This raw data is made available from the paper "Loss performance of an additively manufactured axial flux machine stator with an eddy-current limiting structure", authored by Goodall et al, submitted to Materials and Design Journal.

All methodology is contained within the paper. Data is found in different tabs of an excel sheet, with the raw data including titles, with the figure name in the title of the excel tab. A brief overview of the methodology is below:



BH loop and loss measurements:

Toroidal ring samples were used to characterise the material using an AMH-1K Permeameter by Laboratorio Elettrofisico. These samples had a rectangular cross-sectional area of approximately 4x4 mm, however 
this was measured accurately for each sample. The toroid had an outer diameter of 38mm, hence the samples respect the dimensions in BS 60404-6:2018 [15]. Samples were wound with a search coil using 0.35 mm 
diameter, single core copper wire with 45 turns, and a driving coil of 40 turns using 1.5 mm diameter multi-strand copper wire with PVC insulation. BH loops were measured at several frequencies from 5 Hz to 1000 Hz, 
which is the maximum the machine can provide, allowing for the core loss to be measured. For each toroid, a secondary sample of only ¼ of a ring was built, sectioned and imaged to provide a stacking factor, defined 
as the percentage area of magnetic material / the total area including air gaps. This stacking factor was implemented into the measurements in the Neon software (Laboratorio Elettrofisico), used to control the Permeameter 
in order to take account of the air gaps within the material. Heat treatment was completed at 1150 degrees for 1 hour.


Stator calculations and loss measurement:

The stator of the axial flux machine designed and optimized in (17) was selected for prototyping using AM. Two electrical steel laminates of thickness 0.127mm and 0.36mm were considered for comparison with the AM stator. 
The B-H data and the loss coefficient terms in the Steinmetz equation (Equation 1) for the 0.127mm and 0.35mm laminations were obtained from the library material models from the manufacturer in Simcenter MAGNET [16]. 
The material model used for the 0.127mm lamination was that of Arnon 5, while the model of M-19 29Ga was used for the 0.35mm lamination. Two sets of 3D transient electromagnetic simulations were performed to compute the 
stator iron losses by assigning i) the 0.127mm steel material and ii) the 0.35mm steel material for the stator core. Stator winding and testing
The laminated stator was fabricated by machining slots into a tape wound core. A strip of 0.127mm thick laminations was wound into a ring-shaped core with the same dimensions as the stator dimensions of the electric machine. 
The tape wound core was then bonded using an inorganic insulating adhesive to improve structural strength and prevent the layers from splaying. Next, slots were machined into the tape wound core. Finally, a layer of insulating 
material was coated on the machined stator core. 
Rectangular 12AWG equivalent copper wire was used to make the stator coils for the conventional and the additive stators to achieve high copper fill factors. Each coil had 7 turns and the stator had 24 coils. The finished 
stator was glued to an aluminium baseplate using a structural adhesive.
A CNC mill configured as a contact free dynamometer was used to characterize the conventional and additive stators. A 16-pole rotor was mounted in the spindle collet while the stator was mounted on a 6-axis load cell fixed 
to the mill bed. The load cell was used to measure the axial forces and the reaction torque on the stator. Static torque measurement tests described in (17) were performed at different stator currents up to the rated current 
to validate the torque capability of the machine.
To compare the iron losses, no-load test was performed. The stator terminals were open circuited, and the rotor was rotated at different speeds up to 6000RPM (corresponds to an electrical frequency of 800Hz), using the mill 
spindle speed control function. The reaction torque on the stator was measured using the load cell at each speed. The product of the reaction torque T in Nm on the stator and the speed ω in rad/s was computed to obtain the 
stator iron losses P_stator=Tω.