Method and system for controlling synchronous machine as generator/starter
US-9209741-B2 · Dec 8, 2015 · US
Main field voltage limiter in brushless synchronous machines
US10084409B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10084409-B2 |
| Application number | US-201414288016-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 27, 2014 |
| Priority date | May 27, 2014 |
| Publication date | Sep 25, 2018 |
| Grant date | Sep 25, 2018 |
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Abstract
Official abstract text for this publication.
A brushless synchronous machine with a limiter for main field voltage and a method of limiting main field voltage in a brushless synchronous machine are described. The machine includes a regulator to use a field current to excite main field windings and generate the main field voltage. The machine also includes a limiter to limit the field current to maintain the main field voltage corresponding to the field current below a limit based on a transfer function.
First claim
Opening claim text (preview).
The invention claimed is: 1. A brushless synchronous machine with a limiter for a main field voltage, the brushless synchronous machine comprising: a regulator configured to use a field current to excite main field windings and generate the main field voltage; and a limiter configured to limit the field current to maintain the main field voltage corresponding to the field current below a limit based at least in part on an estimation of the main field voltage based at least in part on an applied field current. 2. The brushless synchronous machine of claim 1 , wherein the limiter limits an automatic voltage regulator (AVR) set point used to determine the field current. 3. The brushless synchronous machine of claim 1 , wherein the limit is based on a manufacturer specification. 4. The brushless synchronous machine of claim 1 , wherein the limit is based on a user specification. 5. The brushless synchronous machine of claim 1 , wherein the limit is based on a region of use of the brushless synchronous machine. 6. The brushless synchronous machine of claim 1 , wherein the estimation is based on using a curve fitting technique on data points provided by a manufacturer of the brushless synchronous machine. 7. The brushless synchronous machine of claim 2 , wherein the AVR set point is determined based on feedback of a terminal voltage of the brushless synchronous machine which results from the main field voltage and is compared with a maximum AVR set point corresponding with the limit. 8. A method of limiting a main field voltage in a brushless synchronous machine, the method comprising: regulating a field current to excite main field windings and generate the main field voltage; and limiting the field current to maintain the main field voltage corresponding to the field current below a limit based at least in part on an estimation of the main field voltage based at least in part on an applied field current. 9. The method of claim 8 , wherein the limiting includes limiting an automatic voltage regulator (AVR) set point used to determine the field current. 10. The method of claim 8 , further comprising obtaining the limit based on specifications from a manufacturer of the brushless synchronous machine. 11. The method of claim 8 , comprising obtaining the limit based on a user specification. 12. The method of claim 8 , comprising obtaining the limit based on a region of use of the brushless synchronous machine. 13. The method of claim 8 , wherein the estimation includes a curve fitting technique on data points provided by a manufacturer of the brushless synchronous machine. 14. The method of claim 9 , comprising obtaining the AVR set point, determined based on feedback of a terminal voltage of the brushless synchronous machine which results from the main field voltage, to compare the AVR set point with a maximum AVR set point corresponding with the limit.
Assignees
Inventors
Classifications
Synchronous machines, e.g. with permanent magnets or DC excitation · CPC title
- H02P9/14Primary
by variation of field (H02P9/08, H02P9/10 take precedence) · CPC title
with brushless excitation · CPC title
Synchronous motors · CPC title
Brushless excitation · CPC title
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Frequently asked questions
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- What does patent US10084409B2 cover?
- A brushless synchronous machine with a limiter for main field voltage and a method of limiting main field voltage in a brushless synchronous machine are described. The machine includes a regulator to use a field current to excite main field windings and generate the main field voltage. The machine also includes a limiter to limit the field current to maintain the main field voltage correspondin…
- Who is the assignee on this patent?
- Gen Electric
- What technology area does this patent fall under?
- Primary CPC classification H02P9/14. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Sep 25 2018 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).