Motor selection device

摘要

A motor selection device includes a computer including a storage device and a calculation device. The storage device stores data of acceleration time, constant speed time, deceleration time, stop time, maximum output torque for each motor, dynamic friction torque, and constant load torque. To select selectable motors and to suggest an optimal operation pattern among motor operation patterns, the calculation device includes a central processing unit (CPU) and performs effective torque calculation by calculating torque in the acceleration time, in the constant speed time, in the deceleration time, and in the stop time based on data stored in the storing unit, and calculating the effective torque by giving a first torque, a second torque, a third torque, a fourth torque, the acceleration time, the constant speed time, the deceleration time, and the stop time to a predetermined formula.

主权项

1. A motor selection device comprising:
a computer including a storage device and a calculation device in order to select a plurality of selectable motors and to suggest an optimal operation pattern among motor operation patterns, each of the motor operation patterns being prescribed by positioning time during which a motor output shaft of a motor rotates by a positioning angle to rotate a load, and stop time during which the motor output shaft is stopped, wherein the storage device is configured to store acceleration time during which the motor output shaft is accelerated in the positioning time, store constant speed time in which the motor output shaft is rotated at a constant speed in the positioning time, store deceleration time in which the motor output shaft is decelerated in the positioning time, store the stop time, and store maximum output torque for each motor which each of the motor can output, dynamic friction torque, and constant load torque by the load, and the calculation device includes a central processing unit (CPU) and is configured to perform effective torque calculation, the effective torque calculation including:
reading the maximum output torque, the dynamic friction torque, the constant load torque the acceleration time, the constant speed time, the deceleration time, and the stop time which are stored in the storage unit,calculating a first torque in the acceleration time which is a sum of the maximum output torque, the dynamic friction torque, and the constant load torque,calculating a second torque in the constant speed time which is a sum of the dynamic friction torque and the constant load torque,calculating a third torque in the deceleration time which is the sum of the maximum output torque, the dynamic friction torque, and the constant load torque by the load,calculating a fourth torque in the stop time with the constant load torque, andcalculating the effective torque by giving the first torque, the second torque, the third torque, the fourth torque, the acceleration time, the constant speed time, the deceleration time, and the stop time to following formula (1), where Te is the effective torque, ta is the acceleration time, tc is the constant speed time, td is the deceleration time, tb is the stop time, Ta is the first torque, tc is the second torque, td is the third torque, tb is the fourth torque, and tp is a cycle period and a sum of ta, tc, td, and tb.Te=ta·Ta2+tc·Tc2+td·Td2+tb·Tb2tp.(1)