DC Motor Collectors

DC Roundness and Roughness of Motor Collectors (Commutator)

A zero or newly arranged collector averages 20 µm. should be round. This is DC. It means vibration of Motor Collectors in µm. The protruding slices should not be larger than 1 µm. Higher frequencies outside the circle should have a smaller amplitude of motion. If a universal motor roundness exceeds 5 µm, it should not exceed 1/10 of the collector circumference. The average smoothness (Rz) of the collector is 2-4 µm to provide the best contact surface. It should be around.

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DC Motor Collectors operation :

Commutators can be turned or ground. The low feed surface of the cut must be thoroughly cleaned after turning to ensure a good finish using a diamond-tipped tool.
-Cutting speed: 100-120 m/min
-Cutting depth: 0.05-0.1 mm
-Feed rate :30-50 µm/rev
Sharpening the commutator by turning the commutator in the opposite direction with a grinding wheel will give you better results. Sharpening with EI does not give very good results. This situation requires both experience and should be considered in emergencies or if the machine can be stopped in a short time. A rubber buffing stick can be used to thin the thickness of the patina, but this will not remove the burnt spots.

DC Motor Collector

DC motor is the most widely used motor type. Brushes are used to provide movement at the coiled points of these motors. The part where the brushes are in contact is called the DC motor collector. A magnetic field is created in the stator and remains there. A current is generated in the voltage winding conductor. It will be possible to say that there is a force applied to the conductor on which current is flowing. The rotor, which is the type commonly used in asynchronous motors, moves with the effect of this force. In order for this motion to continue, the applied force must also be continuous. A continuous tension is provided by the brushes.

The DC motor collector, on the other hand, is the most troublesome area in motors and it constantly fails. For this reason, periodic maintenance will be needed. The stiffness of the springs, which are pressed on the springs of the brushes, has a direct effect on the engine life. If the springs are excessively hard, various deformation problems will be seen. For this reason, the motors should be maintained at periodic intervals, and during the maintenance, the brush and DC motor collector should be examined. If there is a shortening in the length of the brushes in the motor, then the deformation should be removed with sandpaper. Cleaning the dust that occurs with friction will also prevent a possible malfunction.

It would not be wrong to say that the type of motor that needs the most maintenance is the DC motor. Brush and collector compatibility should definitely be considered. If maintenance is not provided, it is a fact that irreversible problems will occur in the engine. If there is a problem at these points, it should be resolved immediately. Necessary precautions should be taken for parts with carbon brushes and DC motor collectors. The main task of the brushes will be to ensure that the electric current is transmitted to the different parts on the collector. It is also present as a thin layer on the collector, depending on the brush type and technical features. This thin layer is generally produced from carbon dioxide. The color of the layer will help us to have information about the DC motor. You can contact our company immediately to procure a new collector at affordable prices.

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