GB1410864A - Circuits for operating electromagnetic energy generators - Google Patents
Circuits for operating electromagnetic energy generatorsInfo
- Publication number
- GB1410864A GB1410864A GB5151073A GB5151073A GB1410864A GB 1410864 A GB1410864 A GB 1410864A GB 5151073 A GB5151073 A GB 5151073A GB 5151073 A GB5151073 A GB 5151073A GB 1410864 A GB1410864 A GB 1410864A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnetron
- supply
- relay
- source
- thyristor
- 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
- H05B6/64—Heating using microwaves
- H05B6/66—Circuits
- H05B6/666—Safety circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B9/00—Generation of oscillations using transit-time effects
- H03B9/01—Generation of oscillations using transit-time effects using discharge tubes
- H03B9/10—Generation of oscillations using transit-time effects using discharge tubes using a magnetron
-
- 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
- H05B2206/00—Aspects relating to heating by electric, magnetic, or electromagnetic fields covered by group H05B6/00
- H05B2206/04—Heating using microwaves
- H05B2206/043—Methods or circuits intended to extend the life of the magnetron
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of High-Frequency Heating Circuits (AREA)
- Microwave Tubes (AREA)
Abstract
1410864 Supply circuits for microwave ovens AMANA REFRIGERATION Inc 6 Nov 1973 [11 April 1973] 51510/73 Heading H2H A supply circuit for the magnetron 38 of a microwave oven 10 comprises an electromagnetic radiation detector 62 which supplies a signal to a control circuit 12 to disconnect a supply source 64 from the magnetron during a predetermined period of time following initial energization of the magnetron. The source 64 energizes a relay 70 via a thyristor SCR1 and bridge circuit 76 so that the relay enables the source to be connected to the supply 40 which provides heating of the magnetron filament and the magnetron anode voltage. The detector 62 is a silicon or germanium diode which detects the electromagnetic radiation and supplies a signal to an amplifier 78. When the amplified signal reaches a level sufficient to trigger a unijunction device 86, a transistor 88 is switched on thereby switching off the thyristor SCR 1 and de-energizing the relay 70 to disconnect the supply 64 from the magnetron supply 40. The relay is held de-energized for a period of time determined by the discharge of a capacitor C5 whilst the magnetron reverts from an initial unstable oscillation mode to the normal operating mode. When the unijunction device 86 becomes non-conductive due to the discharge of the capacitor C5 through a thyristor SCR2, the transistor 88 is switched off thereby allowing the thyristor SCR1 to conduct and the relay to be re-energized. The thyristor SCR2 remains conductive to prevent further triggering of the unijunction device except when the source 64 is turned on again after having been turned off.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US35027073A | 1973-04-11 | 1973-04-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1410864A true GB1410864A (en) | 1975-10-22 |
Family
ID=23375971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5151073A Expired GB1410864A (en) | 1973-04-11 | 1973-11-06 | Circuits for operating electromagnetic energy generators |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US3784781A (en) |
| JP (1) | JPS5240460B2 (en) |
| AU (1) | AU466564B2 (en) |
| BE (1) | BE807348A (en) |
| CA (1) | CA954946A (en) |
| CH (1) | CH562532A5 (en) |
| DE (1) | DE2357480A1 (en) |
| FR (1) | FR2225835B1 (en) |
| GB (1) | GB1410864A (en) |
| IT (1) | IT997742B (en) |
| NL (1) | NL7315823A (en) |
| SE (1) | SE385348B (en) |
| ZA (1) | ZA738522B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE811146A (en) * | 1973-07-18 | 1974-06-17 | ELECTROMAGNETIC OVEN FOR AUTOMATIC AND SIMULTANEOUS HEATING AT VARIOUS TEMPERATURES OF PRODUCTS OF VARIOUS NUMBER AND DIMENSIONS | |
| US3943317A (en) * | 1973-07-18 | 1976-03-09 | Matsushita Electric Industrial Company, Ltd. | Microwave oven power supply circuit |
| US3999027A (en) * | 1975-05-05 | 1976-12-21 | Chemetron Corporation | Electronic microwave oven control system and method of preparing food items therewith |
| CA1081796A (en) * | 1978-02-09 | 1980-07-15 | B. Alejandro Mackay | Controlled heating microwave ovens using different operating frequencies |
| US4245143A (en) * | 1978-04-28 | 1981-01-13 | Hitachi Heating Appliances Co., Ltd. | Microwave oven |
| FR2459721A1 (en) * | 1979-06-22 | 1981-01-16 | Jacomino Jean Marie | Automatic control of molecular reticulation of vulcanisation - of elastomers by passage through excited resonator cavity |
| US4504767A (en) * | 1982-09-07 | 1985-03-12 | Litton Systems, Inc. | Magnetron mode detector |
| SE460328B (en) * | 1988-02-02 | 1989-09-25 | Philips Norden Ab | MIKROVAAGSUGN |
| US5571439A (en) * | 1995-04-27 | 1996-11-05 | Fusion Systems Corporation | Magnetron variable power supply with moding prevention |
| WO2015099649A1 (en) * | 2013-12-23 | 2015-07-02 | Whirlpool Corporation | Interrupting circuit for a radio frequency generator |
| CN113948356B (en) * | 2021-10-14 | 2022-07-26 | 四川大学 | Magnetron anode power supply ripple mixing wireless energy-carrying communication device and method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3611027A (en) * | 1968-02-10 | 1971-10-05 | Tokyo Shibaura Electric Co | Magnetron operating circuit |
| US3752948A (en) * | 1971-10-01 | 1973-08-14 | Amana Refrigeration Inc | Magnetron starting circuit |
-
1972
- 1972-11-02 CA CA184,936A patent/CA954946A/en not_active Expired
-
1973
- 1973-04-11 US US00350270A patent/US3784781A/en not_active Expired - Lifetime
- 1973-11-06 ZA ZA738522A patent/ZA738522B/en unknown
- 1973-11-06 GB GB5151073A patent/GB1410864A/en not_active Expired
- 1973-11-07 AU AU62269/73A patent/AU466564B2/en not_active Expired
- 1973-11-13 SE SE7315351A patent/SE385348B/en unknown
- 1973-11-13 FR FR7340256A patent/FR2225835B1/fr not_active Expired
- 1973-11-14 BE BE137776A patent/BE807348A/en unknown
- 1973-11-17 DE DE2357480A patent/DE2357480A1/en active Pending
- 1973-11-19 NL NL7315823A patent/NL7315823A/xx not_active Application Discontinuation
- 1973-11-21 CH CH1637973A patent/CH562532A5/xx not_active IP Right Cessation
- 1973-11-21 IT IT53819/73A patent/IT997742B/en active
- 1973-11-22 JP JP48130823A patent/JPS5240460B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3784781A (en) | 1974-01-08 |
| DE2357480A1 (en) | 1974-10-31 |
| FR2225835A1 (en) | 1974-11-08 |
| JPS5052646A (en) | 1975-05-10 |
| CH562532A5 (en) | 1975-05-30 |
| CA954946A (en) | 1974-09-17 |
| AU466564B2 (en) | 1975-10-30 |
| BE807348A (en) | 1974-03-01 |
| JPS5240460B2 (en) | 1977-10-12 |
| IT997742B (en) | 1975-12-30 |
| NL7315823A (en) | 1974-10-15 |
| FR2225835B1 (en) | 1978-08-11 |
| ZA738522B (en) | 1974-09-25 |
| AU6226973A (en) | 1975-05-08 |
| SE385348B (en) | 1976-06-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |