DE651556C - Lifting magnet - Google Patents
Lifting magnetInfo
- Publication number
- DE651556C DE651556C DES115084D DES0115084D DE651556C DE 651556 C DE651556 C DE 651556C DE S115084 D DES115084 D DE S115084D DE S0115084 D DES0115084 D DE S0115084D DE 651556 C DE651556 C DE 651556C
- Authority
- DE
- Germany
- Prior art keywords
- resistance
- temperature
- magnet
- winding
- lifting magnet
- 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
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Cold Cathode And The Manufacture (AREA)
Description
Hubmagnet Die Erfindung bezieht sich auf Hubmagnete und hat eine Schaltung des Erregerstromkreises solcher Magnete zum Gegenstand, durch die erreicht wird, daß die Zugkraft des Magneten möglichst dauernd und unabhängig von äußeren Einflüssen die gleiche bleibt. Uni dieses zu erreichen, benutzt die Erfindung einen mit der Erregerwicklung des Hubmagneten in Reihe geschalteten thermon.egativen Widerstand. Der Erregerwicklung einen thermone,gativen Widerstand vorzuschalten, ist an sich bereits bekannt; jedoch benutzte man diese Schaltung bisher dazu, um ein verzögertes Anziehen des Magneten zu erreichen. Der thermonegative Vorwiderst.and mußte also so ausgelegt werden, daß er sich durch den Erregerstrom "stark erwärmte.Lifting magnet The invention relates to lifting magnets and has a circuit the excitation circuit of such magnets to the object, through which is achieved, that the pulling force of the magnet is as permanent as possible and independent of external influences remains the same. To achieve this, the invention uses one with the Excitation winding of the lifting magnet in series connected thermonegative resistance. Connecting a thermonic, negative resistor upstream of the excitation winding is inherent in itself already known; however, this circuit was previously used to generate a delayed To achieve attraction of the magnet. The thermo-negative pre-resistance had to be be designed in such a way that it "warmed up greatly" due to the excitation current.
Im Gegensatz zu dieser bekannten Anordnung wird gemäß der Erfindung durch entsprechende Bemessung und Anordnung des thermonegativen Widerstandes dafür gesorgt, daß die Temperaturänderungenin dem tIiermonegativen Widerstand die Widerstandsänderungen. der Erregerwicklung zur Verminderung der Temperaturabhängigkeit der Zugkraft ausgleichen. Das gleiche Ziel läßt sich auch mit einem thermopositiven Widerstand erreichen, und zwar wird in diesem Fall der Erregerwicklung ein konstanter, möglichst temperaturunabhängiger Widerstand vorgeschaltet, und zu beiden wird ein thermopositiver Widerstand parallel geschaltet. Außerdem wird .dem ;ganzen System von Widerständen ein dritter gemeinsamer Vorwiderstand aus temperaturunabhängigem Material vorgeschaltet: Die Erfindung .hat den Vorteil, daß die Betriebsgröße, welche die Zugkraft des Magneten bestimmt, also beispielsweise bei einem Gleichstrommagneten der Erregerstrom unabhängig von äuß,eten Temperatureinflüssen stets unverändert bleibt. Wenn die Temperatur steigt und dadurch der Widerstand der Erregerwicklung zunimmt, so wird diese Widerstandsänderung !durch den temperaturveränderlichen Widerstand ausgeglichen. Bei der Schaltung, .die einen thermopositiven Widerstand verwendet, ist die Wirkung folgende: Wenn mit oder Temperatur der Widerstand der Erregerwicklung steigt, dann erhöht sich der Gesamtwiderstand des Parallelzweiges, in dem -die Erregen#,ricklung liegt, wegen des Vorwiderstandes um seinen garingeren Anteil als der Widerstand des thermopositiven Parallelzweiges. Einem konstant bleibenden Erregerstrom entspricht also ein verminderter Gesamtstrom und damit ein verminderter Abfall im gemeinsamen Vorwiderstand.In contrast to this known arrangement, according to the invention by appropriate dimensioning and arrangement of the thermo-negative resistance for it caused the temperature changes in the animal negative resistance to reflect the resistance changes. compensate for the excitation winding to reduce the temperature dependence of the tensile force. The same goal can be achieved with a thermopositive resistor, and in this case the excitation winding becomes a constant, as temperature-independent as possible A resistor is connected upstream, and a thermopositive resistor is connected in parallel to both switched. In addition, the whole system of resistances becomes a third common one Series resistor made of temperature-independent material connected upstream: The invention .hat the advantage that the operating size, which determines the pulling force of the magnet, so For example, in the case of a direct current magnet, the excitation current is independent of the external Temperature influences always remains unchanged. When the temperature rises and through it As the resistance of the excitation winding increases, this change in resistance is due to compensated for the temperature-variable resistance. With the circuit, .the one When using thermopositive resistance, the effect is as follows: When using or temperature the resistance of the field winding increases, then the total resistance increases of the parallel branch in which -the excitation #, winding is, because of the series resistor by its smaller share than the resistance of the thermopositive parallel branch. A constant excitation current therefore corresponds to a reduced total current and thus a reduced drop in the common series resistor.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES115084D DE651556C (en) | 1934-08-16 | 1934-08-16 | Lifting magnet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES115084D DE651556C (en) | 1934-08-16 | 1934-08-16 | Lifting magnet |
Publications (1)
Publication Number | Publication Date |
---|---|
DE651556C true DE651556C (en) | 1937-10-16 |
Family
ID=7533466
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DES115084D Expired DE651556C (en) | 1934-08-16 | 1934-08-16 | Lifting magnet |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE651556C (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE765930C (en) * | 1938-03-27 | 1954-02-08 | Siemens Reiniger Werke Ag | Device for automatically keeping the emission of glow cathode discharge tubes constant, especially X-ray tubes |
DE1057236B (en) * | 1954-03-31 | 1959-05-14 | Stone J & Co Ltd | Electromagnet with temperature compensation |
DE1136778B (en) * | 1957-04-11 | 1962-09-20 | Kieninger & Obergfell | Electromagnetic drive and / or gear regulator arrangement, preferably for clocks, fed by changing direct voltage sources |
DE1150451B (en) * | 1959-01-31 | 1963-06-20 | Siemens Ag | Electrical winding with temperature compensation |
-
1934
- 1934-08-16 DE DES115084D patent/DE651556C/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE765930C (en) * | 1938-03-27 | 1954-02-08 | Siemens Reiniger Werke Ag | Device for automatically keeping the emission of glow cathode discharge tubes constant, especially X-ray tubes |
DE1057236B (en) * | 1954-03-31 | 1959-05-14 | Stone J & Co Ltd | Electromagnet with temperature compensation |
DE1136778B (en) * | 1957-04-11 | 1962-09-20 | Kieninger & Obergfell | Electromagnetic drive and / or gear regulator arrangement, preferably for clocks, fed by changing direct voltage sources |
DE1150451B (en) * | 1959-01-31 | 1963-06-20 | Siemens Ag | Electrical winding with temperature compensation |
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