Stepper motor step and step, the problems and solutions

 Synchronous torque generated in step motor cannot make the rotor speed single phase motor price with the rotation speed of the stator magnetic field, causing loss of steps. Step out the main reason and solution: (1) the stepper motor torque, drag the ability is not enough, when the drive pulse frequency reaches a critical value began to step out. Due to dynamic output torque of stepping motor with the continuous rise in frequency and reduce, so any working frequency is higher than the frequency will produce out of step. There are three solutions: can make the electromagnetic torque of stepping motor to produce increased, therefore can within the scope of rated current and appropriate increase the drive current. Torque is insufficient in the high frequency range, appropriate to improve the driving voltage of the drive circuit, To switch to large torque of stepping motor, etc., also can make the stepping motor to overcome torque decreases, and therefore can be appropriately reduce the frequency of motor operation, in order to improve the output torque of the motor. 

(2) step motor starting out of step. Because the stepping motor itself and the inertia load, when the accelerating time is too short will appear this phenomenon. Should set up reasonable acceleration time, make motor steady rise from low speed to a certain speed. (3) stepping motor to produce resonance is also a cause of out of step. The continuous operation of the stepping motor, if the control pulse frequency ac motor is equal to the natural frequency of the stepper motor, will produce resonance. In a control pulse cycle, vibration attenuation, has not yet been fully under a pulse has come, and so near the resonance frequency of dynamic error small diesel generator and leads to stepper motor out of step. The solution: reduce the stepper motor drive current. By adopting the method of subdivided driving and damping method. Rotor get too much energy in the process of step by step, the average speed of the rotor would be higher than the average rotational speed of the stator magnetic field, caused the stepper motor output torque increases, thus make the stepping motor produces more step. The step is when the stepper motor, the stepper motor can be reduced with the drive current, in order to reduce the output torque www.dongfeng-motor.com of stepping motor or make deceleration time longer.