Side-by-side reference

Understand the difference.

Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.

First referenceCompare with

M DC PM

IEEE / ANSI

ANSI/IEEE permanent-magnet dc motor symbol

The permanent-magnet DC motor form identifies a machine using a permanent magnetic field. Its electrical drawing focuses on armature and control connections while mechanical motor data establishes the driven application and rating.

Drawing use: SLD / Schematic
Application: Power distribution
Reference family: IEEE / ANSI / Manufacturer
Form evidence: Autodesk IEEE-oriented DC Motors functional form. Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted.

A distinction that matters

Permanent-magnet excitation differs from a separately excited electrical field winding.

Full reference

M DC PM

Symbols

Permanent-magnet DC motor

A permanent-magnet DC motor uses a permanent magnetic field rather than a separately connected field winding. Its armature and control connections still require product documentation.

Drawing use: SLD / Schematic
Application: Power distribution
Reference family: IEC / Manufacturer

A distinction that matters

Permanent-magnet construction differs from a separately excited DC field winding.

Full reference

Original educational previews. Follow the source references on each full entry for the appropriate standard or selected product.