DE19633086A1 - Permanent magnet generator with variable torque e.g. bicycle dynamo - achieves continuous attenuation of magnetic flux through generator coils during operation by regulating power with varying revs. rate; flux control plate can be used without causing eddy current braking - Google Patents
Permanent magnet generator with variable torque e.g. bicycle dynamo - achieves continuous attenuation of magnetic flux through generator coils during operation by regulating power with varying revs. rate; flux control plate can be used without causing eddy current brakingInfo
- Publication number
- DE19633086A1 DE19633086A1 DE1996133086 DE19633086A DE19633086A1 DE 19633086 A1 DE19633086 A1 DE 19633086A1 DE 1996133086 DE1996133086 DE 1996133086 DE 19633086 A DE19633086 A DE 19633086A DE 19633086 A1 DE19633086 A1 DE 19633086A1
- Authority
- DE
- Germany
- Prior art keywords
- generator
- flux
- magnetic flux
- control plate
- during operation
- 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.)
- Withdrawn
Links
- 230000004907 flux Effects 0.000 title claims abstract description 15
- 230000001105 regulatory effect Effects 0.000 title abstract 2
- 230000003313 weakening effect Effects 0.000 claims description 2
- LTMHDMANZUZIPE-PUGKRICDSA-N digoxin Chemical compound C1[C@H](O)[C@H](O)[C@@H](C)O[C@H]1O[C@@H]1[C@@H](C)O[C@@H](O[C@@H]2[C@H](O[C@@H](O[C@@H]3C[C@@H]4[C@]([C@@H]5[C@H]([C@]6(CC[C@@H]([C@@]6(C)[C@H](O)C5)C=5COC(=O)C=5)O)CC4)(C)CC3)C[C@@H]2O)C)C[C@@H]1O LTMHDMANZUZIPE-PUGKRICDSA-N 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/02—Details
- H02K21/021—Means for mechanical adjustment of the excitation flux
- H02K21/022—Means for mechanical adjustment of the excitation flux by modifying the relative position between field and armature, e.g. between rotor and stator
- H02K21/023—Means for mechanical adjustment of the excitation flux by modifying the relative position between field and armature, e.g. between rotor and stator by varying the amount of superposition, i.e. the overlap, of field and armature
- H02K21/024—Radial air gap machines
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
Description
Es ist ein bekanntes Problem, daß bei Generatoren wie Fahrraddynamos, Kfz.-Lichtmaschinen, Windgeneratoren, mobilen Stromerzeugern u. ä. mit stark schwankenden Belastungszuständen eine Regelung der Leistung auf elektrischem oder elektronischem Weg schwierig und mit Verlusten behaftet ist. Ein mechanisches Getriebe - evtl. stufenlos - stellt in der Regel eine viel zu aufwendige und ebenfalls mit Verlusten und Verschleiß behaftete Lösung dar.It is a known problem that generators like Bicycle dynamos, automotive alternators, wind generators, mobile power generators u. Ä. with strongly fluctuating Load conditions a regulation of the power on electrical or electronically difficult and with losses is afflicted. A mechanical gearbox - possibly infinitely variable - usually represents a much too elaborate and also with losses and wear Solution.
Die in den Patentansprüchen angegebene Erfindung soll z. B. eine konstante Leistungsabgabe eines Fahrraddynamos ab einer bestimmten Mindestdrehzahl ermöglichen, wobei die mechanische Leistungsaufnahme bei steigender Drehzahl durch entsprechend abnehmbares Drehmoment ebenfalls nahezu konstant bleiben soll.The invention specified in the claims is intended e.g. B. a constant power output of a bicycle dynamo enable from a certain minimum speed, the mechanical power consumption increasing Speed through correspondingly removable torque also should remain almost constant.
Das Drehmoment kann durch Abschwächen des Magnetflusses in der Generator-Spule reduziert werden, wie in den Patentansprüchen erklärt.The torque can be reduced by weakening the magnetic flux be reduced in the generator coil as in the Claims explained.
Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß keine Verluste durch zusätzliche, die elektrische Leistung begrenzende Elemente auftreten. Außerdem verschwinden proportional zur Magnetfluß-Abschwächung auch noch die Ummagnetisierungsverluste im Kern der Generator-Spule.The advantages achieved with the invention are in particular in that no losses from additional that electrical power limiting elements occur. In addition, the magnetic flux attenuation disappears in proportion also the magnetic reversal losses in the core of the Generator coil.
Der für eine praktische Ausgestaltung erforderliche Stellantrieb kann in Form eines Servo-Antriebs mit zugehöriger Regelelektronik ausgeführt sein.The actuator required for practical design can be in the form of a servo drive with associated Control electronics be executed.
Eine wesentlich einfacherer Konstruktionsmöglichkeit bietet jedoch der Einsatz eines Fliehkraftreglers.Offers a much simpler design option however the use of a centrifugal governor.
Zwei Ausführungsbeispiele der Erfindung sollen die Wirkungsweise veranschaulichen und werden im folgenden näher beschrieben. Two embodiments of the invention are said Illustrate mode of action and are described below described in more detail.
Es zeigenShow it
Fig. 1 schematische Darstellung eines Generators, dessen Permanent-Magnet (1) aus dem Stator- Blechpaket (2) heraus in das Flußumleitblech (3) gezogen werden kann. Fig. 1 is a schematic representation of a generator, the permanent magnet ( 1 ) can be pulled out of the stator core ( 2 ) into the flux diverting plate ( 3 ).
Das Flußumleitblech (3) ist starr mit der Achse (4) verbunden, während sowohl der Magnet (1) als auch der Stellring (5) auf ihr axial verschiebbar sind. Magnet (1) und Stellring (5) sind miteinander durch Stäbe (6) verbunden. Diese sind durch Bohrungen im Flußumleitblech (3) geführt, wodurch auch die Drehbewegung auf Magnet (1) und Stellring (5) übertragen wird. Der Stellring (5) kann mit Hebel (7) vom Stellantrieb (8) verschoben werden.The flux diverting plate ( 3 ) is rigidly connected to the axis ( 4 ), while both the magnet ( 1 ) and the adjusting ring ( 5 ) are axially displaceable on it. Magnet ( 1 ) and adjusting ring ( 5 ) are connected to each other by rods ( 6 ). These are guided through holes in the flow diverting plate ( 3 ), whereby the rotary movement is also transmitted to the magnet ( 1 ) and adjusting ring ( 5 ). The adjusting ring ( 5 ) can be moved with the lever ( 7 ) from the actuator ( 8 ).
Fig. 2 einen Magnet-Rotor mit hochpermeablen Polplatten (9) und Flußumleitblech (3) in Kombintion mit einem Fliehkraftregler (10). Durch geeignete Formgebung der Polenden (11) erreicht man eine Kompensation der Wirkkurve des Fliehkraftreglers (10) dahingehend, daß das Leistungsprodukt aus Drehmoment und Drehzahl konstant bleibt innerhalb des Regelbereiches. Fig. 2 shows a magnetic rotor with highly permeable pole plates ( 9 ) and flux diverting plate ( 3 ) in combination with a centrifugal governor ( 10 ). A suitable shaping of the pole ends ( 11 ) compensates for the action curve of the centrifugal governor ( 10 ) in such a way that the power product of torque and speed remains constant within the control range.
Claims (2)
- - durch Herausziehen des Magneten aus dem Magnetkreis werkstoffbedingt keine Entmagnetisierung des Magneten erfolgt,
- - durch ein Flußumleitblech am Magneten keine Wirbelstrombremse entsteht, indem das Flußumleitblech mit dem Magneten mitläuft.
- - by pulling the magnet out of the magnetic circuit, the magnet does not demagnetize due to the material,
- - An eddy current brake is not created by a flux diverting plate on the magnet by the flux diverting plate running with the magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1996133086 DE19633086A1 (en) | 1996-08-16 | 1996-08-16 | Permanent magnet generator with variable torque e.g. bicycle dynamo - achieves continuous attenuation of magnetic flux through generator coils during operation by regulating power with varying revs. rate; flux control plate can be used without causing eddy current braking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1996133086 DE19633086A1 (en) | 1996-08-16 | 1996-08-16 | Permanent magnet generator with variable torque e.g. bicycle dynamo - achieves continuous attenuation of magnetic flux through generator coils during operation by regulating power with varying revs. rate; flux control plate can be used without causing eddy current braking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE19633086A1 true DE19633086A1 (en) | 1997-01-30 |
Family
ID=7802817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1996133086 Withdrawn DE19633086A1 (en) | 1996-08-16 | 1996-08-16 | Permanent magnet generator with variable torque e.g. bicycle dynamo - achieves continuous attenuation of magnetic flux through generator coils during operation by regulating power with varying revs. rate; flux control plate can be used without causing eddy current braking |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE19633086A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB641614A (en) * | 1947-11-10 | 1950-08-16 | Knut Bertil Lindblad | Improvements in or relating to the automatic control of the magnetic flux in electric generators, particularly bicycle generators |
| DE1088600B (en) * | 1958-09-09 | 1960-09-08 | Siemens Ag | Electric power generator, especially for use as an alternator |
| DE1192311B (en) * | 1963-07-11 | 1965-05-06 | Licentia Gmbh | Synchronous generator of the claw pole type |
-
1996
- 1996-08-16 DE DE1996133086 patent/DE19633086A1/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB641614A (en) * | 1947-11-10 | 1950-08-16 | Knut Bertil Lindblad | Improvements in or relating to the automatic control of the magnetic flux in electric generators, particularly bicycle generators |
| DE1088600B (en) * | 1958-09-09 | 1960-09-08 | Siemens Ag | Electric power generator, especially for use as an alternator |
| DE1192311B (en) * | 1963-07-11 | 1965-05-06 | Licentia Gmbh | Synchronous generator of the claw pole type |
Non-Patent Citations (1)
| Title |
|---|
| JP 61-150 641 A in: Patents Abstracts of Japan, Sect. E, Vol. 10 (1986), No. 352 (E-458) * |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OAV | Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1 | ||
| OP8 | Request for examination as to paragraph 44 patent law | ||
| 8122 | Nonbinding interest in granting licenses declared | ||
| 8130 | Withdrawal |