Application of planetary gearboxes on electric locomotives. What is the function of the motor must be combined with the reducer?
Application of planetary gearboxes on electric locomotives
Now new energy is widely used, for new energy electric vehicles motor is the main source of power, because the volume, weight, cost of the motor is proportional to the torque of the motor, so the current development trend is to increase the form of reducer or transmission to increase the assembly speed ratio, reduce the motor torque, motor high speed, by increasing the motor speed to ensure that the power does not change the volume, weight and cost of the motor.
What is the function of the motor must be combined with the reducer
Planetary gearboxes have the following application areas in electric vehicles:
The use of planetary gearbox can reduce the speed and increase the torque to meet the working needs. It has the advantages of compact structure, high efficiency, accurate and reliable motion transmission, convenient use and maintenance, mass production, and wide application.
If the electric vehicle does not have a planetary gearbox, the output torque to the wheels is too small, especially when crawling requires a large torque, it is difficult to meet the requirements. And in daily use, if you choose a motor with a large torque, the price will be high, and the cost performance of the car will be higher.
The design scheme of the geared motor can reduce the overall structural weight of the data-driven control system and the cost of the manufacturing enterprise, and the overall economic weight of the scheme with the reducer is lighter than the overall weight of the scheme without the reducer, thereby reducing the production cost.
The use of planetary reducer not only provides the advantages of high cost performance, wide application, economic and practical, long life, etc., but also in the application of servo control, it has played a good servo rigidity effect, accurate positioning control, and has the characteristics of medium and low backlash, high efficiency, high input speed, high input torque, smooth operation, low noise and so on on the operating platform.
What is the function of the motor must be combined with the reducer?
The main functions of the reducer are:
1. Increase the output torque at the same time as the speed reduction, and the torque output ratio is according to the motor output multiplied by the reduction ratio, but special attention should be paid not to exceed the rated torque of the reducer.
2. The speed reduction reduces the inertia of the load at the same time.
The reducer, in fact, is a power transmission mechanism, itself does not form power, its effect is to use gear size difference and speed converter, the number of motor rotation to its own desired number of rotation, and obtain a relatively large torque mechanism.
Isn’t it okay to adjust the speed of the motor?
However, it is not, the motor is directly connected to the equipment, when the equipment is running, the load of the motor is particularly large, so the damage to the motor is also very large, and through the reducer is different, such as the reduction ratio of 100 reducer, the number of revolutions ratio of the reducer = input revolutions / output revolutions, if the rotation ratio is 100, the output torque is about 100 times the input torque. (The speed slows down and the torque increases) the load on the motor is only one percent when the machine is running. Moreover, if the reducer is broken, only the lower gear needs to be replaced, and the cost is much lower than that of the motor.
Application of planetary gearboxes on electric locomotives
The reducer is also a speed changer, but usually the speed changer is used to reduce speed, habitually called the reducer; The usual reducer is fixed transmission ratio, which is also adjustable, but it is usually graded adjustment.
It is easy to think that the vehicle has an adjustable reducer, so the vehicle has many gears, the gasoline engine (diesel engine) is the same as the motor, the speed of adding and reducing the throttle can be changed, but the scope of change is not large.
The reducer is a relatively precise machine, and the purpose of using it is to reduce the speed and increase the torque. It has a wide variety of types, different models, and different types of different uses. According to the transmission type, it can be divided into gear reducer, worm gear reducer and planetary gear reducer; According to the difference in the number of transmission stages, it can be divided into single-stage and multi-stage reducers.
In the current mechanism used to transmit power and motion, the application range of reducers is quite extensive. Its application from the transmission of large power, to small load, accurate angle transmission can see the use of the reducer, and in industrial application, the reducer has the function of reducing speed and increasing torque.
