Numerical control device provided with heat radiation characteristic estimation part
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United States of America Patent
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Aug 7, 2018
Grant Date -
Sep 3, 2015
app pub date -
Mar 2, 2015
filing date -
Mar 3, 2014
priority date (Note) -
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Abstract
A numerical control device, in a motor drive system which drives a motor part which has a cooling fan motor and is provided with the numerical control device to drive the motor part, which acquires the temperature of the component elements of the motor part from the temperature detectors, ambient temperature, input energy to the component elements, and output energy from the component elements, estimates the heat radiation characteristic of the component elements from the data of the temperature of the component elements, ambient temperature, and input/output energy, compares the estimated value of the heat radiation characteristic of the component elements with a normal value, judges that the cooling fan motor is abnormal when the heat radiation characteristic is below the normal value, and thereby prevents trouble due to overheating of the component elements of the motor part.
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