GB1245708A - Inverter - Google Patents
InverterInfo
- Publication number
- GB1245708A GB1245708A GB4937469A GB4937469A GB1245708A GB 1245708 A GB1245708 A GB 1245708A GB 4937469 A GB4937469 A GB 4937469A GB 4937469 A GB4937469 A GB 4937469A GB 1245708 A GB1245708 A GB 1245708A
- Authority
- GB
- United Kingdom
- Prior art keywords
- voltage
- pick
- electrode
- region
- excitation
- 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
- 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
- H02M11/00—Power conversion systems not covered by the preceding groups
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Oscillators With Electromechanical Resonators (AREA)
Abstract
1,245,708. Capacitive amplifiers. CESKOSLOVENSKA AKADEMIE VED. 8 Oct., 1969 [9 Oct., 1968], No. 49374/69. Heading H3B. [Also in Division H2] Relatively low D.C. voltages Em (e.g. from measuring circuits) are converted into A.C. voltages E 2K by an inverter comprising a ferroelectric disc 10 (Fig. 1), e.g. a single crystal of triglycinesulphate, in thermally autostable mode of operation and which forms a mechanical resonator when excited piezo-electrically by an A.C. voltage E 1 from a generator 2 applied between an annular excitation electrode 12 and an electrode 11. A pick-up region 103 is maintained by heat transfer from the exciting region 102 which is heated by the dielectric losses, at the temperature of the phase transition of the ferroelectric disc (Curie temp.), and is contacted by a pick-up electrode 13 and the electrode 11. In this thermal region the piezoelectric coefficient d of the pick-up region 103 depends upon the D.C. voltage Em applied between electrodes 11 and 13. With constant excitation voltage E 1 therefore, the pick-up piezo-electric output A.C. voltage E 2K magnitude is directly proportional to the magnitude of voltage Em and has a frequency equal to the 2nd harmonic of the excitation frequency. The "working point" of the disc 10 is set by an adjustable D.C. bias from a source 7. The inverter output E 2 K is amplified by an amplifier 4. The excitation frequency is adjusted to correspond to a critical frequency # 0 whereat shifts of the resonance peaks of mechanical vibration and hence of the output voltage E 2 K, in dependence upon temperature, are minimum (Fig. 2, not shown). Specification 1,049,613 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CS693368 | 1968-10-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1245708A true GB1245708A (en) | 1971-09-08 |
Family
ID=5417493
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4937469A Expired GB1245708A (en) | 1968-10-08 | 1969-10-08 | Inverter |
Country Status (4)
Country | Link |
---|---|
AT (1) | AT290675B (en) |
DE (1) | DE1950801A1 (en) |
FR (1) | FR2020121A1 (en) |
GB (1) | GB1245708A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018006964A1 (en) * | 2016-07-07 | 2018-01-11 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Device and method for actuating a load and device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3105654B1 (en) | 2019-12-18 | 2021-12-10 | Commissariat Energie Atomique | ELECTRIC CONVERTER |
-
1969
- 1969-10-07 AT AT943869A patent/AT290675B/en active
- 1969-10-07 FR FR6934110A patent/FR2020121A1/fr not_active Withdrawn
- 1969-10-08 GB GB4937469A patent/GB1245708A/en not_active Expired
- 1969-10-09 DE DE19691950801 patent/DE1950801A1/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018006964A1 (en) * | 2016-07-07 | 2018-01-11 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Device and method for actuating a load and device |
US10962997B2 (en) | 2016-07-07 | 2021-03-30 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus and method for driving a load and device |
Also Published As
Publication number | Publication date |
---|---|
AT290675B (en) | 1971-06-11 |
FR2020121A1 (en) | 1970-07-10 |
DE1950801A1 (en) | 1970-06-18 |
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