DC Motors
Unleash the Energy Revolution with DC Motors: Power, Precision, and Performance Amplified!
Ramakrishna Electrical Winding Works
DC Motors
DC motors are well known for their high start-up torque and variable speed. They are ideally used in industrial and marine application such as steel rolling mills, ship propulsion, mine hoist, fan drivers, mixers, and extruders.
But these machines are highly Complex in design and structure. We at RKEWW have the infrastructure and special team of skilled technicians, who have handled copious machines for different ratings from fractional power to 5 MW. Some of our services include repair, rewinding, overhauling, in situ commutator skimming & balancing, carbon brush arrangements, troubleshooting and custom manufacturing & supplier of parts based on the client requirements.
It is a plate mill DC motor armature with a rating of 2500 H.P 30/75 RPM 700 V General Electric made, weighing 45 Tons and it belongs to Jindal Power & Steel Mill. The scope of work includes complete rewinding of the armature with newly manufactured coils, testing, balancing and commissioning. As this machine was manufactured 50 years ago, the OEM used class B insulation. We at RKEWW re-designed and enhanced the insulation scheme to Class H. New coils were manufactured using Class H insulated electrolytic copper and all the electrical test were conducted on individual coils prior winding. These coils were placed in the armature slots and upon wedging, the end winding was TIG welded to the commutator risers. Resi-Glass bindings were applied under high tension after successful completion of the Drop test.
The armature is pre-heated, dipped in the Class ‘H” varnish and cured under 180C. Final testing and Dynamic Balancing was conducted to ensure that the armature is free from both electrical and mechanical issues. The entire job was done within 45 days upon arrival of the armature at our works.