Electric heating – Metal heating – By arc
Patent
1993-04-29
1995-04-11
Shaw, Clifford C.
Electric heating
Metal heating
By arc
363 17, B23K 910
Patent
active
054060516
ABSTRACT:
A welding machine includes a power source having a high frequency, zero-voltage switching converter. The preferred power source includes an input rectifier bridge, a zero-voltage switched inverter, a high frequency transformer and an output rectifier. The inverter switches at zero voltage without adding extra inductive or capacitive components, and without increasing voltage or current stresses on the welding machine architecture. A controller operates converter switching devices to turn on at zero voltage. This system avoids switching losses and drastically increases the switching frequency to avoid audible switching noise levels. Advantageously, passive components are reduced in size to yield a more compact welding machine, which is capable of more uniform welding than earlier designs.
REFERENCES:
patent: 4520255 (1985-05-01), Bredenkamp et al.
patent: 4521672 (1985-06-01), Fronius
patent: 4621312 (1986-11-01), Yuzurihara et al.
patent: 4672528 (1987-06-01), Park et al.
patent: 4794506 (1988-12-01), Hino et al.
patent: 4855888 (1989-08-01), Henze et al.
patent: 4860189 (1989-08-01), Hitchcock
patent: 4864479 (1989-09-01), Steigerwald et al.
patent: 4901216 (1990-02-01), Small
patent: 4912622 (1990-03-01), Steigerwald et al.
patent: 4916599 (1990-04-01), Traxler et al.
patent: 4953068 (1990-08-01), Henze
patent: 5017757 (1991-05-01), Kawai et al.
patent: 5132888 (1992-07-01), Lo et al.
patent: 5132889 (1992-07-01), Hitchcock et al.
patent: 5134307 (1992-07-01), Nakano
patent: 5157592 (1992-10-01), Walters
patent: 5157593 (1992-10-01), Jain
National Electrical Manufacturers Association. Electric Arc Welding Power Sources. NEMA Publication No. EW1, (1989) pp. 1-37.
H. B. Cary, Modern Welding Technology, (New Jersey, 1989) Chapter 10, pp. 301-339.
F. S. Tsai, "Small-Signal and Transient Analysis of a Zero-Voltage-Switched, Phase-Controlled PWM Converter Using Averaged Switch Model," Conference Record of IEEE IAS Annual Meeting, (Michigan, 1991) pp. 1010-1016.
Q. Chen, A. Lofti, and F. C. Lee, "Optimization and Design Issues of Low Output Voltage, Off-Line, Zero-Voltage Switched PWM Converter," Proceedings of 1992 APEC Conference, (Massachusetts, 1992) pp. 73-80.
Electric Power Research Institute
Shaw Clifford C.
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