It is well known that the servo motor is an indispensable part of the industrial automation industry. And a variety of servo motors on the market, how to choose a suitable servo motor, it is necessary to understand such products. Today, I talk about DC servo motor, so that more people understand how to better choose their own products.
DC servo motor type (such as Leadshine servo series)
DC servo motors are divided into brushless DC servo motors and brushless DC servo motors.
Brushed DC servo motor: low cost motor, simple structure, large starting torque, wide speed range, easy control, need maintenance, but easy maintenance (for carbon brush), will produce electromagnetic interference, environmental requirements. So it can be used for cost-sensitive general industrial and civil applications.
Brushless DC servo motor: motor small size, light weight, output, fast response, high speed, inertia, smooth rotation, torque stability. Easy to implement intelligent, the electronic commutation mode is flexible, can be square-wave or sine wave commutation. Maintenance-free brushless motor loss of the situation, high efficiency, low operating temperature, low noise, electromagnetic radiation is very small, long life, can be used for a variety of environments.
Common servo motor brand
Currently on the market there are about 200 servo motor brand. The mainstream servo motor brand:Leadshine Delta Panusonic LiChuan Yaskawa XINJE Mitsubishi Kinco Yaskawa XINJE Mitsubishi Kinco FUJI JMC and so on.
Selection of servo motor
1 Calculate the matching of load inertia and inertia.
2 Calculation of Load Torque on Motor Shaft and Calculation of Acceleration and Deceleration Torque.
3 Speed and encoder resolution.
4 Cable selection
5 Regeneration resistor calculation and selection, for the servo, generally more than 2kw, to external configuration.
Note: The angular velocity (t), angular acceleration (t), and required torque (t) for the rotary motion are expressed as the velocity v (t), the acceleration a (t) and the required external force F (t) T (t), they can be expressed as a function of time, independent of other factors. obviously. The maximum motor power, P, should be greater than the peak power P peak required for the workload, but that is not sufficient. The physical power includes both torque and speed, but in actual drives they are limited of. Peak or T peak is used to represent the maximum value or the peak value. The maximum speed of the motor determines the upper limit of the gear reduction ratio, n upper limit = peak value, the maximum / peak value. Similarly, the maximum torque of the motor determines the lower limit of the reduction ratio, n lower limit = T peak / T motor, N upper limit, the selected motor is not suitable. Conversely, a wide range of ratios between the upper and lower limits can be determined by a wide range of analogies for each type of motor. The principle of using only the peak power as the selection motor is not sufficient and the exact calculation of the transmission ratio is very cumbersome.