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Apparatus for controlling speed in induction motor
US8970140B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8970140-B2 |
| Application number | US-201213541624-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 3, 2012 |
| Priority date | Jul 5, 2011 |
| Publication date | Mar 3, 2015 |
| Grant date | Mar 3, 2015 |
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Abstract
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Provided is an apparatus for controlling speed in induction motor in which tension command and friction loss compensation are used to calculate a torque limit relative to an output of a speed controller, which is then used to limit the speed of the induction motor, whereby a tension sensor and a position sensor are not used in the continuous processing line to improve performance of the vector control type induction motor.
First claim
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What is claimed is: 1. An apparatus for controlling speed in an induction motor driving a roller, the apparatus including a detector detecting a rotation speed of an induction motor, the apparatus comprising: a first calculation unit configured to calculate a diameter of a material wound on the roller using the rotation speed, a minimum diameter of the material, a maximum speed of the induction motor and a line speed command; a second calculation unit configured to calculate a c…
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- What does patent US8970140B2 cover?
- Provided is an apparatus for controlling speed in induction motor in which tension command and friction loss compensation are used to calculate a torque limit relative to an output of a speed controller, which is then used to limit the speed of the induction motor, whereby a tension sensor and a position sensor are not used in the continuous processing line to improve performance of the vector …
- Who is the assignee on this patent?
- Byun Sung Hoon, Lsis Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H02P21/06. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 03 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).