| 摘要 |
<P>PROBLEM TO BE SOLVED: To inexpensively perform prediction without directly detecting a temperature rise at a reducer part in a servomotor-driven reducer by a temperature detector, and without increasing the number of components. <P>SOLUTION: A current value Ii fed back to a servo amplifier for driving a servomotor 5 of the servomotor-driven reducer 20 and to a control device, and a rotational angle θm are read, and a calorific value of the reducer part 7 is calculated from the current value and the rotational angle, thus predicting a temperature rise. An arithmetic expression for uniquely obtaining a temperature rise value from an input torque Ti and an input rotational speed N at the reducer part, or a data table is predetermined, and the temperature rise is predicted with an output torque conversion value of the current value as the input torque and with a rotational speed obtained by converting the rotational angle as the input rotational speed. Further, the temperature rise at the reducer part is predicted with the input torque as an average input torque per cycle, and with a rotational speed as an average rotational speed per cycle. <P>COPYRIGHT: (C)2011,JPO&INPIT |
