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Robust Synchronous Reference Frame Phase-Looked Loop (PLL) with Feed-Forward Frequency Estimation
Announce Type: replace Abstract: Synchronous reference frame phase-locked loop (SRF-PLL) techniques are widely used for interfacing and control applications in the power systems and energy conversion at large. Since a PLL system synchronizes its output with an exogenous harmonic signal, often 3-phases voltage or current, the locking of the frequency and phase angle depends on the performance of the feedback loop with at least two integrator terms, and on the distortions of the measured input...
PLL Power Rankings ahead of Week 4: Why the Outlaw...
Week 4 of the Premier Lacrosse League's 2026 season is coming up this weekend in Charlotte. The Whipsnakes are on top of the standings with a 3-1 record, with the Outlaws and Chaos right behind them at 2-1. Is that how they line up in the Power Rankings?
PLL/WLL Week 4 preview: Key players, stats and sto...
Week 4 of the 2026 Premier Lacrosse League season is June 5-6, as the league heads to American Legion Memorial Stadium in Charlotte. Four PLL games are on the schedule on Friday and Saturday, and the Carolina Chaos have one game each day. The 2026 WLL season also continues, as the Boston Guard take on the California Palms.
Transferring the driveshaft inertia to the grid via the DC-link in MV drive systems
arXiv:2508.21760v2 Announce Type: replace Abstract: This paper investigates a control approach that renders the driveshaft inertia completely available on the grid side and enhances the fault ride-through behavior of medium-voltage (MV) drive systems. Two main contributions are presented. First, we show how the rotational inertia of the driveline shaft can be synchronously coupled to the grid through a modification of the speed control reference signal and through an adapted DC-link control...
Porting the ThinkPad X61 to Coreboot
Porting the ThinkPad x61 to coreboot Table of Contents An introduction to my IBM/Lenovo ThinkPad addiction Over 10 years ago I got my first ThinkPad x60. I got interested in free software by reading the about GNU page in the GNU Emacs editor. Free software back then and certainly now is quite usable, typically without much closed-source software.