Title: Power control system for electric arc or refining furnace electrically directly coupled to independent power generating unit or units

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Claims: What is claimed is:

1. A power control system for controlling the power supply to an electric heating load of an electric arc furnace independently of any line source comprising an independent, self-contained power generating unit including a prime mover and generator for furnishing power to said load, means for sensing changes in the operating conditions of said furnace, and means controlled by said sensing means for adjusting the power output of said generator to thereby control the power furnished to said load.

2. A power control system as defined in claim 1 wherein the power control is made by the adjustment of the frequency ( = p.n/60 Hz, where p = number of poles of generator and n = operating speed of a prime mover coupled to said generator) depending upon the operating conditions of said furnace.

3. A power control system as defined in claim 1 wherein the power control is made by the adjustment of the generator voltage ( = K..PHI..n, where K = constant, .PHI. = flux density and n = operating speed of a prime mover mechanically coupled to each generator) depending upon the operating conditions of said furnace.

4. A power control system as defined in claim 2 wherein the power control is made by suitably selecting the frequency of the generator voltage of the generator depending upon the operating conditions of said furnace.

5. A power control system as defined in claim 3 wherein the power control is made by suitably adjusting the generator voltage of the generator depending upon the operation conditions of said furnace.

6. A power control system as defined in claim 1 wherein a saturable reactor is placed between each independent power generating unit and said electric heating load for the power control depending upon the operating conditions of said furnace.

7. A power control system as defined in claim 6 wherein the power control is made by the suitable selection of the frequency of the generator voltage of the generator depending upon the operation conditions of said furnace.

8. . A power control system as defined in claim 6 wherein the power control is made by the suitable selection of the generator voltage depending upon the operating conditions of said furnace.

9. A power control system as defined in claim 6 wherein the power control is made by the suitable selection of the frequency of the generator voltage of each generator for each electrode in said furnace depending upon the operation conditions thereof.

10. A power control system as defined in claim 6 wherein the power control is made by the suitable selection of the generator voltage of each generator for each electrode in said furnace depending upon the operating conditions thereof.

Other info:

Inventors: Nanjyo, Toshio (Yokohama, JA)
Yasukawa, Shozo (Yokosuka, JA)

Application Number: 515170
Filing Date: 1974-10-16
Publication_date: 1976-04-20
Assignee: Ishikawajima-Harima Jukogyo Kabushiki Kaisha (Tokyo, JA)
Primary Class(es): 373/104 219/134
Other Classes:
US Patent Ref:

3183294	May, 1965	Kasper	13/12.
3743752	Jul, 1973	Furuhashi	13/12.

Other Refs:
Primary Examiner: Envall, Jr., R. N.
Assistant Examiner:
Attorney: Scrivener Parker Scrivener & Clarke