This article focuses on the scalar control of four induction machine structures: the conventional induction machine, the double-star machine, the open-ended stator winding machine and the dual open-end stator winding machine. To compare these different structures under the same conditions, we used a single induction machine prototype to design these four machine structures. In addition, we also developed a single scalar control algorithm to control these four machines, which is implemented in a field-programmable gate array board FPGA. The experimental results showed the efficiency of the operation of this prototype as well as that of the algorithm developed for the four machines. The experimental results also presented the significant advantage of open-end stator winding structures over star winding structures. The increase in three-phase windings allows for better power segmentation, which is better when the three-phase stator windings are open-ended.