{"schemaVersion":1,"slug":"ansi-separately-excited-dc-motor","name":"ANSI/IEEE Separately excited DC motor form","kind":"symbol","abbreviation":"M DC SEP","aliases":["HMO1M12","VMO1M12","IEEE DC Motor - Independent Excitation","ANSI Separately excited DC motor"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-library form of separately excited dc motor: a separately excited DC motor has a documented field circuit supplied separately from the armature circuit.","description":["This reference locates separately excited dc motor in Autodesk's IEEE-oriented dc motors family. A separately excited DC motor has a documented field circuit supplied separately from the armature circuit. The schematic must show both supplies and their relevant controls. The public library uses HMO1M12 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.","Trace each winding, supply and accessible neutral through the complete machine or transformer connection diagram. Keep the phase arrangement, terminal labels and any clock notation attached to the device; neither the convention label nor this educational outline supplies its ratings.","Trace the field source independently from armature power. Separately excited and series-excited motors do not share the same field-current path. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted."],"readingNotes":["Trace the field source independently from armature power.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify field supply","Identify armature supply","Reference coordinated control sequence"],"distinction":"Separately excited and series-excited motors do not share the same field-current path.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview: DC Motors; published form: DC Motor - Independent Excitation."},{"label":"Public vendor block","value":"HMO1M12. Vendor library token, not an IEEE symbol number."},{"label":"Drawing role","value":"Rotating or linear load"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."},{"label":"Artwork scope","value":"Original educational geometry. Exact standard graphics, product ratings and terminal pinouts are not certified."}],"references":[{"sourceId":"ansi-autodesk-6a65d995-18bc-4a3c-a34e-c6bb276e8410","relevance":"Public IEEE-oriented DC Motors table explicitly lists HMO1M12 as DC Motor - Independent Excitation. This supports the vendor convention context, not reproduction of the publisher graphic."}],"related":["separately-excited-dc-motor","motor","contactor"],"artwork":"s28-ansi-separately-excited-dc-motor","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"DC Motor - Independent Excitation","reference":"Autodesk IEEE Symbol Preview: DC Motors, block HMO1M12. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier.","counterpart":"separately-excited-dc-motor"},"plainEnglish":{"title":"What does ANSI/IEEE Separately excited DC motor form mean?","introduction":"This reference locates separately excited dc motor in Autodesk's IEEE-oriented dc motors family. A separately excited DC motor has a documented field circuit supplied separately from the armature circuit. The schematic must show both supplies and their relevant controls. The public library uses HMO1M12 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.","example":"Trace each winding, supply and accessible neutral through the complete machine or transformer connection diagram. Keep the phase arrangement, terminal labels and any clock notation attached to the device; neither the convention label nor this educational outline supplies its ratings.","drawings":"Trace the field source independently from armature power. Separately excited and series-excited motors do not share the same field-current path. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted.","terms":[{"name":"DC","meaning":"Direct current: electricity flowing in one direction."},{"name":"Winding","meaning":"A coil of conductor inside an electrical machine or transformer."},{"name":"Phase","meaning":"One of the related AC waveforms in a power system."}],"diagram":"flow","steps":["Identify the device and form","Read the connections and state","Check the equipment reference"],"caption":"A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.","sources":[{"label":"Autodesk IEEE Symbol Preview — DC Motors","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-6A65D995-18BC-4A3C-A34E-C6BB276E8410.htm"}],"detail":"IEEE-library form of separately excited dc motor: a separately excited DC motor has a documented field circuit supplied separately from the armature circuit. Separately excited and series-excited motors do not share the same field-current path.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/ansi-separately-excited-dc-motor","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/ansi-separately-excited-dc-motor.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"ansi-autodesk-6a65d995-18bc-4a3c-a34e-c6bb276e8410","title":"Autodesk IEEE Symbol Preview — DC Motors","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-6A65D995-18BC-4A3C-A34E-C6BB276E8410.htm","type":"cad-reference","scope":"Verified public IEEE-oriented vendor catalogue. Block names identify vendor symbols, not IEEE standard symbol numbers. Linked only; graphics and CAD files are not redistributed. IEEE/ANSI 315-1975 is a historical graphics reference with Inactive-Reserved status; this page does not certify current standards compliance.","checkedOn":"2026-10-14","reuse":"link-only","relevance":"Public IEEE-oriented DC Motors table explicitly lists HMO1M12 as DC Motor - Independent Excitation. This supports the vendor convention context, not reproduction of the publisher graphic."}]}