Negative input-resistance compensator for a constant power load

Xinyun Liu, Andrew J. Forsyth, Andrew M. Cross

Research output: Contribution to journalArticlepeer-review


A negative input-resistance compensator is designed to stabilize a power electronic brushless dc motor drive with constant power-load characteristics. The strategy is to feed a portion of the changes in the dc-link voltage into the current control loop to modify the system input impedance in the midfrequency range and thereby to damp the input filter. The design process of the compensator and the selection of parameters are described. The impact of the compensator is examined on the motor-controller performance, and finally, the effectiveness of the controller is verified by simulation and experimental testing.
Original languageEnglish
Pages (from-to)3188-3196
Number of pages9
JournalIEEE Transactions on Industrial Electronics
Issue number6
Early online date12 Nov 2007
Publication statusPublished - Dec 2007


  • DC motor drives
  • brushless DC motors
  • power electronics
  • brushless dc motor drive
  • constant power load
  • current control loop
  • dc-link voltage
  • negative input-resistance compensator
  • power electronic
  • capacitors
  • DC motors
  • filters
  • impedance
  • inductance
  • inverters
  • motor drives
  • transfer functions
  • negative input-impedance instability


Dive into the research topics of 'Negative input-resistance compensator for a constant power load'. Together they form a unique fingerprint.

Cite this