GB677932A - Improvements in or relating to an oscillatory current attenuator - Google Patents
Improvements in or relating to an oscillatory current attenuatorInfo
- Publication number
- GB677932A GB677932A GB5841/50A GB584150A GB677932A GB 677932 A GB677932 A GB 677932A GB 5841/50 A GB5841/50 A GB 5841/50A GB 584150 A GB584150 A GB 584150A GB 677932 A GB677932 A GB 677932A
- Authority
- GB
- United Kingdom
- Prior art keywords
- series
- network
- field winding
- oscillatory
- power input
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B15/00—Suppression or limitation of noise or interference
- H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
677,932. Protective arrangements. GARRETT CORPORATION. March 8, 1950 [March 9, 1949], No. 5841/50. Class 38 (iv). An oscillatory current attenuator network for an electrical device (such as a series motor 10) having at least one power input lead 22, through which lead oscillatory currents tend to flow back toward the power source 17 from an inherent source of oscillatory currents within the device, the network including the power input lead 22 and at least one inductive element of the device (such as a series field winding 11b), the inductive element being positioned between the power input lead 22 and the source of oscillatory currents, for example, the brush 14. The series field winding, 11b, and a capacitor 21 forms a so-called " gamma " filter network and by the provision of a series-connected inductance 23 there is obtained, in effect, an unbalanced " T " filter in which critical impedance matching is unnecessary. The inherent resonant frequency of the gamma network must lie outside the frequency bands to be attenuated. In other embodiments are described bidirectional series motors in which two condensers are used with an inductance in series with each field winding, the inductance preferably being wound on a single toroidal core structure.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US677932XA | 1949-03-09 | 1949-03-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB677932A true GB677932A (en) | 1952-08-27 |
Family
ID=22078435
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5841/50A Expired GB677932A (en) | 1949-03-09 | 1950-03-08 | Improvements in or relating to an oscillatory current attenuator |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB677932A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2917699A (en) * | 1954-05-24 | 1959-12-15 | Havilland Propellers Ltd De | Alternators and/or associated filter networks |
US2918633A (en) * | 1955-02-23 | 1959-12-22 | Sprague Electric Co | Encased electric filter |
GB2134739A (en) * | 1983-02-03 | 1984-08-15 | Motoare Elec Interprind | Method and electric circuit for suppressing radio interference generated by apparatus and installations driven by electric motors |
-
1950
- 1950-03-08 GB GB5841/50A patent/GB677932A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2917699A (en) * | 1954-05-24 | 1959-12-15 | Havilland Propellers Ltd De | Alternators and/or associated filter networks |
US2918633A (en) * | 1955-02-23 | 1959-12-22 | Sprague Electric Co | Encased electric filter |
GB2134739A (en) * | 1983-02-03 | 1984-08-15 | Motoare Elec Interprind | Method and electric circuit for suppressing radio interference generated by apparatus and installations driven by electric motors |
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