Now in two facies three-phase stepper motor as an example in detail the number of phase step motor and features. Phase number and features comprehensive overview is: 1, high resolution according to the type (2. 1)Step, from the Angle of 1800 / PN. And therefore the greater the number of P, the higher the angular resolution. Improve resolution, can improve the positioning control precision, improve the low-speed out-of-step, made it possible to multiphase control, and can improve the damping (Improve braking performance, reduce the maximum overshoot and stops the braking time)。 Details in part drive technology. 2, low vibration in figure 2. 9 represents two phase and three-phase stepper motor torque fluctuation, phase number, the more in phase two phase winding dynamic torque curve intersection of the torque value and the maximum static torque Te ding, the less relative error. A few for the motor load torque of the lower limit value, (Th a Tg)/ Th for the relative error of torque ripple, phase number, the more the smaller this value, the better to reduce vibration. Namely, phase number, the more of motor torque fluctuation amplitude is smaller, the higher the frequency, the smaller the vibration (Related instructions in a later chapter)。 3, high speed multiphase can step motor has the advantage of high speed response. Stepper motor for synchronous motor, winding current frequency and rotor speed proportional, if the motor at high speed, winding current angular frequency. Increase, make the winding inductance L of reactance. L increase, thereby reducing current, torque decline. When the stepper motor is driven by thousands of PPS. Motor winding impedance Z compared with dc resistance, reactance wL will increase dramatically. When high speed motor, such as voltage V a, motor phase current as V/wL. The mechanical angular velocity. Wm is a w = Nrwm, for the same mechanical angular velocity of the wm motor, the current is inversely proportional to the Nr. According to the type (2. 1)Step, when two phase Nr = 50, from the Angle of 1. 8 degrees; Step five phase Nr = 20, from the Angle of 1. 8 degrees when the two stepper motors with the same speed high speed rotates, the five phase winding current is two phase 2. Small five times, because the current torque is small, so the five phase torque is bigger than two phase. 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:
