Composite excitation two-degree-of-freedom annular winding stepping motor capable of weakening magnetic field coupling

The invention provides a hybrid excitation two-degree-of-freedom annular winding stepping motor capable of weakening magnetic field coupling. Comprising a rotary motion stator (1), a rotor (2) and a linear motion stator (3) which are all of salient pole structures, the rotary motion stator (1) is located on the outer layer, the linear motion stator (3) is located on the inner layer, and the rotary motion stator (1) and the linear motion stator (3) are nested; the rotor (2) is of an annular structure and is located between the rotary motion stator (1) and the linear motion stator (3) to form a double-layer air gap. The permanent magnet motor can drive a load to rotate, linearly or spirally move, effectively weakens coupling between a linear motion magnetic field and a rotary motion magnetic field, and has the advantages of being high in torque density, easy to decouple and control, convenient to machine and assemble and the like. 本发明提供了一种削弱磁场耦合的复合励磁两自由度环形绕组步进电机。包括旋转运动定子(1)、动子(2)和直线运动定子(3)，均为凸极结构，其中，旋转运动定子(1)位于