Motor driving system
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United States of America Patent
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Sep 4, 2018
Grant Date -
Mar 2, 2017
app pub date -
Nov 10, 2016
filing date -
May 13, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
In a motor driving system, a motor driving system is provided which simplifies the system by ceasing ON/OFF control of a commercial driving command, and by performing commercial synchronous transfer and capture control based on a drive speed reference. A system controller performs synchronization control so as to make a drive output coincident with a phase/amplitude of a commercial AC power source when a rotation speed of a motor exceeds a drive speed reference n2, and when a prescribed requirement is satisfied, the commercial AC power source is synchronously transferred, and the motor is driven by the commercial AC power source. In addition, when the drive speed reference is set to n1, and a drive output side switch is closed, the drive output is connected to the commercial AC power source, and when a prescribed requirement is satisfied, the motor is started to be driven at a variable speed (t7), and thereby the synchronous capture is performed.
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