The motor drives the spindle to rotate through the reducer.
To design such a mechanism, is it necessary to determine the spindle speed to select the type of motor, How does an electric motor work physics? or to select a type of motor first, and then determine the spindle speed through the design of reducer?

How does an electric motor work physics?
It seems that the spindle speed must be determined first, right?
So how to choose the motor? It's urgent.
First of all, you need to determine how much speed your spindle needs, and know how much torque you need at this speed. According to the required torque, choose the appropriate power motor, and choose the reducer according to the spindle speed and torque. How does an electric motor work physics? If a speed-adjustable reducer is selected, the power of the motor should be greater than the power required at the maximum speed of the reducer.
Reducer is to change the speed of motor into the speed you need. How does an electric motor work physics? If you want to stop immediately, you can use worm gear reducer (with self-locking function). Or brake motor can stop immediately.
Selection and calculation of motor and reducer for mechanical transmission design
My graduation project is engine cold grinding test-bed, which belongs to mechanical transmission. Motors drive the reducer to drive the engine to rotate, requiring 600 revolutions. The required torque is because the parts of the engine after overhaul can not be directly transferred to the car with 24.9n.m times 5 times, which is also the purpose of this design. Thank you. How does an electric motor work physics? Master, thank you so much.

How does an electric motor work physics?
1. Output power P=T*n/9550=24.9*5*600/9550=7.82 kw. Considering power loss, choose 8 kW motor with synchronous speed of 1500 rpm.
I checked that there are two types of motors for you to choose: Y132M1-4 (7.5kw, 1500 rpm) and Y160M1-4 (11kw, 1500 rpm).
The output power is only 8 kw. It's a little wasteful to use 11 kw motor. 7.5 kW should be OK, because the five times of your output torque is only a rough value.
After choosing the motor, the reducer is designed: transmission ratio i = 1460/600 = 2.43, with a first-order spur gear reducer. Material pinion 20Cr carburizing, big gear 45 conditioning. Gear basic parameters (for reference): M = 3, Z1 = 21, z = 51.
The transmission ratio can also be calculated directly by synchronous speed 1500 revolution, I = 1500/600 = 2.5. Similarly, it is driven by a first-order spur gear, carburized by 20Cr pinion and conditioned by 45 large gears. How does an electric motor work physics? Gear basic parameters (for reference): M = 3, Z1 = 21, z = 53. Velocity error is 0.95%, within 5%.

The motor drives the spindle to rotate through the reducer.
To design such a mechanism, is it necessary to determine the spindle speed to select the type of motor, or to select a type of motor first, and then determine the spindle speed through the design of reducer?
It seems that the spindle speed must be determined first, right?
So how to choose the motor? It's urgent.

How does an electric motor work physics?
First of all, you need to determine how much speed your spindle needs, and know how much torque you need at this speed. According to the required torque, choose the appropriate power motor, and choose the reducer according to the spindle speed and torque. How does an electric motor work physics? If a speed-adjustable reducer is selected, the power of the motor should be greater than the power required at the maximum speed of the reducer.
Reducer is to change the speed of motor into the speed you need. If you want to stop immediately, you can use worm gear reducer (with self-locking function). Or brake motor can stop immediately.
Selection and calculation of motor and reducer for mechanical transmission design
My graduation project is engine cold grinding test-bed, which belongs to mechanical transmission. Motors drive the reducer to drive the engine to rotate, requiring 600 revolutions. The required torque is because the parts of the engine after overhaul can not be directly transferred to the car with 24.9n.m times 5 times, which is also the purpose of this design. Thank you. How does an electric motor work physics? Master, thank you so much.
1. Output power P=T*n/9550=24.9*5*600/9550=7.82 kw. Considering power loss, choose 8 kW motor with synchronous speed of 1500 rpm.
I checked that there are two types of motors for you to choose: Y132M1-4 (7.5kw, 1500 rpm) and Y160M1-4 (11kw, 1500 rpm).
The output power is only 8 kw. How does an electric motor work physics?  It's a little wasteful to use 11 kw motor. 7.5 kW should be OK, because the five times of your output torque is only a rough value.

How does an electric motor work physics?
After choosing the motor, the reducer is designed: transmission ratio i = 1460/600 = 2.43, with a first-order spur gear reducer. Material pinion 20Cr carburizing, big gear 45 conditioning. How does an electric motor work physics? Gear basic parameters (for reference): M = 3, Z1 = 21, z = 51.
The transmission ratio can also be calculated directly by synchronous speed 1500 revolution, I = 1500/600 = 2.5. Similarly, it is driven by a first-order spur gear, carburized by 20Cr pinion and conditioned by 45 large gears. How does an electric motor work physics? Gear basic parameters (for reference): M = 3, Z1 = 21, z = 53. Velocity error is 0.95%, within 5%.

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