Some views on permanent magnet speed regulators
Thread Content
The permanent magnet speed regulator is a good product in its own right, with unique advantages in certain fields. Abroad, it is used as a safety device, with energy savings being only a secondary function; its characteristics were changed as soon as it was introduced to China, and it was promoted and used as an energy-saving product, with its energy-saving efficiency being compared to that of variable frequency drives and hydraulic couplings. Currently, several of the major domestic manufacturers of permanent magnet speed regulators claim that they offer high energy efficiency, can replace variable frequency drives and hydraulic couplings, require no maintenance, and have low investment costs – but this is complete nonsense! The unit doesn’t have any extra capacity, so how can there be any energy-saving benefits? Variable frequency drives and hydraulic couplings also have their own unique functions and won’t be replaced. Additionally, domestic manufacturers set prices that are far too high—much higher than those of variable frequency drives. As for maintenance costs, when components such as seals or bearings fail, it’s necessary to send the unit back to the manufacturer for repair. Moreover, there are defects in the design of these domestic products, resulting in high failure rates and high maintenance costs—something that users and distributors who have used them know all too well! Some manufacturers always use the excuse of inadequate maintenance when their equipment malfunctions; it seems that unless something is done to improve permanent magnet speed controllers, they might in the future serve only as decorative items. The above are merely personal opinions; fellow sailors, feel free to share any other views you have.
I fairly agree with the original poster’s view; it is indeed a bit exaggerated. . . . . .
Permanent magnet speed control is indeed expensive; ten years ago, a permanent magnet speed control coupling for a fan cost 50 watts, and it’s unclear what the current market situation is
The price has dropped now, but some fundamental problems remain unsolved.
What is the principle behind permanent magnet speed control, and how does it enable energy savings?
For a more comprehensive explanation of the principle, search on Baidu; energy savings depend on the degree of capacity surplus in the power generation unit
The original poster is being a bit generalistic; the failure rates can be analyzed by everyone. The costs associated with permanent magnets are definitely lower than the maintenance costs of variable frequency drives (especially high-voltage ones). Moreover, purely mechanical components are, after all, far more reliable than the thousands of components on a PCB board. The development of permanent magnet manufacturers is still in its initial stage; back in 2010, it could be said that permanent magnets had a high failure rate. By 2020, people should be able to see progress.
Agree with the person above; it’s more objective. What the original poster said is a bit biased. “Abroad, it is used as a safety device, with energy savings being only a secondary function. As early as 2010, such products as the Magna Driver were available abroad; torque-limiting permanent magnet couplings are used as safety devices to replace torque-limiting hydraulic couplings. Permanent magnet speed regulators are used for energy saving. I entered this industry in 2010; I was originally going to go to the United States for an inspection, but I didn’t go because I started working late. The company acts as the general agent; we handle all domestic products, and they are indeed not yet mature (it’s not that the design of domestic products has flaws – it’s the American designs that have issues). At that time, it was necessary to make changes according to the Americans’ requirements; one couldn’t modify the designs on their own, otherwise no action would be taken. There was once a case like this, and in the end I modified the design, and things got fixed. As the saying goes, know your enemy and know yourself; that’s why we modified the design. Of course, in our country everyone rushes to do it; it’s mechanical products after all – just buy one, do some measurement, and go ahead with manufacturing, without caring about design at all. Design? It doesn’t exist. It’s no wonder then that there’s a mix of good and bad elements. There are also those who are working hard at it; my old friends have done really well, and their business has grown over time – they earn tens of millions per year, which is considered quite substantial in China. Wolverine, I’m quite optimistic about him:victory:
Hello. I see that you’re an expert in permanent magnet speed control; I will need to consult you more often regarding issues related to this field.