Invention Grant
- Patent Title: Quasi variable frequency motor controller
- Patent Title (中): 准变频电机控制器
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Application No.: US14321330Application Date: 2014-07-01
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Publication No.: US09350275B2Publication Date: 2016-05-24
- Inventor: Kun Wei , HaiHui Lu , Andrew Jaap , David Messersmith , Randall Langer , Ping Lee
- Applicant: Rockwell Automation Technologies, Inc.
- Applicant Address: US OH Mayfield Heights
- Assignee: ROCKWELL AUTOMATION TECHNOLOGIES, INC.
- Current Assignee: ROCKWELL AUTOMATION TECHNOLOGIES, INC.
- Current Assignee Address: US OH Mayfield Heights
- Agency: Kunzler Law Group
- Priority: CN201410211092 20140519
- Main IPC: H02P1/04
- IPC: H02P1/04 ; H02P1/16 ; H02P1/40

Abstract:
An apparatus for a quasi variable frequency motor controller is includes a DFC module that applies a first frequency to a motor as part of a discrete frequency control (“DFC”) method for motor starting. The first frequency includes a discrete frequency in a plurality of discrete frequencies of the DFC method and each discrete frequency includes a frequency lower than a fundamental frequency of an alternating current (“AC”) voltage source providing power to the motor. The apparatus includes a torque module that determines when motor torque generated by the motor reaches a negative torque threshold and a next frequency module that applies a second frequency to the motor in response to the torque module determining that the motor torque has reached the negative torque threshold. The second frequency is a next frequency in the DFC method.
Public/Granted literature
- US20150333663A1 QUASI VARIABLE FREQUENCY MOTOR CONTROLLER Public/Granted day:2015-11-19
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