Seeking advice on motor issues
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For ordinary motors, those that meet certain power \"standards\" are usually chosen, such as 5.5 kW, 7.5 kW, 11 kW, 13 kW, etc. What determines these standard values? Is it possible to select motors with values that do not meet the standard, such as 6KW or 6.2KW?
You can have it custom-made by the manufacturer, or else buy a broken one and wind it yourself!
It depends on the head and flow rate of the pump: 100 meters of head with a flow rate of 500 m³, or 10 meters of head with a flow rate of 5 m³?
If you provide the parameters to the manufacturer, they will help you make a choice; there are several configurations available for the same model of pump, such as power and speed.
Commonly available motors that meet the standards can be purchased from any manufacturer, but motors with special power requirements can only be custom-made, which results in much higher costs. It’s more cost-effective to use a motor with a slightly higher power rating.
You can take a look at the book \"Standards of the People’s Republic of China – Dimensions and Power Rating of Rotating Electrical Machines (GB/T4772.1-4772.3-1999)\”; it contains some relevant regulations
As specified by **standards, it allows manufacturers to produce non-standard products**
When determining the standard power of electric motors, consideration is given to the choice of speed grade, and when selecting a motor, a higher grade is generally preferred. Due to the manufacturers’ need for mass production, it is necessary that the power be within the standard specified range. If you need a customized version, the manufacturer can definitely produce it – there are no technical issues. However, since mass production isn’t possible, the production cost is very high. Of course, if you can afford it, the manufacturer will definitely be willing to do it. Hehe.