Digital Control of High-Frequency Switched-Mode Power Converters (IEEE Press Series on Power Engineering) by Corradini Luca & Maksimović Dragan & Mattavelli Paolo & Zane Regan

Author:Corradini, Luca & Maksimović, Dragan & Mattavelli, Paolo & Zane, Regan [Corradini, Luca]
Language: eng
Format: azw3
ISBN: 9781119025375
Publisher: Wiley
Published: 2015-07-09T16:00:00+00:00

Figure 4.34 Saturated integrator.

A common choice is , so that the integral term never exceeds the steady-state range of operation. Figure 4.35 compares the 0 A10 A step-load responses with and without the integral saturation provision. The settling time of the transient is substantially improved.

Figure 4.35 Synchronous Buck example: effect of saturation of the integrator state variable.

Detrimental effects of the actuator saturation can further be exemplified in the multiloop control example of Section 4.2.3. The block diagram of Fig. 4.36 highlights two saturation blocks present in the system. One is, similar to the voltage-mode control case discussed earlier, the inherent saturation of the control command . The second saturation block is intentionally introduced to limit the current loop setpoint , which provides a useful limitation of the inductor current. Note, however, that this is a soft inductor current limitation because is only limited to the extent that it follows , that is, within the current loop bandwidth.

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.