GB862656A - Improvements in or relating to control circuits for thyratrons - Google Patents
Improvements in or relating to control circuits for thyratronsInfo
- Publication number
- GB862656A GB862656A GB36641/57A GB3664157A GB862656A GB 862656 A GB862656 A GB 862656A GB 36641/57 A GB36641/57 A GB 36641/57A GB 3664157 A GB3664157 A GB 3664157A GB 862656 A GB862656 A GB 862656A
- Authority
- GB
- United Kingdom
- Prior art keywords
- control
- voltage
- amplifier
- thyratron
- grid
- 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
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/03—Arrangements for regulating or controlling the speed or torque of electric DC motors for controlling the direction of rotation of DC motors
- H02P7/05—Arrangements for regulating or controlling the speed or torque of electric DC motors for controlling the direction of rotation of DC motors by means of electronic switching
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Ac-Ac Conversion (AREA)
- Power Conversion In General (AREA)
Abstract
862,656. Control of D.C. motors. RESEARCH-COTTRELL Inc. Nov. 25, 1957 [Dec. 3, 1956], No. 36641/57. Class 38 (3). [Also in Group XXXV] A control circuit for a thyratron 10 for converting A.C. to D.C. comprises a saturable transformer 13 having a reactor winding 14 in series with a rectifier diode 16 and the grid of the thyratron, and a control winding 15 in series with an amplifier tube, both circuits being fed with a current synchronous with the supply current by windings 17, 18, whereby currents i 1 , i 2 flow in the circuits in alternate half cycles. Variation of the current i 1 by a signal voltage on the grid of the amplifier tube varies the degree of saturation of the transformer core, and dependent on this saturation the subsequent voltage pulse in the reactor circuit in the next half-cycle is absorbed to a greater or lesser degree so that the time and value of a trigger pulse E 2 on the grid of the thyratron is varied. Various biasing arrangements (Figs. 2-5, not shown) are described for the amplifier tube, which may be provided with a plate resistor, and may have two control grids to permit control by two signals. Alternatively two or more amplifier tubes may be provided in parallel or series. Positive or negative feedback from the output may be supplied to the cathode circuit of the amplifier tube. The arrangement may be utilized for a three-phase amplifier, each phase having a thyratron whose grid is controlled by a circuit as shown, the grids of the three amplifier tubes being supplied with a common D.C. signal. As shown in Figs. 13, 14, a pair of thyratrons each with a control circuit may be used to supply the field windings of a split-phase D.C. motor, a signal being applied across the grids of the amplifier tubes whose polarity determines the direction of rotation of the motor. This may be used for automatic flow control, wherein the fluid flow along a conduit 50 is controlled by a transducer 51 providing a voltage E which is added to a reference voltage F to provide a voltage G which is zero at the desired flow rate. This voltage G is fed to the arrangement of Fig. 13 the motor 40 controlling a valve 55 in the conduit. Specification 862,657 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US862656XA | 1956-12-03 | 1956-12-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB862656A true GB862656A (en) | 1961-03-15 |
Family
ID=22197393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB36641/57A Expired GB862656A (en) | 1956-12-03 | 1957-11-25 | Improvements in or relating to control circuits for thyratrons |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB862656A (en) |
-
1957
- 1957-11-25 GB GB36641/57A patent/GB862656A/en not_active Expired
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