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Submersible and ROV Motors
| Silvercrest and the SME Group design
and build specialized motors, and support packages for use on ROVs
in the offshore and subsea industry. These motors are usually oil filled and pressure compensated. Common operating voltages are between 2300 volts and 3300 volts - even for small 5kW motors.
Certain motors can operate down to depths of 4000 metres. Our partner SME manufactures new Submersible and ROV motors. SME also services and repairs all brands of Submersible and ROV motors. Including Hitachi, Pleuger, Grundfos, Mercury, Byron Jackson, Haywood Tyler, and Franklin. SME is a 100% owned and operated Australian company. Where the core business is to manufacture, supply and service submersible electric motors. Thirty service orientated staff members have the ability to service and technically support all makes and models of submersible electric motors at their Perth facility. The sales department, with a total of 75 years experience in the submersible and electric motor business, are happy to assist with any enquiries on the purchase of submersible motor engineering products ranging from 3.7kw to 1500kw, in various voltages and frequencies.
In the 1200 ft workshop facility, purpose built for the manufacture and service of submersible electric motors, SME offers the following in house services:
SME are a fully integrated manufacturing facility. In addition to a standard range of motor products SME also produce the following:
SME are also able to provide the following services:
SUBMERSIBLE MOTOR SYSTEMS.
INTRODUCTION. Silvercrest in conjunction with SME are able to offer a complete range of submersible motor systems to meet the demanding requirements of the ROV, sub-sea trenching, and manned submarine industries. Manufactured to exacting standards, our motors are more competitively priced than any comparable motors on the market today. ROV / TRENCHING REPLACEMENT MOTORS. We offer a standard range of direct replacement motors, designed as a direct replacement to fit into many of the more popular ROVs and trenching systems in use today (for example, the Perry, Hydrovision and Slingsby underwater systems). Bespoke Manufacturing: Silvercrest can offer bespoke manufacturing of motors to meet your specific requirements. We recently completed the design of a 290HP / 300VAC trenching motor for use in subsea trenching operations. Also available upon request are matched High Voltage Transformer Units (HVTUs) and electronic soft starts for each standard replacement motor. HVTUs are custom built to your specification.
Our standard ROV / Trenching Replacement Motor Range include:
MANNED WET and DRY SUBMARINE PROPULSION SYSTEMS. Historically, over the last fifteen years electrical submarine thruster systems have been problematic. Notably AC motor controllers and DC brush motor powered thrusters have been the cause of many a company’s downfall. Other problems such as 120VDC battery buss voltages have compounded the overall problem. Since the early tourist submarines first came into use during the mid 80’s, motor controller technology has steadily developed. Certain manufacturers have produced systems which have proven to be more capable and more importantly, reliable than their early counterparts. Unfortunately, this leaves quite a few of the older tourist and research submersibles struggling with the older unreliable systems that are still in use. A little known fact is that motor drive systems have a finite operating life, indeed they have a ‘shelf life’. This is due to the deterioration of the large capacitors used in the drive controllers. This occurs even when the drive is not in use. If a drive is more than five years old, then it’s capacitors are already approaching the end of their useful life. As a result these drives are now becoming tired and often prone to failure. Usually with accompanying pyrotechnics!
Once the problems have been identified and assessed, where needed, we will re-design your battery buss arrangement to produce a working voltage suitable to run a reliable and powerful thruster system. We will then design the motors specifically to meet your requirements. The pressure compensation system is added and the final stage of the design process is matching the correct drive with your new motors. Recently Silvercrest completed the installation of our 69kW (6 x 11.5kW) AC propulsion and ballast system into one of the Odyssey class tourist submarines in Southeast Asia. The system utilizes a state of the art, purpose built, 11.5kW thruster / ballast pump motor. A custom built submersible, 3 phase, AC, squirrel cage induction motor encased in a 316 Stainless Steel compensated housing. The motor was designed specifically to match the available buss voltage and it’s dedicated motor invertor controller. The Silvercrest motor is smooth, quiet and powerful.
A twin Burgmann tandem mechanical shaft seal arrangement, fitted on each motor shaft, provides protection from water ingress. This works in conjunction with a custom built 33 Lt capacity oil-filled central motor compensation system. Great attention has been applied to designing our motor systems for reliability and a long working life. All components are rated to at least 150% of required working capacity. This over rating of individual components ensures that no single part of the system can ever be overloaded during correct use. Specific motor functions and operational profiles can be catered for and programmed into the CT controller. For example the Odyssey system has a ‘Turbo’ function, whereby the motors run normally with a 7.5kW max output. At the flick of a switch on the pilot’s console, the motor can be enabled to output it’s maximum 11.5kW (for 1½ minutes) for use in maneuvering emergencies. Motors and drives of various ratings are available from Silvercrest, utilizing many of the same frame parts. For example our 15kW motor utilizes the exact same parts as the 11.5kW unit, but with more motor laminations and therefore a slightly longer body. This reduces your spares requirement even when mixing and matching the motor sizes. Military spec versions of the motors are also available on request.
Silvercrest offer a return to dealer, two-year warranty on all parts, subject to correct usage and subject to our standard terms & conditions. Silvercrest 11.5kW / 240VAC Thruster Units as fitted to a Tourist Submarine. General Specification.
Depth Rating 3000 Mts
Type Compensator Type Expanded bellows * Actual dynamometer measured
WD Sump Pump / Slurry Pump Submersible Motors.
The motor winding compartment is air "filled", with an
oil chamber for the mechanical seal/oil seal chamber. These IP68
motors are designed for vertical shaft down operation driving pumps.
SME can provide this range of motors with a variety of flange and
shaft options. These motors can be provided with mounting facilities
to suit the bulk of OEM products available today and also with the
option of standard IEC or NEMA shaft and flange dimensions. SME
can offer different mechanical seal/oil seal, and thrust bearing
arrangements to suit different customer preferences and requirements.
SME motors are generously rated by design so they can tolerate overloads, lack of cooling, and general abuse. They can run under full load for 15 minutes not submerged with no external cooling - hence the name "Wet AND Dry". The motors are fitted with moisture detectors and thermal protection. Provided these are properly connected and set up to give advance warning of problems, these motors should give many years of reliable service, provided regular maintenance is undertaken by suitably qualified service technicians.
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Silvercrest
has developed a new ‘replacement’ propulsion system
for both new build and existing manned submarines. We tailor the
installation to solve your propulsion requirements. Plus we will
visit you on-site to assess your installation and determine the
best route forward to solve your problems.
Motor
control is supplied through a CT Commander SE invertor controller
drive. Manufactured by one of the leading drive manufacturers in
the world today. Each drive utilizes digital control using an onboard
processor with EEPROM data storage. This allows the drive to store
operating parameters and it’s own operating history for maintenance
and fault diagnosis purposes. 
SME
"Wet and Dry" motors are designed for use with "sump
pumps" for continuous submergence to a depth of 10 metres in
water, slurries, sludge, effluent, sewerage, and other liquids.
These motors can offer a robust alternative to other units that
suffer from shorter operating lives with no changes to the existing
wet end performance.
