Modular power source for electric ARC welding and output chopper
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B23K-009/10
B23K-009/173
B23K-009/09
출원번호
US-0051196
(2005-02-07)
등록번호
US-9956639
(2018-05-01)
발명자
/ 주소
Kooken, Todd E.
Luo, Lifeng
출원인 / 주소
LINCOLN GLOBAL, INC
대리인 / 주소
Perkins Coie LLP
인용정보
피인용 횟수 :
0인용 특허 :
165
초록▼
A three stage power source for an electric arc welding process comprising an input stage having an AC input and a first DC output signal; a second stage in the form of an unregulated DC to DC converter having an input connected to the first DC output signal, a network of switches switched at a high
A three stage power source for an electric arc welding process comprising an input stage having an AC input and a first DC output signal; a second stage in the form of an unregulated DC to DC converter having an input connected to the first DC output signal, a network of switches switched at a high frequency with a given duty cycle to convert the input into a first internal AC signal, an isolation transformer with a primary winding driven by the first internal high frequency AC signal and a secondary winding for creating a second internal high frequency AC signal and a rectifier to convert the second internal AC signal into a second DC output signal of the second stage; with a magnitude related to the duty cycle of the switches and, a third stage to convert the second DC output signal to a welding output for welding wherein the input stage and the second stage are assembled into a first module and the third stage is assembled into a second module connectable to the first module.
대표청구항▼
1. A power source for an electric arc welding process, said power source comprising: a first module including: an input stage having an AC input and a first DC output signal;a second stage in the form of an unregulated DC to DC converter, unregulated by a feedback signal from the electric arc weldin
1. A power source for an electric arc welding process, said power source comprising: a first module including: an input stage having an AC input and a first DC output signal;a second stage in the form of an unregulated DC to DC converter, unregulated by a feedback signal from the electric arc welding process, having an input configured to receive said first DC output signal, a controller configured to operate a network of switches at a frequency greater than 18 kHz with a duty cycle to convert said received first DC output signal into a first internal AC signal, an isolation transformer with a primary winding driven by said first internal AC signal and a secondary winding for creating a second internal AC signal, and a rectifier to convert said second internal AC signal into a second DC output signal of said second stage, with a magnitude related to said duty cycle of said switches; anda second module including a third stage to convert said second DC output signal to a welding output for welding in said process, said input stage and said second stage being assembled into said first module and said third stage being assembled into said second module so as to be releasably connectable to said first module. 2. The power source as defined in claim 1 wherein said input stage includes a rectifier and a power factor correcting converter. 3. The power source as defined in claim 2 wherein said power factor correcting converter is a boost converter. 4. The power source as defined in claim 2 wherein said power factor converter is a buck converter. 5. The power source as defined in claim 4 wherein said third stage of said second module is a chopper with a power switch operated at a given frequency. 6. The power source as defined in claim 5 wherein said power switch has a soft switching circuit. 7. The power source as defined in claim 6 wherein said soft switching circuit is passive. 8. The power source as defined in claim 5 wherein said chopper is a dual mode chopper with a first polarity path with a first power switch and a first polarity switch and a second polarity path with a second power switch and a second polarity switch. 9. The power source as defined in claim 8 including a second controller with a first mode alternately operating said chopper between said first and second polarity paths and a second mode operating said chopper in only one of said polarity paths. 10. The power source as defined in claim 9 wherein said first and second polarity switches each have a soft switching circuit. 11. The power source as defined in claim 10 wherein said soft switching circuits are passive. 12. The power source as defined in claim 8 wherein said first and second power switches each have a soft switching circuit. 13. The power source as defined in claim 12 wherein said soft switching circuits are passive. 14. The power source as defined in claim 3 wherein said third stage of said second module is a chopper with a power switch operated at a given frequency. 15. The power source as defined in claim 14 wherein said power switch has a soft switching circuit. 16. The power source as defined in claim 15 wherein said soft switching circuit is passive. 17. The power source as defined in claim 14 wherein said chopper is a dual mode chopper with a first polarity path with a first modulating switch and a first polarity switch and a second polarity path with a second modulating switch and a second polarity switch. 18. The power source as defined in claim 17 including a second controller with a first mode alternately operating said chopper between said first and second polarity paths and a second mode operating said chopper in only one of said polarity paths. 19. The power source as defined in claim 18 wherein said first and second modulating switches each have a soft switching circuit. 20. The power source as defined in claim 19 wherein said soft switching circuits are passive. 21. The power source as defined in claim 17 wherein said first and second modulating switches each have a soft switching circuit. 22. The power source as defined in claim 21 wherein said soft switching circuits are passive. 23. The power source as defined in claim 2 wherein said third stage of said second module is a chopper with a power switch operated at a given frequency. 24. The power source as defined in claim 23 wherein said power switch has a soft switching circuit. 25. The power source as defined in claim 24 wherein said soft switching circuit is passive. 26. The power source as defined in claim 23 wherein said chopper is a dual mode chopper with a first polarity path with a first modulating switch and a first polarity switch and a second polarity path with a second modulating switch and a second polarity switch. 27. The power source as defined in claim 26 including a controller with a first mode alternately operating said chopper between said first and second polarity paths and a second mode operating said chopper in only one of said polarity paths. 28. The power source as defined in claim 27 wherein said first and second polarity switches each have a soft switching circuit. 29. The power source as defined in claim 28 wherein said soft switching circuits are passive. 30. The power source as defined in claim 26 wherein said first and second modulating switches each have a soft switching circuit. 31. The power source as defined in claim 30 wherein said soft switching circuits are passive. 32. The power source as defined in claim 1 wherein said third stage of said second module is a chopper with a power switch operated at a given frequency. 33. The power source as defined in claim 32 wherein said power switch has a soft switching circuit. 34. The power source as defined in claim 33 wherein said soft switching circuit is passive. 35. The power source as defined in claim 32 wherein said chopper is a dual mode chopper with a first polarity path with a first modulating switch and a first polarity switch and a second polarity path with a second modulating switch and a second polarity switch. 36. The power source as defined in claim 35 including a second controller with a first mode alternately operating said chopper between said first and second polarity paths and a second mode operating said chopper in only one of said polarity paths. 37. The power source as defined in claim 36 wherein said first and second polarity switches each have a soft switching circuit. 38. The power source as defined in claim 37 wherein said soft switching circuits are passive. 39. The power source as defined in claim 35 wherein said first and second modulating switches each have a soft switching circuit. 40. The power source as defined in claim 39 wherein said soft switching circuits are passive. 41. The power source as defined in claim 1 wherein said third stage of said second module is a circuit with a power switch to perform an STT welding process. 42. The power source as defined in claim 41 wherein said power switch has a soft switching circuit. 43. The power source as defined in claim 42 wherein said soft switching circuit is passive. 44. A power source for an electric arc welding process, said power source comprising: a first module including: an input stage having an AC input and a first DC output signal;a second stage in the form of an unregulated DC to DC converter, unregulated by a feedback signal from the electric arc welding process, having an input configured to receive said first DC output signal, a controller configured to operate a network of switches at a frequency greater than 18 kHz with a duty cycle to convert said received first DC output signal into a first internal AC signal, an isolation transformer with a primary winding driven by said first internal AC signal and a secondary winding for creating a second internal AC signal, and a rectifier to convert said second internal AC signal into a second DC output signal of said second stage, said second stage having a fixed relationship between input and output voltages of the second stage; anda second module including a third stage to convert said second DC output signal to a welding output for welding in said process, said input stage and said second stage being assembled into said first module and said third stage being assembled into said second module so as to be releasably connectable to said first module. 45. The power source as defined in claim 44, further comprising: a duty cycle adjustment circuit connected to said controller and configured to adjust said duty cycle is between different predetermined values. 46. The power source as defined in claim 44 wherein said input stage includes a rectifier and a power factor correcting converter. 47. The power source as defined in claim 46 wherein said power factor correcting converter is a boost converter. 48. The power source as defined in claim 46 wherein said power factor correcting converter is a buck+boost converter. 49. The power source as defined in claim 44 wherein said third stage is a circuit to perform an STT welding process with a power switch. 50. The power source as defined in claim 49 wherein said power switch is operated at a frequency over 18 kHz. 51. The power source as defined in claim 50 wherein said power switch is operated by a pulse width modulator. 52. The power source as defined in claim 44 wherein said third stage of said second module is a chopper with a power switch operated at a given frequency. 53. The power source as defined in claim 52, wherein said power switch has a soft switching circuit. 54. The power source as defined in claim 1, wherein the duty cycle is fixed to a predetermined value during operation of said second stage. 55. The power source as defined in claim 54, further comprising: a duty cycle adjustment circuit connected to said controller and configured to adjust said predetermined value of said fixed duty cycle to a different predetermined value. 56. The power source as defined in claim 54, wherein said duty cycle can be fixed at various levels. 57. The power source as defined in claim 54, wherein said predetermined value fixes said duty cycle in a range from 80% to 100%. 58. The power source as defined in claim 54, wherein said predetermined value fixes said duty cycle to about 100%. 59. The power source as defined in claim 1, wherein said frequency is between 18 kHz and 100 kHz. 60. The power source as defined in claim 1, wherein said second stage includes a smoothing choke connected to said rectifier to smooth second DC output signal. 61. The power source as defined in claim 60, wherein said second stage further includes a capacitor connected to said smoothing choke and said rectifier to smooth second DC output signal. 62. The power source as defined in claim 44, wherein the duty cycle is fixed to a predetermined value during operation of said second stage. 63. The power source as defined in claim 62, wherein said duty cycle can be fixed at various levels. 64. The power source as defined in claim 62, wherein said predetermined value fixes said duty cycle in a range from 80% to 100%. 65. The power source as defined in claim 62, wherein said predetermined value fixes said duty cycle to about 100%. 66. The power source as defined in claim 44, wherein said frequency is between 18 kHz and 100 kHz. 67. The power source as defined in claim 44, wherein said second stage includes a smoothing choke connected to said rectifier to smooth second DC output signal. 68. The power source as defined in claim 67, wherein said second stage further includes a capacitor connected to said smoothing choke and said rectifier to smooth second DC output signal.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (165)
Hori Katsuyoshi (Kure JPX) Butsusaki Yasuhiro (Kure JPX) Takuwa Toshiaki (Yokohama JPX) Matsumura Yoshiaki (Kure JPX), AC TIG welding apparatus using hot wire.
Smolenski Joseph L. (Pittsfield MA) Christopher Gerard W. (Dalton MA) Wright John C. (Pittsfield MA) Relation Alfred E. (Pittsfield MA), AC to DC power conversion circuit with low harmonic distortion.
Karino Kunio (Suita JPX) Fujiyoshi Toshikazu (Kawanishi JPX) Danjo Kenzo (Kizu JPX) Kinoshita Atsushi (Osaka JPX) Moriguchi Haruo (Itami JPX), Arc welder with timed control of arcing recovery and means for reducing weight, size, and power loss in the welder.
Reynolds Jon O. (Appleton WI) Madsen Michael D. (Appleton WI), Buck converter having a variable output and method for buck converting power with a variable output.
Henze Christopher P. (Eagan MN) Mohan Ned (Minneapolis MN) Hayes John G. (Camarillo CA), Constant frequency resonant power converter with zero voltage switching.
Ogawa Kiyoshi (Fuchu JPX) Akao Yoshizo (Hino JPX), Control device for choppers parallel between a DC power source and a load for producing balanced chopper currents.
Bazinet John P. ; O'Connor John A. ; Dalal Dhaval B, Controller for isolated boost converter with improved detection of RMS input voltage for distortion reduction and havin.
Galloway Gary L. (Rockford IL) Latos Thomas S. (Huntley IL) Roe Derrick (Rockford IL), DC current control through an interphase transformer using differential current sensing.
Shikata Kunio,JPX ; Arai Toru,JPX ; Fujiyoshi Toshikazu,JPX ; Omura Takeshi,JPX, DC power supply apparatus including boosting/lowering converter unit and control.
Fletcher James C. Administrator of the National Aeronautics and Space Administration ; with respect to an invention of ( Pasadena CA) Wester Gene W. (Pasadena CA), DC-to-DC converters employing staggered-phase power switches with two-loop control.
Mita Tsuneo,JPX ; Shinada Tsuneo,JPX ; Ichikawa Kazushige,JPX ; Sakamoto Yoshitaka,JPX ; Nomura Koji,JPX ; Nishikawa Seigo,JPX, Gas-shielded AC arc welding method and machine making use of consumable electrode.
Reynolds Jon O. (Appleton WI) Nowak Albert M. (DePere WI), Power selection and protection circuit responsive to an input voltage for providing series or parallel connected inverte.
Yamamoto Hideyuki (Kobe JPX) Nishikawa Waichi (Kobe JPX) Nagasaka Moritoshi (Osaka JPX), Pulse arc welding method and device in which pulse current and background current have a constant current characteristic.
Boylan, Jeffrey John; Chen, Qing; He, Jin; Hilburn, Del Ray, Synchronous rectifier controller to eliminate reverse current flow in a DC/DC converter output.
Lee Fred C. (1405 Westover Dr. Blacksburg VA 24060) Liu Kwang-Hwa (P.O. Box E-3 Blacksburg VA 24060), Zero-current switching quasi-resonant converters operating in a full-wave mode.
Lee Fred C. (1405 Westover Dr. Blacksburg VA 24060) Liu Kwang-Hwa (P.O. Box E-3 Drapers Meadow ; Blacksburg VA 24060), Zero-voltage switching quasi-resonant converters.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.