Motor control system and vacuum pump equipped with the motor control system
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United States of America Patent
Stats
-
Jul 17, 2007
Grant Date -
Mar 10, 2005
app pub date -
Sep 8, 2004
filing date -
Sep 10, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A motor control system has a rotary member, a motor for imparting a torque to the rotary member, a motor driving circuit for supplying power to the motor, and a drive control circuit for controlling a motor current supplied to the motor. An upper limit value of the motor current supplied to the motor is set so as to be variable. At the start of the motor, the drive control means controls the motor current by using the upper limit value as a set value.
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