IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0190076
(2011-07-25)
|
등록번호 |
US-8786262
(2014-07-22)
|
발명자
/ 주소 |
- Rajashekara, Kaushik
- Alt, John Timothy
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
6 인용 특허 :
16 |
초록
▼
One embodiment of the present invention is a unique method of controlling the output of a synchronous electrical machine. Another embodiment is a unique method of controlling the output of a synchronous electrical machine for powering a load. Still another embodiment is a unique aircraft power gener
One embodiment of the present invention is a unique method of controlling the output of a synchronous electrical machine. Another embodiment is a unique method of controlling the output of a synchronous electrical machine for powering a load. Still another embodiment is a unique aircraft power generation system. Other embodiments include apparatuses, systems, devices, hardware, methods, and combinations for fluid driven actuation systems. Further embodiments, forms, features, aspects, benefits, and advantages of the present application will become apparent from the description and figures provided herewith.
대표청구항
▼
1. A method of controlling an output of a synchronous electrical machine, comprising: comparing a desired DC voltage to an actual DC voltage;determining an operating frequency of the synchronous electrical machine;determining a flux component current and a torque component current based on: the comp
1. A method of controlling an output of a synchronous electrical machine, comprising: comparing a desired DC voltage to an actual DC voltage;determining an operating frequency of the synchronous electrical machine;determining a flux component current and a torque component current based on: the comparison; the operating frequency; and a predetermined value;controlling a stator winding current in a stator winding of the electrical machine based on the torque component current; andcontrolling an excitation current of a field winding of the electrical machine using the flux component current to achieve the desired DC voltage. 2. The method of claim 1, wherein the flux component current is a field winding flux component current; and wherein torque component current is a stator winding torque component current. 3. The method of claim 1, wherein the predetermined value is a flux value determined based on the comparison and the operating frequency. 4. The method of claim 3, wherein the flux value is obtained from a lookup table during operation of the electrical machine. 5. The method of claim 1, wherein the predetermined value is obtained from a lookup table during operation of the electrical machine. 6. The method of claim 5, wherein the lookup table includes a plurality of predetermined values; and wherein each predetermined value corresponds to a potential result of the comparison and a potential operating frequency. 7. The method of claim 1, wherein the operating frequency is an instantaneous operating frequency value obtained during operation of the electrical machine; and wherein the actual DC voltage is an instantaneous actual voltage value obtained during operation of the electrical machine. 8. The method of claim 1, further comprising: determining an angular position of the synchronous electrical machine; and determining a reference stator winding current value based on the torque component current and the angular position. 9. The method of claim 8, further comprising comparing the reference stator winding current value with a measured stator winding current value from a stator winding of the synchronous electrical machine to determine a stator winding current error. 10. The method of claim 9, further comprising generating a pulse width modulation signal based on the stator winding current error. 11. A method of controlling an output of a synchronous electrical machine for powering a load, comprising: providing an electronic element configured to output a flux value based on a first input value and a second input value, wherein the first input value is based on a difference value between a desired output value and a corresponding actual output value; wherein the second input value is an operating frequency of the synchronous electrical machine; and wherein the flux value varies with changes in the difference value and the operating frequency;operating the synchronous electrical machine;determining the first input value while operating the synchronous electrical machine;detecting the second input value while operating the synchronous electrical machine;inputting the first input value and the second input value into the electronic element;outputting the flux value based on the first input value and the second input value;determining a flux component current and a torque component current based on: flux value;controlling a stator winding current in a stator winding of the electrical machine based on the torque component current; andcontrolling an excitation current of a field winding of the electrical machine using the flux component current to achieve the desired output value. 12. The method of claim 11, further comprising storing a relationship between a plurality of flux values and a plurality of combinations of first input values and second input values in the electronic element, wherein the flux value is determined based on the relationship, the first input value and the second input value. 13. The method of claim 11, wherein the electronic element includes a lookup table stored therein and configured to output the flux value based on the first input value and the second input value. 14. The method of claim 11, further comprising determining an angular position of the synchronous electrical machine based on the operating frequency of the synchronous electrical machine. 15. The method of claim 14, further comprising determining a reference stator winding current value based on the torque component current and the angular position. 16. The method of claim 15, further comprising: comparing the reference stator winding current value with a measured stator winding current value from a stator winding of the synchronous electrical machine to determine a stator winding current error value; and generating a pulse width modulation signal based on the stator winding current error value. 17. The method of claim 11, wherein the operating frequency is a rotational speed of the synchronous electrical machine. 18. The method of claim 11, wherein the first input value is a load reference current value. 19. The method of claim 11, wherein the output of the synchronous electrical machine is performed without using field winding current control for the synchronous electrical machine based on stator winding ac voltage of the synchronous electrical machine. 20. An aircraft power generation system, comprising: an engine;a synchronous generator coupled to and powered by the engine, wherein the synchronous generator has a field winding and a stator winding;a first electronic element configured to output a flux value based on a first input value and a second input value, wherein the first input value is based on a difference value between a desired output value of the power generation system and a corresponding actual output value; wherein the second input value is an operating frequency of the synchronous generator; and wherein the flux value output by the first electronic element varies with changes in the difference value and the operating frequency during the operation of the synchronous generator;a second electronic element configured to output the first input value;a third electronic element coupled to the first electronic element and the second electronic element, and configured as a transfer function operable to convert the flux value and the first input value into a torque component current value configured for controlling a stator winding current in the stator winding; anda fourth electronic element coupled to the first electronic element and configured to convert the flux value into a field winding reference value configured for controlling an excitation current in the field winding. 21. The aircraft power generation system of claim 20, further comprising: an integrator coupled to the synchronous generator and configured to integrate the operating frequency to provide an angular position of the synchronous generator; andmeans for controlling a stator winding current in the stator winding based on the angular position and the torque component current value. 22. The aircraft power generation system of claim 21, wherein the means for controlling is configured to generate a reference stator winding current value, and is configured to compare the reference stator winding current value with a measured stator winding current value to yield a stator winding current error value; and wherein the means for controlling is configured to control the stator winding current based on the stator winding current error value. 23. The aircraft power generation system of claim 22, wherein the means for controlling is configured to generate a pulse width modulation signal based on the stator winding current error value. 24. The aircraft power generation system of claim 20, further comprising a DC bus powered by the synchronous generator, wherein the desired output value is a reference voltage, and wherein the actual output value is a DC bus voltage.
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