What are the motors that are often used in hand held electric tools?
Most power tools are series excited motors with an electric brush inside. The motor has the characteristics of small size, high power and high speed. But it can not work for a long time, and some can be controlled by thyristor.
Considerations for hand held electric tools:Before the tool is used, the electrician shall check whether the wiring is correct and prevent the connection of the zero line and the phase line.Tools that are left unused or wetted for a long time should be checked by electrical engineer before use. Does the insulation resistance meet the requirements?.The soft cable or cord that comes with the tool can not be connected long, and when the power is away from the work place, it should be solved by mobile electric box.The original plug of the utility model can not be dismantled or changed at will, and the metal wire of the electric wire is directly inserted into the socket without using the plug.Found the tool case, handle broken, should stop using, replace.Non - professional personnel shall not disassemble or repair tools without authorization.The rotating parts of hand tools should be protected;Operators are required to wear insulation protection products;Leakage protector must be installed at the power supply.
Most power tools are series excited motors with an electric brush inside.The motor has the characteristics of small size, high power and high speed.But it can not work for a long time, and some can be controlled by thyristor.
