Precious Metal Brushes vs. Graphite Carbon Brushes

If you have heavy-duty start-stop applications, such as pumps, graphite brushes are the most effective choice. If you find that bidirectional reciprocating motion is required, these brushes can withstand the corresponding high current spikes generated. For optical systems, these brushes are insufficient due to the graphite dust they produce.

If your application does not require the robustness of graphite brushes, such as in blowers, precious metal brushes should be the preferred choice. This cost-effective solution is typically used in designs that operate continuously with lower current loads. Although this brush choice is more sensitive to arcing, WKX MOTOR's precious metal brush DC motors feature CLL, a long-life capacitor that utilizes RC filters between commutator segments to suppress brush sparking. The use of the CLL concept also reduces overall electromagnetic radiation and increases terminal capacitance, which acts as a short circuit for rapid voltage changes. Additionally, higher terminal capacitance prevents no-load current in the motor itself and reduces overall temperature increase.

Overall, if you find yourself stuck in indecision and need help or assurance with your choice, our experienced global sales engineers are waiting for your call. If you're unsure who to contact, please visit our website at http://www.wkxmotor.eu.