In the case of two phases, there are two windings in two phases. At most, can not two magnetic fields in opposite directions be produced only? Isn't that step forward, 180 degrees?Baidu once, and what seems to be related to the number of teeth: step angle =360/, number of beats * teeth numberWhat is the number of teeth? Why divided by the number of teeth?And what is the working principle of stepping motors?On the net all just writes "the stepping motor is to change the electric pulse signal into the angle displacement or the line displacement open loop control element."."What I want to know is the detailed work principle. Can someone explain that?
If a circle is divided into 50 parts, that is, each 7.2, also 7.2 degrees; the stepper motor rotor outer ring and stator inner ring as a circle, are divided into 50 parts. When the rotor turns 7.2 degrees, the first part of the rotor is fully aligned with the second of the stator, which is a step angle with a value of 7.2 degrees. One shot turns 7.2 degrees, not fine enough. A big shot and then divided into 4 small shots, into each small shot 1.8 degrees. In this way, you need 200 shots, that is, 200 turns. A+, A_, B+, B_ (1000010000100001)
Step angle: corresponds to a pulse signal, the motor rotor rotation angle displacement is expressed by theta. Theta =360 degrees (rotor tooth number, J* running number), take conventional two and four phases, rotor tooth as 50 teeth motor, for example. Four running step angle theta =360 / (50*4) =1.8 (commonly known as the whole step), eight shot operation stepangle 9 =360 / (50*8) =0.9 (commonly known as the half step).
Structure: stepper motor rotor evenly with a lot of small teeth, the teeth of the stator with three excitation winding, the geometric axis of the rotor tooth axis in orderwere staggered. 0, the 1/3, the 2/3, (two adjacent rotor tooth axis was the distance between the pitch to the said, A and 1) teeth aligned, B and 2 1/3 at right staggered tooth, C and 3 2/3 at right staggered tooth, 5 teeth and A'aligned (A' is A, the tooth the 5 is 1 teeth)
