I want to calculate the induced voltage (dφ/dt) using a script and display a graph.

The following is an example in Python script.
# -*- coding: utf-8 -*-

import csv

#Output destination path for calculated induced voltage results

CSVpath = u"D:/WorkFolder/PythonTest/Vu noload.csv"

#Names of datasets and graphs to be created

Name = u"Vu noload"

#[Coil Flux-Linkage] Obtain result data object

CoilFlux = app.GetCurrentStudy().GetResultTable().GetData("FEMCoilFlux")

#Specify the column ID of the [Coil Flux-Linkage] data you want to refer to.

col_CoilFlux = 0

app = designer.GetApplication()

#Get the [Step Interval Definition Type] setting for [Step Control].

flg = app.GetCurrentStudy().GetStep().GetFlagAsString(u"StepType")

#If [Step Interval Definition Type] is “Regular Intervals,” perform the induced voltage calculation process. If not, perform error processing.

if flg == u"Uniform":

   #Get the number of calculation steps

   steps = app.GetCurrentStudy().GetStep().GetValue("Step")

   #Get [Divisions] from [Step Control]

   stepdiv = app.GetCurrentStudy().GetStep().GetValue("StepDivision")

   #Get the [End Time] of [Step Control]

   stepend = app.GetCurrentStudy().GetStep().GetValueWithUnit("EndPoint",u"s")

   #Calculate time intervals

   dt = stepend / stepdiv

   #Calculate the induced voltage for each step.

   for i in range(1,int(steps+1)):

       #Since dt=0 in the first step, substitute Ind=0 for the induced voltage.

       if i == 1:

           Ind = 0

       #From the second step onwards, the induced voltage Ind is calculated based on the chained magnetic flux results

       else:

           Fai1 = CoilFlux.GetValue(i-2, col_CoilFlux) #Obtain the Coil Flux-Linkage results for the (i-1)-th step.

           Fai2 = CoilFlux.GetValue(i-1, col_CoilFlux) #Obtain the Coil Flux-Linkage results for the i-th step.

           Ind = (Fai2 - Fai1) / dt #Calculate induced voltage

       now_time = dt * (i-1) #Calculate the time of the i-th step

       #Open CSV file in append mode

       with open(CSVpath,mode='a', newline='') as f:

           writer = csv.writer(f)

           #Write the calculation results of step i to csv.

           writer.writerow([now_time, Ind])

   #Create a dataset from the output CSV file

   dataset = app.GetDataManager().CreateFromFile(CSVpath,Name, u"Time, s", u"InducedVoltage, V")

   #Create graphs from the created dataset

   app.GetDataManager().CreateGraphModel(dataset, Name)

   #Display the created graph

   app.GetDataManager().Show(Name)

else:

   print(u"The induced voltage cannot be calculated because the [Step Control] settings are not set in [End Time] and [Divisions].")
*Note 

・In order to calculate the induced voltage, [Step Control] must specify [End Time] and [Divisions].

・The following checks must be performed before executing this sample.

　　・The CSV file specified in "CSVpath" does not exist.

　　・The dataset and graph specified in "Name" do not exist.