The power is between 100w and 150W, dc motor is good, or ac motor is good, why?
Dc motor torque, speed adjustment is convenient, but the large amount of maintenance, need to communicate direct current motor torque is small, relatively speed inconvenience, but along with frequency inverter speed control, maintenance of small, easy to use
Want to see in what way For example, if used in industrial and ac electrode to work long hours If in the low voltage dc power system also excellent dc brush dc motor rotor commutator (commonly known as commutator) and the rotation of the brush contact friction happens will send edm fever It would also make the noise As a result of this structure makes the short service life of motor efficiency low ac motor did not brush the structure of the ac motor and induction motor is established by induction of rotor rotating magnetic field The rotor is two fixed bearing support greatly reduced the friction loss Therefore, ac motor has a long service life The characteristics of the low noise high efficiency and widely used inductive dc motor Low voltage dc motor does not rely on a fixed dc power mode change is convenient Is manageable - reverse faults low working efficiency Short service life of the big noise Not for a long time continuous use ac electrode advantages of high efficiency Can be used for a long time continuous working noise is small The service life is long Drawbacks fixed speed depends on the ac power to have the capacitor or starter and a motor is the speed of the ac dc can be very high Such as small electrical hand electric drill motor in the soybean milk machine big machinery nc machine tools in this machine also has a brush work with a loud
On the practical, the alternating current opportunity is more practical, the use maintenance of dc motor is more troublesome!
