531X305NTBANG1 电源连接卡GE

531X305NTBANG1 电源连接卡GE一般都要先烘软绕组再拆线。但较大容量的电机，烘软和拆线都较困难，故可采用下述方法拆除旧绕组：用一把扁铲，将绕组的一端铲除，切口与槽口齐平。绕组的另一端用铁皮剪刀剪开，然后用一根粗细适合的铜棒将槽中的漆包线冲出，最后清槽。如果铜棒合适，操作方法正确，每槽中的导线可一起冲出。在使用扁铲时，要小心谨慎，切勿铲坏定子铁心用上述方法拆线时，可省去拆前的烘软工序，节省时间，节约电能，且拆起来比较省力。
531X305NTBANG1 电源连接卡GE但这种方法适用于容量为7.5KW以下的电动机，因小电机或微电机的机壳小，使用扁铲不便操作。直流电机或者转子是绕线式电机更新电刷，当刷握与换向器表面垂直时，研磨电刷的方法是：在换向器的表面上铺一张砂纸，手握相同型号的新电刷沿换向器轴向往复摩擦，电刷的被磨面很快会被磨出与换向器表面相吻合的弧面来。先用较粗的砂纸，后用细砂纸。

531X305NTBANG1

531X305NTBANG1 电源连接卡GE研磨时，手握电刷要正，来回运动都要沿换向器的轴线方向，不能偏斜，往复行程不要太长。要注意防止电刷粉进入电枢及换向器沟槽内。磨好后，将电刷装入刷握，起动电机空载运行几分钟后，取出各电刷检查，接触面一般要占总面积的80%以上才行，否则，要重新研磨直到合格为止。当电机的刷握与换向器表面不垂直时，宜采用下述方法：将砂纸铺在平面上，手握电刷按刷握的倾斜角度磨出一个斜面。然后将电刷装进刷握，用手转动电机转子，这样就会在电刷的斜面上磨出光亮点，然后用砂纸打磨光亮点（也可用刀子刮）。
531X305NTBANG1 电源连接卡GE打磨后，再将电刷装进刷握，用手转动电机转子，同样又会被磨出亮斑，面积比第一次大。如此进行几次，电刷的接触面会愈来愈大，逐渐形成弧形。打磨亮斑时，每次不要打磨得太多，特别是到最后一次，一定要小心，只要用细砂纸稍微擦一下即可。如擦多了，接触面反而会变小。经实践证明用这种方法研磨倾斜的电刷，时间快，效果好。步进电机转矩与转速的曲线关系从上图可以看到，步进电机在低速段转矩稳定(变化量不大)；当转速大于约750rpm时，转矩急速下降。由此，在使用步进电机控制时，不应进行过高转速的运行使用。若使用过程中，将转速设计过高，则可能会因为电机转速的下降而出现电机抖动的现象。

531X305NTBANG1

531X305NTBANG1 power connection card GE generally must first dry the winding and then remove the wire. However, the larger capacity of the motor, drying and dismantling are more difficult, so the following method can be used to remove the old winding: with a flat shovel, one end of the winding is removed, and the incision is flush with the notch. The other end of the winding is cut with iron shears, and then a copper rod of suitable thickness is used to flush out the enameled wire in the groove, and finally the groove is cleaned. If the copper rod is suitable and the operation method is correct, the wires in each slot can be flushed out together. In the use of flat shovel, be careful, do not shovel the stator core with the above method when dismantling, can save the drying process before dismantling, save time, save energy, and more labor.
531X305NTBANG1 Power connection card GE However, this method is suitable for motors with a capacity of less than 7.5KW, because the small motor or micromotor housing is small, the use of flat shovel is inconvenient to operate. The DC motor or rotor is a winding motor to update the brush, when the brush grip is perpendicular to the commutator surface, the method of grinding the brush is: lay a piece of sandpaper on the surface of the commutator, hold the same type of new brush along the commutator axial friction, the grinding surface of the brush will soon be ground out of the commutator surface of the arc to match. Use coarse sandpaper first, then fine sandpaper.
531X305NTBANG1 power connection card GE grinding, the hand brush should be positive, the back and forth movement should be along the axis of the commutator, can not be deflected, and the reciprocating stroke should not be too long. Care should be taken to prevent brush powder from entering the armature and commutator groove. After grinding, the brush is loaded into the brush grip, the starting motor runs for a few minutes without load, take out the brush check, the contact surface generally accounts for more than 80% of the total area, otherwise, to re-grind until qualified. When the brush grip of the motor is not perpendicular to the surface of the commutator, the following method should be used: Lay the sandpaper on the plane, and grind a bevel according to the tilt Angle of the brush grip. Then put the brush into the brush holder, turn the motor rotor by hand, so that it will grind out bright points on the bevel of the brush, and then polish the bright points with sandpaper (you can also scrape with a knife).
531X305NTBANG1 power connection card GE after grinding, and then put the brush into the brush grip, rotate the motor rotor by hand, the same will be ground out bright spots, the area is larger than the first time. This is done several times, the contact surface of the brush will become larger and larger, and gradually form an arc. When polishing bright spots, do not polish too much at a time, especially to the last time, be careful, just use fine sandpaper to rub it a little. If you wipe more, the contact surface will become smaller. It has been proved by practice that the grinding of inclined brush with this method has fast time and good effect. The curve relationship between stepper motor torque and speed can be seen from the figure above, the stepper motor torque at low speed is stable (little change); When the speed is greater than about 750rpm, the torque decreases rapidly. Therefore, when using the stepper motor control, the operation of too high speed should not be used. If the speed is designed too high during use, it may cause motor jitter due to the decrease in motor speed.