GB1350128A - Load current control arrangements incorporating saturable reactors - Google Patents
Load current control arrangements incorporating saturable reactorsInfo
- Publication number
- GB1350128A GB1350128A GB1420071*[A GB1350128DA GB1350128A GB 1350128 A GB1350128 A GB 1350128A GB 1350128D A GB1350128D A GB 1350128DA GB 1350128 A GB1350128 A GB 1350128A
- Authority
- GB
- United Kingdom
- Prior art keywords
- windings
- current
- winding
- core
- load
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
- G05F1/32—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using magnetic devices having a controllable degree of saturation as final control devices
- G05F1/34—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using magnetic devices having a controllable degree of saturation as final control devices combined with discharge tubes or semiconductor devices
- G05F1/38—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using magnetic devices having a controllable degree of saturation as final control devices combined with discharge tubes or semiconductor devices semiconductor devices only
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
- G05F3/02—Regulating voltage or current
- G05F3/04—Regulating voltage or current wherein the variable is ac
- G05F3/06—Regulating voltage or current wherein the variable is ac using combinations of saturated and unsaturated inductive devices, e.g. combined with resonant circuit
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
1350128 Automatic current regulation V P LEPP K M SIBGATULIN and J N CHERKASOV 11 May 1971 14200/71 Heading G3X An electric load current control arrangement comprises an unbiased saturable reactor having two magnetic cores carrying respective control windings connected in series-opposition for D.C. energization by a D.C. control signal, each magnetic core also carrying one or more additional windings, the said additional winding or one of the said additional windings on each core being A.C. energizable in series-aiding connection with a corresponding winding on the other core, and switching means to disconnect from A.C. energization part of each said additional winding or all of each said one additional winding at each saturation instant of the reactor and to reconnect the disconnected said parts or windings when the A.C. energization next reverses polarity, the other said parts of the additional windings or the other said additional windings on the cores being connected to supply a load. In a basic embodiment, Fig. 1 (not shown), each core has one additional winding tapped to provide unequal-turn portions of which those having the greater number of turns are short-circuited by a change-over or tap change switch at the instant of saturation. Prior to this both windings are in series between an A.C. supply and a load which receives the no-load current of the reactor. After the saturation instant of one of the cores, the load current rises to operate the switch and flows through the lesser-turn portions for the remainder of the A.C. half cycle. At the current zero the switch resets and then operates again when the other core saturates in the next half cycle. Load current flow in the lesser-turn portions, Fig.3 (not shown) induces in the control windings currents of the same polarity irrespective of which core is saturated, Fig.4 (not shown), the arrangement being such that if the mean value of these induced currents changes from the mean value of control current set by a D.C. source connected to the control windings, then the instants of core saturation are automatically adjusted to maintain the load current at a value determined by the D.C. control current. The relationships between the number of control winding turns, the number of turns of the winding portions, the total number of winding turns, the reactor voltage, current and power gain and its time constant and speed of response are discussed. The embodiment shown in Fig.5 has cores 11, 12, D.C. control windings 8, 9 supplied by a D.C. source 10, winding portions 2, 3 and 5, 6, an A.C. source 1, a load 7 and a switch constituted by silicon controlled rectifiers 19, 20, the current in each half cycle flowing through members 2, 21, 3, 5, 20 (gate-cathode) and 6 or 6, 22, 5, 3, 19 (gate-cathode) and 2 until core 11 or 12 saturates to fire the rectifier 20 or 19 to short-circuit the portions 3, 5 The embodiment shown in Fig. 6 uses an arrangement similar to Fig. 5 to supply current to a transformer 25 which alternately switches transistors 23, 24 on and off, the load 26 being connected through these transistors and the winding portions 2, 6 to D.C. source 27. A.C. source 1 may be of low power and high frequency to produce alternate conduction of transistors 23, 24 when the rectifiers 20, 19 are alternately fired, with D.C. pulses of corresponding time and frequency to the load 26, Fig.7 (not shown).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1420071 | 1971-05-11 | ||
FR7119826A FR2139716B1 (en) | 1971-05-11 | 1971-06-01 | |
DE19712127911 DE2127911C3 (en) | 1971-06-04 | Saturation reactor |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1350128A true GB1350128A (en) | 1974-04-18 |
Family
ID=27183481
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1420071*[A Expired GB1350128A (en) | 1971-05-11 | 1971-05-11 | Load current control arrangements incorporating saturable reactors |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR2139716B1 (en) |
GB (1) | GB1350128A (en) |
-
1971
- 1971-05-11 GB GB1420071*[A patent/GB1350128A/en not_active Expired
- 1971-06-01 FR FR7119826A patent/FR2139716B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR2139716B1 (en) | 1975-02-21 |
FR2139716A1 (en) | 1973-01-12 |
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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 |