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.


Electrical and Computer Engineering

Keywords and Phrases

Delta Modulation; Hysteresis; Computer Simulation; Electric Current Control; Electric Potential; Pulse Width Modulation; Robustness (Control Systems); Topology; Discontinuous Conduction Mode (DCM); Sensorless Current Mode (SCM); Voltage-Source Characteristics; Inductors; Switches; Voltage Control; Topology; Frequency Modulation

International Standard Serial Number (ISSN)

0885-8993; 1941-0107

Document Type

Article - Journal

Document Version

Final Version

File Type





© 2006 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jul 2006