Harmonic calculation versus network harmonic study As our regular reader you already have a solid knowledge about network harmonics caused by non-linear power electronic systems. It does not surprise you that network might have resonance(s) – a topic that needs to be addressed. Also, you are familiar with harmonic footprint Read more…
Active harmonic mitigation with AFE drives In this article we will once again touch the topic of grid side harmonics, particularly focusing on active harmonic mitigation with AFE drives. Abbreviations used: AFE = Active Front End APF = Active Power Filter ASD = Adjustable Speed Drive (synonym to VFD) DFE Read more…
Energy saving study: Special promotion (limited) Take an advantage of our limited offer and get a free-of-charge support for an energy saving study. Together we will assess the energy and cost saving potential resulting from the use of a variable frequency drive (VFD). The analysis will be performed specifically for Read more…
Tap changer: Yes or No? Shall a VFD transformer be equipped with a tap changer? What are the pros and cons of a tap changer on converter duty transformer? What kind of tap changer shall be used? How many taps does the VFD transformer have? This and more in our Read more…
Prague metro EN: Prague metro / CZ: Pražské metro We invite you on a short excursion of Prague metro – discover with us the backbone of the transportation system of the city of Prague. Efficient public transportation system is a contributor to quality of life. Means of public transportation shall Read more…