When the stepper motor switch once the excitation current of the stator winding, rotor is rotating Angle of a fixed interval Angle. Step away from the Angle of general mountain switching phase current of rotary torque, so I need the number of each phase is even. Usually for more than two phase stepper motor, of course, there are some special only a single-phase stepper motor coil. Though single phase, as well as a coil direction of toroidal flux produced by the interaction to drive the rotor rotation. Practical number of phase step motor with single, two phase, three-phase, four, five. Now use most of the stepper motor with permanent magnet rotor. The cause of the widespread use of permanent magnets is of high efficiency, high resolution, etc. The following mainly introduce the permanent magnet rotor. Stepper motor resolution (Steps in a circle, where 3600 divided by step Angle)The higher, the higher the position precision. In order to get high resolution, the number of design. PM rotor is N and S pole on core surface interaction and pitch of the rotor is placed, the number of rotor as the sum of N pole and S pole to simplify the explanation, assuming a logarithmic to 1. Here to determine the rotor of permanent magnet stepper motor step Angle by type (2. 1)Said, where N for rotor polar logarithmic, P for stator phase number, (Later in this chapter narration of HB stepping motor N, for the rotor teeth): 0. = 1800 / PN (2. 1)Type (2. 1)Physical meaning is as follows: the rotor rotating mechanical point of view of a week to 3600, such as the number of 2 N, purify, equivalent to a highly mechanical point of view of the 1800 / N,. That is to say, a pole mechanical Angle is separated with the stator phase number to get interval Angle, this concept is shown in figure 2. 1. By type (2. 1), the step distance, the smaller the Angle, the higher the resolution, thus to improve the resolution of the stepper motor, will increase the rotor polar logarithmic Nr or resin by stator phase Numbers more heterogeneous type method. And the increase of Nr is limited by a mechanical processing, so to make a high resolution step motor need using two methods. the main products: stepper motor, brushless motor, servo motor, stepping motor drive, brake motor, linear motor and other kinds of models of the stepper motor, welcome to inquire. Telephone:
