The characteristics and advantages and disadvantages of stepper motor rotating under different beat control are summarized
The stepper motor has two kinds of operation mode, and four phase four; two, four phase eight beat.Four phase four stepper motor step angle than the four phase eight shot twice, but the control precision than the four phase eight shot, the same pulse frequency under four phase four twice as fast.
In order to understand the speed of the four phase, eight beat operation and the next step motor, it is necessary to know two basic concepts first.1, the number of beats: a magnetic field changes periodically required pulse number or a conductive state represented by N, or a motor turned a tooth angle required pulse number to four phase motor as an example, there are four phase four operation mode is AB-BC-CD-DA-AB, four phase eight step operation mode A-AB-B-BC-C-CD-D-DA-A.2, step angle: corresponding to a pulse signal, 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).
These two concepts are clear, we can calculate the speed, the basic step angle of 1.8 DEG stepper motor as an example (now on the market of the two conventional and four phase hybrid stepping motor is the basic step angle 1.8 degrees), four phase eight step operation mode, each receives a pulse signal. 0.9 degrees per second, if receiving 400 pulses, then the speed of 400X0.9 per second =360 degrees, and every second round, 60 revolutions per minute.Other things can be calculated by the same way
