Drive Identification and Location

1. How would changing the speed of the driving motor cause a change in the process or its rate?

2. Will product quality be improved or impaired?

3. What effects will the improvement or impairment have?

4. In what way can the machinery operate at other than its current speed?

5. In what way can any speed-changing mechanism (such as step pulleys, gears, or fluid drives) be installed to provide suitable electrical signal(s)?

6. If the existing process is mechanically modulated (dampers, valves, gates), how would new sensor(s) be installed to provide suitable electrical signal(s)?

7. If the existing process is electrically modulated (dc motors or wound-rotor induction motors), how would squirrel cage induction motors be adapted to the equipment?

8. Describe how a process modulating control has been or would be, applied to a drive system of this type.

9. Describe the physical space for installing a new or additional electrical motor controller, (Conventional induction motor ASD electronics need at least twice the space of existing starters; synchronous motor ASDs may need more.)

10. If the existing constant speed motor is a totally enclosed fan cooled induction motor, how would additional ventilation be provided if needed, when operating at lower speeds using an

11. How much derating of the existing motor would be necessary for heating caused by harmonics? Is this derating acceptable?

12. If the machinery is a pump, fan, or compressor, what data sheets or test means are available to estimate the operating characteristics of the unit?

13. Are data, drawings or other means available to estimate the torque requirements at various speeds for machinery other than pumps, fans, or compressors?

14. What drawings or other means available to validate the construction or installation details of the motor and machinery involved?

ASD?

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