{
  "$schema": "https://ps-wiki.github.io/schema/v1/term.schema.json",
  "id": "synchronous-machine",
  "title": "Synchronous Machine",
  "description": "SM. An AC electrical machine operated with a constant electromagnetic field.",
  "language": "en",
  "tags": [
    "ieee",
    "ieee-standard"
  ],
  "related": [],
  "breaking": false,
  "dates": {
    "created": "2025-03-15",
    "last_modified": "2025-06-20"
  },
  "authors": [
    {
      "name": "Jinning Wang",
      "url": "https://jinningwang.github.io"
    }
  ],
  "content": {
    "sections": [
      {
        "order": 1,
        "id": "definition-in-an-ieee-standard",
        "title": "Definition in an IEEE Standard",
        "type": "definition",
        "source_keys": [
          "ieee2025std2988"
        ],
        "page": "p15",
        "body_md": "> A synchronous machine is an ac electrical machine operated with a constant electromagnetic field. Its instantaneous speed of normal operation is exactly proportional to the frequency of its ac voltage.\n> An SM with a round rotor has a uniform air gap, so that the reluctance does not depend on the flux position. Contrarily, the air gap of an SM with a salient-pole rotor varies circumferentially around the rotor, resulting in a non-uniform reluctance.\n"
      }
    ]
  }
}