when some friends with a brush motor often encounter this problem, that is to use the machine after a period of time, need to open the motor to clean up the carbon brush, time-consuming, laborious maintenance strength as a household cleaning.
2, fever, short life
because has a structure of brush motor, brush and commutator of the contact resistance is very big, a motor as a whole is bigger, resistance to heat, and permanent magnet is a thermal sensor, if temperature is too high, will be demagnetization magnetic steel, the motor performance degradation, affect the service life of a brush motor.
3, the efficiency is low, the output power of small
the above said to have a brush motor heating problems, largely because the current work on the internal resistance of the motor, so electricity have much transformed to heat energy, so there are motor output power is not big, the efficiency is not high also.
2, brushless motor's advantages:
1, brushless, low interference
in addition to the brushless motor brush, the most immediate change is without the motor running when the electric spark, thus greatly reduce the electric spark interference of remote radio equipment.
2, low noise, smooth operation,
brushless motor without brush, less friction force during operation, smooth operation, low noise will be many, the advantages of model running stability is a huge support.
3, long life, low maintenance cost
little brush, brushless motor wear is mainly on the bearing, and from the mechanical point of view, brushless motor is almost a maintenance-free motor, when necessary, the only need to do some cleaning maintenance.
the up and down, just know brushless motor relative to have advantage in where the brush motor, but everything is not absolute, a brush motor torque at low speed performance, large torque and other performance characteristics of brushless motor is irreplaceable, but in the context of use and ease of brushless motor, with the decline in the cost of brushless controller and brushless technology development and market competition both at home and abroad, the development and popularity of power system is high speed brushless stage, which greatly promoted the development of the domestic brushless motor. brushless motor
