Rewinding an electric motor armature is one of the types of repair of commutator industrial and household DC and AC motors carried out by our company. The need to repair an electric power unit of this type arises during its long-term operation. Unlike asynchronous motors, commutator motors contain rubbing parts - current-carrying brushes and a commutator. This design feature determines the frequency of current and major engine repairs in accordance with the maintenance plan.
In some cases, before repairing an electric motor armature, it is necessary to identify the causes of the failure using instrumental methods. This could be an interturn short circuit or a break in the lower layers of the armature winding. By checking the resistance, it is possible to determine this reason. The only way to restore functionality in this case is to rewind the armature of the electric motor.
Repair of electric motor armature
Scheduled preventive maintenance of an electric motor armature is carried out after a certain period of its operation. As a rule, it includes the restoration of the movable contact group (collector). In cases of sudden failures or significant deviations in the operation of the electric motor, urgent repairs of the electric motor armature may be carried out. The basis for such repairs may be one of the reasons or their combination:
- strong sparking at the point of contact of the brushes with the commutator;
- reduced engine power;
- increased heating of the housing.
To repair the electric motor armature, it must first be dismantled. After this, the anchor removed from the engine is carefully inspected to identify burnouts, melting, breaks, and other visible defects. During a visual inspection, pay attention to the integrity of the windings (local blackening), the degree of contamination of surfaces with graphite dust, and extraneous (characteristic) odors of burning insulation.
Where to rewind the armature of an electric motor
Quality rewinding of an electric motor armature is possible only with the use of special equipment. This technological operation is similar in complexity to rewinding the stator. Our workshop has the necessary tools and equipment for rewinding the armatures of commutator electric motors.
An anchor is a movable structural element that rotates at a high angular velocity. In this regard, it is affected by significant centrifugal forces. Therefore, rewinding of the electric motor armature must be complemented by its high-quality balancing. After rewinding the electric motor, impregnation and drying, it is necessary to carry out the final operation - dynamic balancing of the armature on a special balancing machine. Neglecting this will lead to significant vibration, destruction of bearings and armature.
The price for work on rewinding an electric motor armature will always be lower than for the purchase of a new electric power unit. In many cases, restoring the electric motor armature is the only way to repair the electric drive, since selecting a new commutator motor can be difficult due to the characteristics of the installation location.