Power tools ten size common sense
1. How does the motor cool down?
The fan on the armature rotates to draw in air from the outside through the vents. The rotating fan then cools the motor by passing air through the inner space of the motor.
2. Capacitors for noise suppression
When using power tools equipped with series motors, sparks will be generated in the commutator and carbon brushes of the motors, which will interfere with radios, television sets, medical instruments, etc., so it is necessary to assemble suppression capacitors and anti-current coils on power tools to play an anti-interference role.
3. How does the motor reverse?
Reverse rotation of the vast majority of power tools is achieved by reversing the current direction, by changing the electrical connection of the circuit, the direction can be reversed.
4. What is a carbon brush?
When the power tool works, the carbon brush acts as a bridge, connecting the inductance coil to the armature coil with an electric current.
5. What is an electronic brake?
Because of inertia， the armature will continue to rotate after the machine is turned off, and an electromagnetic field will remain in the stator. The armature and rotor then act as a generator，generating a torque. The direction of the torque is just the opposite of the direction of the rotating armature.
6. the influence of frequency on power tools
China is now supplied with 50Hz alternating current, but some countries use 60Hz alternating current, when 50Hz power tools use 60Hz current, or 60Hz power tools use 50Hz power supply, there is no impact on power tools (except air compressor).
7.pay attention to the daily maintenance of power tools, such as the outlet of the machine to keep clean，ensure the good heat dissipation of the machine, use for a period of time, to check the wear degree of the carbon brush. If you need to replace the brush, make sure the new brush can slide freely in the brush holder.
8. when using the tool， encountered the phenomenon of blocking. If drilling and cutting，the switch should be released in time to cut off the power supply， so as not to cause the motor， switch，electrical line burning.
9. When using metal shell tools，the machine should have a three-plug power cord with leakage protection， and a power socket with leakage protection must be used. Do not be splashed into the water during use，so as to avoid leakage accidents.
10.when replacing the motor of the machine， whether the rotor is bad or the stator is bad， it must be replaced with the matching technical parameters of the rotor or stator. If the replacement is not matched，it will cause the burning of the motor.
Post time: Apr-07-2021