{"schemaVersion":1,"slug":"iec-three-phase-induction-motor-with-series-excitation","name":"Three-phase induction motor with series excitation","kind":"symbol","abbreviation":"HMO1M3","aliases":["Three-phase induction motor with series excitation symbol","HMO1M3","Three-phase induction motor with series excitation IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies the publisher's asynchronous motor form with series excitation.","description":["This representation identifies the publisher's asynchronous motor form with series excitation.","Document stator, excitation and any associated control connections separately.","The reference form does not identify a conventional squirrel-cage motor without an excitation circuit."],"readingNotes":["Document stator, excitation and any associated control connections separately.","The reference form does not identify a conventional squirrel-cage motor without an excitation circuit."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Document stator, excitation and any associated control connections separately.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The reference form does not identify a conventional squirrel-cage motor without an excitation circuit.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HMO1M3 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Document stator, excitation and any associated control connections separately."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"autodesk-motors","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["motor","generator"],"artwork":"edu-iec-three-phase-induction-motor-with-series-excitation","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Three-phase induction motor with series excitation","reference":"Autodesk IEC-60617 Symbol Preview — Three-phase motor forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-three-phase-induction-motor-with-series-excitation","illustration":{"url":"https://eloragrid.ai/library/illustrations/iec-three-phase-induction-motor-with-series-excitation.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"autodesk-motors","title":"Three-phase motor symbol variants","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-385CBE83-33A3-4314-913E-3B59A6D05F22.htm","type":"cad-reference","scope":"Motor variants including asynchronous, synchronous and connection-count differences.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}]}