Deep water application

Hi,

We are investigating an electric drive for a deep water application (down to 4000m).
A rough specification is as follows:

• Speed range 0 – 360 rpm

• Max torque in the range 60 – 80Nm for a period of 1-2 sec.s, then reduced torque in the range 10 – 50Nm for the rest of the duty cycle. Repetitive cycles that last typically 100 sec.s. The drive will be operative for typically 16 hours, then rest for 8 hours and start all over again.

• Aimed liftetime is 3000 hours.

   

  Question 1:
  Will the Goldline servomotor ME-205-A serve this application?
  This was the most appropriate motor I could find entering the “Goldline S Series Submersible Servomotors” link.
  
  Question 2:
  I have specified an ME rather than a M version, but positioning accuracy is not critical. What is the difference  between a framless resolver and a commutation encoder?

   

  Question 3:
  Are the Goldline servomotors prepared for pressure compensation, i.e. the motors may be filled with thin oil connected to a compensation hose/bellow?
  
  Question 4:
  Will flying leads be the best choice for a deep water, pressure compensated motor?
   

  Question 5:
  In order to reach the specified speed range and torque, a Goldline P1C gearhead is looked at (reduction ratio 10:1).
  Can this gearhead be used for deep water application, i.e be pressure compensated?

   

  Question 6:

  Will the P1C planetary gearhead fit directly on to the ME-205-A motor, and such that the complete unit (motor + gearhead) can be pressure compensated?