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Saab Seaeye Brushless DC Thrusters Saab Seaeye logo



Seaeye Brushless DC Thrusters
Saab Seaeye was the first manufacturer to successfully introduce reliable brushless DC motor technology for ROV propulsion in the mid 1980s and won technology awards for their thruster innovations. Part of this development was to incorporate the drive circuitry within the thruster housing. Today, all Seaeye Thrusters incorporate:
  • Closed loop velocity feedback for precise response to input commands
  • Self contained drive electronics within the thruster housing
  • Titanium shafts for lightness and strength
  • Angular contact thrust bearings for longer life
  • Fouled propellor detector and reset circuitry
  • Under voltage protection of the electronics
  • Tungsten carbide shaft seals
  • Integral pressure compensation for full ocean depths of operation
Two models are currently available, the Seaeye SM4 and Seaeye SM5, with new models due for release.

Specification Seaeye SM 4 Seaeye SM 5
Voltage 250 vdc ± 10% 250 vdc ± 10%
Current 4.5 amperes normal running 4.5 amperes normal running
Shaft horse power 1.1 shp 1.1 shp
Thrust 25. Kgf @250 vdc /
4.5 a / 2000 rpm		 38 kgf @250 vdc /
4.5 a / 850 rpm
Weight in air 3.7 kg 8 kg
Weight in seawater 2.2 kg 4 kg
Depth rating up to 2500m up to 2500m
Dimensions housing o/d 81.3 mm housing o/d 87 mm
  nozzle o/d 173 mm nozzle o/d 303.8 mm
  length 260 mm length 363.5 mm
Control signals speed signal: pwm speed signal: pwm
Electronics 24 vdc / @200 ma reversible for direction control 24 vdc / @200 ma reversible for direction control
Connector:
7 pin seaeye metal shell		 2 pins for 250 vdc power
2 pins for 24 vdc power
1 pin for speed signal
1 pin for earth		 2 pins for 250 vdc power
2 pins for 24 vdc power
1 pin for speed signal
1 pin for earth
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