1 / 20

Chapter 13 DC-Motor Drives

Chapter 13 DC-Motor Drives. These drives continue to be used. DC-Motor Structure. With permanent magnets or a wound field. DC-Motor Equivalent Circuit. The mechanical system can also be represented as an electrical circuit. Four-Quadrant Operation of DC-Motor Drives.

bern
Télécharger la présentation

Chapter 13 DC-Motor Drives

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 13 DC-Motor Drives • These drives continue to be used Chapter 13 DC Motor Drives

  2. DC-Motor Structure • With permanent magnets or a wound field Chapter 13 DC Motor Drives

  3. DC-Motor Equivalent Circuit • The mechanical system can also be represented as an electrical circuit Chapter 13 DC Motor Drives

  4. Four-Quadrant Operation of DC-Motor Drives • High performance drives may operate in all four quadrants Chapter 13 DC Motor Drives

  5. DC-Motor Drive Torque-Speed Characteristics and Capabilities • With permanent magnets Chapter 13 DC Motor Drives

  6. DC-Motor Drive Capabilities • Separately-Excited field Chapter 13 DC Motor Drives

  7. Controlling Torque, Speed and Position • Cascaded control is commonly used Chapter 13 DC Motor Drives

  8. Small-Signal Representation of DC Machines • Around a steady state operating point Chapter 13 DC Motor Drives

  9. Electrical Time-Constant of the DC Machine • The speed is assumed constant Chapter 13 DC Motor Drives

  10. Mechanical Time-Constant of the DC Machine • The load-torque is assumed constant Chapter 13 DC Motor Drives

  11. DC-Motor Drive: Four-Quadrant Capability • If a diode-rectifier is used, the energy recovered during regenerative braking is dissipated in a resistor Chapter 13 DC Motor Drives

  12. Ripple in the Armature Current • Bi-polar and uni-polar voltage switchings Chapter 13 DC Motor Drives

  13. Control of Servo Drives • A concise coverage is presented in “Electric Drives: An Integrative Approach” by N. Mohan (www.MNPERE.com) Chapter 13 DC Motor Drives

  14. Effect of Blanking Time • Non-linearity is introduced Chapter 13 DC Motor Drives

  15. Converters for Limited Operational Capabilities • Two switches for 2-quadrant operation and only one switch for 1-quadrant operation Chapter 13 DC Motor Drives

  16. Line-Controlled Converters for DC Drives • Large low-frequency ripple in the dc output of converters Chapter 13 DC Motor Drives

  17. Four Quadrant Operation using Line Converters • Two options to achieve 4-quadrant operation Chapter 13 DC Motor Drives

  18. Effect of Discontinuous Current Conduction • Speed goes up unless it is controlled Chapter 13 DC Motor Drives

  19. Open-Loop Speed Control • Adequate for general-purpose applications Chapter 13 DC Motor Drives

  20. DC Drive Characteristics and Capabilities • Line current in switch-mode and line-converter drives Chapter 13 DC Motor Drives

More Related