When the stepper motor stator a phase winding through the direct current, the most close to the phase of the rotor teeth is attracted to the stator phase, because of the electromagnetic torque is greater than the load torque, rotor movement. When the rotor rotation to the electromagnetic torque and load torque equilibrium position, the rotor is motionless, the electromagnetic torque is transferred to the load need to locate the position of the. And then on to the next phase excitation current, the other is the most close to the phase of the rotor teeth is drawn, the load is the electromagnetic torque driver, moving from one step Angle, arrived at the next rest position. Switching frequency and frequency of excitation phase determines the final Angle and speed of the rotor rotation. Stepper motor layout is determined by the phase number and the number of teeth on the rotor of stator. Switch phase where the number of times and the step Angle for the step Angle, the product of this value is decided to the final rest position. Relative to the load torque, such as produced by the stepper motor torque is enough big, switch the instruction can drive load, position control. At this point the location of the balancing its produced by static torque stepper motor.
