{"id":119,"date":"2022-08-22T11:17:32","date_gmt":"2022-08-22T02:17:32","guid":{"rendered":"https:\/\/www.ssil.co.jp\/product\/EMSolution\/en2\/?post_type=case&#038;p=119"},"modified":"2022-08-22T17:26:59","modified_gmt":"2022-08-22T08:26:59","slug":"voltage","status":"publish","type":"case","link":"https:\/\/www.ssil.co.jp\/product\/EMSolution\/en\/case\/voltage\/","title":{"rendered":"Analysis of a coil connected to a constant voltage power supply"},"content":{"rendered":"<h3>Summary<\/h3>\n<p>So far, we have analyzed the case where a constant-current power supply is connected to the coil. Here, we analyze the case where a constant-voltage power supply (power supply given a voltage waveform) is connected to the coil. We also show how to continue the previous calculation by restarting.  <\/p>\n<h3>Explanation<\/h3>\n<p>The model here is the same as the model used in <a href=\"\/product\/EMSolution\/en\/case\/elmcur\/\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"display:inline\"><font color=\"Red\">\u201cStatic magnetic field analysis using ELMCUR (element current source)&quot;<\/font><\/a>.  A voltage is applied to that coil by a constant voltage power supply to excite the coil. This problem is linear with no eddy currents and is expressed as a concentrated constant circuit. Therefore, we do not normally perform this type of analysis, but we will run it as an example. The files pre_geom2D.neu and 2D_to_3D are identical. A constant voltage of 100V is given in the input.1 file. Assume that an external resistor of 5 \u03a9 is connected to the coil. The current value of the coil at each time is output in output.<\/p>\n<p>Next, the voltage of the power supply drops to zero at 0.1 second to simulate a short-circuit condition; rename the solutions file created in the first run to old_solutions and restart with the input.2 file as input. The coil current value is output to the output file even after restarting. The current waveform is plotted as shown in Fig. 1. The one based on the circuit calculation is the time variation obtained analytically from the resistance and inductance. They are in good agreement.<\/p>\n<div class=\"img col1\">\n<div>\n        <img decoding=\"async\" src=\"\/product\/EMSolution\/en\/wp-content\/uploads\/voltage01.png\" alt=\"\" \/><\/p>\n<p class=\"text01\">Fig.1\u3000Time variation of coil current<\/p>\n<\/p><\/div>\n<\/div>\n<p><!--more--><\/p>\n<h3>How to use<\/h3>\n<h4>input.1<\/h4>\n<ul>\n<li>\n<p>5\u03a9 external resistor is connected.  <\/p>\n<p class=\"slideText\"><font color=\"Red\">* SERIES_EXTERNAL_RESISTANCE *<\/font><br \/>\n<font color=\"Red\">                            5.0<\/font>\n<\/p>\n<\/li>\n<li>\n<p>\u2022 A constant voltage of 100 V is given.  <\/p>\n<p class=\"slideText\">* PS_ID <font color=\"Red\">*  TYPE  * TIME_ID *<\/font>  INITIAL_CURRENT  *<br \/>\n       1            <font color=\"Red\">1                1<\/font>                        0.0<br \/>\n\uff08omitted\uff09<br \/>\n<font color=\"Red\">* TIME_ID *<\/font> OPTION *<br \/>\n        <font color=\"Red\">1<\/font>               0<br \/>\n<font color=\"Red\">*   C0    *<\/font>   C1    *   C2    *   C3     *   C4     *  C5    *   C6    *<br \/>\n<font color=\"Red\">100.0<\/font>        0.0        0.0        0.0         0.0       0.0        0.0<br \/>\n*  TEXP   *   TCYCLE  *<br \/>\n     0.0             0.00\n<\/p>\n<\/li>\n<\/ul>\n<h4>input.2<\/h4>\n<ul>\n<li>\n<p>Restart from the 10th step of the first run.  <\/p>\n<p class=\"slideText\"><font color=\"Red\">* INITIAL_STEP *<\/font><br \/>\n<font color=\"Red\">             10<\/font>\n<\/p>\n<\/li>\n<li>\n<p>voltage to 0V. (0V as a short-circuit condition.) <\/p>\n<p class=\"slideText\"><font color=\"Red\">* TIME_ID *<\/font> OPTION *<br \/>\n        <font color=\"Red\">1<\/font>               0<br \/>\n<font color=\"Red\">*   C0    *<\/font>   C1    *   C2    *   C3     *   C4     *  C5    *   C6    *<br \/>\n     <font color=\"Red\">0.0<\/font>        0.0        0.0        0.0         0.0       0.0        0.0<br \/>\n*  TEXP   *   TCYCLE  *<br \/>\n     0.0             0.00\n<\/p>\n<\/li>\n<\/ul>\n<h3>Download<\/h3>\n<p><button type=\"button\" class=\"btn btn-danger btn-lg\"><a href=\"https:\/\/www.ssil.co.jp\/product\/EMSolution\/en\/wp-content\/uploads\/Trans_Voltage.zip\">Sample data DL<\/a><\/button>  <\/p>\n<p>\u30fb input.1 \uff1aInput condition file<br \/>\n\u30fb input.2 \uff1aInput condition file<br \/>\n\u30fb pre_geom2D.neu \uff1aMesh file<br \/>\n\u30fb 2D_to_3D \uff1a2D mesh extension file  <\/p>\n","protected":false},"excerpt":{"rendered":"<p>Summary So far, we have analyzed the case where a constant-current power supply is connected to the coil. Here, we analyze the case where a constant-voltage power supply (power supply given a voltage waveform) is connected to the coil. We also show how to continue the previous calculation by restarting. Explanation The model here is [&hellip;]<\/p>\n","protected":false},"featured_media":0,"template":"","tags":[],"case_cat":[5],"class_list":["post-119","case","type-case","status-publish","hentry","case_cat-kato"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ssil.co.jp\/product\/EMSolution\/en\/wp-json\/wp\/v2\/case\/119"}],"collection":[{"href":"https:\/\/www.ssil.co.jp\/product\/EMSolution\/en\/wp-json\/wp\/v2\/case"}],"about":[{"href":"https:\/\/www.ssil.co.jp\/product\/EMSolution\/en\/wp-json\/wp\/v2\/types\/case"}],"version-history":[{"count":9,"href":"https:\/\/www.ssil.co.jp\/product\/EMSolution\/en\/wp-json\/wp\/v2\/case\/119\/revisions"}],"predecessor-version":[{"id":2346,"href":"https:\/\/www.ssil.co.jp\/product\/EMSolution\/en\/wp-json\/wp\/v2\/case\/119\/revisions\/2346"}],"wp:attachment":[{"href":"https:\/\/www.ssil.co.jp\/product\/EMSolution\/en\/wp-json\/wp\/v2\/media?parent=119"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ssil.co.jp\/product\/EMSolution\/en\/wp-json\/wp\/v2\/tags?post=119"},{"taxonomy":"case_cat","embeddable":true,"href":"https:\/\/www.ssil.co.jp\/product\/EMSolution\/en\/wp-json\/wp\/v2\/case_cat?post=119"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}