Do not use permanent magnet stepper motor rotor (VR or reactive or variable reluctance type)Very early has been applied on three-phase stepper motor. }93 f years mouth this step the company developed for the permanent magnet rotor, stator poles with tooth stepping motor (In more detail later this article introduces the design principle of magnetic pole tooth)And, with the rotor pitch, can get a higher torque and angular resolution. Three-phase stepper motor stator coil of the main pole number for three times, so the number of three-phase stepper motor stator main for 3, 6, 9, 12, etc. The number of different phase stepper motor stator typical structure and drive circuit, which ignores the rotor structure. Assuming that the rotor are PM or HB, and on the basis of the stator in two phase, three-phase, five equal equipped with corresponding rotor. The stator does not produce unbalanced electromagnetic force (Behind will be described in detail, the rotor radial attractive and not fully offset each other, produce residual radial force)The minimum number of main structure, namely the two phase for the four main pole, three-phase for three main pole, five phase of five main pole, unbalanced structure will produce electromagnetic force, except for special purposes will not use the above structure. Figure 2. 7, the structure of the stator for eight main pole for two phase, three-phase into six main pole, five to 10 main pole, for the most simple structure. On the other hand, such as bipolar (Bi -polar)Coil used by stepper motor drive circuit, the power tube of two phase is eight, five phase is 10, three phase, the adoption of Y or delta winding connection, the relationship between three outlet W move only six power tube is enough. So from motor and drive integrated consideration, the three-phase stepper motor structure is simple, its the lowest manufacturing cost. 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:
