Design and characteristic analysis of high speed slotless permanent magnet sychoronous motor for surgical hand-piece

This paper presents a design and analysis of 40,000rpm class high speed slotless brushless DC motor for surgical hand-piece. To design the motor, performance characteristic according to stator slot type is compared. Simple analytical equation is applied to consider about slotless motor characteristics as like torque constant and speed constant. Design of prototype motor is proposed by simple analytical equation and simulation which is based on magnetic circuit analysis. Design result is verified by finite element analysis about 2D and 3D and experimental result.