Simrad DD15 Direct Drive
10 20222303 / A
• The highest possible efficiency compared to any other
gearbox.
• All forces are equally spread over 3 gear teeth in stead of
one allowing a much compacter and stronger solution.
• The forces and torques from the motor to the output shaft
remain in the center line of the drive unit, resulting in a
higher efficiency and extremely reduces the loads on the
housing and other internal parts.
2.3 Electro magnetic clutch
On the moment the mechanical steering system on the yacht is
manually operated, the autopilot drive has to be disconnected
from the steering system. This is achieved with the unique and
patented electro-magnetic engagement clutch, controlled
automatically by the autopilot computer. The solution is based
on two electrically operated spring loaded clutch pins that
engage and disengage the outer gear ring of the planetary gear
step. This solution has multiple advantages over the existing
friction plate clutches:
• Less friction to back drive the unit.
• Lower power consumption (1.2 Amp. at 12 Volt). When the
clutch is not powered, it is disengaged.
• The clutch doesn't wear in time.
• More compact than any friction clutch.
• When the autopilot is switched off, the helmsman is not
suddenly confronted with the full rudder torque, but has to
put load on the wheel to equalize the forces so the clutch can
disengage, making the manual take over much safer.
To Next Page
Loading...
