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1. EE 8601 - SOLIDSTATE DRIVES
Unit -V
DESIGN OF CONTROLLERS FOR DRIVES
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2. Contents
 Introduction
 Dynamic model of a DC Motor
 Block Diagram of a DC Motor
 Transfer Functions of a DC Motor
 Closed loop speed control
 Controller design
 Torque loop
 Speed loop
 Position loop
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3. Introduction
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4. Introduction
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5. Introduction
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6. Dynamic model of a DC Motor
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7. Block Diagram of a DC Motor
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8. Derivation of Transfer Functions
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9. Transfer Functions of a DC Motor
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10. Closed loop speed control
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11. Controller Design
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Procedure
 Design the torque loop (fastest) first.
 Design the speed loop assuming the torque loop
to be ideal.
 Design the position loop (slowest) assuming the
speed loop to be ideal.

12. Controller design
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13. Torque loop
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14. Speed loop
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15. Position loop
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16. References
 G.K. Dubey, ‘Power semi-conductor controlled
drives’, prentice hall of india, 1989.
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