![]() ![]() Standard hybrid motors have 200 rotor teeth and rotate at 1.8º step angles. They are constructed with multi-toothed stator poles and a permanent magnet rotor. ![]() This discussion will concentrate on the hybrid motor, since these step motors combine the best characteristics of the variable reluctance and permanent magnet motors. There are three basic types of step motors: variable reluctance, permanent magnet, and hybrid. A wide range of rotational speeds can be realized as the speed is proportional to the frequency of the input pulses.It is possible to achieve very low speed synchronous rotation with a load that is directly coupled to the shaft.The stepper motors response to digital input pulses provides open-loop control, making the motor simpler and less costly to control.Therefore the life of the step motor is simply dependent on the life of the bearing. Very reliable since there are no contact brushes in the motor.Excellent response to starting/stopping/reversing.Precise positioning and repeatability of movement since good stepper motors have an accuracy of 3 to 5% of a step and this error is non-cumulative from one step to the next.The motor has full torque at standstill (if the windings are energized).The rotation angle of the motor is proportional to the input pulse.Converting a non-linear input signal to a linear output signal. ![]()
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