ee
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diff --git a/examples/examples_stl/transformer_core/geometry.yaml b/examples/examples_stl/transformer_core/geometry.yaml
new file mode 100644
index 00000000..b9edb2e7
--- /dev/null
+++ b/examples/examples_stl/transformer_core/geometry.yaml
@@ -0,0 +1,50 @@
+# Definition of a "file_geometry" data.
+#
+# This file is used by the mesher.
+# Definition of the voxel structure.
+#
+# Thomas Guillod - Dartmouth College
+# Mozilla Public License Version 2.0
+
+"mesh_type": "stl"
+"data_voxelize":
+    "param":
+        "d": [1.0e-3, 1.0e-3, 1.0e-3]
+        "xyz_min": null
+        "xyz_max": null
+        "check": true
+        "tol": 1.0e-6
+        "thr": 0.5
+        "pts": 1
+    "domain_stl":
+        "core": [{"scale": 1.0e-3, "offset": [0.0, 0.0, 0.0], "filename": !path "stl/core.stl"}]
+        "pri_coil": [{"scale": 1.0e-3, "offset": [0.0, 0.0, 0.0], "filename": !path "stl/pri_coil.stl"}]
+        "pri_src": [{"scale": 1.0e-3, "offset": [0.0, 0.0, 0.0], "filename": !path "stl/pri_src.stl"}]
+        "pri_sink": [{"scale": 1.0e-3, "offset": [0.0, 0.0, 0.0], "filename": !path "stl/pri_sink.stl"}]
+        "sec_coil": [{"scale": 1.0e-3, "offset": [0.0, 0.0, 0.0], "filename": !path "stl/sec_coil.stl"}]
+        "sec_src": [{"scale": 1.0e-3, "offset": [0.0, 0.0, 0.0], "filename": !path "stl/sec_src.stl"}]
+        "sec_sink": [{"scale": 1.0e-3, "offset": [0.0, 0.0, 0.0], "filename": !path "stl/sec_sink.stl"}]
+"data_point":
+    "check_cloud": true
+    "filter_cloud": true
+    "pts_cloud": []
+"data_resampling":
+    "use_reduce": false
+    "use_resample": false
+    "resampling_factor": [1, 1, 1]
+"data_conflict":
+    "resolve_rules": true
+    "resolve_random": false
+    "conflict_rules":
+        - {"domain_resolve": ["pri_coil"], "domain_keep": ["pri_src"]}
+        - {"domain_resolve": ["pri_coil"], "domain_keep": ["pri_sink"]}
+        - {"domain_resolve": ["sec_coil"], "domain_keep": ["sec_src"]}
+        - {"domain_resolve": ["sec_coil"], "domain_keep": ["sec_sink"]}
+"data_integrity":
+    "domain_connected":
+        "pri_conductor": {"domain_group": [["pri_coil"], ["pri_src"], ["pri_sink"]], "connected": true}
+        "sec_conductor": {"domain_group": [["sec_coil"], ["sec_src"], ["sec_sink"]], "connected": true}
+        "insulation": {"domain_group": [["pri_coil"], ["sec_coil"], ["core"]], "connected": false}
+    "domain_adjacent":
+        "pri_terminal": {"domain_group": [["pri_src"], ["pri_sink"]], "connected": false}
+        "sec_terminal": {"domain_group": [["sec_src"], ["sec_sink"]], "connected": false}
diff --git a/examples/examples_stl/transformer_core/problem.yaml b/examples/examples_stl/transformer_core/problem.yaml
new file mode 100644
index 00000000..f51a5969
--- /dev/null
+++ b/examples/examples_stl/transformer_core/problem.yaml
@@ -0,0 +1,57 @@
+# Definition of a "file_problem" data.
+#
+# This file is used by the solver.
+# Definition of the magnetic problem to be solved.
+#
+# Thomas Guillod - Dartmouth College
+# Mozilla Public License Version 2.0
+
+"material_def":
+    "pri_copper":
+        "domain_list": ["pri_src", "pri_sink", "pri_coil"]
+        "material_type": "electric"
+        "orientation_type": "isotropic"
+        "var_type": "lumped"
+    "sec_copper":
+        "domain_list": ["sec_src", "sec_sink", "sec_coil"]
+        "material_type": "electric"
+        "orientation_type": "isotropic"
+        "var_type": "lumped"
+    "core":
+        "domain_list": ["core"]
+        "material_type": "magnetic"
+        "orientation_type": "isotropic"
+        "var_type": "lumped"
+"source_def":
+    "pri_src":
+        "domain_list": ["pri_src"]
+        "source_type": "voltage"
+        "var_type": "lumped"
+    "pri_sink":
+        "domain_list": ["pri_sink"]
+        "source_type": "voltage"
+        "var_type": "lumped"
+    "sec_src":
+        "domain_list": ["sec_src"]
+        "source_type": "voltage"
+        "var_type": "lumped"
+    "sec_sink":
+        "domain_list": ["sec_sink"]
+        "source_type": "voltage"
+        "var_type": "lumped"
+"material_val": &material_val
+    "pri_copper": {"rho_re": 1.75e-8, "rho_im": 0.0}
+    "sec_copper": {"rho_re": 1.75e-8, "rho_im": 0.0}
+    "core": { "chi_re": 150.0, "chi_im": 0.0 }
+"source_val": &source_val
+    "pri_src": {"V_re": 1.0, "V_im": 0.0, "Z_re": 1.0e-3, "Z_im": 0.0}
+    "pri_sink": {"V_re": 0.0, "V_im": 0.0, "Z_re": 1.0e-3, "Z_im": 0.0}
+    "sec_src": {"V_re": 0.0, "V_im": 0.0, "Z_re": 1.0e+3, "Z_im": 0.0}
+    "sec_sink": {"V_re": 0.0, "V_im": 0.0, "Z_re": 1.0e+3, "Z_im": 0.0}
+"sweep_solver":
+    "sim_default":
+        "init": null
+        "param":
+            "freq": 100.0e+3
+            "material_val": *material_val
+            "source_val": *source_val
diff --git a/examples/examples_stl/transformer_core/stl/core.stl b/examples/examples_stl/transformer_core/stl/core.stl
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diff --git a/examples/examples_stl/transformer_core/stl/generate_stl.py b/examples/examples_stl/transformer_core/stl/generate_stl.py
new file mode 100644
index 00000000..0f18d2bf
--- /dev/null
+++ b/examples/examples_stl/transformer_core/stl/generate_stl.py
@@ -0,0 +1,86 @@
+"""
+Build the CAD objects and export STL files.
+"""
+
+__author__ = "Thomas Guillod"
+__copyright__ = "Thomas Guillod - Dartmouth College"
+__license__ = "Mozilla Public License Version 2.0"
+
+import sys
+import cadquery as cq
+
+
+def get_cad():
+    """
+    Get the different CAD objects.
+    """
+
+    coil = cq.Workplane("XY", origin=(0.0, 0.0, -2.5))
+    coil = coil.moveTo(+14.0, +2.0).rect(10.0, 46.0).extrude(1.0)
+    coil = coil.moveTo(0.0, -16.0).rect(38.0, 10.0).extrude(1.0)
+    coil = coil.moveTo(-14.0, 0.0).rect(10.0, 42.0).extrude(1.0)
+    coil = coil.moveTo(-6.0, +16.0).rect(26.0, 10.0).extrude(1.0)
+
+    coil = coil.faces(">Z").workplane()
+    coil = coil.moveTo(+4.0, +16.0).rect(6.0, 10.0).extrude(1.0)
+
+    coil = coil.faces(">Z").workplane()
+    coil = coil.moveTo(+10.0, +16.0).rect(18.0, 10.0).extrude(1.0)
+    coil = coil.moveTo(+14.0, 0.0).rect(10.0, 42.0).extrude(1.0)
+    coil = coil.moveTo(0.0, -16.0).rect(38.0, 10.0).extrude(1.0)
+    coil = coil.moveTo(-14.0, 0.0).rect(10.0, 42.0).extrude(1.0)
+    coil = coil.moveTo(-10.0, +16.0).rect(18.0, 10.0).extrude(1.0)
+
+    coil = coil.faces(">Z").workplane()
+    coil = coil.moveTo(-4.0, +16.0).rect(6.0, 10.0).extrude(1.0)
+
+    coil = coil.faces(">Z").workplane()
+    coil = coil.moveTo(+6.0, +16.0).rect(26.0, 10.0).extrude(1.0)
+    coil = coil.moveTo(+14.0, 0.0).rect(10.0, 42.0).extrude(1.0)
+    coil = coil.moveTo(0.0, -16.0).rect(38.0, 10.0).extrude(1.0)
+    coil = coil.moveTo(-14.0, +2.0).rect(10.0, 46.0).extrude(1.0)
+
+    core = cq.Workplane("XZ")
+    core = core.moveTo(0.0, 0.0).box(52.0, 19.0, 16.0)
+    core = core.moveTo(0.0, 0.0).rect(28.0, 9.0).cutThruAll()
+
+    src = cq.Workplane("XY").moveTo(+14.0, +25.5).rect(10.0, 1.0).extrude(1.0)
+    sink = cq.Workplane("XY").moveTo(-14.0, +25.5).rect(10.0, 1.0).extrude(1.0)
+    src = src.translate((0.0, 0.0, -2.5))
+    sink = sink.translate((0.0, 0.0, +1.5))
+
+    cad_dict = {
+        "core": core,
+        "pri_coil": coil.translate((+20.0, 0.0, 0.0)),
+        "pri_src": src.translate((+20.0, 0.0, 0.0)),
+        "pri_sink": sink.translate((+20.0, 0.0, 0.0)),
+        "sec_coil": coil.mirror(mirrorPlane="XY").translate((-20.0, 0.0, 0.0)),
+        "sec_src": src.mirror(mirrorPlane="XY").translate((-20.0, 0.0, 0.0)),
+        "sec_sink": sink.mirror(mirrorPlane="XY").translate((-20.0, 0.0, 0.0)),
+    }
+
+    return cad_dict
+
+
+def write_cad(cad_dict, tol):
+    """
+    Export CAD objects to STL files.
+    """
+
+    for tag, cad in cad_dict.items():
+        if cad is not None:
+            cad.val().exportStl("%s.stl" % tag, tolerance=tol)
+
+
+if __name__ == "__main__":
+    # get the object tolerance
+    tol = 1e-3
+
+    # get the CAD objects
+    cad_dict = get_cad()
+
+    # save STL/STEP files
+    write_cad(cad_dict, tol)
+
+    # exit
+    sys.exit(0)
diff --git a/examples/examples_stl/transformer_core/stl/pri_coil.stl b/examples/examples_stl/transformer_core/stl/pri_coil.stl
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