GB393958A - Improvements in electrical induction furnaces without closed ferro-magnetic circuits - Google Patents
Improvements in electrical induction furnaces without closed ferro-magnetic circuitsInfo
- Publication number
- GB393958A GB393958A GB31142/31A GB3114231A GB393958A GB 393958 A GB393958 A GB 393958A GB 31142/31 A GB31142/31 A GB 31142/31A GB 3114231 A GB3114231 A GB 3114231A GB 393958 A GB393958 A GB 393958A
- Authority
- GB
- United Kingdom
- Prior art keywords
- turns
- ampere
- algebraic sum
- ferro
- closed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
393,958. Transformers. ALLM€NNA SVENSKA ELEKTRISKA AKTIEBOLAGET, Võsteras, Sweden. Nov. 10, 1931, No. 31142. Convention date, Feb. 9. [Class 38 (ii).] The furnaces wherein the inductance coil consists of a number of groups a<1> .. a<5> arranged in parallel, and transformer windings c are arranged in series with some or all of the groups to obtain the required current distribution, the algebraic sum of the ampere-turns of the transformer windings is at most equal to the excitation ampere-turns. In one arrangement the algebraic sum of the ampere-turns of the secondaries is zero. In other arrangements the algebraic sum differs by an amount equal to the excitation ampere-turns so that a primary winding is unnecessary. The transformer may be designed for unequal or equal current distribution between the furnace windings. The method of calculating the ampere turns necessary for the various transformer windings is described and a particular example is worked out in detail.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE393958X | 1931-02-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB393958A true GB393958A (en) | 1933-06-12 |
Family
ID=20309345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31142/31A Expired GB393958A (en) | 1931-02-09 | 1931-11-10 | Improvements in electrical induction furnaces without closed ferro-magnetic circuits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB393958A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2518872A (en) * | 1947-11-15 | 1950-08-15 | Asea Ab | Induction furnace |
-
1931
- 1931-11-10 GB GB31142/31A patent/GB393958A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2518872A (en) * | 1947-11-15 | 1950-08-15 | Asea Ab | Induction furnace |
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