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Speed control method of geared motor Aug 05, 2020

Speed control method of geared motor

Gear motor is a fixed speed reduction motor. Once the speed ratio is selected, the motor is selected, and the final output speed is fixed. However, in actual use, there are many occasions where the speed is required to change, such as the spindle speed of the lathe, the speed of the stirring shaft of various agitators, the speed of the conveyor when conveying different items, etc., how to adjust the speed is very concerned by engineers and technicians. topic of. The following is a brief description of various speed regulation methods used in engineering. [1]

1. Stepped speed regulation and pole-changing speed regulation is the simplest and most economical speed regulation method. However, it is only limited to the occasions of small and medium capacity (below 2kw) and few starts. Usually there are only two speeds, and the achievable speed regulation ratio is also small (l: 2 to 6), and the limit is three gears; in some specific industries, such as lathes, gearboxes with gears are often used. Stepped speed regulation. Although there are several speeds, the speed adjustment range is not large. [1]

2. Stepless speed regulation can be divided into mechanical and electrical. The common method of the former is to insert a mechanical stepless speed regulation device (mainly belt disc type and friction disc type) at the connection between the motor and the gear box. Its advantages are stable speed regulation, uncomplicated structure, and suitable for harsh environments; the disadvantage is that the speed regulation range is small (usually within 1:10). The basin belt and friction disc are consumable parts and require regular maintenance and replacement. The latter is cascade speed regulation of asynchronous motors, rotor resistance speed regulation, or voltage regulation and speed regulation of DC motors, etc.