IEEE / ANSI · HMO1M3

ANSI/IEEE Three-phase induction motor with series excitation form

IEEE-library form of three-phase induction motor with series excitation: this representation identifies the publisher's asynchronous motor form with series excitation.

In plain English

What does ANSI/IEEE Three-phase induction motor with series excitation form mean?

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.

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.

Identify the device and formRead the connections and stateCheck 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.

What the drawings help you do

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.

This particular reference

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.

Winding
A coil of conductor inside an electrical machine or transformer.
Phase
One of the related AC waveforms in a power system.
Terminal
An identified point where a conductor connects.

Read the source: Autodesk IEEE Symbol Preview — 3 Phase Motors

IEEE / ANSI · 3 Phase Asynchro Motor with Series Excitation

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.

Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.

SLD / Schematic · HMO1M3ANSI/IEEE Three-phase induction motor with series excitation form: original educational illustration
Original educational illustrationNot to scale · See source and graphic notes

What it represents

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.

How to read it

  • Document stator, excitation and any associated control connections separately.
  • The reference form does not identify a conventional squirrel-cage motor without an excitation circuit.

Information to show or reference

  • 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.

A distinction that matters

The reference form does not identify a conventional squirrel-cage motor without an excitation circuit.

Sources you can follow

These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.

Autodesk IEEE Symbol Preview — 3 Phase Motors

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.

Autodesk · Public reference checked 14 October 2026 · Link only

About this graphic

This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.

SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.

Entry JSON · Entry Markdown · Last editorial update: 28 October 2026

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