G 3PH PM
Permanent-magnet synchronous generator
A permanent-magnet synchronous generator provides an AC source using a permanent magnetic excitation system.
SLD / Schematic
IEEE / ANSI · PMG
ANSI/IEEE permanent-magnet synchronous generator symbol
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.
- 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.
Read the source: Autodesk IEEE Symbol Preview — Generators · IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams
IEEE / ANSI · 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.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
SLD / Schematic · PMG
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.
A distinction that matters
A permanent-magnet generator has no field winding to regulate; a wound-field synchronous generator has an exciter and regulator.
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 — Generators
Public IEEE-oriented generator category page listing the permanent-magnet synchronous generator block.
IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams
Graphic-symbol standards context; not a source of reproduced artwork.
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.
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