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Commutator Conditions: Problems and Causes
The commutator should have a smooth film and consistent color. The film should be from light to dark brown. A streaky film is often a warning that the commutator might thread. If this is the case, fine copper dust will be found on the brushes and brush rigging. Bar marking, where some bars are lighter…
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Helwig Carbon’s Comprehensive Guide for Industrial and Railway Technology
The name “brushes” comes from bundles of tiny copper wires, which were used as elastic contacts at the starting period of the electrical engineering industry. The term “carbon brush” appeared with the change to materials made out of graphite and carbon. Carbon brushes have been developed for several decades: they are also indispensable hardware for…
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How to Order a Carbon Brush
Need help identifying brush problems or determining the correct carbon brush for your application? Click the link below to download a guide to help you determine the carbon brush you need. Identify Brush Problems
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Helwig Carbon’s HCP™ Sensor
Worn carbon brushes cause commutator damage. Carbon brushes are worn down by use. If the brush becomes too short there is a risk of electrical wear to the contact surface, primarily caused by arcing and sparking. This results in serious damage to the commutator and the motor. It is important to replace worn brushes before…
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Helwig Carbon Celebrates 85 Years of Innovations
The technical product innovations developed by Helwig Carbon Products have received universal acceptance over many decades, have been copied by carbon brush manufacturers world-wide, and are still in use today. There is no question that the development of carbon brushes was key to the future of electrical machines as the primary drive system of the…
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The Helwig Commutator Condition Guide
Helwig Carbon’s Commutator Condition Guide shows you how to avoid costly motor and generator repairs and unscheduled downtime by recognizing possible problems before they cause serious damage. Two major indicators of possible problems are: commutator irregularities and inconsistent film formation. To learn more, click on the link below. Commutator Condition Guide Brochure
