See the motor nameplate and manual aluminium electricity opportunities than copper motor model on a & quot; L'Perhaps & other; A“Letters, and the same level of weight lighter than copper, aluminium coil motor with volume will be bigger. If is fake, you see the appearance may not know, can tear open motor wire core color is different, brushless motor, pay attention to and copper clad aluminum oh, so cut line, if there is a white is aluminum. If you can open it, it will has nothing to do in the local line to see, after watching the reoccupy after high temperature adhesive glue is good. If can't open it, according to the coil resistance, the aluminum core is bigger than the resistance of the copper core.
how to judge the brushless motor is copper aluminum core is still?
1 conductive function is better than aluminum, copper, copper wire carrying capacity is 6 amps per square, aluminium wire 5 amp, so long-term work simple fever, aluminium wire motor general shell temperature kept at 90 degrees, of course, the problem is not big, all the function is better than copper wire motor, you get what you pay for. Power is much smaller than that of copper, aluminum core motor load flow small so simple fever. General aluminium wire is about twenty percent less than its copper wire.
2, pure copper wire motor by using more of course. Aluminum bigger than copper resistance, high calorific value in use, simple motor burn out. And aluminum, and copper is not natural fusion welding, the power cord connection point and simple formation damage, so general aluminium wire motor pump's whole life is far lower than the pure copper wire motor pump life.
3, pure copper wire motor more save electricity. The resistance of the circuit components intrusive contact with fever intrusive proportional, big fever will resistance.
4, pure copper motor noise is smaller. When the average increase 3 db, noise energy will increase. Aluminium wire motor noise than copper wire high about 7 db, so aluminium wire motor noise is two times more than copper wire motor noise. Pure copper wire motor pump machine noise is only 58 db after test.
5, relatively more by the use of pure copper wire motor. In use process, because of the large aluminum than copper resistance high calorific value, simple motor burn out.
6, for example, oscillating electrical resistivity of copper is 0. 017, and the oscillation electrical resistivity of aluminum wire is 0. 028. Exchange copper wire of copper aluminum wire cross section ratio of 0. 79:1, 6 square copper equivalent to about 10 square meters of aluminium wire, using aluminium wire diameter would be thicker than copper wire, the same stator slot aluminium wire tend to not put, per unit area by electric discharge is different also, copper wire is about to after 5 - every square millimeter8, current, power motor, aluminium wire is less.
7, aluminium wire quality will be lighter, they're relatively cheap many, but the mechanical strength is poorer, aluminium wire feeder line again the local simple oxidation, feeder terminal will form the temperature after oxidation, causing poor contact, forming defect is frequent power or break points, other aluminium wire not simple welding, small strength and low melting point, easy oxidation, high formation temperature and big loss.
