trans·form·er /træn(t)sˈfɔrmɚ/
  變壓器,使變化的人
  transformer
  自耦變壓器	ATR
  transformer
  變換器 變壓器
  Trans·form·er n.
  1. One who, or that which, transforms. Specif. Elec., an apparatus for producing from a given electrical current another current of different voltage.
  -- Multiple transformer. Elec. (a) A transformer connected in multiple or in parallel with the primary circuit. (b) A transformer with more than one primary or more than one secondary coil.
  Parallel transformer Elec., a transformer connected in parallel.
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  transformer
       n : an electrical device by which alternating current of one
           voltage is changed to another voltage