Parameter analysis of a novel planar motor with dual-layer magnetic array

In the manufacturing processes, the requirements for mechanical equipment are getting higher and higher. The precision mechanical equipment usually require the following characteristics, multiple degree of freedom, high precision, high frequency response, fine output characteristics, high force density, and so on. The traditional ball-screw structures has gradually begun to not meet the needs of precision machining. Now the direct-driving moving platform, also called planar motor, attracts wide attention. But the technology for designing and manufacturing the planar motor is not mature enough, and the output characteristics, for example, output force and stroke, are not satisfactory enough. In the paper, a new conceptual design of planar motor by means of using double-layer two-dimensional magnetic arrays is proposed. It can extend its stroke by connecting multiple planar motors together, increase the output force density, and suppress the fluctuation of the output force.