Common knowledge of carbon brushes for electric tools
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Release time:
2021.08.25
The fan on the armature rotates to draw outside air in through the vents, and the rotating fan then allows the air to flow through the interior space of the motor to cool the motor.
2. Capacitor for noise suppression
When using electric things equipped with series-excited motors, sparks will occur in the commutator and carbon brush of the motor, which will disturb radios, televisions, medical equipment, etc. It is necessary to suppress capacitors and anti-current coils on electric things to play an anti-jamming role.
3. How to reverse the carbon brush of power tools?
The reverse rotation of the vast majority of electric things is completed by reversing the direction of the current. By changing the electrical connection of the circuit, the reverse direction can be completed.
4, carbon brush?
When the electric thing is working, the carbon brush plays the primary role of the bridge, connecting the inductor coil and the armature coil with current.
5. What is an electronic brake?
Due to inertia, the armature will continue to rotate after the machine is broken, and several bottles of electromagnetic field still remain in the stator. At this time, the armature and rotor act like a generator, and torque occurs. The direction of the torque is exactly opposite to the direction of the rotating armature.
6, frequency on the impact of electric things
China now supplies 50HZ alternating current, but some countries use 60HZ alternating current. When 50HZ electric things use 60HZ current, or 60HZ electric things use 50HZ power, it has no effect on electric things (air compressor is outside).
7. Pay attention to the normal protection of the carbon brush of the power tool. For example, the air outlet of the machine should be clean to ensure the heat dissipation of the whole machine. After a period of use, check the wear degree of the carbon brush. If you need to replace the carbon brush, make sure that the new carbon brush can slide leisurely in the brush holder.
8, when using things, encounter blocking scene. For example, when drilling and cutting, the switch should be released in time to block the power supply to prevent the burning of the motor, switch and electrical circuit.
9. If the replacement does not match, it will cause the motor to burn.
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