Method for operating a synchronous motor
US-10291160-B1 · May 14, 2019 · US
Method for operating a rolling piston compressor
US10823172B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10823172-B2 |
| Application number | US-201815911226-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 5, 2018 |
| Priority date | Mar 5, 2018 |
| Publication date | Nov 3, 2020 |
| Grant date | Nov 3, 2020 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A method of operating a rolling piston rotary compressor includes obtaining an angular position and an angular speed of a rolling piston of the compressor, for example, using a tachometer or shaft encoder or observer. The method further includes obtaining an electromagnetic torque applied by an electric motor that is mechanically coupled to the rolling piston. The method further includes calculating a load torque exerted on the rolling piston based on these obtained values by using a load torque observer model that is formulated using known geometries of the compressor and thermodynamic models for the gas compression process. The operation of the electric motor is then adjusted such that the electromagnetic torque applied by the motor is equivalent to the calculated load torque such that noise and vibrations are minimized.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for operating a rolling piston compressor, comprising: obtaining an angular position and an angular speed of a rolling piston of the compressor; obtaining an electromagnetic torque applied by an electric motor mechanically coupled to the rolling piston; calculating a load torque exerted on the rolling piston using a load torque observer model based on the angular position of the rolling piston, the angular speed of the rolling piston, and the electromagnetic torque applied by the electric motor; and operating the electric motor to adjust the electromagnetic torque to be equivalent to the calculated load torque. 2. The method of claim 1 , wherein the load torque observer model comprises: T L = γ WP = ( 2 rl sin θ c 2 ) · ( ( R - r ) sin θ c 2 ) [ W 1 W 2 ] [ P s P d ] where W 1 and W 2 are defined by the following piecewise function Piecewise Condition W 1 W 2 Compression P c (t) < P d ( V TDC V c ( θ m ) ) n - 1 0 Discharge P c (t) ≥ P d −1 1 θ m is the angular position of the rolling piston; R is a radius of a cylindrical cavity; r is a radius of the rolling piston; θ c = Δ θ m + sin - 1 ( R - r r sin θ m ) ; l is a depth of the cylindrical cavity;
Assignees
Inventors
Classifications
Electric current · CPC title
angular · CPC title
Prime movers · CPC title
Hermetic pumps · CPC title
Controlled or regulated · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US10823172B2 cover?
- A method of operating a rolling piston rotary compressor includes obtaining an angular position and an angular speed of a rolling piston of the compressor, for example, using a tachometer or shaft encoder or observer. The method further includes obtaining an electromagnetic torque applied by an electric motor that is mechanically coupled to the rolling piston. The method further includes calcul…
- Who is the assignee on this patent?
- Haier Us Appliance Solutions Inc
- What technology area does this patent fall under?
- Primary CPC classification F04C18/356. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Nov 03 2020 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).