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Angular position estimation for PM motors
US9705437B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9705437-B2 |
| Application number | US-201514721716-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 26, 2015 |
| Priority date | Sep 24, 2014 |
| Publication date | Jul 11, 2017 |
| Grant date | Jul 11, 2017 |
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Abstract
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A method of determining the angular position (θ) of a rotor of an N-phase permanent magnet motor (PMM) includes providing a processor having an associated memory, wherein the memory stores an angular position determination (APD) equation or hardware is included implementing the APD equation. The APD equation determines the angular position from N-phase measurements obtained from the stator windings associated with each of the N-phases. A voltage or a current is forced upon the stator terminals of the stator windings for each of the N-phases, a resulting stator current or stator voltage is sensed to provide the N-phase measurements responsive to the forcing of the voltage or current, and the APD equation is used to determine the angular position from the N-phase measurements.
First claim
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The invention claimed is: 1. A method of determining an angular position of a rotor in an N-phase permanent magnet motor (PMM), comprising: providing a processor having an associated memory, wherein said memory stores an angular position determination (APD) equation or hardware is included implementing said APD equation, said APD equation determining said angular position from N-phase measurements obtained from stator windings associated with each of said N-phases; forcing a voltage or a current upon stator terminals of said stator windings for each of said N-phases; sensing a resulting stator current or stator voltage to provide said N-phase measurements responsive to said forcing said voltage or current, and using said APD equation, determining said angular position from said N-phase measurements; wherein said forcing comprises forcing said voltage and said sensing comprises sensing said resulting stator current; wherein said sensing said resulting stator current comprises sensorless sensing; wherein said APD equation is given by: θ = tan - 1 ( ( ∑ n = 1 N A n 2 sin ( 2 π · ( n - 1 ) N ) cos ( 2 π · ( n - 1 ) N ) ) ( ∑ n = 1 N A n x n cos ( 2 π · ( n - 1 ) N ) ) - ( ∑ n = 1 N A n 2
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- H02P6/182Primary
using back-emf in windings · CPC title
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- What does patent US9705437B2 cover?
- A method of determining the angular position (θ) of a rotor of an N-phase permanent magnet motor (PMM) includes providing a processor having an associated memory, wherein the memory stores an angular position determination (APD) equation or hardware is included implementing the APD equation. The APD equation determines the angular position from N-phase measurements obtained from the stator wind…
- Who is the assignee on this patent?
- Texas Instruments Inc
- What technology area does this patent fall under?
- Primary CPC classification H02P6/182. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jul 11 2017 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).