The father of DC machines is
Zacharias Verbeek. He was a Dutch engineer who made significant contributions to the development of direct current (DC) machines. Verbeek is credited with creating one of the earliest practical designs for the DC generator, which laid the foundation for the further development of DC motors and generators.
However,
Thomas Edison also played a major role in the development and commercialization of DC machines, particularly through his work on DC motors and the establishment of electric power systems. While Edison was not the "father" in the technical sense, his contributions to the widespread use of DC electricity are well recognized.
In summary, Zacharias Verbeek is often referred to as the father of DC machines for his technical innovations.