Micro DC planetary gear motors are divided into brushed planetary gear motors, namely carbon brush gear motors and brushless planetary gear motors.
The brushed DC planetary gear motor is driven by carbon brushes and has a limited service life. When the carbon brush is used up, the service life will end. Generally, the life of brushed geared motors on the market is about 1000H, of course, some only have a few hundred hours.
Brushless DC planetary gear motors have longer life than carbon brush motors and are not controlled by carbon brushes. The service life is at least 3000H. Brushless geared motors have a long life, low noise, and large torque, so the price is higher, and the price of brushed geared motors is higher, or even twice as high.
The characteristics of the miniature DC planetary gear motor: Compared with the ordinary physical gear box of the same kind, it has the characteristics of smooth transmission, large carrying capacity, large transmission ratio in a small space, and long life. Small size and beautiful appearance.
Planetary gearbox is an important part widely used in mechanical transmission. When a pair of gears mesh, due to the inevitability of tooth pitch and tooth profile errors, meshing shock will occur during operation, which corresponds to the gear meshing frequency. Noise, due to the relative sliding between the tooth surfaces will also produce friction noise. Since gears are the basic components of gearbox transmission, reducing gear noise is necessary to control gearbox noise. Generally speaking, the main reasons for gear system noise are as follows:
1. Gear design. Improper parameter selection, too small overlap, improper or improper trimming of tooth profile, unreasonable gear box structure, etc. The surface roughness is too large.
2. Gear train and gear box. Eccentric assembly, low contact accuracy, poor shaft parallelism, insufficient shaft, bearing, and support rigidity, low bearing rotation accuracy, and improper clearance.
3. Other input torques. The fluctuation of load torque, the torsional vibration of the shaft system, the balance of the motor and other transmission pairs, etc.
Miniature DC planetary gear motors are widely used in office automation, smart home, production automation, medical equipment, financial machinery, game consoles and other fields, such as hollow blinds, smart toilets, automatic drying racks, power tools, automatic window machines, automatic curtains, and glass Curtain walls, bank ATM machines, automatic money counters, automatic money vending machines, etc.
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