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Comprehensive Guide to Electric Rotary Actuators and Step Motors<br>

Learn about electric solenoids, force, DC motors, stepper motors, and selecting step motors for torque, speed, and size considerations. Understand step motor drives, resolutions, and common choices for optimal performance.<br>

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Comprehensive Guide to Electric Rotary Actuators and Step Motors<br>

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  1. Electric Solenoids Force stroke-1

  2. Electric Rotary Actuator (solenoid)

  3. Electric Rotary Actuators (motors) • DC motors • AC motors • stepper (2-phase synchronous) • brushless (3-phase synchronous) • induction

  4. Step Motors http://www.pcbheaven.com/wikipages/How_Stepper_Motors_Work/

  5. Step Motors

  6. Step Motor12 step/rev, 1 phase on

  7. Step Motor12 step/rev, 2 phase on

  8. Step Motor12 step/rev, half-stepping

  9. Step Motors

  10. Selecting Step Motors • Torque • Speed • Size, shaft configuration

  11. Torque/Speed $20 motor

  12. Torque/Speed $160 motor

  13. Step Motor Drives • Resolution (full, half, microstepping) • Current Limit (resistor or digital) • AC powered or DC powered • Pulse/Direction or Indexing

  14. Resolution • Full step/Half step • Microstepping • x2,x4,x5,x8,x10,x16,x25,x32,x50,x64,x125,x128,x250, x256 common choices • Max step frequency • PLC: 7kHz pulse rate => 2100 RPM at x1, 8.2RPM at x256 (1.8deg motor) • Compumotor 6104: 2MHz pulse rate => 2300RPM at x256 • Resonance problems

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