The common problems about stepper motor driver

Published：2015-05-29 10:15:10 Click Browse

 
 
 
1. What is a stepper motor driver?
 
Stepper motor is one kind of special motor with control availability. its rotation is a fixed Angle (called "step Angle"), step by step, its characteristic is no accumulated error (accuracy of 100%), so widely used in all kinds of open loop control. 
 
The operation of the stepping motor to one electronic device drivers, the device is stepper motor drives, it is the stepper motor control system from the pulse signal into angular displacement of stepper motor, or stepping motor control system each send a pulse signal, through the stepper motor drive spin step away from the Angle of stepping motor. So the speed of the stepper motor is proportional to the pulse signal frequency. 
 
Therefore, control the frequency of the step motor pulse signal, can be precisely the stepper motor speed control; 
 
Control stepping motor stepper pulse number, stepping motor drive to achieve accurate positioning purposes; the stepper motor 
 
2. What is a subdivision of stepper motor drives?
 
To understand the stepping motor subdivision, first make clear the concept of stepper motor step Angle: it means stepping motor control system each hair a step pulse signal, step motor rotation Angle. 
 
Stepper motor factory is given a value of the stepper motor step Angle, such as HS4240134 model stepping motor is given a value of 0.9 ° / 1.8 ° (half step work step 0.9 °, the whole work was 1.8 °), the stepper motor step Angle can be called 'inherent step away from the Angle of stepper motor, is not necessarily the stepping motor of the actual work really step Angle, where real stepper motor step Angle and stepper motor drives, see the following data ( with an example of nema34) : 
 
Inherent interval Angle of stepping motor The drive type and working condition 
 
The real step away from the Angle of stepper motor run time 0.9 ° / 1.8 ° 
 
Stepper motor drive to work in the state of half step 0.9 ° 0.9 ° / 1.8 ° 
 
Subdivision stepper motor drive to work in a state of 0.36 ° 5 segments 0.9 ° / 1.8 ° 
 
Subdivision stepper motor drive to work in a state of 0.18 ° 10 subdivision 0.9 ° / 1.8 ° 
 
Subdivision stepper motor drive to work in a state of 0.09 ° 20 subdivision 0.9 ° / 1.8 ° 
 
Subdivision stepper motor drive to work in a state of 0.045 ° 40 segments 
 
Can be seen from the above data: stepper motor through subdivision drive of stepper motor drives, the stepper motor step Angle is small, such as stepping motor drives work breakdown in 10 state, where the step Angle for 'inherent step away from the Angle of stepping motor of one over ten, that is to say:' when the stepper motor drive work step without subdivision of the state, the stepping motor control system, each hair a step pulse stepper motor 1.8 ° rotation; With subdivision driver work breakdown in 10 state, motor rotation only 0.18 °, 'this is the basic concept of subdivision. Segmentation function accurately controlled by step motor drive * is produced by the phase current of the stepper motor, has nothing to do with stepper motor. 
 
What are the advantages of 3. The driver segment, why must have suggested that I use segmentation function. 
 
Stepper motor subdivided drive main advantages are: completely eliminates the stepping motor of low frequency oscillation. 
 
Stepper motor at low frequency oscillation is a stepper motor (especially reactive motor) the inherent characteristics of the segment is the only way to eliminate it, if your stepper motor sometimes have to work in the resonance region (arc), select subdivision stepper motor drives is the only option. 
 
In order to improve the output torque of the stepper motor. Especially for three-phase reactive motor, the torque about 30-40% higher than that of not subdivided. 
 
In order to improve the resolution of the stepper motor. Due to reduced the stepper motor step Angle and improve the homogeneous degree of the stepper motor step, 'improving the resolution of the stepper motor is self-evident. 
 
The advantages of these advantages, especially in performance, and is not the change of a quantity, but a qualitative leap. According to our records, the original use subdivision stepper motor drives the user through the comparison, mostly re-election for subdivision stepper motor drives. 
 
So we suggest you had better choose subdivision stepper motor drives. 
 
4. What is a hybrid stepping motor, what is a reactive stepping motor, what's the difference between the two. 
 
On the structure and material is different, the reactive stepper motor doesn't like hybrid stepping motor internal permanent magnetic material, so the reactive stepper motor since no resistance, and hybrid stepping motor has the resistance (that is, under the condition of the motor without electricity has certain self-locking force). 
 
There are differences on performance, operation of the hybrid stepping motor are relatively stable, relatively large output torque, small run voice. 
 
Two kinds of stepper motor is there a difference in price, reactive stepper motor is relatively cheap than the hybrid stepping motor. 
 
5. What is the number of phase step motor, I should choose a few phase stepper motor. 
 
Stepping motor phase number is refers to the number of sets of step motor coil inside, at present there are two commonly used phase stepping motor, three-phase stepper motor, four phase stepper motor, five phase stepper motor. Stepping motor phase number is different, the interval Angle is different, generally two phase stepper motor step Angle is 0.9 ° / 1.8 °, three-phase stepper motor is 0.75 ° / 1.5 ° etc, five phase stepper motor is 0.36 ° / 0.72 °. 
 
When no subdivision stepper motor drives, the user main * choose the number of different phase stepping motor to meet the requirements of his step Angle. If using subdivision stepper motor drives, 'phase number will become meaningless, users only need to change the fine fraction on stepper motor drives, can change interval Angle. 
 
6. I was just about to choose 5 phase hybrid stepping motors, excuse me, do you have any Suggestions? 
 
5 phase hybrid stepping motor is in a state is eliminated, so we suggest: if you must use the five phase stepper motor step Angle (0.36 °), please choose two phase hybrid stepping motor and matching subdivision stepper motor drives, 5 subdivision in the state of the stepper motor step Angle is 0.36 °, same and subdivision of the stepper motor step Angle after than inherent five phase stepper motor step Angle more even and higher positioning precision, run more smoothly and contribute more.