? ? ? ? The magnetic watt is mainly used in permanent magnet DC motor, and the electromagnetic motor produces the magnetic potential source through the waste magnetic treatment. The permanent magnet motor produces permanent magnetic potential source with permanent magnet material. Permanent magnet (magneto) instead of electric excitation has many advantages, such as simple structure, easy maintenance, light weight, small size, reliable use, low copper consumption, low copper consumption and low energy consumption.
Influence of different modes on magnetizing of magnetic tile:
1, the first magnetizing way is 10% lower than the surface magnetization of second, third kinds of magnetizing methods. Generally speaking, it is more reasonable to adopt second kinds of magnetization methods;
2, the first way magnetizing is very convenient, and some electric car motor magnetic tile factory adopts spiral tunnel type magnetizing, the production efficiency is very high;
3, second ways of magnetization, some factories use external impact, and some use internal impact, magnetic tile or magnetic ring needs to stick first, drying, production is also very convenient;
4, third ways of magnetizing, there are many small motors (mostly three slot), in this way, when it is installed in the rotor, because there is no magnetic force is very good assembly, but it is not convenient to check whether the magnetic charge.
5, the first magnetizing mode belongs to open magnetization, because when magnetizing without external magnetic circuit, did not form a closed loop magnetic tile is not easy to fully saturated magnetizing effect, the magnetic flux density of magnetic tile, generally higher than the low number of closed magnetizing will;
6, second kinds of magnetizing method is the most commonly used, is closed after magnetizing magnetization, magnetic flux density is the highest, but also through the charging head shape to adjust the air gap flux density waveform, to meet the different requirements of motor performance, but when assembling the motor, need to use special tooling for assembly, otherwise may be due to magnetic force causes the rotor or the injured magnetic tile magnetic particle;
7, third kinds of magnetizing method also belongs to the closed magnetization (because the rotor punching is good magnetic material), attention between the magnetized magnetic tile magnetic flux density size generally between the first and second in the use of the magnetization, the best carbon brush and the rotor winding in the open state, or in the carbon brush and the commutator contact the surface may produce a spark phenomenon.
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