The supporting structure for the electric machine must be such that the machine can be mounted
using its allowed mounting positions, see chapter Allowed mounting positions.
The mounting space must be adequate for the machine mounting and possible auxiliary
components. See the length and the diameter data of the machine from the product drawing.
Main dimensions of the machine are shown in the Figure below (not an exact illustration of the
machine).
Figure 9. Main dimensions of the machine
Symbol Explanation
L
F
Length of the machine frame (including the connection box(es).
L
S
Length of the shaft (from the end of the shaft to the machine D-end mounting shoulder).
D
M
Diameter of the ange mounting bore circle.
D
S
Diameter of the mounting shoulder.
For all dimensions of the electric machine, see the product drawings.
Shaft alignment and load
Improper alignment (misalignment) may result in bearing overloads, premature bearing failures, vibrations and shaft
failures. Flexible coupling does not compensate for excessive misalignment.
The type of the electric machine shaft is cylindrical shaft with diameter of 70 mm h7 and contact
length of 130 mm. The ange type is SAE 1/2 Transmission housing.
Alignment between the shaft and mating structure must be accurate.
The misalignment can be parallel or angular misalignment, or combination of those. With parallel
misalignment, the center lines of both shafts are parallel but they are offset. With angular
misalignment, the shafts are at an angle to each other. Figures below illustrate the parallel and
angular misalignment.
EM-PMI540-T3000
4. Design principles
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Danfoss | Produced By: Danfoss Power Solutions | November 2018
| BC265857716810en-000103
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