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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In Discussion
HT board tripping ckt
Currents in Y Phase connected to motor.
SMPS with front end PFC in parallel
Sludge and Sediment Problem in Transformer
Reduce the cost of solar panels
Remedial Action Schemes or Special Protection Schemes
How and why eddy currents are formed in generators?
Everyone says or knows NPSHA should be greater then NPSHR
Currents in Y Phase connected to motor.
SMPS with front end PFC in parallel
Sludge and Sediment Problem in Transformer
Reduce the cost of solar panels
Remedial Action Schemes or Special Protection Schemes
How and why eddy currents are formed in generators?
Everyone says or knows NPSHA should be greater then NPSHR