EP0420885A1 - Tacho generator - Google Patents

Tacho generator

Info

Publication number
EP0420885A1
EP0420885A1 EP89906774A EP89906774A EP0420885A1 EP 0420885 A1 EP0420885 A1 EP 0420885A1 EP 89906774 A EP89906774 A EP 89906774A EP 89906774 A EP89906774 A EP 89906774A EP 0420885 A1 EP0420885 A1 EP 0420885A1
Authority
EP
European Patent Office
Prior art keywords
coil
pole pairs
turns
windings
generator according
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.)
Pending
Application number
EP89906774A
Other languages
German (de)
French (fr)
Inventor
Adelbert Schalk
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.)
Deutsche Thomson Brandt GmbH
Original Assignee
Deutsche Thomson Brandt GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Deutsche Thomson Brandt GmbH filed Critical Deutsche Thomson Brandt GmbH
Publication of EP0420885A1 publication Critical patent/EP0420885A1/en
Pending legal-status Critical Current

Links

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
    • H02K21/48—Generators with two or more outputs
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • 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
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/14—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with speed sensing devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/26—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors consisting of printed conductors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S310/00—Electrical generator or motor structure
    • Y10S310/06—Printed-circuit motors and components

Definitions

  • servo-controlled motors For driving a head drum e.g. in video recorders, servo-controlled motors are known which are equipped with one or more tachogenerators according to the preamble of claim 1.
  • the meandering turns and also the associated pole pairs in the rotor are aligned radially.
  • a signal with a frequency dependent on the speed is generated in the coil formed by the meandering arrangement of the individual turns.
  • This signal is evaluated in the servo system of the device in order to derive a readjustment for the speed control of the motor.
  • known systems have a so-called pick-up pulse generator, by means of which one or more switching pulses are generated with each rotor revolution. These pulses are used for synchronous control between the recorded signal and the sequence control in the device.
  • the tachometer generator in principle, different signals are generated with only one generator by the action of azimuth angles - both in the stator part and in the rotor part. While in one generator part, in which the meandering turns of a first coil z. B. are inclined by +45 with respect to a point on the coil diameter, a frequency is generated for the regulation of the motor speed, the pick-up im pulses are generated in a second coil, the meandering turns of which are inclined, for example, by -45. Both coils have the same mean winding diameter.
  • the arrangement of the pole pairs in the rotating part i.e. their number and direction must correspond to the arrangement of the coils.
  • This is achieved in a magnetization process of the magnetic disk by a single pole pair, which can be positioned accordingly via a rotary adjuster.
  • the existing magnetization is overwritten at certain intervals which correspond to the arrangement of the mantans of the second coil.
  • FIG. 1 shows an arrangement of the meandering windings in one plane for two coils with an azimuth offset
  • FIG. 2 shows an arrangement corresponding to FIG. 1 for a higher frequency generator amplitude
  • FIG. 3 shows an arrangement of the magnetization of the
  • FIG. 4 shows the spatial association of the meandering windings with the magnetic disk
  • FIG. 5 shows in a detail the course of the signals generated in the coils.
  • Fig. 1 shows an arrangement of the meandering turns in one plane for two coils with azimuth offset.
  • the coils 2 and 3 are circular z. B. executed as printed conductor tracks.
  • the Spu len are interleaved and have a common connection point A.
  • the coil 2 serves as a frequency generator.
  • Their meandering turns are made at an angle +, relative to a point on the center line 4.
  • the individual turns are connected in series.
  • the point S2 forms the connection for this coil.
  • the coil 3 is provided for the generation of pick-up signals.
  • the individual meandering turns are made at an angle of -.
  • the connection point for this coil is S3.
  • two coils nested one inside the other are shown.
  • it is also possible to arrange further coils on the circumference o for example for the generation of further pick-up signals.
  • Fig. 2 shows an arrangement corresponding to Fig.l.
  • a higher frequency generator amplitude is achieved by a modified coil 2.
  • Several individual pulses can be tapped at the connections B1 to BIO of coil 3.
  • a printed circuit board designed in double-sided lamination the thickness of which should be as small as possible, it is possible to carry out the coil 2 on one side of the plate continuously, that is to say without interruption through the coil 3, while on the the other side of the plate is the coil 3.
  • FIG. 3 shows an arrangement of the magnetization of the magnetic disk in association with FIG. 1.
  • the magnetic disk 5 is designed as a circular ring. It is coupled to the rotating part of the motor by a connection, not shown. As shown in FIG. 4, the magnetic disk 5 is arranged centrically at a short distance from the fixed circuit board in order to generate the largest possible signal level in the coils when the disk rotates.
  • the geometrical arrangement of the pole pairs N, S shown corresponds to the arrangement of the turns of FIG. 1. The majority of the - -
  • Pole pairs are arranged at an angle of +, while 5 pole pairs are at an angle of -. If the rotor turns, the 5 magnetic pole pairs and the associated meandering turns of coil 3 are directly opposite each other once. Individual voltages are induced in each of these turns according to the law of induction, so that 5 times the voltage of a single turn is present at connection S3 of coil 3. When the rotor or the magnetic disk continues to rotate, on the other hand, only a small voltage is induced in coil 3 by the azimuth pole pairs for the frequency generator, from which the desired pick-up pulses clearly stand out.
  • FIG. 5 a shows the voltage U of the signals of the frequency generator, that is to say of coil 2, over time t, while the pick-up signals generated in coil 3 are shown in FIG. 5 b.
  • a further possibility for generating frequency generator signals as well as pick-up signals by means of nested coils with the same coil diameter and the same orientation of the individual meandering turns of the coils is to create the turns for the pick-up coil and their Associate associated magnetic pole pairs with different pitches within the frequency generator coil together with associated magnetic pole pairs.
  • the pitch for the pick-up coil is selected such that with an even number of turns, half of the turns have the pitch of the frequency generator, whereas the second half has an arrangement offset by half a pitch. It is thereby achieved that at a certain position of the magnetic disk in relation to the pick-up coil, corresponding voltages are induced in the individual turns by the associated magnetic pole pairs, which voltages generate a pulse per revolution by addition.
  • the magnetic pole pairs of the frequency generator in the windings of the pick-up coil Since the division in the frequency generator is constant, by the magnetic pole pairs of the frequency generator in the windings of the pick-up coil generate an equal number of in-phase and out-of-phase voltages which, when added together, cancel each other out. It is also possible, by designing the arrangement of the magnetic pole pairs, to generate two or more pulses in the pick-up coil during one revolution.
  • FIG. 6 shows an arrangement of the meandering turns in one plane together with the associated magnetic disk for two coils without an azimuth offset.
  • FIG. 7 shows in a detail the assignment of the magnetic pole pairs to the turns of the coils 6 and 7.
  • FIG. 6 shows on the left an arrangement of the meandering windings in one plane for two coils with the same coil diameter without an azimuth offset.
  • the coils 6 and 7 are circular, for example as a printed conductor track.
  • the coils are interleaved and have a common connection point A.
  • the coil 6 serves as a frequency generator. Their meandering turns are connected in series and have cutouts in which the coil 7 is arranged.
  • Point S2 forms the connection for coil 6.
  • the coil 7 is provided for the generation of pick-up signals.
  • the connection point for this coil is S3. While coil 6 has many turns with a constant pitch for the frequency generator, the pitch for the six turns of coil 7 is different.
  • the individual windings are labeled clockwise with 7a to 7f.
  • the windings of this coil are placed in such a way that the division of the windings 7a, 7c and 7e with the division of the windings conditions for the frequency generator match, while the windings 7b, 7d and 7f are offset by half a pitch.
  • This arrangement means that the magnetic pole pairs of the sequence generator induce winding voltages in the individual turns of the pick-up coil, and they cancel each other out in their addition. No voltage is thus generated by the magnetic pole pairs of the frequency generator in the coil 7.
  • the magnetic pole pairs assigned to the windings of the pick-up coil for the pick-up generator as shown in FIG.
  • FIG. 7 shows a detail of the assignment of the magnetic pole pairs to the turns of the coils 6 and 7.
  • the drawn position of the magnetic disk therefore corresponds to the state in which all six pick-up magnetic pole pairs are above the associated meandering turns of coil 7.
  • the individual winding voltages are therefore in phase and add up to a pick-up pulse.

Landscapes

  • Power Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Windings For Motors And Generators (AREA)
  • Brushless Motors (AREA)
  • Dc Machiner (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Physical Deposition Of Substances That Are Components Of Semiconductor Devices (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Control Of Electric Motors In General (AREA)
  • Holo Graphy (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

A servo controlled motor has an annular coil arrangement with meander-shaped windings and an annular arrangement of magnetic pole pairs, positioned for concentric relative rotation. A first coil is formed by a first number of the windings aligned at a first angle and with consistent pitch relative to a diameter line. A first number of pole pairs are aligned at the first angle and correspond in number and pitch to the first number of windings. A second coil is formed by a second number of windings. The second number of windings is aligned at a second angle relative to the diameter line. A second number of the pole pairs are aligned at the second angle and correspond in number and pitch to the second number of windings. Voltages are induced in the second coil by the second, but not by the first, number of pole pairs. Alternatively, the first number of windings define a grid of winding positions. A second coil is formed by a second number of windings aligned at the first angle. Some of the second number of windings are disposed in winding positions and others are offset from winding positions. A second number of the pole pairs aligned substantially at the first angle correspond in number and relative position to the second number of windings. Voltages induced in the second number of windings by the first number of pole pairs substantially cancel out, but voltages induced by the second number of pole pairs add together.

Description

- 4 - - 4 -
TachogeneratorTachometer generator
Für den Antrieb einer Kopftrommel z.B. bei Videorecordern sind servogesteuerte Motore bekannt, die mit einem oder meh¬ reren Tachogeneratoren nach dem Oberbegriff von Anspruch 1 ausgerüstet sind. Die mäanderförmigen Windungen und auch die zugehörigen Polpaare im Rotor sind radial ausgerichtet. Wäh¬ rend der Rotation wird in der durch die mäanderförmige Anord¬ nung der einzelnen Windungen ausgebildeten Spule ein Signal mit einer von der Drehzahl abhängigen Frequenz erzeugt. Die¬ ses Signal wird im Servosystem des Gerätes ausgewertet um daraus eine Nachsteuerung für die DrehzahlSteuerung des Mo¬ tors abzuleiten. Zusätzlich weisen bekannte Systeme einen sogenannten Pick-up-Pulse-Generator auf, durch den ein oder mehrere Umschaltimpulse bei jeder Rotorumdrehung erzeugt wer¬ den. Diese Impulse dienen der synchronen Steuerung zwischen dem aufgezeichneten Signal und der Ablaufsteuerung im Gerät.For driving a head drum e.g. in video recorders, servo-controlled motors are known which are equipped with one or more tachogenerators according to the preamble of claim 1. The meandering turns and also the associated pole pairs in the rotor are aligned radially. During the rotation, a signal with a frequency dependent on the speed is generated in the coil formed by the meandering arrangement of the individual turns. This signal is evaluated in the servo system of the device in order to derive a readjustment for the speed control of the motor. In addition, known systems have a so-called pick-up pulse generator, by means of which one or more switching pulses are generated with each rotor revolution. These pulses are used for synchronous control between the recorded signal and the sequence control in the device.
Es ist Aufgabe der Erfindung, mit nur einer Generatoranord¬ nung die erforderlichen Steuersignale zu erzeugen.It is an object of the invention to generate the necessary control signals with only one generator arrangement.
Diese Aufgabe wird gemäß der Erfindung durch im Anspruch 1 oder 2 aufgeführten Merkmale gelöst. Weiterbildungen der Er¬ findung sind in den abhängigen Unteransprüchen gekennzeich¬ net.This object is achieved according to the invention by features listed in claim 1 or 2. Further developments of the invention are characterized in the dependent subclaims.
Im Prinzip werden bei dem erfindungsgemäßen Tachogenerator nach Anspruch 1 durch die Wirkung von Azimutwinkeln -sowohl im Statorteil als auch im Rotorteil- unterschiedliche Signa¬ le mit nur einem Generator erzeugt. Während in dem einen Ge¬ neratorteil, bei dem die mäanderförmigen Windungen einer er¬ sten Spule z. B. um +45 gegenüber einem Punkt auf dem Spu¬ lendurchmesser geneigt sind, eine Frequenz für die Regelung der Motorgeschwindigkeit erzeugt wird, können die Pick-up-Im- pulse in einer zweiten Spule, deren mäanderförmige Windungen z.B. um -45 geneigt sind, erzeugt werden. Beide Spulen wei¬ sen den gleichen mittleren Windungsdurchmesser auf.In principle, in the tachometer generator according to the invention, different signals are generated with only one generator by the action of azimuth angles - both in the stator part and in the rotor part. While in one generator part, in which the meandering turns of a first coil z. B. are inclined by +45 with respect to a point on the coil diameter, a frequency is generated for the regulation of the motor speed, the pick-up im pulses are generated in a second coil, the meandering turns of which are inclined, for example, by -45. Both coils have the same mean winding diameter.
Die Anordnung der Polpaare im rotierenden Teil d.h. deren Zahl und Richtung muß der Anordnung der Spulen entsprechen. Dieses wird bei einem Magnetisierungsvorgang der Magnetschei¬ be durch ein Einzelpolpaar erreicht, welches über einen Dreh¬ versteller entsprechend positioniert werden kann. So wird z.B. zunächst die Magnetisierung für die Drehzahlregelung, also für den Frequenzgenerator durchgeführt, in dem über den gesamten Umfang Polpaare mit +45 auf agnetisiert werden. In einem zweiten Magnetisierungsvorgang mit dem auf -45 ausge¬ richteten Einzelpolpaar wird die bestehende Magnetisierung in bestimmten Abständen, die der Anordnung der Mänander der zweiten Spule entsprechen, überschrieben.The arrangement of the pole pairs in the rotating part i.e. their number and direction must correspond to the arrangement of the coils. This is achieved in a magnetization process of the magnetic disk by a single pole pair, which can be positioned accordingly via a rotary adjuster. For example, First the magnetization for the speed control, i.e. for the frequency generator, is carried out, in which pole pairs with +45 are agnetized over the entire circumference. In a second magnetization process with the single pole pair oriented at -45, the existing magnetization is overwritten at certain intervals which correspond to the arrangement of the mantans of the second coil.
Im folgenden soll die Erfindung gemäß Anspruch 1 und den zu¬ geordneten Unteransprüchen anhand eines Ausführungsbeispie¬ les näher erläutert werden: Fig. 1 zeigt eine Anordnung der mäanderförmigen Windungen in einer Ebene für zwei Spulen mit Azimutwinkelversatz, Fig. 2 zeigt eine Anordnung entsprechend Fig.l für eine höhe¬ re Frequenzgeneratoramplitude, Fig. 3 zeigt eine Anordnung der Magnetisierung derThe invention according to claim 1 and the associated subclaims is to be explained in more detail below with the aid of an exemplary embodiment: FIG. 1 shows an arrangement of the meandering windings in one plane for two coils with an azimuth offset, FIG. 2 shows an arrangement corresponding to FIG. 1 for a higher frequency generator amplitude, FIG. 3 shows an arrangement of the magnetization of the
Magnetscheibe in Zuordnung zu Fig. 1, Fig. 4 zeigt die räumliche Zuordnung der mäanderförmigen Win¬ dungen zur Magnetscheibe, Fig. 5 zeigt in einem Ausschnitt den Verlauf der in den Spulen erzeugten Signale.Magnetic disk in association with FIG. 1, FIG. 4 shows the spatial association of the meandering windings with the magnetic disk, FIG. 5 shows in a detail the course of the signals generated in the coils.
Fig. 1 zeigt eine Anordnung der mäanderförmigen Windungen in einer Ebene für zwei Spulen mit Azimutwinkelversatz. Auf ei¬ ner gemeinsamen Grundplatte 1 sind die Spulen 2 und 3 kreis¬ förmig z. B. als gedruckte Leiterbahnen ausgeführt. Die Spu- len sind ineinander verschachtelt und haben einen gemeinsa¬ men Anschlußpunkt A. Die Spule 2 dient als Frequenzgenera¬ tor. Ihre mäanderförmigen Windungen sind unter einem Winkel +, bezogen auf einen Punkt der Mittellinie 4, ausgeführt. Die einzelnen Windungen sind in Reihe geschaltet. Den An¬ schluß für diese Spule bildet der Punkt S2. Die Spule 3 ist für die Erzeugung von Pick-up-Signalen vorgesehen. Die ein¬ zelnen mäanderförmigen Windungen sind unter einem Winkel von - ausgeführt. Der Anschlußpunkt für diese Spule ist S3. Im vorliegenden Beispiel sind zwei ineinander verschachtelte Spulen dargestellt. Es ist aber auch möglich, weitere Spulen z.B. für die Erzeugung weiterer Pick-up-Signale auf dem Kreisumfango anzuordnen.Fig. 1 shows an arrangement of the meandering turns in one plane for two coils with azimuth offset. On a common base plate 1, the coils 2 and 3 are circular z. B. executed as printed conductor tracks. The Spu len are interleaved and have a common connection point A. The coil 2 serves as a frequency generator. Their meandering turns are made at an angle +, relative to a point on the center line 4. The individual turns are connected in series. The point S2 forms the connection for this coil. The coil 3 is provided for the generation of pick-up signals. The individual meandering turns are made at an angle of -. The connection point for this coil is S3. In the present example, two coils nested one inside the other are shown. However, it is also possible to arrange further coils on the circumference o, for example for the generation of further pick-up signals.
Fig. 2 zeigt eine Anordnung entsprechend Fig.l. Durch eine modifizierte Spule 2 wird eine höhere Frequenzgeneratorampli¬ tude erreicht. An den Anschlüssen Bl bis BIO von Spule 3 kön¬ nen mehrere Einzelimpulse abgegriffen werden. In einer anderen nicht dargestellten Ausführungsform mit ei¬ ner in doppelseitiger Kaschierung ausgeführten Leiterplatte, deren Dicke möglichst gering sein sollte, ist es möglich, auf der einen Seite der Platte die Spule 2 durchgehend, also ohne Unterbrechung durch Spule 3 auszuführen, während sich auf der anderen Seite der Platte die Spule 3 befindet.Fig. 2 shows an arrangement corresponding to Fig.l. A higher frequency generator amplitude is achieved by a modified coil 2. Several individual pulses can be tapped at the connections B1 to BIO of coil 3. In another embodiment, not shown, with a printed circuit board designed in double-sided lamination, the thickness of which should be as small as possible, it is possible to carry out the coil 2 on one side of the plate continuously, that is to say without interruption through the coil 3, while on the the other side of the plate is the coil 3.
Fig. 3 zeigt eine Anordnung der Magnetisierung der Magnet¬ scheibe in Zuordnung zu Fig. 1. Die Magnetscheibe 5 ist als Kreisring ausgeführt. Sie ist mit dem rotierenden Teil des Motors durch eine nichtdargestellte Verbindung gekuppelt. Die Magnetscheibe 5 ist -wie in Fig. 4 gezeigt- zentrisch mit geringem Abstand zu der feststehenden Leiterplatte ange¬ ordnet, um bei Rotation der Scheibe einen möglichst großen Signalpegel in den Spulen zu erzeugen. Die eingezeichneten Polpaare N, S, entsprechen in ihrer geometrischen Anordnung der Anordnung der Windungen von Fig. 1. Die Mehrzahl der - -3 shows an arrangement of the magnetization of the magnetic disk in association with FIG. 1. The magnetic disk 5 is designed as a circular ring. It is coupled to the rotating part of the motor by a connection, not shown. As shown in FIG. 4, the magnetic disk 5 is arranged centrically at a short distance from the fixed circuit board in order to generate the largest possible signal level in the coils when the disk rotates. The geometrical arrangement of the pole pairs N, S shown corresponds to the arrangement of the turns of FIG. 1. The majority of the - -
Polpaare ist unter einem Winkel von + angeordnet, während 5 Polpaare den Winkel von - aufweisen. Dreht sich der Rotor, so liegen sich einmal pro Umdrehung die 5 Magnetpolpaare und die zugehörigen mäanderförmigen Windungen von Spule 3 direkt gegenüber. In jeder dieser Windungen werden nach dem Indukti¬ onsgesetz Einzelspannungen induziert, so daß an Anschluß S3 von Spule 3 die 5-fache Spannung einer einzelnen Windung an¬ steht. Bei Weiterdrehen des Rotors bzw. der Magnetscheibe wird dagegen in Spule 3 durch die mit Azimut versehenen Polpaare für den Frequenzgenerator nur eine geringe Spannung induziert, von denen sich die gewünschten Pick-up-Impulse deutlich abheben.Pole pairs are arranged at an angle of +, while 5 pole pairs are at an angle of -. If the rotor turns, the 5 magnetic pole pairs and the associated meandering turns of coil 3 are directly opposite each other once. Individual voltages are induced in each of these turns according to the law of induction, so that 5 times the voltage of a single turn is present at connection S3 of coil 3. When the rotor or the magnetic disk continues to rotate, on the other hand, only a small voltage is induced in coil 3 by the azimuth pole pairs for the frequency generator, from which the desired pick-up pulses clearly stand out.
Der Verlauf der in den Spulen 2 und 3 erzeugten Signale ist in Fig. 5 dargestellt. Fig. 5a zeigt über der Zeit t die Spannung U der Signale des Frequenzgenerators, also von Spu¬ le 2, während in Fig. 5b die Pick-up-Signale, erzeugt in Spu¬ le 3, dargestellt sind.The course of the signals generated in the coils 2 and 3 is shown in FIG. 5. FIG. 5 a shows the voltage U of the signals of the frequency generator, that is to say of coil 2, over time t, while the pick-up signals generated in coil 3 are shown in FIG. 5 b.
Eine weitere Möglichkeit, mittels ineinander verschachtelter Spulen mit gleichem Spulendurchmesser bei gleicher Ausrich¬ tung der einzelnen mäanderförmigen Windungen der Spulen so¬ wohl Frequenzgeneratorsignale als auch Pick-up-Signale zu erzeugen, besteht darin, die Windungen für die Pick-up-Spule und deren zugehörige Magnetpolpaare mit unterschiedlicher Teilung innerhalb der Frequenzgeneratorspule nebst zugehöri¬ ger Magnetpolpaare einzuordnen. Die Teilung für die Pick-up- Spule ist derart gewählt, daß bei gerader Windungszahl die eine Hälfte der Windungen die Teilung des Frequenzgenerators aufweist, wogegen die zweite Hälfte eine um eine halbe Tei¬ lung versetzte Anordnung aufweist. Dadurch wird erreicht, daß bei einer bestimmten Stellung der Magnetscheibe zur Pick-up-Spule von den zugehörigen Magnetpolpaaren gleichpha¬ sige Spannungen in den einzelnen Windungen induziert werden, die durch Addition einen Impuls pro Umdrehung erzeugen. Da die Teilung im Frequenzgenerator konstant ist, werden durch die Magnetpolpaare des Frequenzgenerators in den Windungen der Pick-up-Spule eine gleichgroße Zahl von gleich- und ge- genphasigen Spannungen erzeugt, die sich in ihrer Addition gegeneinander aufheben. Auch ist es möglich, durch Auslegung der Anordnung der Magnetpolpaare zwei oder mehrere Impulse während einer Umdrehung in der Pick-up-Spule zu erzeugen.A further possibility for generating frequency generator signals as well as pick-up signals by means of nested coils with the same coil diameter and the same orientation of the individual meandering turns of the coils is to create the turns for the pick-up coil and their Associate associated magnetic pole pairs with different pitches within the frequency generator coil together with associated magnetic pole pairs. The pitch for the pick-up coil is selected such that with an even number of turns, half of the turns have the pitch of the frequency generator, whereas the second half has an arrangement offset by half a pitch. It is thereby achieved that at a certain position of the magnetic disk in relation to the pick-up coil, corresponding voltages are induced in the individual turns by the associated magnetic pole pairs, which voltages generate a pulse per revolution by addition. Since the division in the frequency generator is constant, by the magnetic pole pairs of the frequency generator in the windings of the pick-up coil generate an equal number of in-phase and out-of-phase voltages which, when added together, cancel each other out. It is also possible, by designing the arrangement of the magnetic pole pairs, to generate two or more pulses in the pick-up coil during one revolution.
Im folgenden soll anhand eines Ausführungsbeispiels diese Art der Signalerzeugung aufgezeigt werden.This type of signal generation is to be shown below using an exemplary embodiment.
Figur 6 zeigt eine Anordnung der mäanderförmigen Windungen in einer Ebene nebst zugehöriger Magnetscheibe für zwei Spulen ohne Azimutversatz.FIG. 6 shows an arrangement of the meandering turns in one plane together with the associated magnetic disk for two coils without an azimuth offset.
Figur 7 zeigt in einem Ausschnitt die Zuordnung der Magnet¬ polpaare zu den Windungen der Spulen 6 und 7.FIG. 7 shows in a detail the assignment of the magnetic pole pairs to the turns of the coils 6 and 7.
Figur 6 zeigt links eine Anordnung der mäanderförmigen Win¬ dungen in einer Ebene für zwei Spulen mit gleichem Spulen¬ durchmesser ohne Azimutversatz. Auf einer gemeinsamen Grund¬ platte 1 sind die Spulen 6 und 7 kreisförmig z.B. als ge¬ druckte Leiterbahn ausgeführt. Die Spulen sind ineinander verschachtelt und haben einen gemeinsamen Anschlußpunkt A. Die Spule 6 dient als Frequenzgenerator. Ihre mäanderförmi¬ gen Windungen sind in Reihe geschaltet und weisen Aussparun¬ gen auf, in denen die Spule 7 angeordnet ist. Den Anschluß für Spule 6 bildet der Punkt S2. Die Spule 7 ist für die Er¬ zeugung von Pick-up-Signalen vorgesehen. Der Anschlußpunkt für diese Spule ist S3. Während Spule 6 für den Frequenzgene¬ rator viele Windungen mit einer konstanten Teilung aufweist, ist die Teilung für die sechs Windungen von Spule 7 unter¬ schiedlich ausgeführt. Die einzelnen Windungen sind im Uhr¬ zeigersinn mit 7a bis 7f beschriftet. Es ist zu erkennen, daß die Windungen dieser Spule so gelegt sind, daß die Tei¬ lung der Windungen 7a, 7c und 7e mit der Teilung der Windun- gen für den Frequenzgenerator übereinstimmen, während die Windungen 7b, 7d und 7f um eine halbe Teilung versetzt sind. Diese Anordnung bedeutet, daß die Magnetpolpaare des Ere- quenzgenerators in den einzelnen Windungen der Pick-up-Spule WindungsSpannungen induzieren, iie sich in ihrer Addition gegenseitig aufheben. Es wird also von den Magnetpolpaaren des Frequenzgenerators in der Spule 7 keine Spannung er¬ zeugt. Demgegenüber weisen die in ihrer Anordnung den Windun¬ gen der Pick-up-Spule zugeordneten Magnetpolpaare für den Pick-up-Generator, wie in Figur 6 rechts dargestellt, eben¬ falls drei um eine halbe Teilung versetzte Magnetpolpaare auf, so daß bei einer vorbestimmten Stellung der Magnetschei¬ be während einer Umdrehung in allen sechs Windungen der Pick-up-Spule gleichphasige Spannungen induziert werden, die in ihrer Addition einen Pick-up-Impuls mit großer Amplitude ergeben.FIG. 6 shows on the left an arrangement of the meandering windings in one plane for two coils with the same coil diameter without an azimuth offset. On a common base plate 1, the coils 6 and 7 are circular, for example as a printed conductor track. The coils are interleaved and have a common connection point A. The coil 6 serves as a frequency generator. Their meandering turns are connected in series and have cutouts in which the coil 7 is arranged. Point S2 forms the connection for coil 6. The coil 7 is provided for the generation of pick-up signals. The connection point for this coil is S3. While coil 6 has many turns with a constant pitch for the frequency generator, the pitch for the six turns of coil 7 is different. The individual windings are labeled clockwise with 7a to 7f. It can be seen that the windings of this coil are placed in such a way that the division of the windings 7a, 7c and 7e with the division of the windings conditions for the frequency generator match, while the windings 7b, 7d and 7f are offset by half a pitch. This arrangement means that the magnetic pole pairs of the sequence generator induce winding voltages in the individual turns of the pick-up coil, and they cancel each other out in their addition. No voltage is thus generated by the magnetic pole pairs of the frequency generator in the coil 7. In contrast, the magnetic pole pairs assigned to the windings of the pick-up coil for the pick-up generator, as shown in FIG. 6 on the right, also have three magnetic pole pairs offset by half a pitch, so that at a predetermined one Position of the magnetic disk be induced during one revolution in all six turns of the pick-up coil, in-phase voltages which, when added, result in a pick-up pulse with a large amplitude.
Figur 7 zeigt in einem Ausschnitt die Zuordnung der Magnet¬ polpaare zu den Windungen der Spulen 6 und 7. Es sind von Spule 7 aus Figur 6 die Windungen 7e und 7f dargestellt. Wäh¬ rend das über Windung 7e gezeichnete Magnetpolpaar ebenso wie die Windung 7e im Raster der Teilung tfg des Frequenzge¬ nerators liegt, ist die Windung 7f mit dem zugehörigen Ma¬ gnetpolpaar um eine halbe Teilung = tfg + tfg:2 versetzt. Die gezeichnete Stellung der Magnetscheibe entspricht daher dem Zustand, in welchem alle sechs Pick-up-Magentpolpaare über den zugehörigen Mäanderwindungen von Spule 7 stehen. Die einzelnen WindungsSpannungen sind also phasengleich und addieren sich zu einem Pick-up-Impuls. FIG. 7 shows a detail of the assignment of the magnetic pole pairs to the turns of the coils 6 and 7. The turns 7e and 7f of the coil 7 from FIG. 6 are shown. While the magnetic pole pair drawn over winding 7e, like the winding 7e, lies in the grid of the division tfg of the frequency generator, the winding 7f with the associated magnetic pole pair is offset by half a division = tfg + tfg: 2. The drawn position of the magnetic disk therefore corresponds to the state in which all six pick-up magnetic pole pairs are above the associated meandering turns of coil 7. The individual winding voltages are therefore in phase and add up to a pick-up pulse.

Claims

- - - -
P a t e n t a n s p r ü c h eP a t e n t a n s r u c h e
Tachogenerator für einen servogesteuerten Motor, mit einer in einem Kreisring angeordneten, mäanderförmigen Windungen aufweisenden, feststehenden flachen Spulenan¬ ordnung und mit einer zentrisch über der Spulenanord¬ nung in geringem Abstand rotierenden, Magnetpolpaare aufweisenden Magnetscheibe, dadurch gekennzeichnet, daß:Tachogenerator for a servo-controlled motor, with a fixed flat coil arrangement arranged in a circular ring, with meandering windings, and with a magnetic disc rotating in the center above the coil arrangement and having a small distance and having magnetic pole pairs, characterized in that:
a) die Mehrzahl der Windungen eine, einen mittleren Spu¬ lendurchmesser aufweisende erste Spule (2) bilden, de¬ ren mäanderförmige Windungen unter einem ersten Winkel mit gleichmäßiger Teilung zum Kreisdurchmesser (4) aus¬ gerichtet sind, und daß eine der Teilung und der Zahl der Mäander zugeordnete erste Zahl von Polpaaren (N,S) der Magnetscheibe (5) in Richtung dieser Mäander ausge¬ richtet ist.a) the majority of the turns form a first coil (2) having an average coil diameter, whose meandering turns are aligned at a first angle with a uniform pitch to the circle diameter (4), and that one of the pitch and the Number of meanders assigned first number of pole pairs (N, S) of the magnetic disk (5) is oriented in the direction of these meanders.
b) eine Windung oder mehrere über den Kreisumfang ver¬ teilte Windungen mit dem mittleren Durchmesser der er¬ sten Spule (2) eine zweite Spule (3) bilden, deren mäan¬ derförmige Windungen unter einem zweiten Winkel zum Kreisdurchmesser (4) ausgerichtet sind und daß eine der Zahl und Teilung der Windungen der zweiten Spule (3) zugeordnete zweite Zahl von Polpaaren der Magnetscheibe (5) in Richtung dieser Mäander ausgerichtet ist, wobei die Verteilung der zweiten Polpaare am Umfang derart ausgebildet ist, daß an einer vorbestimmten Stellung der Magnetscheibe (5) während einer Umdrehung in den einzelnen Windungen der zweiten Spule (3) Spannungen durch die zweiten Polpaareinduziert werden.b) one turn or a plurality of turns distributed over the circumference with the average diameter of the first coil (2) form a second coil (3), the meandering turns of which are aligned at a second angle to the circle diameter (4) and that one of the number and division of the turns of the second coil (3) assigned second number of pole pairs of the magnetic disc (5) is oriented in the direction of these meanders, the distribution of the second pole pairs on the circumference being such that, at a predetermined position of the magnetic disk (5) during one revolution in the individual turns of the second coil (3), voltages are induced by the second pole pairs become.
2. Tachogenerator für einen servogesteuerten Motor, mit einer in einem Kreisring angeordneten, mäanderförmige Windungen aufweisenden, feststehenden flachen Spulenan¬ ordnung und mit einer zentrisch über der Spulenanord¬ nung in geringem Abstand rotierenden, Magnetpolpaare aufweisenden Magnetscheibe, dadurch gekennzeichnet, daß:2. Tachogenerator for a servo-controlled motor, with a fixed flat coil arrangement arranged in a circular ring, with meandering windings, and with a magnetic disc rotating at a small distance centrally above the coil arrangement, characterized in that:
a) die Mehrzahl der Windungen eine einen mittleren Spu¬ lendurchmesser aufweisende erste Spule (6) bilden, de¬ ren mäanderförmige Windungen unter einem ersten Winkel mit gleichmäßiger Teilung zum Kreisdurchmesser (4) aus¬ gerichtet sind, und daß eine der Teilung und der Zahl der Mäander zugeordnete erste Zahl von Polpaaren (N,S) der Magnetscheibe (8) in Richtung dieser Mäander ausge¬ richtet ist.a) the majority of the turns form a first coil (6) with an average coil diameter, whose meandering turns are aligned at a first angle with a uniform pitch to the circle diameter (4), and that one of the pitch and the number the first number of pole pairs (N, S) of the magnetic disk (8) assigned to the meander is oriented in the direction of these meanders.
b) mehrere, über einen Kreisumfang nach einem vorbe¬ stimmten Schema verteilte Windungen, mit dem mittleren Spulendurchmesser der ersten Spule (6) eine zweite Spu¬ le (7) bilden, deren mäanderförmige Windungen unter dem Winkel der ersten Spule (6) zum Kreisdurchmesser (4) ausgerichet sind und daß eine der Zahl der Windungen der zweiten Spule (7) zugeordnete zweite Zahl von Polpaaren der Magnetscheibe (8) in Richtung dieser Mäan¬ der ausgerichtet ist, wobei die Verteilung der Windun¬ gen der zweiten Spule (7) nebst zugehöriger Polpaare derart ausgebildet ist, daß an einer vorbestimmten Stel¬ lung der Magnetscheibe (8) während einer Umdrehung in - 3 -b) a plurality of windings distributed over a circumference according to a predetermined scheme form a second coil (7) with the mean coil diameter of the first coil (6), the meandering windings of which at the angle of the first coil (6) to the circle diameter (4) are aligned and that a second number of pole pairs of the magnetic disk (8) assigned to the number of turns of the second coil (7) is oriented in the direction of these meanders, the distribution of the turns of the second coil (7) In addition to the associated pole pairs, it is designed in such a way that at a predetermined position of the magnetic disk (8) during one revolution in - 3 -
einzelnen Windungen der zweiten Spule (7) Spannungen durch die zweiten Polpaare in gleicher Richtung (pha¬ sengleich) induziert werden.individual turns of the second coil (7) voltages are induced by the second pole pairs in the same direction (in phase).
3. Tachogenerator nach Anspruch 1, dadurch gekennzeichnet, daß die Mäander der ersten Spule (2) unter einem positi¬ ven und die Mäander der zweiten Spule (3) unter einem negativen Winkel zum Kreisdurchmesser (4) ausgerichtet sind.3. tachometer generator according to claim 1, characterized in that the meanders of the first coil (2) are aligned at a positive and the meanders of the second coil (3) at a negative angle to the circular diameter (4).
4. Tachogenerator nach Anspruch 3, dadurch gekennzeichnet, daß beide Winkel gleich groß sind.4. tachometer generator according to claim 3, characterized in that both angles are the same size.
5. Tachogenerator nach Anspruch 4, dadurch gekennzeichnet, daß die Winkel 45 betragen.5. tachometer generator according to claim 4, characterized in that the angles are 45.
6. Tachogenerator nach einem der Ansprüche 1 oder 2, da¬ durch gekennzeichnet, daß die Spulen (2,3,6,7) ineinan¬ der verschachtelt auf einer Leiterplattenseite (1) ange¬ ordnet sind.6. tachometer generator according to one of claims 1 or 2, da¬ characterized in that the coils (2,3,6,7) nested in one another are arranged on a circuit board side (1).
7. Tachogenerator nach einer der Ansprüche 1 oder 2, da¬ durch gekennzeichnet, daß die Spulen (2,3,6,7) voneinan¬ der getrennt auf einer doppelseitig kaschierten Leiter¬ platte angeordnet sind.7. tachometer generator according to one of claims 1 or 2, da¬ characterized in that the coils (2,3,6,7) are arranged separately from each other on a double-sided laminated printed circuit board.
8. Tachogenerator nach einer der Anspruch 1 oder 2, da¬ durch gekennzeichnet, daß die Magnetpolpaare der Magnet¬ scheibe (5,8) ineinander verschachtelt sind.8. tachometer generator according to one of claims 1 or 2, da¬ characterized in that the magnetic pole pairs of the magnetic disk (5,8) are nested one inside the other.
9. Tachogenerator nach einem der Ansprüche 1 oder 2, da¬ durch gekennzeichnet, daß die zweite Zahl der Polpaare (N,S) der Zahl der zugeordneten Mäander entspricht. - Λ0 -9. tachometer generator according to one of claims 1 or 2, da¬ characterized in that the second number of pole pairs (N, S) corresponds to the number of assigned meanders. - Λ0 -
10. Tachogenerator nach einem der Ansprüche 1 oder 2, da¬ durch gekennzeichnet, daß mehr als zwei Spulen ineinan¬ der verschachtelt sind.10. tachometer generator according to one of claims 1 or 2, da¬ characterized in that more than two coils are nested in one another.
11. Tachogenerator nach einem der Ansprüche 1 oder 2, da¬ durch gekennzeichne , daß die Anordnung der zweiten Spu¬ le (3,7) oder der zugehörigen Magnetpolpaare so gewählt ist, daß ein oder mehrere Impulse pro Umdrehung erzeugt werden.11. Tachometer generator according to one of claims 1 or 2, characterized by that the arrangement of the second coil (3, 7) or the associated magnetic pole pairs is selected such that one or more pulses are generated per revolution.
12. Tachogenerator nach Anspruch 2, dadurch gekennzeichnet, daß die Windungszahl der zweiten Spule (7) geradzahlig ist. 12. tachometer generator according to claim 2, characterized in that the number of turns of the second coil (7) is an even number.
EP89906774A 1988-06-22 1989-06-13 Tacho generator Pending EP0420885A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3821050 1988-06-22
DE3821050A DE3821050A1 (en) 1988-06-22 1988-06-22 TACHOGENERATOR

Publications (1)

Publication Number Publication Date
EP0420885A1 true EP0420885A1 (en) 1991-04-10

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ID=6357005

Family Applications (2)

Application Number Title Priority Date Filing Date
EP89110686A Expired - Lifetime EP0347722B1 (en) 1988-06-22 1989-06-13 Tachometer generator
EP89906774A Pending EP0420885A1 (en) 1988-06-22 1989-06-13 Tacho generator

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP89110686A Expired - Lifetime EP0347722B1 (en) 1988-06-22 1989-06-13 Tachometer generator

Country Status (9)

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US (1) US5177389A (en)
EP (2) EP0347722B1 (en)
JP (1) JP2920834B2 (en)
KR (1) KR0140523B1 (en)
AT (1) ATE83591T1 (en)
DE (2) DE3821050A1 (en)
ES (1) ES2037334T3 (en)
HK (1) HK117794A (en)
WO (1) WO1989012925A1 (en)

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Also Published As

Publication number Publication date
KR900702625A (en) 1990-12-07
US5177389A (en) 1993-01-05
JP2920834B2 (en) 1999-07-19
ES2037334T3 (en) 1993-06-16
HK117794A (en) 1994-11-04
JPH03505395A (en) 1991-11-21
KR0140523B1 (en) 1998-08-17
EP0347722A1 (en) 1989-12-27
EP0347722B1 (en) 1992-12-16
ATE83591T1 (en) 1993-01-15
DE58903000D1 (en) 1993-01-28
WO1989012925A1 (en) 1989-12-28
DE3821050A1 (en) 1989-12-28

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