"rotary converter" meaning in English

{
  "forms": [
    {
      "form": "rotary converters",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "rotary converter (plural rotary converters)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Electrical engineering",
          "orig": "en:Electrical engineering",
          "parents": [
            "Electricity",
            "Engineering",
            "Electromagnetism",
            "Applied sciences",
            "Technology",
            "Physics",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              54,
              71
            ]
          ],
          "ref": "1954 April, “Southern Region Power Supply”, in Railway Magazine, pages 221-222:",
          "text": "It was decided therefore to change over from 25-cycle rotary converters to remotely-controlled substations supplied at 50 cycles, in conformity with the outer area electrification.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A machine which converts alternating current to direct current, or vice versa."
      ],
      "id": "en-rotary_converter-en-noun-SnjWhDCu",
      "links": [
        [
          "electrical engineering",
          "electrical engineering"
        ],
        [
          "alternating current",
          "alternating current"
        ],
        [
          "direct current",
          "direct current"
        ],
        [
          "vice versa",
          "vice versa"
        ]
      ],
      "raw_glosses": [
        "(electrical engineering, dated) A machine which converts alternating current to direct current, or vice versa."
      ],
      "tags": [
        "dated"
      ],
      "topics": [
        "business",
        "electrical",
        "electrical-engineering",
        "electricity",
        "electromagnetism",
        "energy",
        "engineering",
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "word": "rotary converter"
}

{
  "forms": [
    {
      "form": "rotary converters",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "rotary converter (plural rotary converters)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English dated terms",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Electrical engineering"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              54,
              71
            ]
          ],
          "ref": "1954 April, “Southern Region Power Supply”, in Railway Magazine, pages 221-222:",
          "text": "It was decided therefore to change over from 25-cycle rotary converters to remotely-controlled substations supplied at 50 cycles, in conformity with the outer area electrification.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A machine which converts alternating current to direct current, or vice versa."
      ],
      "links": [
        [
          "electrical engineering",
          "electrical engineering"
        ],
        [
          "alternating current",
          "alternating current"
        ],
        [
          "direct current",
          "direct current"
        ],
        [
          "vice versa",
          "vice versa"
        ]
      ],
      "raw_glosses": [
        "(electrical engineering, dated) A machine which converts alternating current to direct current, or vice versa."
      ],
      "tags": [
        "dated"
      ],
      "topics": [
        "business",
        "electrical",
        "electrical-engineering",
        "electricity",
        "electromagnetism",
        "energy",
        "engineering",
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "word": "rotary converter"
}