# ANSI/IEEE Permanent-magnet stepping motor form Canonical URL: https://eloragrid.ai/symbols/ansi-permanent-magnet-stepping-motor Publisher: Elora Grid Updated: 2026-10-28 Lookup label: HMO1M15 Drawing use: SLD, Schematic Reference families: IEEE / ANSI, Manufacturer ## Symbol convention Convention: IEEE / ANSI Form: DC Motor - Stepping with Permanent Magnets Autodesk IEEE Symbol Preview: DC Motors, block HMO1M15. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier. Related representation: [Permanent-magnet stepping motor](https://eloragrid.ai/symbols/iec-permanent-magnet-stepping-motor) IEEE-library form of permanent-magnet stepping motor: this representation identifies a permanent-magnet stepping-motor function. ## In plain English ### What does ANSI/IEEE Permanent-magnet stepping motor form mean? This reference locates permanent-magnet stepping motor in Autodesk's IEEE-oriented dc motors family. This representation identifies a permanent-magnet stepping-motor function. The public library uses HMO1M15 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number. ### A simple 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. ### What the drawings help you do Cross-reference the phase/drive connections and the specified step-control interface. A stepping motor requires a drive sequence rather than an ordinary continuously applied DC supply assumption. Cross-reference the phase/drive connections and the specified step-control interface. A stepping motor requires a drive sequence rather than an ordinary continuously applied DC supply assumption. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted. ### This particular reference IEEE-library form of permanent-magnet stepping motor: this representation identifies a permanent-magnet stepping-motor function. A stepping motor requires a drive sequence rather than an ordinary continuously applied DC supply assumption. ### Terms - DC: Direct current: electricity flowing in one direction. - Winding: A coil of conductor inside an electrical machine or transformer. - Phase: One of the related AC waveforms in a power system. Concept diagram: Identify the device and form → Read the connections and state → Check the equipment reference A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram. - [Autodesk IEEE Symbol Preview — DC Motors](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-6A65D995-18BC-4A3C-A34E-C6BB276E8410.htm) ## What it represents This reference locates permanent-magnet stepping motor in Autodesk's IEEE-oriented dc motors family. This representation identifies a permanent-magnet stepping-motor function. The public library uses HMO1M15 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. Cross-reference the phase/drive connections and the specified step-control interface. A stepping motor requires a drive sequence rather than an ordinary continuously applied DC supply assumption. Cross-reference the phase/drive connections and the specified step-control interface. A stepping motor requires a drive sequence rather than an ordinary continuously applied DC supply assumption. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted. ## How to read it - Cross-reference the phase/drive connections and the specified step-control interface. - A stepping motor requires a drive sequence rather than an ordinary continuously applied DC supply assumption. ## Information to show or reference - Identify the associated device, circuit or diagram boundary. - Cross-reference the phase/drive connections and the specified step-control interface. - Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form. ## Important distinction A stepping motor requires a drive sequence rather than an ordinary continuously applied DC supply assumption. ## Facts - Convention evidence: Autodesk IEEE Symbol Preview: DC Motors; published form: DC Motor - Stepping with Permanent Magnets. - Public vendor block: HMO1M15. Vendor library token, not an IEEE symbol number. - Information added: Cross-reference the phase/drive connections and the specified step-control interface. - Preview: Independent educational concept; consult the publisher and applicable standard for the exact graphic - Artwork scope: Original educational geometry. Exact standard graphics, product ratings and terminal pinouts are not certified. ## Public references - [Autodesk IEEE Symbol Preview — DC Motors](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-6A65D995-18BC-4A3C-A34E-C6BB276E8410.htm) — Autodesk. Public IEEE-oriented DC Motors table explicitly lists HMO1M15 as DC Motor - Stepping with Permanent Magnets. This supports the vendor convention context, not reproduction of the publisher graphic. ## Graphic scope Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.