# ANSI/IEEE permanent-magnet synchronous generator symbol Canonical URL: https://eloragrid.ai/symbols/ansi-permanent-magnet-synchronous-generator Publisher: Elora Grid Updated: 2026-10-28 Lookup label: PMG Drawing use: SLD, Schematic Reference families: IEEE / ANSI, Manufacturer ## Symbol convention Convention: IEEE / ANSI Form: Autodesk IEEE-oriented 3 Phase Synchro Generator with Permanent Magnets functional form Autodesk publishes this block under its IEEE Symbol Preview for generators. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted. Related representation: [Permanent-magnet synchronous generator](https://eloragrid.ai/symbols/permanent-magnet-synchronous-generator) IEEE-oriented library form of a three-phase synchronous generator with permanent-magnet excitation, with reading notes. ## In plain English ### What does ANSI/IEEE permanent-magnet synchronous generator mean? This entry covers the permanent-magnet synchronous generator as it appears in an IEEE-oriented drawing library. The machine has a magnet rotor and no field winding, so output voltage rises with speed and cannot be trimmed by an excitation regulator; voltage control is done by the converter or by the load. ### A simple example Within IEEE-style one-line and schematic drawings the machine is a circle with the generator letter and a magnet indication, with three output leads. The block identifier quoted here is a vendor library name and only meaningful inside that library. This is a convention-specific lookup; the geometry is independently drawn and is not a certified reproduction of the standard graphic. ### What the drawings help you do Expect a converter or rectifier immediately downstream; a permanent-magnet machine rarely connects directly to a fixed-frequency bus. Read the vendor block name only within the library it belongs to. A permanent-magnet generator has no field winding to regulate; a wound-field synchronous generator has an exciter and regulator. ### This particular reference IEEE-oriented library form of a three-phase synchronous generator with permanent-magnet excitation, with reading notes. A permanent-magnet generator has no field winding to regulate; a wound-field synchronous generator has an exciter and regulator. ### Terms - Winding: A coil of conductor inside an electrical machine or transformer. - Normally open / normally closed: The contact state in the normal condition defined for the drawing. - Signal: Electrical information passed between devices, rather than necessarily the main power supply. 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 — Generators](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-6A9FA93B-3010-4274-AE51-20DB3520999C.htm) - [IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams](https://standards.ieee.org/ieee/315/515/) ## What it represents This entry covers the permanent-magnet synchronous generator as it appears in an IEEE-oriented drawing library. The machine has a magnet rotor and no field winding, so output voltage rises with speed and cannot be trimmed by an excitation regulator; voltage control is done by the converter or by the load. Within IEEE-style one-line and schematic drawings the machine is a circle with the generator letter and a magnet indication, with three output leads. The block identifier quoted here is a vendor library name and only meaningful inside that library. This is a convention-specific lookup; the geometry is independently drawn and is not a certified reproduction of the standard graphic. ## How to read it - Expect a converter or rectifier immediately downstream; a permanent-magnet machine rarely connects directly to a fixed-frequency bus. - Read the vendor block name only within the library it belongs to. ## Information to show or reference - State rated speed and voltage at that speed. - Show the converter or rectifier interface. - Cross-reference the counterpart IEC-style entry where both conventions are used. ## Important distinction A permanent-magnet generator has no field winding to regulate; a wound-field synchronous generator has an exciter and regulator. ## Facts - Convention evidence: Autodesk IEEE Symbol Preview, Generators - Public vendor block name: HPW1G6, VPW1G6 (Autodesk identifiers; not IEEE symbol numbers) - Standards context: IEEE/ANSI 315-1975 covers diagram graphics - Artwork scope: Original functional illustration; exact standard glyph and compliance are not certified ## Public references - [Autodesk IEEE Symbol Preview — Generators](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-6A9FA93B-3010-4274-AE51-20DB3520999C.htm) — Autodesk. Public IEEE-oriented generator category page listing the permanent-magnet synchronous generator block. - [IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams](https://standards.ieee.org/ieee/315/515/) — IEEE Standards Association. Graphic-symbol standards context; not a source of reproduced artwork. ## 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.