Replace your old DC motor for new one!

  • Restore and improve

Restore and even improve the quality of your existing Electrical Maneuvering System! We will buy your used motor and deliver a brand-new one of your choice, Performance or Standard Series DC motor. Contact us for more info.

  • Efficiency above 70 %

Therefore, timely replacement of the DC motor is required. Our new DC motors, designed specifically for our Performance Series, feature not only an unrivalled run time of up to 12 minutes per hour, but also have a record high motor efficiency above 70%.

The companies Elprom EMS JSC and Balkancar “G.Kostov” have collectively produced more than 100,000 DC motors for marine application, the majority of which are used as part of thruster systems. Leading thruster brands, such as Vetus, Max Power, Side-Power, Lewmar, Engbo, Craftsman Marine, etc. use DC motors, designed and manufactured by us. Almost all world-renowned leisure boat manufacturers rely on our DC motors in tunnel thruster configurations. 
Many of these were produced 10-15 years ago. Unfortunately, the DC electric motor is not a “perpetual motion machine”. Following the sixth year of its production, the efficiency of the electric DC motor significantly deteriorates due to decreasing electromagnetic induction. The primary reason for that is corrosion of the steel elements of the DC motor. Exposure to seawater and seawater-air aggressive environments causes corrosion of the metal housing, magnets (especially if sintered), shafts, bearings, etc. The magnetic properties of steel components (metal housing, magnets, etc.) are also negatively affected by high temperatures and overheating of the DC motor when run continuously. The component which is most subjected to wear and tear is the commutator, due to the constant friction between its segments and the brushes. Commutator segments gradually become thinner which increases their electrical resistance. As a result, overheating and sparking frequently occur when the motor is powered up. Friction also leads to excessive wear and chipping of the brushes, but mostly to dust accumulation. Dust and debris from the brushes then start permeating the whole brush-commutator apparatus and infiltrate into the motor. That additionally demagnetizes the metal parts of the DC electrical motor.  Initially, standard DC motors have about 60% efficiency, but their efficiency diminishes to 40-30% or even more after six years. Such motors overheat easily and their duty cycle is severely shortened, i.e. they automatically shut down when run more than 1.5 minutes continuously, instead of the usual 3-4 minutes of continuous operation. Loss in efficiency comes together with lower power delivered by the DC motor as well as higher amp draws from the battery, which makes the thruster system demand much more from the electrical installation on board.