Specifications

Comfort Reference Value – 5th Generation of STÖBER Inverters STÖBER
ANTRIEBSTECHNIK
4. Representing the Reference Values in User Units
KSW-11
You can now enter the gear ratios within the lower range of the page (Figure 4-6). There
are two ways to do this:
1. You already know the mathematical relationship between the torque of the motor and
the machine in user units. If this is the case, enter the ratio directly in D87 numerator
(torque on output) and D88 denominator (motor torque).
2. You do not yet know the relationship. If this is the case, the Assistant will help you with
the calculation. Proceed as described below:
• Enter the ratio of the gear unit installed on the motor and degree of efficiency. Enter as
precise a value as possible to prevent rounding errors. You will find the precise ratios
in the catalogs for STÖBER ANTRIEBSTECHNIK GmbH+Co. KG gear units.
• You can parameterize another ratio in the boxes n3 and n4 (ratio of the speeds), Z3
and Z4 (ratio of the numbers of teeth) or D3 and D4 (ratio of the diameters). Also enter
a degree of efficiency for this ratio. If there are no further ratios in addition to the gear
unit on the motor, enter the ratio as 1:1 and the degree of efficiency as 1 in the boxes.
• The last step is the conversion of the torques after the last ratio in user units has been
entered. Click either the “Force” (Kraft) box or the “Torque” (Drehmoment) box. Then
enter the conversion factor between force or torque and the user unit in the input
fields.
Example:
3.5 Nm corresponds to one user unit.
In this case click the “Torque” (Drehmoment) box and enter the factor 3.5 in the input
field.
• Press the button “Calculate” (Berechnen). You will then find the results in D87 und
D88.
Figure 4-6 Calculation of the ratio