GB845671A - Improvements relating to alternating current frequency converters - Google Patents
Improvements relating to alternating current frequency convertersInfo
- Publication number
- GB845671A GB845671A GB2051857A GB2051857A GB845671A GB 845671 A GB845671 A GB 845671A GB 2051857 A GB2051857 A GB 2051857A GB 2051857 A GB2051857 A GB 2051857A GB 845671 A GB845671 A GB 845671A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transformer
- rectifiers
- anodes
- cathodes
- june
- 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
- 238000004804 winding Methods 0.000 abstract 3
- 238000010438 heat treatment Methods 0.000 abstract 2
- 230000004048 modification Effects 0.000 abstract 2
- 238000012986 modification Methods 0.000 abstract 2
- 239000003990 capacitor Substances 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 230000006698 induction Effects 0.000 abstract 1
- 230000016507 interphase Effects 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 abstract 1
- 230000010355 oscillation Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/005—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases using discharge tubes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Induction Heating (AREA)
- Furnace Details (AREA)
Abstract
845,671. Converting. HACKBRIDGE & HEWITTIC ELECTRIC CO. Ltd., and GLEN, J. June 10, 1958 [June 28, 1957], No. 20518/57. Class 38 (2). A frequency-changing arrangement for supplying current to the heating coil H of an induction furnace comprises a transformer T1 having a multiphase secondary system feeding a pair of grid-controlled rectifiers each of which has as many anodes as there are phases in the supply, corresponding anodes being connected in parallel and the cathodes being connected to an autotransformer T2 connected to the heating coil. The mid point of the transformer T2 is connected to the neutral point of the secondary winding system and the grids are controlled by voltages derived through a transformer T3 from a phase-displacement circuit C3, R3 across the transformer T2. In a modification (Fig. 2, not shown) the rectifiers each have six anodes supplied from a double star secondary winding system with an interphase reactor connecting the star points. In a further modification four rectifiers are utilized, the cathodes being connected to two primary windings of a H.F. transformer replacing the transformer T2. In starting, closure of contacts CC allows a previously charged capacitor C to discharge and to initiate oscillations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2051857A GB845671A (en) | 1957-06-28 | 1957-06-28 | Improvements relating to alternating current frequency converters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2051857A GB845671A (en) | 1957-06-28 | 1957-06-28 | Improvements relating to alternating current frequency converters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB845671A true GB845671A (en) | 1960-08-24 |
Family
ID=10147203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2051857A Expired GB845671A (en) | 1957-06-28 | 1957-06-28 | Improvements relating to alternating current frequency converters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB845671A (en) |
-
1957
- 1957-06-28 GB GB2051857A patent/GB845671A/en not_active Expired
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