GB910812A - Improvements in or relating to compound excitation systems for rotary generators - Google Patents
Improvements in or relating to compound excitation systems for rotary generatorsInfo
- Publication number
- GB910812A GB910812A GB1779561A GB1779561A GB910812A GB 910812 A GB910812 A GB 910812A GB 1779561 A GB1779561 A GB 1779561A GB 1779561 A GB1779561 A GB 1779561A GB 910812 A GB910812 A GB 910812A
- Authority
- GB
- United Kingdom
- Prior art keywords
- current
- rectifier
- pulse
- circuit
- signal
- 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
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/38—Self-excitation by current derived from rectification of both output voltage and output current of generator
-
- 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
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/34—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using magnetic devices with controllable degree of saturation in combination with controlled discharge tube or controlled semiconductor device
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
- Control Of Charge By Means Of Generators (AREA)
Abstract
910,812. Automatic voltage control; alternators. MULLARD Ltd. May 16, 1961, No. 17795/61. Classes 35 and 38 (4). In a compound field excitation arrangement for a rotary generator, a cycling switch connected across a compounding source intermittently bleeds excitation current over a part of the load current range of the generator up to a predetermined short-circuit current, the duty-cycle of the switch being varied in dependence upon the value of the load current. In an embodiment, Fig. 8, a field 5 of a rotary generator is supplied by a voltage dependent source S 1 , not shown, and a compounding source S 2 . An intermittent bleed through a silicon controlled rectifier 21 is made by a pulse at fixed intervals from a unit 39 synchronized to a square-wave oscillator 30. The rectifier 21 is switched off by silicon controlled rectifiers 23, 24 rendered conducting by timing pulses applied in sequence. The rectifier 23 is made conductive simultaneously with the rectifier 21 by a pulse from unit 39. A commutating condenser is discharged by the rectifier 24 after a delay, determined by a signal from a magnetic amplifier MA or a delay unit 36 through an " OR " circuit 34 and pulse control 37. The magnetic amplifier MA is energized with a square-wave signal from the oscillator 30 and has a control winding 27 energized in dependence on the current-bleed and a reference winding 28 energized from a battery 29, to produce a square wave of double the oscillator frequency having a delay dependent on the current in the control winding. 27. A signal from the oscillator 30 is also fed to a monostable trigger multivibrator 36 acting as a time delay. The time-delayed signal and the signal from the magnetic amplifier are fed to the "OR" circuit whereby the first arriving pulse controls the firing time of the rectifier 24. In another embodiment, Fig. 10, for an alternator 1, a voltage-dependent excitation current is derived by a device S and fed to a field winding 5 and a compounding excitation current is fed to the field winding from a current transformer 6 through a full-wave rectifier S2. Separate intermittent current bleeding silicon controlled rectifiers 41-43 are provided for each phase controlled by separate magnetic amplifiers MA(1)-MA(3) each provided with a pulse. producing circuit 48(1)-48(3). The quenching circuit of Fig. 8 comprising rectifiers 23, 24 is not necessary since the rectifiers 41-43 are supplied with alternating current. Specification 898,281 is referred to.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1779561A GB910812A (en) | 1961-05-16 | 1961-05-16 | Improvements in or relating to compound excitation systems for rotary generators |
DE1962N0021573 DE1290236B (en) | 1961-05-16 | 1962-05-12 | Arrangement for regulating the compounding for a shunt-excited generator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1779561A GB910812A (en) | 1961-05-16 | 1961-05-16 | Improvements in or relating to compound excitation systems for rotary generators |
Publications (1)
Publication Number | Publication Date |
---|---|
GB910812A true GB910812A (en) | 1962-11-21 |
Family
ID=10101346
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1779561A Expired GB910812A (en) | 1961-05-16 | 1961-05-16 | Improvements in or relating to compound excitation systems for rotary generators |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1290236B (en) |
GB (1) | GB910812A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2142750A (en) * | 1983-06-01 | 1985-01-23 | Ansaldo Motori Spa | An excitation regulation system for alternators |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2526684C2 (en) * | 1975-06-14 | 1985-09-19 | Fried. Krupp Gmbh, 4300 Essen | Converter consisting of a direct current motor and a three-phase generator with a control device |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1259735A (en) * | 1960-06-11 | 1961-04-28 | Jack & Heintz | Static inductor current limiter for alternating current generator |
FR1259736A (en) * | 1960-06-11 | 1961-04-28 | Jack & Heintz | Static excitation limiter with regulator for alternating current generators |
-
1961
- 1961-05-16 GB GB1779561A patent/GB910812A/en not_active Expired
-
1962
- 1962-05-12 DE DE1962N0021573 patent/DE1290236B/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2142750A (en) * | 1983-06-01 | 1985-01-23 | Ansaldo Motori Spa | An excitation regulation system for alternators |
Also Published As
Publication number | Publication date |
---|---|
DE1290236B (en) | 1969-03-06 |
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