Robitronic
Pro-Master Manual
PC Software
35
Test results
Evaluating the results
Many different opinions exist on this subject, and after gaining some experience with Pro-Master,
you will also develop your own strategy for assessing results.
The data that are of primary importance are the maximum power, the maximum efficiency, the
maximum RPM, the average power and the average efficiency. The maximum RPM can be used to
compute the proper transmission ratio. From the maximum efficiency we derive the RPM range for
most efficient operation. The average efficiency provides information about the efficiency of the
motor over its complete RPM range; i.e., the higher the average efficiency of the motor, the less
current it consumes. The average power provides information about the motor's acceleration.
Comparing results
To enable comparison of results, the voltage set for the motor check must be identical for the two
sets of data. A simulation voltage of 7.5 volts is preset, corresponding approximately to a racing
battery pack with 6 cells.
Technical note on motor checking
Pro-Master simulates a battery pack with adjustable voltage and constant internal resistance (40
mOhm = 0.04 Ohm). The resulting voltage curve on starting the motor corresponds to the battery
pack in a model car. The voltage for the battery simulation can be changed in the program settings.
The default value is 7.5 volts, corresponding to a battery pack with 6 cells. The maximum voltage on
the motor during a test run is certainly under the set value. The maximum voltage on the motor
depends on the current consumption of the motor at maximum RPM and can be computed as
follows: motor voltage = 7.5 V - (motor current (in amps) x 0.04 ohms).
Robitronic
Ing. Robert Schachhuber
Stutterheimstrasse 16-18, A-1150 Vienna, Austria
Tel.: 0043-1-982 09 20, Fax: 0043-1-982 09 21
e-mail: [email protected]
Internet: http://www.robitronic.com
