The paper establishes a simplified theoretical model for variable-reluctance stepping motor systems, based on linearisation of the motor's dynamic torque-producing characteristics about an arbitrary working point. It is shown that, by representing the torque as contours in the sp
...
The paper establishes a simplified theoretical model for variable-reluctance stepping motor systems, based on linearisation of the motor's dynamic torque-producing characteristics about an arbitrary working point. It is shown that, by representing the torque as contours in the speed/switching angle plane, unambiguous stability limits for open and closed-loop operation are clearly defined. A companion Paper [12] shows how the theoretical model provides valuable information about the mid-range instability of a stepping motor system, and provides experimental support for the model.@en
