Maximum working frequency (depending on RPM and no. Multiple factors can have a huge difference in motor performance and efficiency:ġ. So the resulting angle between two hall sensors is Hα=360*2/ 6* 7= 11,14 degree. Hall sensor spacing mechanical angle calculation formula:Ħ is coming from 6 step commutation in the controller.Įxample.
For this i used Finite Element Method Magnetics Tool A Windows finite element solver for 2D and axisymmetric magnetic, electrostatic, heat flow, and current flow problems with graphical pre- and post-processors We can observe that i have areas in pink color with to much magnetic flux, above 2Teslas, so i need to increase the thickness of the tooth to stay under 2 Teslas because the saturation of the lamination. Next step is to run mathematical analysis in magnetic field to see if i have some areas with saturated magnetic field. Mathematical magnetic flux density analysis. The coatings can be: Nickel, Zinc, Phosphate, Epoxy, Gold and others. Neodymium magnets needs a coating otherwise they will rust in contact with air. Temperature classification for neodymium magnets, N stays from Neo from.
If you have a magnet attached to a piece of steel i will demagnetize at higher magnetic flux than in a free space. The actual temperature where magnet start to loose strength is size, shape and magnetic circuit dependent. The temperature rating for Neodymium is only a guide value.
I bought custom made magnets from a Chinese website. This is not very easy task because you need hi temperature magnets and are not so cheap and easy to find for your needed size.
After reading the gear ratio on Opel Agila it resulted that i need a speed of 4000RPM to reach 73.4Km/h in 3-rd gear ( i do not need more than that in a city). This formula is for calculating the torque if you have the power and the speed.
Autocad Inventor 3D cad software was used by me to design 3D model of the motor.īefore start to design something you need to know the RPM needed,torque needed,running voltage, max Amps.
Motor/ controller performance evaluation, test bench setup. 350kW 650V High performance Permanent magnet Synchronous motor 98% efficiency measured.Protected: 3 Phase 400kW motor controller, under developement.