Brushless DC motors aimed at sub-sea vehicles
An
Electric Motor Applications product story
Edited by the Engineeringtalk editorial team
May 2, 2001
Aveox has introduced a range of Hall commutated motors and drives which are finding applications for sub-sea vehicles, where motors need to be unaffected by possibly high temperatures and contaminants
In applications such as underground pipe inspection devices and sub-sea vehicles where electric motors are used to provide vehicle movement via wheel, track or propeller and controlled movement of cameras and such like, it is vital that the motor and drive system can be relied on.
Motors for applications such as those described need to be long lived, unaffected by possibly high temperatures and contaminants (or fully sealed against them), small, powerful, efficient and simple to control.
Quite a challenge! These needs point towards a brushless DC motor as the optimum solution.
Aveox, well known as a company, which solves the problems which others, cannot, have introduced a range of Hall commutated motors and drives, which are finding applications for sub-sea vehicles.
A typical "off the shelf" solution is a motor measuring only 45.5mm diameter, 87mm long.
Designed for operation from DC voltages from 12 to 42 volts, the no load rpm per volt is 325; torque constant is 4.16 in-oz (29.38mNm) per amp.
Maximum continuous current is 19 amps (and so 0.56Nm).
The maximum efficiency of 90% is achieved at 13 amp, 36 volts.
Maximum case temperature is 80 C.
A small (3.75 x 2.323 x 0.875 inches), 500 watt drive card is also available "off the shelf".
Special to application motors and drives are possible for any voltage and for operation at elevated temperatures and in harsh environments.
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