Stepper Motors

Stepper motors are a special case of Brushless DC Motors. Construction is identical except that they contain no position sensors. Excitation is sequentially applied to the windings, creating the rotating field to produce torque.

  • Low torque applications
  • Open loop micropositioning
  • Timer switching

  • Simplicity
  • Compatability with digital control schemes

  • High continuous power dissipation
  • High ripple torque

Used for noncritical, low power applications, since positional information is easily lost if acceleration or velocity limits are exceeded.

See also: Brush DC Motors, Brushless DC Motors, Electric Motors.

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Subjects: Electronics