Invention Grant
- Patent Title: Motor control apparatus and method for controlling motor
-
Application No.: US14520393Application Date: 2014-10-22
-
Publication No.: US09641120B2Publication Date: 2017-05-02
- Inventor: Shuji Matsuda , Hideaki Iura
- Applicant: KABUSHIKI KAISHA YASKAWA DENKI
- Applicant Address: JP Kitakyushu-Shi
- Assignee: KABUSHIKI KAISHA YASKAWA DENKI
- Current Assignee: KABUSHIKI KAISHA YASKAWA DENKI
- Current Assignee Address: JP Kitakyushu-Shi
- Agency: Mori & Ward, LLP
- Priority: JP2013-227133 20131031
- Main IPC: H02P23/00
- IPC: H02P23/00 ; H02J3/18 ; H02P27/06 ; H02P1/02 ; H02P1/28 ; H02P1/30 ; H02P23/28

Abstract:
A motor control apparatus includes a voltage regulator to execute a voltage increase mode to increase a voltage applied to an induction motor from a lower limit of a first range over time. A frequency regulator executes a frequency decrease mode to decrease a frequency of the voltage from an upper limit of a second range over time. When a current through the motor exceeds a first threshold in the voltage increase mode, a mode changer changes the mode to the frequency decrease mode. When the current through the motor becomes smaller than a second threshold in the frequency decrease mode, the mode changer changes the mode to the voltage increase mode to control the motor to change from a free running state to a state in which the voltage and the frequency satisfy a relationship. A determinator determines whether the voltage and the frequency satisfy the relationship.
Public/Granted literature
- US20150115864A1 MOTOR CONTROL APPARATUS AND METHOD FOR CONTROLLING MOTOR Public/Granted day:2015-04-30
Information query