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DIFF Subgroup
H02P 21/14

Estimation or adaptation of machine parameters, e.g. flux, current or voltage

Introduced: January 2006

Full Title

Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation > Estimation or adaptation of machine parameters, e.g. flux, current or voltage

Of 5 combined children, 3 exist in both systems.

2 codes are CPC-only extensions.

IPC defines codes here since 2016.

Child Classifications

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  • H02P 21/141 CPC only CPC only
  • H02P 21/143 CPC only CPC only
  • H02P 21/16 Estimation of constants, e.g. the rotor time constant since 2016 IPC+CPC Available in IPC and CPC
  • H02P 21/18 Estimation of position or speed since 2016 IPC+CPC Available in IPC and CPC
  • H02P 21/20 Estimation of torque since 2016 IPC+CPC Available in IPC and CPC