Calculation of the number of poles for 40*20*10 mm magnets
Dear Mr. leader of your esteemed company and all valued colleagues!
Thank you for your question! This is an absolutely correct and important stage of generator design.
A direct answer to your question:
The magnet size alone (40*20*10 mm) is not enough to unambiguously determine the final number of poles. This number is the result of a complex calculation and depends on several key parameters:
Inner diameter of the stator (Ø stator): This is the main determining factor. The larger the diameter, the more magnets can be placed around the circumference.
Required current frequency: The number of poles directly affects the frequency of the alternating current. For a 48 V system, we usually choose it for the optimal speed.
Required voltage and torque: These parameters also affect the choice of design.
How we calculate the number of poles for your project:
Based on the agreed stator diameter (about 500 mm), we calculate its circumference.
For magnets measuring 40*20*10 mm, the key dimension is 40 mm (the length that will “work” in the magnetic system).
We calculate how many such magnets can be evenly placed on the rotor, taking into account the technological gap between them.
Each magnet represents one pole (for example, north). The magnet following it will be the opposite pole (south). Thus, a pair of magnets (north-south) forms one pair of poles.
Preliminary calculation for your case:
With a rotor diameter of ~500 mm, the circumference will be ~1570 mm.
By placing magnets 40 mm long with a gap (for example, 5-10 mm), we can place about 30-35 magnets.
So, your generator pole count will most likely be in the range of 30 to 35.
Our next steps:
To ensure you receive an accurate and production-ready calculation, our team of engineers will perform for you:
Accurate electromagnetic calculation in specialized software (e.g. FEMM, ANSYS Maxwell).
Optimization of the pole count for your target RPM and output voltage.
Provide a 3D model showing the exact location of all magnets and poles.
For this, we need your final confirmation of the exact stator inner diameter.
We are ready to start these calculations within 24 hours. This will ensure that the final design will perfectly match your power and efficiency requirements.
Best regards,
Leo Jim
leojim@mqtech1.com
-----------------------------------
#wind
#windenergy
#windpower
#windturbine
#windgenerator
#windmill
#verticalaxiswindturbine
#horizontalaxiswindturbine
#smallwindturbine
#residentialwindturbine
#offgridwind
#ongridwind
#hybridwindsolar
#windfarm
#distributedwind
#windbladetechnology
#permanentmagnetgenerator
#lowwindturbine
#windinverter
#windcontroller
#windtower
#windbattery
#windstorage
#microgridwind
#renewablewind
#cleanenergywind
#hydro
#hydropower
#hydroenergy
#hydrogenerator
#hydroturbine
#microhydro
#pico hydro
#hydroelectric
#hydropowerplant
#hydroelectricgenerator
#hydroelectricturbine
#watergenerator
#waterpower
#waterturbine
#offgridhydro
#runofriver
#hydroinverter
#hydrocontroller
#hydrostorage
#hydromicrogrid
#renewablehydro
#cleanenergyhydro