Permanent magnet speed regulator
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Those who have used permanent magnet speed regulators, share your experiences--
Just a thought: based on the analysis of speed control performance under various loads, permanent magnet speed regulators and frequency converters exhibit similar energy-saving effects. However, I have never seen any test reports from authoritative energy-saving agencies; has anyone prominent conducted such tests? Thank you.
If viewed only from the ammeter, the current in a permanent magnet system is higher than that in an inverter-driven system, because there is reactive power involved in the former, whereas the inverter can compensate for it.
It was still Magna that, during the early promotional phase, showcased experiments conducted at an American university on efficiency, permanent magnets, and variable frequency drives! Almost all permanent magnet manufacturers use this as a basis now! It should still be the data obtained after the actual permanent magnet modification that is used for a more accurate assessment! Personally, I think permanent magnet speed control is not the only function of permanent magnet products!
Regarding this product, some users have replaced the inverter with permanent magnets; their power consumption is similar, which was a bit surprising, but not too much.
Sliding rate is less than 4%, with efficiency over 96%； Large permanent-magnet eddy current motors have low efficiency, and water cooling consumes some of the energy. All other aspects are superior to variable frequency.
Regarding air compressors, permanent magnet motors must be equipped with frequency converters. Permanent magnet frequency converters are suitable for situations where there is frequent loading and unloading. Moreover, the technology related to high-power permanent magnet frequency drive motors is not yet mature; such motors consume a lot of electricity. Leading companies do not produce permanent magnet frequency drive devices with a capacity of over 75 kW. Additionally, the frequency converters themselves consume around 4% of the electricity
How long has water-cooling equipment been in actual use, and is it reliable?
The earliest example of a water-cooled permanent magnet system was the permanent magnet used in the condensate pump at Anhui Tianji Power Plant, which has been in operation since 2009. The condensate pump motor had a capacity of 2000 kW; it used Magna products, which were supplied by an agent at that time (the company now produces its own products after separating from that agent). Pan’s papers can be found on CNKI. Think about it, it’s been almost ten years.