The following file presents the circuit connection to forma a additive autotransformer. Also, its efficiency and voltage regulation curves are plotted and inserted for 5 different values of load.
Don't forget to rate the file if it's of any help.
Douglas Amaral (2020). Additive Connection of a Autotransformer (https://www.mathworks.com/matlabcentral/fileexchange/65384-additive-connection-of-a-autotransformer), MATLAB Central File Exchange. Retrieved .
Added a picture