CONTROL DEVICE FOR MACHINE TOOL WITH TIME ESTIMATION UNIT FOR ESTIMATING TIME UNTIL MOTOR REACHES OVERHEAT TEMPERATURE
First Claim
1. A control device for a machine tool including a motor for driving a spindle, the control device comprising:
- a current detection unit that detects a current driving the motor;
a storage unit that stores overheat temperature specified for the motor;
a temperature detection unit that detects temperature of the motor;
a time estimation unit that estimates, by using the temperature detected by the temperature detection unit and the overheat temperature, time from when present estimation takes place until the motor reaches the overheat temperature, under a condition in which the current detected by the current detection unit continuously passes through the motor; and
a provision unit that provides the time estimated by the time estimation unit.
1 Assignment
0 Petitions
Accused Products
Abstract
A control device for a machine tool including a motor for driving a spindle includes: a current detection unit that detects a current driving the motor; a storage unit that stores overheat temperature specified for the motor; a temperature detection unit that detects temperature of the motor; a time estimation unit that estimates, by using the temperature detected by the temperature detection unit and the overheat temperature, time from when present estimation takes place until the motor reaches the overheat temperature, under a condition in which the current detected by the current detection unit continuously passes through the motor; and a provision unit that provides the time estimated by the time estimation unit.
8 Citations
9 Claims
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1. A control device for a machine tool including a motor for driving a spindle, the control device comprising:
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a current detection unit that detects a current driving the motor; a storage unit that stores overheat temperature specified for the motor; a temperature detection unit that detects temperature of the motor; a time estimation unit that estimates, by using the temperature detected by the temperature detection unit and the overheat temperature, time from when present estimation takes place until the motor reaches the overheat temperature, under a condition in which the current detected by the current detection unit continuously passes through the motor; and a provision unit that provides the time estimated by the time estimation unit. - View Dependent Claims (2, 3, 4, 5)
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6. A control device for a machine tool including a motor for driving a spindle, the control device comprising:
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a current detection unit that detects a current driving the motor; a temperature-increase-value estimation unit that estimates a temperature increase value due to copper loss of the motor to be produced when the current detected by the current detection unit continuously passes through the motor; a storage unit that stores overheat temperature specified for the motor; a time estimation unit that estimates, by using the temperature increase value due to the copper loss and the overheat temperature, time from when present estimation takes place until the motor reaches the overheat temperature, under a condition in which the current used for estimating the temperature increase value due to the copper loss continuously passes through the motor; and a provision unit that provides the time estimated by the time estimation unit. - View Dependent Claims (7, 8, 9)
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Specification