DE551755C - Electrodynamic loudspeaker with a magnet system excited by the mains - Google Patents

Electrodynamic loudspeaker with a magnet system excited by the mains

Info

Publication number
DE551755C
DE551755C DENDAT551755D DE551755DD DE551755C DE 551755 C DE551755 C DE 551755C DE NDAT551755 D DENDAT551755 D DE NDAT551755D DE 551755D D DE551755D D DE 551755DD DE 551755 C DE551755 C DE 551755C
Authority
DE
Germany
Prior art keywords
electrodynamic loudspeaker
magnet system
coil
voice coil
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
Application number
DENDAT551755D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PETER GRASSMANN FA
Original Assignee
PETER GRASSMANN FA
Publication date
Application granted granted Critical
Publication of DE551755C publication Critical patent/DE551755C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Description

Der Erfindungsgegenstand gehört zur Klasse der elektrodynamischen Lautsprecher mit vom Netz erregtem Magnetsystem, insbesondere solchen, bei welchen die elektrodynamische Spule in einem Ringspalt zwischen zentralem Elektromagnetkern und das Feld schließender Ringscheibe schwingt. Bei solchen Systemen hat man schon vorgeschlagen, die Wirkung von Schwankungen des Erregerstromes auf die jo elektrodynamische Spule dadurch auszugleichen, daß in einem besonderen, vom gleichen Netzstrom erregten magnetischen Feld eine mit der ringförmigen elektrodynamischen Spule zusammengeschaltete zweite elektrodynamische Spule vorgesehen ist.The subject of the invention belongs to the class of electrodynamic loudspeakers with from Network excited magnet system, especially those in which the electrodynamic coil in an annular gap between the central electromagnet core and the annular disc closing the field swings. In such systems, it has already been proposed that the effect of fluctuations in the excitation current on the jo electrodynamic coil to be balanced by the fact that in a particular, of the same Mains current excited a magnetic field with the annular electrodynamic coil interconnected second electrodynamic coil is provided.

Das Wesen der vorliegenden Erfindung besteht darin, daß man das die Windungen der Sprechspule durchsetzende magnetische Kraftfeld aus zwei Kraftlinienflüsse verschiedener Richtung bildet, so daß bei Schwankungen des Erregerstromes in der Sprechspule gleich große und entgegengesetzt gerichtete Spannungen induziert werden, die sich in ihrer Wirkung aufheben. Dadurch werden offensichtlich ohne Zuhilfenahme einer zweiten in einem besonderen magnetischen Feld schwingenden Spule die Schwankungen des Erregerstromes ausgeschaltet. The essence of the present invention is that the turns of the Talking coil penetrating magnetic force field from two different lines of force flows Direction forms so that the same size in the case of fluctuations in the excitation current in the speech coil and oppositely directed voltages are induced, which cancel each other out in their effect. This will be evident in a particular without the aid of a second Magnetic field oscillating coil switched off the fluctuations in the excitation current.

In den Abb. 1 und 2 sind zwei Ausführungsformen der Erfindung schematisch dargestellt.In Figs. 1 and 2, two embodiments of the invention are shown schematically.

In Abb. ι ist 1 eine Membran mit Sprechspule 2. Diese sitzt in einem Magneten, welcher aus zwei Platten 3 und 4 gebildet wird, welche durch Stäbe 5, 6 und Kern 7 verbunden sind. Die von den Erregerspulen 8 und 9 erzeugten Kraftlinienflüsse treten in Pfeilrichtung durch die Sprechspule in die Ringplatte 10 über, so daß sich die dabei in der Sprechspule 2 induzierten Spannungen gegenseitig aufheben. Die Stäbe 5 und 6 sind durch Öffnungen in der Membran ι hindurchgeführt.In Fig. 1 is a membrane with a voice coil 2. This sits in a magnet, which is formed from two plates 3 and 4, which connected by rods 5, 6 and core 7. Those generated by the excitation coils 8 and 9 Lines of force flows in the direction of the arrow through the voice coil into the ring plate 10, see above that the voltages induced in the voice coil 2 cancel each other out. the Rods 5 and 6 are passed through openings in the membrane ι.

In Abb. 2 ist wiederum 1 eine Membran mit einer im Durchmesser größeren Sprechspule 12. Der Magnetkörper besteht wiederum aus Platten 3 und 4 und Stäben 5,6, Kern 7 und Ring 11. Auf dem Kern sitzt Scheibe 13. An Stelle der zum Aufbau des Magneten verwendeten Stäbe kann in diesem Falle auch ein geschlossener Eisenmantel verwendet werden, der in Höhe der Sprechspule mit Löchern versehen ist, durch welche mit der Membran verbundene Stäbe hindurchgeführt werden.In FIG. 2, 1 is again a membrane with a speaking coil 12 of larger diameter. The magnet body in turn consists of plates 3 and 4 and rods 5, 6, core 7 and ring 11. Disk 13 sits on the core instead of the rods used to build the magnet In this case, a closed iron jacket can also be used, which is in height the voice coil is provided with holes through which connected to the membrane Rods are passed through.

Claims (4)

Patentansprüche:Patent claims: 1. Elektrodynamischer Lautsprecher mit vom Netz erregtem Magnetsystem, dadurch gekennzeichnet, daß das die Windungen der Sprechspule durchsetzende magnetische Kraftfeld aus zwei Kraftlinienüüssen verschiedener Richtung gebildet wird, so daß bei Schwankungen des Erregerstromes in der Sprechspule gleich große und entgegengesetzt gerichtete Spannungen induziert werden, die sich in ihrer Wirkung aufheben.1. Electrodynamic loudspeaker with magnet system excited by the network, thereby characterized in that the magnetic penetrating the windings of the voice coil Force field is formed from two lines of force in different directions, so that equal and opposite in the case of fluctuations in the excitation current in the speech coil directed tensions are induced, which cancel each other out in their effect. 2. Elektrodynamischer Lautsprecher nach Anspruch 1, dadurch gekennzeichnet, daß zwei Erregerspulen symmetrisch zur Sprechspule angeordnet sind, und zwar eine über und eine unter der Sprechspule.2. Electrodynamic loudspeaker according to claim 1, characterized in that two excitation coils are arranged symmetrically to the voice coil, one over and one under the voice coil. 3. Elektrodynamischer Lautsprecher nach Anspruch 1 und 2, dadurch gekennzeichnet, daß das Erregermagnetsystem aus zwei Platten besteht, die durch mehrere durch entsprechende Löcher in der Membran geführte Stäbe miteinander verbunden sind.3. Electrodynamic loudspeaker according to claim 1 and 2, characterized in that that the exciter magnet system consists of two plates, which are through several corresponding holes in the membrane guided rods are connected to one another. 4. Elektrodynamischer Lautsprecher nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die im Innern des als Topfmagnet ausgebildeten Magnetsystems befindliche Sprechspule durch Öffnungen im Topfmagnet mit der Membran verbunden ist.4. Electrodynamic loudspeaker according to claim 1 and 2, characterized in that that the speech coil located inside the magnet system designed as a pot magnet through openings in the pot magnet is connected to the membrane. Hierzu 1 Blatt Zeichnungen1 sheet of drawings
DENDAT551755D Electrodynamic loudspeaker with a magnet system excited by the mains Expired DE551755C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE551755T

Publications (1)

Publication Number Publication Date
DE551755C true DE551755C (en) 1932-06-04

Family

ID=6563162

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT551755D Expired DE551755C (en) Electrodynamic loudspeaker with a magnet system excited by the mains

Country Status (1)

Country Link
DE (1) DE551755C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1226646B (en) * 1960-11-04 1966-10-13 Dragoljub B Stojanovic Double magnet system for permanently dynamic loudspeakers
DE3614313A1 (en) * 1986-04-28 1987-11-12 Guenter Dr Ing Nuesslein Dynamic loudspeaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1226646B (en) * 1960-11-04 1966-10-13 Dragoljub B Stojanovic Double magnet system for permanently dynamic loudspeakers
DE3614313A1 (en) * 1986-04-28 1987-11-12 Guenter Dr Ing Nuesslein Dynamic loudspeaker

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