{"id":1484,"date":"2020-09-20T16:34:10","date_gmt":"2020-09-20T14:34:10","guid":{"rendered":"https:\/\/pa3csg.nl\/?page_id=1484"},"modified":"2020-09-20T18:05:55","modified_gmt":"2020-09-20T16:05:55","slug":"simple-rotor-schematic-for-ac-motors","status":"publish","type":"page","link":"https:\/\/pa3csg.nl\/?page_id=1484","title":{"rendered":"Simple Rotor schematic for AC motors"},"content":{"rendered":"\n

After 25 years my dish needed a new control box for the rotators, the old one was rather worn out. I kept the same AC motors as they performed very well over the last decades. I decided to put the control unit at the tower and to use a 5 wire cable to control the Az and the El rotators, switching a relay to ground.<\/p>\n\n\n\n

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The schematic of the motor control<\/figcaption><\/figure>\n\n\n\n
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The 12V circuit with the endstops. Relays used are the Omron MY4N-J. Pin numbers and connection in the schematics.<\/figcaption><\/figure>\n\n\n\n

<\/p>\n\n\n\n

I added snubbers over the relay contacts, not only for the mains switch but also for the help winding. The last isn’t necessary probably. There is also a provision for mechanical end stops, so in theory nothing could happen.<\/p>\n\n\n\n

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Complet view of the outside unit<\/figcaption><\/figure>\n\n\n\n
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The Az endstop, the little wheel in the bottom left corner is the switch. The blue unit was a spare limit switch<\/figcaption><\/figure>\n\n\n\n
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The hook the limit switch runs into<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"

After 25 years my dish needed a new control box for the rotators, the old one was rather worn out. I kept the same AC […]<\/a><\/p>\n<\/div>","protected":false},"author":1,"featured_media":1488,"parent":0,"menu_order":84,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"categories":[20],"tags":[],"_links":{"self":[{"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/pages\/1484"}],"collection":[{"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1484"}],"version-history":[{"count":4,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/pages\/1484\/revisions"}],"predecessor-version":[{"id":1498,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/pages\/1484\/revisions\/1498"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=\/wp\/v2\/media\/1488"}],"wp:attachment":[{"href":"https:\/\/pa3csg.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1484"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1484"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pa3csg.nl\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1484"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}