Servo motor selection

Servo motor selection calculation method:
　　 1. Confirmation of speed and encoder resolution.
　　 2. Conversion of load torque on the motor shaft and calculation of acceleration and deceleration torque.
　　 3. Calculate the load inertia and match the inertia. Take Yaskawa servo motors as an example. The inertia of some products can be matched up to 50 times, but the smaller the actual, the better, so the accuracy and response speed are better.
　　 Fourth, the calculation and selection of regenerative resistance, for servo, generally above 2kw, external configuration is required.
　　 Five, cable selection, the encoder cable is twisted-pair shielded. For the Japanese products such as Yaskawa Servo, the absolute value encoder is 6 cores, and the incremental type is 4 cores.

The above selection method only considers the power of the motor. For linear motion, it is expressed by speed, acceleration and required external force. For rotary motion, it is expressed by angular velocity, angular acceleration and required torque. They can all be expressed as a function of time. The factor has nothing to do. obviously. The maximum power of the motor P motor should be greater than the peak power P peak required by the working load, but this is not enough. Power in the physical sense includes torque and speed, but they are limited in the actual transmission mechanism. of. Use peak value and T peak value to indicate the maximum value or peak value. The maximum speed of the motor determines the upper limit of the deceleration ratio of the reducer, n upper limit = peak, maximum/peak. Similarly, the maximum torque of the motor determines the lower limit of the reduction ratio, n lower limit = T peak/T motor, maximum, if the lower limit of n is greater than The upper limit of n, the selected motor is inappropriate.