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DIFF Subgroup
H02P 27/04

using variable-frequency supply voltage, e.g. inverter or converter supply voltage

Introduced: January 2006

Full Title

Full titles differ between systems:

IPC:

Arrangements or methods for the control of AC motors characterised by the kind of supply voltage > using variable-frequency supply voltage, e.g. inverter or converter supply voltage

CPC:

Arrangements or methods for the control of AC motors characterised by the kind of supply voltage (of two or more motors H02P5/00; of synchronous motors with electronic commutators H02P6/00; of DC motors H02P7/00; of stepping motors H02P8/00) > using variable-frequency supply voltage, e.g. inverter or converter supply voltage

Of 6 combined children, 4 exist in both systems.

2 codes are CPC-only extensions.

2 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 2006.

Child Classifications

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  • H02P 27/045 CPC only CPC only
  • H02P 27/047 CPC only CPC only
  • H02P 27/048 using AC supply for only the rotor circuit or only the stator circuit since 2016 IPC+CPC Available in IPC and CPC
  • H02P 27/05 using AC supply for both the rotor and the stator circuits, the frequency of supply to at least one circuit being variable since 2006 IPC+CPC Available in IPC and CPC