How to adjust the speed of a gear reduction motor？

Abstract: The speed regulation of a reduction motor refers to changing the power supply voltage of a DC motor to adjust the speed. Generally, a built-in drive reduction motor cannot adjust the speed. Whether the external drive can adjust the speed depends on the structure of the driver. The reducer and motor of the gear reduction motor are connected by gears, and generally the speed can be adjusted. The speed regulation methods include stepped speed regulation and stepless speed regulation. Among them, stepless speed regulation can be divided into mechanical and electrical types. Let's learn about how to adjust the speed of a gear reduction motor. 1. Can the reduction motor be adjusted?
The reduction motor includes a motor and a reducer. The motor is used for transmission. After the power is turned on, the motor runs. The reducer and the motor are connected by gears, which can be used to change the speed of the motor. The gear meshing ratio is the speed ratio between the motor and the reducer, so the motor can change the running speed of the motor through the reducer.
However, the speed change here is not speed regulation, but deceleration. The deceleration and speed regulation of the gear reduction motor are two different things. Speed ​​regulation refers to changing the supply voltage of the DC motor to achieve the purpose of adjusting the speed, while deceleration refers to installing a reducer with a certain speed ratio on the output shaft of the DC motor to achieve deceleration.
Generally speaking, there are two types of reducer motor drivers: internal and external. Most internal drive motors cannot adjust the speed. Whether the external drive can adjust the speed depends on the structure of the driver.
2. How to adjust the speed of a gear reducer motor
The gear reducer motor is a fixed speed reducer motor. Once the speed ratio is selected and the motor is selected, the final output speed is fixed. However, in actual use, there are many occasions that require speed changes and need to adjust the speed. There are two speed regulation methods for gear reducer motors:
1. Stepped speed regulation
Pole-changing speed regulation is the simplest and most economical speed regulation method, but it is limited to small and medium capacities (below 2 kilowatts) and occasions with few starts, and usually only has two speeds, and the speed ratio that can be achieved is also small (1:2-6), and the limit is three gears. In some specific industries, such as lathes, gearboxes with gears are often used for step-by-step speed regulation. Although there are two speeds, the speed regulation range is not large.
2. Stepless speed regulation
Stepless speed regulation methods can be divided into mechanical and electrical types. The common mechanical method is to insert a mechanical stepless speed regulation device (mainly belt pulley type and friction disk type) at the connection between the motor and the gearbox. Its advantages are stable speed regulation, simple structure, and suitable for harsh environments. The disadvantages are small speed regulation range (generally within 1:10), and belt pulleys and friction disks are consumable parts that require regular maintenance and replacement.
The electrical type is to perform cascade speed regulation on asynchronous motors, rotor resistance speed regulation, or voltage regulation on DC motors.
When the speed of the reduction motor needs to be adjusted, the appropriate speed regulation method can be selected according to the needs of adjustment and the occasion of use.