How is difference from the appearance of brushless dc motor or brush dc motor? Small make up teach you several recruit:
a: look at the appearance, usually flat brushless dc motor (Small power also have round)Length is greater than the diameter, and brushless dc motor.
way 2: motor lead wire, brushless dc motor rotor on the don't need an external power supply, so there is no lead; And brushless dc motor is need and power, so there are two power cord, lead wire on the stator is don't see the difference.
3: view structure, open motor, dc brushless motor, saw the carbon brush is a brush dc motor, otherwise is a brushless dc motor.
pattern 4: check the nameplate, general manufacturers will be in the motor nameplate marking each parameter values, and brushless dc motor with a brush dc motor model is different, can be respectively from it. Such as rattan feet of brushless motor said BLD models beginning of letters, and brushless dc motor is DK have said.
in addition to the above a few from the appearance on the difference between the two ways, we can also through some actual operation to further confirm the difference. For example:
a: generating method of test, using pointer multimeter on dc motor power supply cord, multimeter to adjust to low voltage, yuntai motor, slowly turn the motor shaft with the hand, if the pointer still can speed up the rotation, the pointer is brushless dc motor, on the other hand is a brushless dc motor.
2: to observe the continuous working time, relative to a brush motor, brushless dc motor of the continuous working time will be longer, because of the brushless motor is not need to change the carbon brush,And brush motor carbon brush in use after a period of time will wear, need to change to normal use. So the two large difference in the continuous working time. But beware: the length of the continuous working time is not on behalf of the service life of the motor! Theory of continuous working time is long, life is not necessarily the motor long! Brushless motor and motor, it depends on the service life of motor internal main components of the weakest part of the normal use of time. For example, if the winding brushless motor manufacturing process quality, poor quality of materials, rough, so the first bad motor is a brushless motor, rather than a brush motor.
so, inductive brushless motor, in addition to knowing how to distinguish between brush, brushless dc motor is still have to know how to choose the high quality of the motor. High quality of the motor to ensure it has a longer service life
