{"id":2829,"ia_identifier":"gov.dod.dimoc.39947","programme":"dod","naid":null,"local_identifier":null,"pin":"39947","title":"AC MOTORS","year":1969,"date_raw":"1969-01-01T00:00:00Z","creator":"Department of Defense","description":"Department of Defense PIN 39947 AC MOTORS 1969 AC MOTORS ARE SHOWN IN VARIOUS APPLIANCES AND ELECTRONIC EQUIPMENT TO EMPHASIZE THEIR WIDE USE AND IMPORTANCE. AN ACTUAL MOTOR IS DISASSEMBLED TO POINT OUT EACH PART AND THE SIMPLICITY OF CONSTRUCTION. THE PRINCIPLE OF OPERATION IS DEMONSTRATED, POINTING OUT THE MAGNETIC FIELD AND MAGNETIZATION OF THE ROTOR. A ROTATING MAGNETIC FIELD IS PRODUCED THROUGH A DEMONSTRATION. INDUCTION FROM ROTATING FIELD TO WIRE LOOPS IS DEMONSTRATED, FOLLOWED BY EXPLANATION OF HOW THE ROTOR IS MAGNETIZED. CONCLUDES WITH A DEMONSTRATION OF SLIPPAGE AND ITS RELATIONSHIP TO INTERNAL AND EXTERNAL LOADING, AND AN EXPLANATION OF A TYPICAL TORQUE CURVE..","licenseurl":"http://creativecommons.org/publicdomain/zero/1.0/","collections":["FedFlix","usgovfilms","newsandpublicaffairs","fav-bcvta","fav-benswenson","fav-downcount321","fav-fatonixs","fav-gmschroeder","fav-novacaine1661","fav-opresh","fav-paras_mahajan","fav-retiredscholar","fav-scottlawndart"],"ia_metadata":{"date":"1969-01-01T00:00:00Z","year":1969,"title":"AC MOTORS","creator":"Department of Defense","credits":"Uploaded by Public.Resource.Org","subject":["dod.gov","public.resource.org"],"collection":["FedFlix","usgovfilms","newsandpublicaffairs","fav-bcvta","fav-benswenson","fav-downcount321","fav-fatonixs","fav-gmschroeder","fav-novacaine1661","fav-opresh","fav-paras_mahajan","fav-retiredscholar","fav-scottlawndart"],"identifier":"gov.dod.dimoc.39947","licenseurl":"http://creativecommons.org/publicdomain/zero/1.0/","description":"Department of Defense PIN 39947 AC MOTORS 1969 AC MOTORS ARE SHOWN IN VARIOUS APPLIANCES AND ELECTRONIC EQUIPMENT TO EMPHASIZE THEIR WIDE USE AND IMPORTANCE. AN ACTUAL MOTOR IS DISASSEMBLED TO POINT OUT EACH PART AND THE SIMPLICITY OF CONSTRUCTION. THE PRINCIPLE OF OPERATION IS DEMONSTRATED, POINTING OUT THE MAGNETIC FIELD AND MAGNETIZATION OF THE ROTOR. A ROTATING MAGNETIC FIELD IS PRODUCED THROUGH A DEMONSTRATION. INDUCTION FROM ROTATING FIELD TO WIRE LOOPS IS DEMONSTRATED, FOLLOWED BY EXPLANATION OF HOW THE ROTOR IS MAGNETIZED. CONCLUDES WITH A DEMONSTRATION OF SLIPPAGE AND ITS RELATIONSHIP TO INTERNAL AND EXTERNAL LOADING, AND AN EXPLANATION OF A TYPICAL TORQUE CURVE.."},"status":"us-government-work","reason":"The record names a federal body as the creating agency: Department of Defense. A work prepared by an officer or employee of the United States Government as part of that person's official duties has no US copyright (17 U.S.C. 105; before 1978, section 8 of the 1909 Act).","flags":[],"loaded_at":"2026-09-05 16:13:42.607439+00:00","downloads":4108}