MethodToEstimateRA031506-1 - (************** Content-type:

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Unformatted text preview: (************** Content-type: application/mathematica ************** CreatedBy='Mathematica 5.1' Mathematica-Compatible Notebook This notebook can be used with any Mathematica-compatible application, such as Mathematica, MathReader or Publicon. The data for the notebook starts with the line containing stars above. f To get the notebook into a Mathematica-compatible application, do one of the following: o * Save the data starting with the line of stars above into a file with a name ending in .nb, then open the file inside the application; * Copy the data starting with the line of stars above to the clipboard, then use the Paste menu command inside the application. Data for notebooks contains only printable 7-bit ASCII and can be sent directly in email or through ftp in text mode. Newlines can be CR, LF or CRLF (Unix, Macintosh or MS-DOS style). C NOTE: If you modify the data for this notebook not in a Mathematica- compatible application, you must delete the line below containing the word CacheID, otherwise Mathematica-compatible applications may try to use invalid cache data. t For more information on notebooks and Mathematica-compatible applications, contact Wolfram Research: web: email: phone: +1-217-398-0700 (U.S.) Notebook reader applications are available free of charge from Wolfram Research. *******************************************************************) * (*CacheID: 232*) ( (*NotebookFileLineBreakTest NotebookFileLineBreakTest*) (*NotebookOptionsPosition[ 301732, 6023]*) (*NotebookOutlinePosition[ 305079, 6134]*) (* CellTagsIndexPosition[ 304595, 6112]*) (*WindowFrame->Normal*) ( Notebook[{ N Cell[CellGroupData[{ Cell[TextData[{ "Estimating ", Cell[BoxData[ \(TraditionalForm\`R\_A\)]] }], "Title", CellTags->"c:1"], Cell["Martin Fox 3/16/05", "Author"], C Cell[CellGroupData[{ C Cell["Abstract", "Section", CellTags->"c:2"], Cell[TextData[{ "\tThe armature resistance ", Cell[BoxData[ \(TraditionalForm\`R\_A\)]], " must be deduced to be able to calculate the droop in speed with \ increasing torque in DC motors, and to estimate electrical losses and \ separate them from mechanical losses. The basic equation for a DC motor is f \ = ", Cell[BoxData[ \(TraditionalForm\`V\_A\/C\)]], "- ", Cell[BoxData[ \(TraditionalForm\`\(i\_A\ R\_A\)\/C\)]], " which relates the output frequency of the rotary pulse encoder [RPE] to \ the measured armature voltage and current. To deduce the unknown constants C \ and ", Cell[BoxData[ \(TraditionalForm\`R\_A\)]], " from a set of measurements of f versus ", Cell[BoxData[ \(TraditionalForm\`V\_A\)]], " and ", Cell[BoxData[ \(TraditionalForm\`I\_A\)]], " it is necessary to do a multivariate regression. Performing such a \ regression using ", StyleBox["Mathematica", FontSlant->"Italic"], " indicated that for the particular DC motor studied in this experiment, \ the armature resistance was estimated to be 15.1219 Ohm. " }], "Text"] }, Open ]], } Cell[CellGroupData[{ C Cell["Introduction", "Section",...
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MethodToEstimateRA031506-1 - (************** Content-type:

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