A seminar on brushless dc motors

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A seminar on brushless dc motors

  1. 1. A Seminar on Brushless DC Motors
  2. 3. Basic Structure
  3. 5. Principle of brushless DC motor
  4. 6. Comparison of conventional and brushless dc motors
  5. 7. Drive circuits <ul><li>Unipolar drive </li></ul><ul><li>Bipolar drive </li></ul>
  6. 8. Unipolar drive
  7. 9. Bipolar drive
  8. 10. Applications Laser printer
  9. 11. Hard disk drive
  10. 12. Comparison of an ac synchronous motor and a brushless dc motor for an 8-inch hard disk drive
  11. 13. Efficiency Comparison brush DC to Brushless DC
  12. 14. ADVANTAGES <ul><li>It is more efficient. </li></ul><ul><li>Need less maintenance. </li></ul><ul><li>It can operate higher speeds than conventional dc motor. </li></ul><ul><li>High efficiency & small size are especially important for military, aircraft, & automotive application. </li></ul><ul><li>Speed accuracy is very high. </li></ul><ul><li>Speed control over a very wide speed range. </li></ul>
  13. 15. THANK YOU

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