{"schemaVersion":1,"slug":"wound-rotor-induction-motor","name":"Wound-rotor induction motor","kind":"symbol","abbreviation":"M WR","aliases":["HMO1M4","VMO1M4"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A wound-rotor induction motor includes a rotor winding arrangement with documented external connections.","description":["A wound-rotor induction motor includes a rotor winding arrangement with documented external connections. The schematic must identify the rotor circuit and any connected starting or control equipment."],"readingNotes":["Trace stator and rotor circuits as separate winding systems.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show stator connections","Identify rotor terminals","Reference rotor starter/control circuit"],"distinction":"A wound-rotor motor has an accessible rotor circuit unlike an ordinary cage-rotor representation.","facts":[{"label":"Drawing role","value":"Rotating or linear load"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HMO1M4, VMO1M4 (Autodesk identifiers; not IEC symbol numbers)"},{"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."}],"references":[{"sourceId":"autodesk-motors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["motor","contactor"],"artwork":"edu-wound-rotor-induction-motor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/wound-rotor-induction-motor","illustration":{"url":"https://eloragrid.ai/library/illustrations/wound-rotor-induction-motor.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":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}]}