WinGD X72DF - Application Constraints

Marine Installation Manual 2021-08 4-103
4 Ancillary Systems
4.12 PTO, PTI, PTH and primary generator applications
X72DF
The following table itemises the arrangements corresponding to the numbers in
Figure 4-55,  4-102.
Table 4-17 PTO/ PTI /PTH arrangements for the WinGD X72DF
4.12.3 Application constraints
The feasibility of project-specific PTO /PTI /PTH and primary generator needs
to be studied in any case. An overview about impacts is given in Table 4-19,
 4-104.
Table 4-18 Possible options for the WinGD X72DF
Permanent Magnet
In cases where ‘Permanent Magnet’ type generators or electric motors are in-
stalled, special attention must be given to the alignment issue. Due to the low
rotor mass in relation to the magnetic forces, a potential risk of unloaded shaft
bearings may exist. In addition, bearing load measurements may be falsified by
the influence of the permanent-magnetic pull force.
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16]
(X) (X) (X) (X) X X X X X X (X) (X) X X X X
X
(X)
= the arrangement is possible
= the arrangement may not be possible (too high nominal generator /el. motor torque due to too
low nominal engine speed and/or high generator / el. motor power)
NOTE
In any case please check the application of arrangements for the
selected engine with WinGD via their licensee.
Project dependent options can also be considered.
Arrangements (see Figure 4-55,  4-102)
Option [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16]
PTO X X X X X X X X X X X X X X X X
PTI X X X X X X X X X X X X X X X X
PTH O O O X O O X X O O O O O O O O
Primary generator O O O O O O O O (X) X O O O O (X) X
Remarks
a)
a) If the lowest torsional natural frequency is < 1.5 Hz, special care has to be taken regarding possible engine speed fluctuations.
a)
b)
b) In case the electric generator / motor is operated at variable speed (CPP combinator mode), a frequency converter is needed.
a)
b)
a)
b)
c)
c) With de-clutched propeller and pure generator operation, the minimum engine load requirement has to be obeyed.
c) a)
a)
b)
c) c)
X
(X)
O
= the option is possible
= the option is possible, however uncommon
= the option is not possible