The rotor for ring, excitation winding of the stator inside, outside the circle structure motor called external rotor motor (外转子电机或反向电机)。 External rotor motor can be used according to its characteristics to different occasions, such as applied to the low speed high torque, direct drive, constant speed, rotating speed and small change. When motor size and at the same time, the inner rotor rotor outer rotor is better than big diameter, torque is proportional to the DZL (generallyD for the rotor diameter, L for axial length), and the outer rotor at low speeds can produce large torque. Outer rotor moment of inertia is big, is advantageous to the steady speed running. Conversely, when I need to stop frequent starting or frequent speed running, including transient operation, this kind of motor are not suitable for use. Described earlier in the PM, VR, HB stepping motor rotor and the stator anti outfit can constitute the external rotor motor, such as HB type permanent magnet is installed on the outer rotor, but the outside of the motor will produce a lot of magnetic flux leakage, the stator winding assembly in inside, suitable for closed loop control. This machine is rarely used open loop control. Figure 2. 45 for 3-phase VR type 12 main pole, 100, 1. 2 degrees of rotor and stator iron core. The stator side permanent magnet structure as shown in figure 2. 46, the two are not painting field winding. Two between a permanent magnet stator core, of the stator. Is round the pitch of two cylindrical magnetizer, before and after the tooth stagger 1/2 after the pitch of the rotor, did not draw here. 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:
