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4000 SERIES
THRUSTERS |
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The SEA MAX THL-404-8
Thruster is the result of more than 20 years of deep
ocean engineering experience in the design and
manufacture of ROVs. It provides up to two shaft
horsepower and is extremely reliable, even in the
demanding underwater environment and during long,
continuous use. It is a true brushless servo motor
thruster that permits very exact output power regulation
and is therefore ideal for use with precision feedback
systems such as autodepth and autoheading.
The thruster is powered and
controlled by a vector drive type electronic drive module (EDM), one EDM for each thruster. The EDM provides
up to 2.5 kW of power in a closed loop, factory
calibrated system and controls the motor speed by
estimating the orientation of the permanent magnet flux
vector to determine the thruster motor shaft rotational
position. It connects directly to the thruster and is
powered from an AC or DC source over a range of
voltages. The drive does not require that a resolver be
installed in the thruster for motor commutation, yet it
is fully backward compatible with earlier THL-404-8
Thrusters which include resolvers and use resolver
type EDMs. The drive also includes an RS-485 serial
interface which is used to configure the drive and to
monitor its performance using a PC or other host
computer. |
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Tech Specs:
SEA MAX THL-404-8
Thruster |
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Thruster motor |
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Long life brushless |
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Thruster MTBF |
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10,000 hours estimated |
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Forward thrust |
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95 lb, ±5 lb (43 kg, ±2.3 kg) |
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Reverse thrust |
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95 lb, ±5 lb (43 kg, ±2.3 kg) |
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Operating depth |
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3000 meters standard, 6000 meters optional |
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Shaft horse power |
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2.0 hp at 120 VAC into EDM |
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Shaft speed |
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1480 rpm at 120 VAC into EDM |
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Shaft seal type |
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Ceramic and graphite |
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Housing type |
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Pressure balanced oil filled (PBOF) with tattle tail for
visual oil level verification, and quick disconnect
fitting for oil filling |
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Oil type |
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Food-grade mineral |
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Housing material |
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Hard-coat anodized aluminum |
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Nose and Nozzle |
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Nylon |
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Propeller material |
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Hard-coat anodized aluminum |
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Connecting cable |
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4-foot oil filled with 12-pin Wet-Mate type connector
standard, factory installed; other lengths optional |
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Size |
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Nozzle diameter = 10.30" (26.2 cm)
Overall length = 18.35" (46.6 cm)
Motor diameter = 4.50" (11.4 cm) |
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Weight in air |
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26 lb (11.8 kg) |
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Weight in water |
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16 lb (7.3 kg) |
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