Control apparatus for a synchronous motor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 23, 2021
Grant Date -
Nov 21, 2019
app pub date -
Jul 31, 2019
filing date -
Jan 31, 2017
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A drive control unit that performs vector control of a synchronous motor determines reference phase angles of 3-phase/DQ converters, and a DQ/3-phase converter. When speed of a synchronous motor is equal to or higher than a predetermined threshold value, the reference phase angle is obtained by adding a correction angle such that D-axis voltage feedback output from 3-phase/DQ converter becomes zero to the detection angle of a position detector. And when the speed of the synchronous motor is less than a predetermined threshold value, the reference phase angle is obtained by adding a low speed load angle set in advance to the detection angle of the position detector. In a vector control operation, a power factor is achieved by controlling the D-axis current to be zero.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully