MOTOR DRIVER FOR MACHINE TOOL WITH FAN MOTOR
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United States of America Patent
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-
N/A
Issued Date -
Apr 28, 2011
app pub date -
Aug 31, 2010
filing date -
Oct 26, 2009
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A motor driver for a machine tool, which comprises a fan motor, configured to drive a cooling fan for cooling a radiator or the interior of the motor driver, estimates a rate of heat release within a heating element or the motor driver, based on information obtained from a motor current detector used for motor control or from an input current detector of the motor driver, and adjusts a fan motor power supply voltage to control a rotational speed of the fan motor in accordance with the estimated heat release value.
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