# Three-phase synchronous motor

Canonical URL: https://eloragrid.ai/symbols/three-phase-synchronous-motor
Publisher: Elora Grid
Updated: 2026-10-13
Lookup label: M 3PH SYNC
Drawing use: SLD, Schematic
Reference families: IEC, Manufacturer

A synchronous motor operates with a documented synchronous relationship to the electrical supply.

## What it represents

A synchronous motor operates with a documented synchronous relationship to the electrical supply. Its excitation arrangement and starting/control system require device-specific information.

## How to read it

- Identify any field or excitation supply separately from the main stator circuit.
- The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation.

## Information to show or reference

- State motor rating
- Show excitation reference
- Link starting and protection circuits

## Important distinction

Synchronous operation is different from an induction motor's operating principle.

## Facts

- Drawing role: Rotating or linear load
- Representation scope: Functional concept; not an official standard graphic or a product footprint
- Public vendor block reference: HMO1M17, VMO1M17 (Autodesk identifiers; not IEC symbol numbers)
- Identifier status: 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.

## Public references

- [Three-phase motor symbol variants](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-385CBE83-33A3-4314-913E-3B59A6D05F22.htm) — Autodesk. Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source 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.