A classic originally published more than fifty years ago:
To avoid either of these messages and get meaningful resultsit is best to have test data points that are widely separated in at least two of the three parameters Voltage, Current, and RPM. Entering Motor Data from a Catalog If all you have available to you is the data from a manufacturer's or mail order company's catalog, you may still have the information that MotoCalc needs to determine the motor characteristics.
The Catalog Data Input window is designed to make sense of this information. The Catalog Data Input window will appear.
There are four pieces of information that you need to find out from the catalog. The first two are: Nominal Voltage - the voltage that the motor was intended for.
Any two of the following are required: Current at Maximum Efficiency - the current, in Amps, at which the motor is most efficient.
Stall Current - the current, in Amps, that the motor draws if the armature is prevented from turning when being fed the Nominal Voltage. No-load Current - the current, in Amps, that the motor draws at the Nominal Voltage when there is no load on the motor shaft.
As you fill in these fields, MotoCalc will calculate the motor characteristics as soon as it has enough information for each one. The grayed-out fields of the Catalog Data window show the computed characteristics as they are being calculated.
Note that as soon as you type values into two of the three current fields, the third becomes Grey, because it is now being calculated by MotoCalc instead of filled in by you.
For those of you who are mathematically inclined, the relationship between No-load Current, Maximum Efficiency Current, and Stall Current is: Note that data from a catalog can be notoriously inaccurate.
See the Caveats section for more details.Reference: Joseph Smith, His Family and Friends Able D. Chase signed the above statement in our presence, and he is known to us and the entire community here as a man whose word is always the exact truth and above any possible suspicion.
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