voltimum.co.uk

Q & A of the Day – How do loop testers work?

Our Voltimum Experts answer your questions on a daily basis in our Technical Expertise area. This Question of the Day, about electrical testing and how loop testers work, is answered by Kew Technik ...
IEEE

Frequency Scanning-Based Contributions Identification of Current Control Loop and PLL on DQ Impedance Characteristics of Three-Phase Grid-Connected Inverter

Abstract: Complex space vector and complex transfer function theory is used to theoretically establish the dq impedance model of current-controlled grid-connected inverter (GCI) with considering phase ...
IEEE

Consideration of Harmonic Coupling and Outer Loop Control in the Impedance Modeling of Doubly-Fed Induction Generators

Abstract: Oscillations in large-scale doubly-fed wind farms connected to the grid are frequent, prompting experts to investigate the instability issues in wind power grid integration. The sequence ...
EDN

What circuits textbooks haven’t told you about feedback amplifier and transistor port impedances

The recent EDN article of Bruce Trump () on the input impedance of an op-amp circuit took into account the single-pole roll-off of its loop gain. He showed with a simple derivation how the equivalent ...