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电动汽车电机好比电动车的“心”,同样一组48V 20AH 铅酸电池,品质好效率高的电机可以跑45-55公里,因此选购电动车时一定要注意选择高品质配件。那么如何才能分辨电动车电机的优劣呢?
由于电机是密封的,若从根本上判断它的好坏,需要借助一定的外部工具,比如万字表。除了借助专业工具外,您也可以从外观材料及一般性能上进行判断。上述方法都可以简单的可以归结为:一看二听三摸四检测。
一看:看外壳。外层电镀工作做的好的电机一般外观比较光亮,翻新机呈灰色且比较暗淡。再可以看电机商标,一般比较大的厂家看重品牌发展都会标有,这是一种品牌品质的体现。最后可以看电机是否有3C认证,符合行业规范的电机也会更有保障。
二摸:摸温度。待电机停止后消费者可以用手去感知电机的温度,温度越低,电机散热性越好,性能也越好。
三听:听动力。在试车时,消费者可以载重起动时动力是否充沛,动力不充沛的很可能在电机线圈上偷工减料了。
四检测:检测电阻。1、检测交流三相电机的好坏摇表,500V的摇表即可,摇三个接线柱上的线对电机外壳的绝缘阻值,在0.5M欧以上就说明没有对地短路。2、万用表测:测A/B/C三相间的阻值,是否相等。数值差的越大,电机性能越差。并且电机功率越大,阻值越小!但是不能三相都为0欧,除非如50KW以上特别大的电机,但这个目前电动车应用可以说没有。
英文版:
Electric car motor is like the heart of electric car, the same group of 48V 20AH lead-acid batteries, high quality and efficient motor can run 45-55 kilometers, so when buying electric car must pay attention to choose high-quality accessories. Then how can we distinguish the advantages and disadvantages of the electric motor?
Because the motor is sealed, if the fundamental judgment of its good or bad, need to rely on certain external tools, such as the ten thousand words table. In addition to professional tools, you can also judge from appearance materials and general performance. The above methods can be simply summed up as follows: one look at two listens, three touches and four tests.
One look: look at the shell. The electroplating of the outer layer is good. The appearance of the motor is generally bright, and the retreading machine is grey and dim. Then you can see the motor trademark, generally a larger manufacturer value brand development will be marked, this is a manifestation of brand quality. Finally, we can see whether the motor has 3C certification, and the motor conforming to the industry standard will be more secure.
Two touch: touch the temperature. When the motor stops, consumers can feel the temperature of the motor by hand. The lower the temperature, the better the heat dissipation and performance of the motor.
Three listen: listen to the power. In the test run, consumers can start when the load is full of power, not enough power is likely to jerry-built on the motor coil.
Four test: detect resistance. 1. Inspect the quality of AC three-phase motor shake meter, 500V shake meter can be, shake the three terminals on the insulation resistance of the motor shell, in 0.5M Euro above that there is no short circuit to the ground. 2, multimeter test: measure the resistance between A/B/C three phases, whether they are equal. The greater the numerical difference, the worse the motor performance. And the greater the motor power, the smaller the resistance! But not all three-phase are 0 Euro, unless such as the 50KW above the particularly large motor, but this current application of electric vehicles can not be said to have.
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