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   DC and Traction Motors

Your DC motors, generators and Traction motors are in the hands of experts at M&C, based on over 50 years’ experience in the industry. Specialised repair services include:

  • Dobeycan class H polyester insulation system that offers the following advantages:
    • increased mechanical strength and flexibilit

In addition to this we also offer:

  • Insulation materials and significant amounts of copper stock in order to reduce turn around time on repairs.
  • Verification of insulation systems and optimisation.
  • Vacuum Pressure Impregnate (VPI) armatures, fields and inter pole coils using a Polyester based resin specifically designed for DC motors.
  • Re-engineering of existing coil designs to accommodate the latest insulation technology and deliver improved motor performance.

Each direct current motor and generator or traction motor is also thoroughly tested in our advanced DC test bay. These tests include:

  • 600 kW full mechanical load test using an eddy current dynamometer, enabling us to determine the motor's exact performance under various load conditions.
  • Black Band Test.
  • Drop test.
  • Comparator test.
  • Polarity test

DC and Traction Motor Quality Control DC and Traction Motors

DC and Traction Motor Refurbishment

 

Listed hereunder are but a few of the DC motors and DC generators that M&C have repaired over more than 50 years in the armature winding industry.

2125 hp, 620V, 78 rpm, Armature, Metropolitan Vickers, for Wesizwe Platinum via Dowding, Reynard and Associates (DRA)

This is one of three armatures that M&C is fully rewinding and refurbishing.

The scope of work include the complete rewind of these huge armatures as well as the refurbishment of the commutators..


Our expertly trained armature winder artisans (trained in the Savcio training centre) re-insulate the equaliser ring of this DC motor.

One of our expert armature winders is doing the final inspection on the competed armature rewind. This photo gives a perspective as to the size of this armature..


The non-connection end of the new armature winding also clearly show the equalizer circuit.


The commutator side of the new armature winding shows the carefully soldered connection between the armature windings and the risers of the refurbished commutator.

The replacement of the commutator will be very expensive and the lead time would be very long. M&C fully refurbished this commutator that is more than 50 years old.

The photo shows the completed armature after the armature rewind and commutator refurbishment as well as other minor mechanical repairs.

DC and Traction Motors

DC and Traction Motor Testing

DC and Traction Motor Repairs


Marthinusen & Coutts (Pty) Ltd., was founded in 1954 by a unique group of men, each one recognised as a leader in his particular field in the repair and service of rotating electrical equipment.
Copyright © Marthinusen & Coutts 2008

Tel:
+27 (0)11 607 1700 | Fax: +27 (0)86 524 0757

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