GB683998A - Improvements in or relating to constant load-voltage electric circuits - Google Patents
Improvements in or relating to constant load-voltage electric circuitsInfo
- Publication number
- GB683998A GB683998A GB22151/51A GB2215151A GB683998A GB 683998 A GB683998 A GB 683998A GB 22151/51 A GB22151/51 A GB 22151/51A GB 2215151 A GB2215151 A GB 2215151A GB 683998 A GB683998 A GB 683998A
- Authority
- GB
- United Kingdom
- Prior art keywords
- load
- line
- impedance
- reactance
- input end
- 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
- H05B6/46—Dielectric heating
- H05B6/48—Circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H2/00—Networks using elements or techniques not provided for in groups H03H3/00 - H03H21/00
- H03H2/005—Coupling circuits between transmission lines or antennas and transmitters, receivers or amplifiers
- H03H2/006—Transmitter or amplifier output circuits
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of High-Frequency Heating Circuits (AREA)
- General Induction Heating (AREA)
- Electrotherapy Devices (AREA)
Abstract
683,998. Dielectric heating. WESTING- HOUSE ELECTRIC INTERNATIONAL CO. Sept. 21, 1951 [Oct. 27, 1950], No. 22151/51. Class 39(iii) [Also in Groups XXXV and XL(c)] Apparatus for supplying constant voltage across a varying load (e.g. a high frequency dielectric heater 24) comprises a radio-frequency source 10 coupled to the load 24 through an impedance-inverting quarter-wave line 14, the load being tuned away from resonance by a variable shunt reactance 28 of opposite sign to the load, and the source being coupled to the line through an impedance (e.g. the transformer 12 and condenser 16) which is high compared with the load impedance as seen from the input end of the line. As shown, the load 24 is capacitive, and the reactance 28 is inductive, the reactance 28 being adjusted so that the circuit 24, 28 remains on the inductive side of resonance throughout the heating process, and is of high impedance. This impedance is reflected as a low impedance at the input end of the line 14 and its variations have little effect on the current fed to the line through the condenser 16, which forms, together with the output coil 18 of the transformer 12, an off-tune series combination of high impedance. Current at the input end of the line thus remains substantially constant, and produces constant voltage at the load end of the line. -
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US192423A US2727212A (en) | 1950-10-27 | 1950-10-27 | Constant load voltage circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB683998A true GB683998A (en) | 1952-12-10 |
Family
ID=22709584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22151/51A Expired GB683998A (en) | 1950-10-27 | 1951-09-21 | Improvements in or relating to constant load-voltage electric circuits |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2727212A (en) |
| DE (1) | DE896399C (en) |
| GB (1) | GB683998A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2206251A (en) * | 1987-06-17 | 1988-12-29 | Hiden Analytical Limited | Power supply circuit for RF-energised load |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1514322C3 (en) * | 1965-11-12 | 1974-06-06 | Philips Patentverwaltung Gmbh, 2000 Hamburg | Circuit arrangement for igniting and operating a high-frequency induction plasma torch |
| EP3780908B1 (en) * | 2018-05-15 | 2022-06-08 | Mitsubishi Electric Corporation | Dielectric heating device and dielectric heating electrode |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB448779A (en) * | 1934-11-14 | 1936-06-15 | Marconi Wireless Telegraph Co | Improvements in or relating to remote control arrangements and feeder arrangements for use in radio and like high frequency systems |
| US2396708A (en) * | 1942-09-14 | 1946-03-19 | Gen Electric | Impedance transformer |
| US2473143A (en) * | 1945-02-07 | 1949-06-14 | Singer Mfg Co | Electrostatic bonding machine |
| US2473041A (en) * | 1945-08-09 | 1949-06-14 | Swift & Co | High-frequency electrostatic field apparatus for egg pasteurization |
| US2563098A (en) * | 1948-08-31 | 1951-08-07 | Rca Corp | High-frequency dielectric heating system |
| US2523791A (en) * | 1948-11-26 | 1950-09-26 | Gen Electric | Automatic tuning system |
-
1950
- 1950-10-27 US US192423A patent/US2727212A/en not_active Expired - Lifetime
-
1951
- 1951-09-09 DE DEW6674A patent/DE896399C/en not_active Expired
- 1951-09-21 GB GB22151/51A patent/GB683998A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2206251A (en) * | 1987-06-17 | 1988-12-29 | Hiden Analytical Limited | Power supply circuit for RF-energised load |
Also Published As
| Publication number | Publication date |
|---|---|
| DE896399C (en) | 1953-11-12 |
| US2727212A (en) | 1955-12-13 |
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