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Multiple Reference Frame Analysis of a Multistack Variable- Reluctance Step per Motor

Multiple Reference Frame Analysis of a Multistack Variable- Reluctance Step per Motor. By Prabu.T Edited By Sarath S Nair www.technologyfuturae.com. Content. Introduction Stepper motor operating principle Multistack V-R stepper motor Multiple reference frame analysis Applications

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Multiple Reference Frame Analysis of a Multistack Variable- Reluctance Step per Motor

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  1. Multiple Reference Frame Analysis of a Multistack Variable- Reluctance Step per Motor www.technologyfuturae.com By Prabu.T Edited By Sarath S Nair www.technologyfuturae.com

  2. Content • Introduction • Stepper motor operating principle • Multistack V-R stepper motor • Multiple reference frame analysis • Applications • Conclusion • Reference www.technologyfuturae.com

  3. Introduction: • The stepper motor is used widely in motion control systems where it is often operated in a continuous or constant speed mode rather than in a stepping mode. • A multistack variable-reluctance stepper motor is analyzed using the concept of multiple reference frames • An average-value model is developed using the concept of multiple reference frames www.technologyfuturae.com

  4. Stepper motor operating principle • When the winding on a certain phase is excited (energized) the rotor will rotate, seeking alignment with the excited phase winding, such that maximizing the inductance of that phase. • This position is the stable equilibrium position of rotor where the net torque is zero. www.technologyfuturae.com

  5. www.technologyfuturae.com

  6. Multistack V-R stepper motor • Multi-stack variable-reluctance motors are widely used to give smaller step sizes. The motor is divided along its axial length into magnetically isolated sections “stacks”, and each of these sections can be excited by a separate winding.. www.technologyfuturae.com

  7. Operation of multi stack motor • The stator of each stack consists of “N”poles and each pole has a number of teeth ”x” and carries a phase winding. • The teeth on the different stator stacks are misaligned. • The rotor stacks have number of teeth equals to stator teeth number but they are aligned www.technologyfuturae.com

  8. Multiple reference frame analysis: www.technologyfuturae.com

  9. Cont… www.technologyfuturae.com

  10. Cont… www.technologyfuturae.com

  11. Cont… www.technologyfuturae.com

  12. MACHINE EQUATION -2ƟR www.technologyfuturae.com

  13. Cont.. www.technologyfuturae.com

  14. Cont.. www.technologyfuturae.com

  15. MACHINE EQUATION 4ƟR www.technologyfuturae.com

  16. Cont.. www.technologyfuturae.com

  17. Cont.. www.technologyfuturae.com

  18. Cont.. www.technologyfuturae.com

  19. Average value model: www.technologyfuturae.com

  20. Applications: • Robotics • CNC Machines • Computer peripherals • Business applications • Process Control www.technologyfuturae.com

  21. Conclusion: • Operation of various stepper motor is discussed. • A multistack variable-reluctance stepper motor is analyzed using the concept of multiple reference frames • The method of multiple reference frames has been Extended to provide an average-value model • This model can be used as an unique tool to aid in the design of the machine as well as in the design of the controls associated with the electronic drive system. www.technologyfuturae.com

  22. Reference: [1] P. J. Clarkson and P. P. Acarnley, "Simplified Approach to the Dynamic Modeling of Variable- Reluctance Stepping Motors," IEE Proc., Vol. 136,PartB, No. 1, January 1989, pp. 1-10. [2] S. D. Sudhoff, “Member Multiple Reference Frame Analysis of a Multistack Variable- Reluctance Stepper Motor” IEEE Transactions on Energy Conversion, Vol. 8, No. 3, September 1993 [3] S. D. Sudhoff and P. C. Krause, "Analysis of Steady-State Operation of a Multistack Variable-Reluctance Stepper Motor Using qdO Variables," accepted for IEEE Transactions on Energy Conversion. www.technologyfuturae.com

  23. Technical Presentations, Research Reviews, New designs & Developments Log On to www.technologyfuturae.com TechnologyFuturae

  24. Thank you www.technologyfuturae.com

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