Hysteresis and delta modulation control of converters using sensorless current mode

Jonathan W. Kimball, Philip T. Krein, Yongxiang Chen

Research output: Contribution to journalArticlepeer-review


Sensorless current mode (SCM) is a control formulation for dc-dc converters that results in voltage-source characteristics, excellent open-loop tracking, and near-ideal source rejection. Hysteresis and delta modulation are well-known, easy-to-construct large-signal methods for switched systems. Combining either large-signal method with SCM creates a controller that is simpler and more robust than a pulse-width modulation (PWM) based controller. The small-signal advantages of PWM-based SCM are retained and expanded to include converter response to large-signal disturbances. These approaches can be used with any converter topology over a broad range of operating conditions. In the present work, hysteresis and delta modulation SCM controllers are derived and simulated. Extensive experimental results demonstrate the large-signal behavior of both control schemes.

Original languageEnglish (US)
Pages (from-to)1154-1158
Number of pages5
JournalIEEE Transactions on Power Electronics
Issue number4
StatePublished - Jul 2006


  • Delta Modulation
  • Discontinuous conduction mode (DCM)
  • Hysteresis
  • Sensorless current mode (SCM)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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