これまでEMSolutionの入力ファイル（inputファイル）は固定フォーマットとしていましたが，この度JSONにも対応いたしました。

　固定フォーマットは情報量が少なく，カラムでどのパラメータを設定すればよいのか慣れるまで難しいところがありますが，JSONフォーマットでは設定パラメータをキー（key）と値（value）で対応させているため，行数は長くなりますが可読性は上がるかと思います。 また，固定フォーマットは記述する順番に制約がありましたが，JSONフォーマットではそのような制約はありません。よく使用する項目を上に移動するなどのカスタマイズも可能です。 また，キーと値で読み込むため，コメントなどは新しいキーと値として記述することも可能です。

なお，リリース2024.11からは，従来のテキストベースのinputファイルでEMSolutionを実行すると，拡張子をjsonとしたJSONフォーマットのinputファイルが自動で作成されるようになっていますので，input.jsonへの移行もスムーズにできるかと思います。

• パラメータ名称は従来のテキストベースの名称と同じにしています。
• これまで複数個入力する場合はその個数と設定項目を入力していましたが，配列入力するように変更しています。
• "16_1_3D_Element_Properties"にある"comment"はその名の通りコメントです。パラメータ項目ではないためEMSolutionでは使用されません。このように予約されていないキー名を使用すれば値に自由に文章や値を記述することができます。
• JSONはPythonで簡単に読み込み，修正が可能です。パラメータサーベイなどでパラメータ変更を簡単にすることができます。

JSONフォーマットの詳細説明は別途作成予定です。

例：Problem20

◆input.json

{ “metaData” : { “EMSolutionVersion” : “2024.11.1”, “releaseDate” : “November 15, 2024”, “creationDate” : “Mon Dec 2 10:51:43 2024”, “comments” : “This file is converted from the EMSolution input data.” }, “0_Release_Number” : { “RLS_NO” : “r10.1” }, “1_Execution_Control” : { “PRE_PROCESSING” : 1, “MAKE_SYSTEM_MATRICES” : 1, “SOLVE_EQUATION” : 1, “POST_PROCESSING” : 1 }, “2_Analysis_Type” : { “STATIC” : 1, “AC” : 0, “TRANSIENT” : 0, “NON_LINEAR” : 1, “STEADY_CURRENT” : 0 }, “3_Potential_Gauge_Conditions” : { “POTENTIAL” : 0, “NODAL_FORCE_OPTION” : 0, “PHI_OPTION” : 0, “FIXED_COORDINATE” : 0, “TREE_GAUGE” : -1, “REGULARIZATION” : 1, “RENUMBERING” : 0, “SCALING” : 0, “LINE_SEARCH” : 0, “MATRIX_ASYMMETRICITY” : 0 }, “4_Shape_Function_Order_Added_Features” : { “NODE_ORDER” : 1, “EDGE_ORDER” : 1, “METRIC_MOD” : 0, “QUAD_TRI” : 0, “CALC_IND” : 0, “THIN_ELEM” : 0, “PARALLEL_NO” : 1, “PARALLEL_OPTION” : 0 }, “5_Convergence_Conditions” : { “ICCG_CONV” : 9.99999999999999955e-07, “ACCEL_FACTOR” : 1.02000000000000002e+00, “DIV_FACTOR” : 2.00000000000000000e+00, “DIV_ITERATIONS” : 10, “SOLVER” : 0, “THETA” : 6.66666699999999945e-01, “THETA_NETWORK” : 5.00000000000000000e-01, “THETA_MOTION” : 5.00000000000000000e-01, “MAX_ITERATIONS” : 0, “5_2_Nonlinear_Convergence_Condition” : { “NON_LINEAR_CONV” : 1.00000000000000002e-03, “RELAXATION” : 1.00000000000000000e+00, “NO_ITERATIONS” : 50, “INIT_OPTION” : 0, “ICCG_CONV_RATIO” : 0.00000000000000000e+00, “CHECK_B” : 0.00000000000000000e+00, “DELTA_A” : 0, “NON_LINEAR_METHOD” : 0 } }, “6_Gaussian_Integral_Point” : { “POINTS_IN_1D” : 3, “POINT_IN_TRIANGLE” : 7, “MAT_POINTS” : 1 }, “7_Initial_Conditions” : { “INITIAL_STEP” : -1, “DATA_TYPE” : 0, “INITIAL_PHASE” : 0.00000000000000000e+00, “MULTI” : 0, “OUTPUT_STEP_NO” : 0, “CYCLE_AC” : 0.00000000000000000e+00 }, “8_Calculation_Step” : { “NO_STEPS” : [ 4 ], “DELTA_TIME” : [ 1.00000000000000000e+00 ], “INITIAL_TIME” : 0.00000000000000000e+00, “CYCLE” : 0, “TP_EEC” : { “N_CORRECT” : 0, “N_BACK” : 0, “TP_EEC_OPTION” : 0, “MAX_NO_CORRECTION” : 0 } }, “9_Output_Step” : { “TIME_DIFF” : 3, “RESTART_FILE_OPTION” : 0, “ALL_STEP_OUTPUT” : 0, “OUTPUT_STEP_SET” : [ [ 1, 5, 1 ] ] }, “10_1_Input_Files” : { “INPUT_MESH_FILE” : 2, “UNIT” : 0, “NO_MESH” : 0, “MESHLESS” : 0 }, “10_2_Output_Files” : { “POST_DATA_FILE” : 5, “ELEM_OUT” : 1, “NODE_OUT” : 1, “AVERAGE” : 0, “WIDE” : 0 }, “10_3_Post_Files” : { “MESH” : 1, “CURRENT” : 0, “MAGNETIC” : 1, “FORCE_J_B” : 0, “FORCE_NODAL” : 1, “DISP” : 0, “HEAT” : 0 }, “11_Print_Output” : { “HEAT” : 0, “FORCE_NODAL” : { “TYPE” : 1 }, “MAG_FLUX” : { “LOOP_NODES” : [ [ 22733, 22771, 22809, 22847, 22885, 22923, 22961, 22960, 22959, 22958, 22957, 22956, 22955, 22954, 22953 ], [ 22754, 22792, 22830, 22868, 22906, 22944, 22982, 23020, 23058, 23096, 23134, 23172, 23210, 23209, 23208, 23207, 23206, 23205, 23204, 23203, 23202, 23164, 23126, 23088, 23050, 23012, 22974, 22936, 22898, 22860, 22822, 22784, 22746 ] ] } }, “12_Geometry” : { “GEOMETRY” : 0, “DELTA_Z_THETA” : 1.00000000000000000e+00 }, “13_Boundary_Conditions” : { “FAR_BOUNDARY_CONDITION” : 1, “PHI_BOUNDARY_CONDITION” : 0, “DISTANCE_JUDGE” : 1.00000000000000005e-04, “DIRICHLET_PLANE” : { “CXYZ” : [ [ 1.00000000000000000e+00, 0.00000000000000000e+00, 0.00000000000000000e+00, 0.00000000000000000e+00, 0 ], [ 0.00000000000000000e+00, 1.00000000000000000e+00, 0.00000000000000000e+00, 0.00000000000000000e+00, 0 ] ] } }, “16_Material_Properties” : { “EXTEND_TOTAL_for_COIL” : 1, “16_1_3D_Element_Properties” : [ { “MAT_ID” : 1, “POTENTIAL” : 1, “ElectricProperty” : { “conductivity” : { “comment” : “SIGMA_XYZ for anisotropic, or isotropic SIGMA if not defined.”, “SIGMA” : 0.00000000000000000e+00 } }, “MagneticProperty” : { “comment” : “MU_XYZ for anisotropic, or isotropic MU if not defined.”, “MU” : 1.00000000000000000e+00 } }, { “MAT_ID” : 11, “POTENTIAL” : 0, “ElectricProperty” : { “conductivity” : { “comment” : “SIGMA_XYZ for anisotropic, or isotropic SIGMA if not defined.”, “SIGMA” : 0.00000000000000000e+00 } }, “MagneticProperty” : { “comment” : “MU_XYZ for anisotropic, or isotropic MU if not defined.”, “MU” : 1.00000000000000000e+00, “BH_CURVE_ID” : 1 } }, { “MAT_ID” : 12, “POTENTIAL” : 0, “ElectricProperty” : { “conductivity” : { “comment” : “SIGMA_XYZ for anisotropic, or isotropic SIGMA if not defined.”, “SIGMA” : 0.00000000000000000e+00 } }, “MagneticProperty” : { “comment” : “MU_XYZ for anisotropic, or isotropic MU if not defined.”, “MU” : 1.00000000000000000e+00, “BH_CURVE_ID” : 1 } } ] }, “17_Field_Source” : [ { “COIL” : { “SERIES_ID” : 1, “TIME_ID” : 0, “IN_ROTOR” : 0, “POTENTIAL” : 0, “TO_MESHED_COIL” : 0, “data” : [ { “type” : “GCE”, “CURRENT” : 1.00000000000000000e+00, “S_XYZ” : [ 2.85000000000000010e-02, -1.45000000000000007e-02, 7.49999999999999972e-02 ], “E_XYZ” : [ 2.85000000000000010e-02, 1.45000000000000007e-02, 7.49999999999999972e-02 ], “W1_XYZ” : [ 0.00000000000000000e+00, 0.00000000000000000e+00, 4.83000000000000027e-02 ], “W2_XYZ” : [ 8.99999999999999932e-03, 0.00000000000000000e+00, 0.00000000000000000e+00 ], “COORD_ID” : 0 }, { “type” : “GCE”, “CURRENT” : 1.00000000000000000e+00, “S_XYZ” : [ 1.45000000000000007e-02, 2.85000000000000010e-02, 7.49999999999999972e-02 ], “E_XYZ” : [ -1.45000000000000007e-02, 2.85000000000000010e-02, 7.49999999999999972e-02 ], “W1_XYZ” : [ 0.00000000000000000e+00, 0.00000000000000000e+00, 4.83000000000000027e-02 ], “W2_XYZ” : [ 0.00000000000000000e+00, 8.99999999999999932e-03, 0.00000000000000000e+00 ], “COORD_ID” : 0 }, { “type” : “GCE”, “CURRENT” : 1.00000000000000000e+00, “S_XYZ” : [ -2.85000000000000010e-02, 1.45000000000000007e-02, 7.49999999999999972e-02 ], “E_XYZ” : [ -2.85000000000000010e-02, -1.45000000000000007e-02, 7.49999999999999972e-02 ], “W1_XYZ” : [ 0.00000000000000000e+00, 0.00000000000000000e+00, 4.83000000000000027e-02 ], “W2_XYZ” : [ -8.99999999999999932e-03, 0.00000000000000000e+00, 0.00000000000000000e+00 ], “COORD_ID” : 0 }, { “type” : “GCE”, “CURRENT” : 1.00000000000000000e+00, “S_XYZ” : [ -1.45000000000000007e-02, -2.85000000000000010e-02, 7.49999999999999972e-02 ], “E_XYZ” : [ 1.45000000000000007e-02, -2.85000000000000010e-02, 7.49999999999999972e-02 ], “W1_XYZ” : [ 0.00000000000000000e+00, 0.00000000000000000e+00, 4.83000000000000027e-02 ], “W2_XYZ” : [ 0.00000000000000000e+00, -8.99999999999999932e-03, 0.00000000000000000e+00 ], “COORD_ID” : 0 }, { “type” : “ARC”, “CURRENT” : 1.00000000000000000e+00, “XYZ” : [ 1.45000000000000007e-02, 1.45000000000000007e-02, 7.49999999999999972e-02 ], “RADIUS” : 1.40000000000000003e-02, “RADIAL_W” : 9.66000000000000053e-02, “AXIAL_W” : 1.79999999999999986e-02, “ALPHA” : 0.00000000000000000e+00, “BETA” : 0.00000000000000000e+00, “PHI1” : 0.00000000000000000e+00, “PHI2” : 9.00000000000000000e+01, “COORD_ID” : 0 }, { “type” : “ARC”, “CURRENT” : 1.00000000000000000e+00, “XYZ” : [ -1.45000000000000007e-02, 1.45000000000000007e-02, 7.49999999999999972e-02 ], “RADIUS” : 1.40000000000000003e-02, “RADIAL_W” : 9.66000000000000053e-02, “AXIAL_W” : 1.79999999999999986e-02, “ALPHA” : 0.00000000000000000e+00, “BETA” : 0.00000000000000000e+00, “PHI1” : 9.00000000000000000e+01, “PHI2” : 1.80000000000000000e+02, “COORD_ID” : 0 }, { “type” : “ARC”, “CURRENT” : 1.00000000000000000e+00, “XYZ” : [ -1.45000000000000007e-02, -1.45000000000000007e-02, 7.49999999999999972e-02 ], “RADIUS” : 1.40000000000000003e-02, “RADIAL_W” : 9.66000000000000053e-02, “AXIAL_W” : 1.79999999999999986e-02, “ALPHA” : 0.00000000000000000e+00, “BETA” : 0.00000000000000000e+00, “PHI1” : -1.80000000000000000e+02, “PHI2” : -9.00000000000000000e+01, “COORD_ID” : 0 }, { “type” : “ARC”, “CURRENT” : 1.00000000000000000e+00, “XYZ” : [ 1.45000000000000007e-02, -1.45000000000000007e-02, 7.49999999999999972e-02 ], “RADIUS” : 1.40000000000000003e-02, “RADIAL_W” : 9.66000000000000053e-02, “AXIAL_W” : 1.79999999999999986e-02, “ALPHA” : 0.00000000000000000e+00, “BETA” : 0.00000000000000000e+00, “PHI1” : -9.00000000000000000e+01, “PHI2” : 0.00000000000000000e+00, “COORD_ID” : 0 } ] } }, { “CIRCUIT” : { “REGION_FACTOR” : 4.00000000000000000e+00, “REGION_PARALLEL” : 1.00000000000000000e+00, “SERIES_IDS” : [ 1 ], “INDUCTANCE_MATRIX” : { “comment” : “IN_IND=0: lower triangular matrix. \n IN_IND=1: diagonal matrix. IN_ID=2 : not defined.”, “format” : “[1st row][2nd row][3rd row]”, “IN_IND” : 0, “MATRIX” : [ [ 0.00000000000000000e+00 ] ] }, “RESISTANCE_MATRIX” : { “comment” : “IN_IND=0: lower triangular matrix. \n IN_IND=1: diagonal matrix. IN_ID=2 : not defined.”, “format” : “[1st row][2nd row][3rd row]”, “IN_RES” : 0, “MATRIX” : [ [ 0.00000000000000000e+00 ] ] }, “CONNECTION_MATRIX” : { “comment” : “IN_CON=0: NO_SERIES * NO_POWER_SUPPLIES connection matrix. \n IN_CON=1: diagonal connection matrix.”, “IN_CON” : 0, “format” : “[1st row][2nd row][3rd row]”, “MATRIX” : [ [ 1.00000000000000000e+00 ] ] }, “POWER_SUPPLIES” : [ { “PS_ID” : 1, “TYPE” : 0, “TIME_ID” : 1, “INITIAL_CURRENT” : 0.00000000000000000e+00 } ] } } ], “18_Time_Function” : [ { “TIME_ID” : 1, “OPTION” : 1, “TIME” : [ 0.00000000000000000e+00, 1.00000000000000000e+00, 2.00000000000000000e+00, 3.00000000000000000e+00, 4.00000000000000000e+00 ], “VALUE” : [ 0.00000000000000000e+00, 1.00000000000000000e+03, 3.00000000000000000e+03, 4.50000000000000000e+03, 5.00000000000000000e+03 ] } ], “20_BH_Curve” : [ { “BH_CURVE_ID” : 1, “data” : { “H” : [ 0.00000000000000000e+00, 2.70000000000000000e+01, 5.80000000000000000e+01, 1.00000000000000000e+02, 1.53000000000000000e+02, 1.85000000000000000e+02, 2.05000000000000000e+02, 2.33000000000000000e+02, 2.55000000000000000e+02, 2.85000000000000000e+02, 3.20000000000000000e+02, 3.55000000000000000e+02, 4.05000000000000000e+02, 4.70000000000000000e+02, 5.55000000000000000e+02, 6.73000000000000000e+02, 8.36000000000000000e+02, 1.06500000000000000e+03, 1.22000000000000000e+03, 1.42000000000000000e+03, 1.72000000000000000e+03, 2.13000000000000000e+03, 2.67000000000000000e+03, 3.48000000000000000e+03, 4.50000000000000000e+03, 5.95000000000000000e+03, 7.65000000000000000e+03, 1.01000000000000000e+04, 1.30000000000000000e+04, 1.59000000000000000e+04, 2.11000000000000000e+04, 2.63000000000000000e+04, 3.29000000000000000e+04, 4.27000000000000000e+04, 6.17000000000000000e+04, 8.43000000000000000e+04, 1.10000000000000000e+05, 1.35000000000000000e+05, 6.26200000000000000e+06 ], “B” : [ 0.00000000000000000e+00, 1.00000000000000002e-02, 2.50000000000000014e-02, 5.00000000000000028e-02, 1.00000000000000006e-01, 1.49999999999999994e-01, 2.00000000000000011e-01, 2.99999999999999989e-01, 4.00000000000000022e-01, 5.00000000000000000e-01, 5.99999999999999978e-01, 6.99999999999999956e-01, 8.00000000000000044e-01, 9.00000000000000022e-01, 1.00000000000000000e+00, 1.10000000000000009e+00, 1.19999999999999996e+00, 1.30000000000000004e+00, 1.35000000000000009e+00, 1.39999999999999991e+00, 1.44999999999999996e+00, 1.50000000000000000e+00, 1.55000000000000004e+00, 1.60000000000000009e+00, 1.64999999999999991e+00, 1.69999999999999996e+00, 1.75000000000000000e+00, 1.80000000000000004e+00, 1.85000000000000009e+00, 1.89999999999999991e+00, 1.94999999999999996e+00, 2.00000000000000000e+00, 2.04999999999999982e+00, 2.10000000000000009e+00, 2.14999999999999991e+00, 2.20000000000000018e+00, 2.25000000000000000e+00, 2.29999999999999982e+00, 1.00000000000000000e+01 ] } } ] }

◆Pythonの利用

Pythonを使用したinput.jsonの読み込みとデータと編集例です。Time Functionを10倍して設定しなおしています。

# Read the JSON file with open(input.json, ‘r’) as file: data = json.load(file) # ’18_Time_Function’ of first data time_function = data[“18_Time_Function”][0] new_time_function = [x * 10 for x in time_function] time_function[“VALUE”] = new_time_function