Abstract：For an axial modulating permanent magnetic reducer,7 factors influencing its static torque characteristics were investigated with finite element simulation and an orthogonal test method.The 7 factors include the thickness of driving,driven and modulation magnetic poles(h1,h3,h2),thickness of driving and driven rotor disc(h0,h4),and the gaps between driving or driven pole and modulation pole(gap1 and gap2).In simulation,the number and cross sectional area of poles,and the outer-diameter of rotor discs keep a certain value.Range analysis indicated that gap2 influences the static torque more than the other factors else,and the smaller the gap2,the greater the static torque.The followed are h1 and h2,and the larger(or smaller) the h1(or h2),the greater the static torque.The gap1 and h3have larger influence too to static torque,and the larger(or smaller) the gap1(or h3),the greater the static torque.The influence of h0 and h4is the smallest in all of factors.

Keyword：axial modulation;permanent magnetic reducer;torque characteristics;orthogonal experiment method;