1. CLOSED-LOOP MOTOR SPEED SENSOR & CONTROLLER
Spring 2003, Team #3
CLOSED-LOOP MOTOR SPEED SENSOR & CONTROLLER
STAFF
Greg Carlsson, BSEE
Rich Dehnel, BSEE
Michael Host, BSEE
Dave Jasinski, BSEE
Kentucky Pommerening, BSEE
Jarrod Widmann, BSEE AND BSCS

2. Kentucky D. Pommerening Jarrod D. Widmann
Spring 2003, Team #3
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CLOSED-LOOP MOTOR SPEED SENSOR & CONTROLLER
Team Page
Gregory P. Carlsson
Richard G. Dehnel
Michael R. Host
David L. Jasinski
Kentucky D. Pommerening
Jarrod D. Widmann

3. CLOSED-LOOP MOTOR SPEED SENSOR & CONTROLLER
Spring 2003, Team #3
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CLOSED-LOOP MOTOR SPEED SENSOR & CONTROLLER
Project Abstract
Precision AC motor control is currently an expensive option requiring a $200+ encoder and supporting circuitry. This project aims to design a cost effective alternative with a flexible interface which can be implemented in nearly any industrial AC motor application to provide closed-loop control.
Cost, reliability, accuracy, and safety are key aspects in the scope of this project.

4. CLOSED-LOOP MOTOR SPEED SENSOR & CONTROLLER
Spring 2003, Team #3
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CLOSED-LOOP MOTOR SPEED SENSOR & CONTROLLER
Product Description
The input to the Closed Loop Motor Speed Sensor and Controller will be generated by an optical sensing device which detects the shaft speed of a motor. This signal will be sent to a micro-controller which compares the input signal to a pre-programmed reference value. The signal will then be manipulated in the digital domain to provide an analog feedback signal to the motor controller. A user interface will be developed to enter the reference value to the micro and display the actual motor shaft speed.
A power supply will need to be developed to supply the various circuits.

5. CLOSED-LOOP MOTOR SPEED SENSOR & CONTROLLER
Spring 2003, Team #3
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CLOSED-LOOP MOTOR SPEED SENSOR & CONTROLLER
Product Feature Set
The desired features for our product included:
Accurate control of desired speed level
Analog output switch-able between 0-10VDC and 4-20mA. This signal will be used as a control signal to an AC motor drive, or as a monitor signal to a chart recorder or data logger.
Instantaneous under/over speed indicator
Audible under/over speed alarm for sustained out-of-range conditions. Form C relay triggered for same alarm.
Programmable scaling factor for display output
Constantly displayed set-point and actual speed values.
Internal over-temperature alarm

6. Product Performance Requirements
Spring 2003, Team #3
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CLOSED-LOOP MOTOR SPEED SENSOR & CONTROLLER
Product Performance Requirements
0.4% accuracy – actual versus displayed speed of motor shaft
Less than 2.5W power consumption
User interface keypad will be chosen for industrial environment
The user display will be viewable from 5 feet
Under-speed and over-speed indicators on user interface
Audio alarm for sustained under-speed and over-speed conditions
Form-C relay output for alarm conditions
Over-current and over-voltage protection on input power
Shaft speeds to 1800 RPM
Compatibility with AC motor drives and PLCs containing analog inputs.
Mounting by DIN rail or panel screws.
Installation with basic hand tools.

7. Product Standard Requirements
Spring 2003, Team #3
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CLOSED-LOOP MOTOR SPEED SENSOR & CONTROLLER
Product Standard Requirements

8. Implementation Block Diagram
Spring 2003, Team #3
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CLOSED-LOOP MOTOR SPEED SENSOR & CONTROLLER
Implementation Block Diagram

9. Allocation of Standard Requirements
Spring 2003, Team #3
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CLOSED-LOOP MOTOR SPEED SENSOR & CONTROLLER
Allocation of Standard Requirements

10. Association of Performance Requirements
Spring 2003, Team #3
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CLOSED-LOOP MOTOR SPEED SENSOR & CONTROLLER
Association of Performance Requirements
Thank You!