Choosing the proper engine that fits the desired application is a crucial design factor in robotics. Accordingly, this paper compares different types of engines for other Industrial robots (IR) and proposes to put practical criteria based on the mechanical design and its application. It starts from describing the IR choice to explaining the synchronous motor with permanent magnets as a base of the motor choice. Particular attention is paid to the consideration of components and their purpose supported by the creation of the subsequent drawings. SolidWorks system was implemented to obtain expressive and high-quality graphics and three dimensions design. Moreover, the entire Electrical Magnetic Force (EMF) was simulated using the method of variational parameterization. Accordingly, a developed synchronous motor with a built-in permanent magnet is proposed, which is supported by 3D design graphics to evaluate the deformation and margin of the housing and motor shaft safety.The obtained results provide a valuable study for the robotic engines' characteristics, such as the engine's strength, torque, power, and speed. An example of the comparison results is testing the synchronous motor, which confirms that the permanent magnets built-on synchronous motor is most recommended for the lightweight robots designed to work under average load weight. More results were performed to compare the proposed design with the robotics world's leading companies, showing that the developed proposed design has significant characteristics that outperform traditional motors.
