stepper motor driver features
(1) Specialized integrated circuits constituting the stepper motor drive system:
A, Pulse distributor integrated circuits: such as Sanyo's PMM8713, PMM8723, PMM8714 and so on.
B, controller integrated circuit containing pulse distributor and current chopper: such as SGS L297, L6506 and so on.
C, drive integrated circuits containing only power drive(or including current control, protection circuit): such as MTD1110(four-phase chopper drive) and MTD2001(two-phase, H-bridge, chopper drive) of Japan New Electric Power Industry Corporation.
D, drive controller integrated circuits that include pulse distributors, power drivers, current control, and protection circuits, such as Toshiba's TB6560AHQ, MOTOROLA's SAA1042(quaternary), and ALLEGROO's UCN5804(quaternary) Wait.
(2) Overview of "Segment Driver":
The driving method of dividing the "inherent step angle of the motor" into several small steps is called a subdivision drive. The subdivision is achieved by precisely controlling the phase current of the stepping motor by the drive, and has nothing to do with the motor itself. The principle is that the stator power phase current does not rise at a time, and the power off phase current does not drop to 0 at a time(the winding current waveform is no longer an approximate square wave, but an N-class approximate ladder wave), then the stator winding current The magnetic field generated by the force, The rotor will have N new equilibrium positions(forming N step angles).
