Brushless motor is a device that converts electrical energy into kinetic energy, it has many types, different types of motor damage to the phenomenon and reason of difference, but summarized up, is of two kinds of electrical and mechanical aspects.
a, bearing is broken, bearing temperature is exorbitant, cracks have appeared on raceway and rolling body and scars.
1, the lubricating oil is insufficient, aging or add more, lubricating oil should not exceed seventy percent of the bearing cover and the bearing capacity.
2, lubricating oil is punctuated with impurities such as iron powder, or the oil ring was stuck inside.
3, not installed in place, such as bearings, bearing cover of the seam allowance without assembly, or between too close too loose. Concentricity is not good, eccentric force cause damage.
4, the coupling level adjust, no transmission between the chain or belt is too tight, axial impact load deformation, etc.
5, not bearing quality, bearing gap is too small or too big.
6, motor start-stop frequency is too high, and rigidity is too big, should not be full pressure start for some situations, the soft can better.
2, selection of installation problem 1, between the motor and load level not adjust good, cause different heart and exist between the radial impact load and motor.
2, motor foot screws has no fixed good, or fixed shelf design is good.
3, without considering the load selection, some of the load are frequent start-stop, perhaps to calculate only need 1 kw of power, design considering the heat dissipation and the weak question, may need to use 3 kw.
4, the wrong line, such as the star of a triangular, and triangular to become a star, it may cause the motor overheating.
5, load requires some special braking, motor and no corresponding mechanical or electronic brake, may be too late to energy release when parking.
6, motor design some protective devices, such as overheating, overload, over temperature, lack of equal, which may occur in the process of using, but because the protection does not reach the designated position, the motor burned directly.
7, connection error, or positive upside down, or fine line selection, or terminal ear without good cause contact resistance is too large.
8, if the use of photoelectric encoder and so on, need to consider some dust protection, anti impact protection.
9, drive is broken cause instantaneous high voltage or high current burn out motor side.
10, power supply, no motor pressure into consideration, such as 220 volts, using the 380 v, and went in.
11, some stepper motor and servo motor, can't privately apart to replacement of bearing and so on, otherwise you may lose magnetic or encoder pole zero offset can't normal use.
3, the environment question 1, some occasions dust is more, if you use the brushless dc motor, there are no such thing as attention to install the fan device to unclog the dust, in time, lead to carbon brush and commutator wear in a short period of time.
2, high temperature occasion, such as more than 50 degrees for a long time, and the load is heavy, the selection of motor, no use F and H high temperature resistance of the motor, at the same time not separate air cooling system design, long running motor overheating.
3, environment humidity is too high, not in terms of electricity insulating do every detail, can cause electric leakage on the road.
4, vibration load, resonance to consider, when fixed motor, the direction of the screw to consider whether it will loose because of vibration direction difference.
4, 1, copper wire of the coil winding motor quality problem is unqualified, or turns around is not enough, or has such problems as each phase resistance is not the same.
2 article, squirrel cage rotor material don't pass, used in the process of fracture.
3, electrical insulation is bad, sometimes factory power grid voltage will be on the high side, voltage fluctuations, slightly cause insulation breakdown.
4, some of the permanent magnet motor, magnetic material is not high temperature resistant, use excitation-loss after a period of time.
no matter what, in the process of using the motor, as long as the vibration, noise, or with unusual smell, should stop check and make sure there are no problems rear can continue to use.
