Table 7 Comparison of stability analysis in digital domain of BBC in buck mode of operation
System | PM (degrees) | GM (db) | ωg (rad/s) | ωp (rad/s) | Delay margin (samples) | Stability state |
|---|---|---|---|---|---|---|
Open loop (digital_withoutpid) | Inf | Inf | Inf | Inf | Inf | Stable with poor dynamic response |
PID control (digital_PID_Cloop) | 129 | 4.82 and 308 | 31.4 | 30.3 | 0.743 | Stable with good dynamic response |
PIDN control (digital_PIDN_Cloop) | 122 | 41.1 and 301 | 31.3 and 31.4 | 30.3 | 0.7 | Better stable with good dynamic response |