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  • Stepper Motor Control Using the PIC16F684
    between full steps and to improve the step resolution of the motor. Microstepping also This application note describes how to drive a bipolar improves the efficiency of the system, because the stepping motor with the PIC16F684. The Enhanced current in the windings of the motor is manipulated
  • Stepper Motor Control with dsPIC (R) DSCs
    This application note describes how to drive a stepper. motor with a dsPIC33F motor control family DSC. The eight PWM channels (six pins from the PWM1. module and two pins from the PWM2 module) are used. to control a stepper motor in all possible ways, whether. it is bipolar or unipolar, using full
  • Improving High-Speed Performance of Hybrid Stepper Motors
    Bipolar drives supply steppermotor windings with current waveforms that look like square waves when fully stepping or sine waves when micro-stepping at a high resolution. The waveforms shown in the oscilloscope displays illustrate the drive current in a half-stepping mode, which is two discrete
  • Microstepping Tutorial
    A bipolar stepper motor has two windings. The current through each winding is varied in order to rotate the stepper motor. This article describes microstepping theory, three modes of operation (full stepping, half stepping, and wave stepping) and sources of error, and sources of failure
  • Determining MOSFET Driver Needs for Motor Drive Applications
    driver is normally in the form of a power transistor. This can be a bipolar transistor, MOSFET or an Insulated Gate Bipolar Transistor (IGBT). In some small Brushless DC motor or stepper motor applications, the MOSFET driver can be used to directly drive the motor. For this application note, though
  • Medical Device Link . Spotlight on Motors
    A high-torque permanent-magnet stepper motor measures 55 mm diam and 27 mm long. The Series 55M motor, which is available in unipolar and bipolar versions, produces 176.5 mN.m pullout torque when driven with a 24-V-dc chopper drive. Offered in the most commonly used frame-size configurations
  • Stepping Motors Fundamentals
    . From the electrical and control system perspective, variable reluctance motors are distant from the other types. Both permanent magnet and hybrid motors may be wound using either unipolar windings, bipolar windings or bifilar windings. Each of these is described in the sections below.
  • Medical Device Link .
    lubricated high-precision ball bearings and a range of windings to match a variety of unipolar and bipolar drives. 1 Progress Dr., Dover, NH 03820-5449. According to the manufacturer, a combination of a slotted stator with a rotor design results in a line of ac brushless motors that are virtually

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