3809980

Information

• Patent Grant
• 3809980

• References
• Source

• Patent Number

  3,809,980

• Date Filed

  Not available

• Date Issued

  Tuesday, May 7, 1974
  50 years ago

• CPC

  • H03F9/02 - current-controlled
  • H01F30/14 - for changing the number of phases
  • H02J3/1885 - using rotating means
  • H02M5/16 - for conversion of frequency
  • H01F2029/143 - with control winding for generating magnetic bias
  • Y02E40/32 - using synchronous generators

• US Classifications

  • 318 - Electricity: motive power systems
  • 323 - Electricity: power supply or regulation systems
  • 363 - Electric power conversion systems