{"id":458,"date":"2019-10-02T20:03:24","date_gmt":"2019-10-02T11:33:24","guid":{"rendered":"http:\/\/people.utm.my\/razman-ayop\/?p=458"},"modified":"2020-07-30T10:45:57","modified_gmt":"2020-07-30T02:15:57","slug":"sample-rate-for-controller","status":"publish","type":"post","link":"https:\/\/people.utm.my\/razman-ayop\/sample-rate-for-controller\/","title":{"rendered":"Sample Rate for Controller"},"content":{"rendered":"<ul>\n<li>For official reference, please read Nyquist rate.<\/li>\n<li>The relationship between the controller and the sample time is:<br \/>\n<span style=\"color: #ff0000\">Sample Time &lt;= Fastest Settling Time \/ Minimum Number of Sample<\/span><\/li>\n<li>Recommended minimum number of sample is 30. Higher is better.<\/li>\n<li>Fastest settling time is obtained when the voltage or current used in the controller feedback is within 2% of its final value.<\/li>\n<li>Example: A buck converter using a PI controller have the fastest settling time of the output voltage around 3 ms. Therefore, the maximum sample time is:<br \/>\n= 30 ms \/ 30 samples = 100 us<br \/>\ndSPACE sample time for this controller is 25 \u00b5s, which is below 100 \u00b5s.<br \/>\nTherefore, this controller can be used.<\/li>\n<li>Here what happen to if the sample time is too close to the settling time. The controller produces unstable output, resulting unstable output of the power converter.<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-459\" src=\"https:\/\/people.utm.my\/razman-ayop\/wp-content\/uploads\/sites\/2074\/2019\/12\/3.jpg\" alt=\"\" width=\"546\" height=\"583\" srcset=\"https:\/\/people.utm.my\/razman-ayop\/wp-content\/uploads\/sites\/2074\/2019\/12\/3.jpg 546w, https:\/\/people.utm.my\/razman-ayop\/wp-content\/uploads\/sites\/2074\/2019\/12\/3-281x300.jpg 281w\" sizes=\"(max-width: 546px) 100vw, 546px\" \/><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>For official reference, please read Nyquist rate. The relationship between the controller and the sample time is: Sample Time &lt;= Fastest Settling Time \/ Minimum Number of Sample Recommended minimum number of sample is 30. Higher is better. Fastest settling time is obtained when the voltage or current used in the controller feedback is within [&hellip;]<\/p>\n","protected":false},"author":24954,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[32],"tags":[],"class_list":["post-458","post","type-post","status-publish","format-standard","hentry","category-research-guidance"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/people.utm.my\/razman-ayop\/wp-json\/wp\/v2\/posts\/458","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/people.utm.my\/razman-ayop\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/people.utm.my\/razman-ayop\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/people.utm.my\/razman-ayop\/wp-json\/wp\/v2\/users\/24954"}],"replies":[{"embeddable":true,"href":"https:\/\/people.utm.my\/razman-ayop\/wp-json\/wp\/v2\/comments?post=458"}],"version-history":[{"count":1,"href":"https:\/\/people.utm.my\/razman-ayop\/wp-json\/wp\/v2\/posts\/458\/revisions"}],"predecessor-version":[{"id":460,"href":"https:\/\/people.utm.my\/razman-ayop\/wp-json\/wp\/v2\/posts\/458\/revisions\/460"}],"wp:attachment":[{"href":"https:\/\/people.utm.my\/razman-ayop\/wp-json\/wp\/v2\/media?parent=458"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/people.utm.my\/razman-ayop\/wp-json\/wp\/v2\/categories?post=458"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/people.utm.my\/razman-ayop\/wp-json\/wp\/v2\/tags?post=458"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}