{"schemaVersion":1,"slug":"ansi-three-phase-induction-motor-with-series-excitation","name":"ANSI/IEEE Three-phase induction motor with series excitation form","kind":"symbol","abbreviation":"HMO1M3","aliases":["HMO1M3","VMO1M3","IEEE 3 Phase Asynchro Motor with Series Excitation","ANSI Three-phase induction motor with series excitation"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-library form of three-phase induction motor with series excitation: this representation identifies the publisher's asynchronous motor form with series excitation.","description":["This reference locates three-phase induction motor with series excitation in Autodesk's IEEE-oriented 3 phase motors family. This representation identifies the publisher's asynchronous motor form with series excitation. The public library uses HMO1M3 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.","Document stator, excitation and any associated control connections separately. The reference form does not identify a conventional squirrel-cage motor without an excitation circuit. Document stator, excitation and any associated control connections separately. The reference form does not identify a conventional squirrel-cage motor without an excitation circuit. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted."],"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":"Convention evidence","value":"Autodesk IEEE Symbol Preview: 3 Phase Motors; published form: 3 Phase Asynchro Motor with Series Excitation."},{"label":"Public vendor block","value":"HMO1M3. Vendor library token, not an IEEE symbol number."},{"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"},{"label":"Artwork scope","value":"Original educational geometry. Exact standard graphics, product ratings and terminal pinouts are not certified."}],"references":[{"sourceId":"ansi-autodesk-392101fd-a88c-4bac-96cd-1c676094c262","relevance":"Public IEEE-oriented 3 Phase Motors table explicitly lists HMO1M3 as 3 Phase Asynchro Motor with Series Excitation. This supports the vendor convention context, not reproduction of the publisher graphic."}],"related":["iec-three-phase-induction-motor-with-series-excitation","motor","generator"],"artwork":"s28-ansi-three-phase-induction-motor-with-series-excitation","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"3 Phase Asynchro Motor with Series Excitation","reference":"Autodesk IEEE Symbol Preview: 3 Phase Motors, block HMO1M3. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier.","counterpart":"iec-three-phase-induction-motor-with-series-excitation"},"plainEnglish":{"title":"What does ANSI/IEEE Three-phase induction motor with series excitation form mean?","introduction":"This reference locates three-phase induction motor with series excitation in Autodesk's IEEE-oriented 3 phase motors family. This representation identifies the publisher's asynchronous motor form with series excitation. The public library uses HMO1M3 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":"Document stator, excitation and any associated control connections separately. The reference form does not identify a conventional squirrel-cage motor without an excitation circuit. Document stator, excitation and any associated control connections separately. The reference form does not identify a conventional squirrel-cage motor without an excitation circuit. 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":"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."},{"name":"Terminal","meaning":"An identified point where a conductor connects."}],"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 — 3 Phase Motors","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-392101FD-A88C-4BAC-96CD-1C676094C262.htm"}],"detail":"IEEE-library form of three-phase induction motor with series excitation: this representation identifies the publisher's asynchronous motor form with series excitation. The reference form does not identify a conventional squirrel-cage motor without an excitation circuit.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/ansi-three-phase-induction-motor-with-series-excitation","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/ansi-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":"ansi-autodesk-392101fd-a88c-4bac-96cd-1c676094c262","title":"Autodesk IEEE Symbol Preview — 3 Phase Motors","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-392101FD-A88C-4BAC-96CD-1C676094C262.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 3 Phase Motors table explicitly lists HMO1M3 as 3 Phase Asynchro Motor with Series Excitation. This supports the vendor convention context, not reproduction of the publisher graphic."}]}