Always the top brands will be the most popular and over many years it is my opinion that this is because of their marketing strategy, history, reputation and worldwide acceptance more than any other reasons. This does not mean they are better or worse in any way, just means they are more accepted world wide and more people are experienced with their software. Thus there is some security for the owner in respect to programmer support or future resources etc (people come, people go) and a basis on which management may dictate what hardware is used. There is also the consideration on the capital outlay for programming software which can be very expensive.
Quality frequency inverters incorporate either an AC Reactor or DC Reactor (choke). Their inclusion in the basic design of the frequency inverter allows the design engineer to maximize the advantages of the choke. Their function is to reduce the current distortion caused by the input stage rectifiers by slowing the rate of change of current, and thus charging the internal capacitor at a slower rate over a longer time.

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Controlling exotherm in a batch reactor using cooling water
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solar cell to module conversion loss
In case Copper, annealed soft-drawn...
What are 3 of the biggest risks when investing in PV energy?
Looking for 4 Mw PV modules 250Wp poly EU production
What's the alternative for a solar system?
Controlling exotherm in a batch reactor using cooling water
Rated and Normal pump flow
solar cell to module conversion loss