"Ylitolva, Kari" - Selaus tekijän mukaan Centria-ammattikorkeakoulu

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    • WARD LEONARD CONTROL SYSTEM 

      Ylitolva, Kari (Keski-Pohjanmaan ammattikorkeakoulu, 2011)
      Ever since electric motor drives have been invented, there has been a need for accurate speed control system for them. One solution for this problem was invented by Mr. H. Ward Leonard in 1891. It was a control system that ...