DE522188C - Measuring device for alternating current to generate a measured variable that is only dependent on the frequency - Google Patents

Measuring device for alternating current to generate a measured variable that is only dependent on the frequency

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Publication number
DE522188C
DE522188C DEM112924D DEM0112924D DE522188C DE 522188 C DE522188 C DE 522188C DE M112924 D DEM112924 D DE M112924D DE M0112924 D DEM0112924 D DE M0112924D DE 522188 C DE522188 C DE 522188C
Authority
DE
Germany
Prior art keywords
frequency
measuring device
measured variable
alternating current
coil
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
DEM112924D
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.)
GEORG J MEYER DR ING
Original Assignee
GEORG J MEYER DR ING
Publication date
Priority to DEM112924D priority Critical patent/DE522188C/en
Application granted granted Critical
Publication of DE522188C publication Critical patent/DE522188C/en
Expired legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/02Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Description

Meßeinrichtung für Wechselstrom zur Erzeugung einer nur von der Frequenz abhängigen IVIeßgröße Die Erfindung bezweckt die Ableitung einer synchronen und nur von der Frequenz abhängigen Wechselspannung aus einer veränderlichen Wechselstromgröße, wie Stromstärke oder Spannung. Die Ableitung geschieht nach der Erfindung durch einen oszillierenden Synchronmotor, der von der Meßgröße angetrieben wird, und eine Magnetmaschine mit Permanentmagneten.Measuring device for alternating current for generating a frequency only The object of the invention is to derive a synchronous and AC voltage dependent only on the frequency from a variable alternating current quantity, like current or voltage. The derivation is carried out according to the invention an oscillating synchronous motor which is driven by the measured variable, and a Magnet machine with permanent magnets.

Man hat bereits oszillierende Synchronmotoren vorgeschlagen, die eine stroboskopartige Blende bewegen, aber nicht zur Speisung elektrischer Meßgeräte dienen. Durch die hier verwendete Magnetmaschine in Verbindung mit dem oszillierenden Synchronmotor wird der synchrone, nur frequenzabhängige, aber amplitudenunabhängige Sekundärstrom erzeugt, der eine @ elektrische Messung (im Gegensatz zu der bekannten optischen) ermöglicht.It has already been proposed oscillating synchronous motors, the one Move the stroboscopic screen, but not to feed electrical measuring devices to serve. Due to the magnetic machine used here in connection with the oscillating The synchronous motor becomes the synchronous, only frequency-dependent, but amplitude-independent Secondary current generated, which an @ electrical measurement (in contrast to the known optical).

Ein Ausführungsbeispiel ist in der Abbildung dargestellt. Der geschlitzte. Magnetring i trägt die Erregerwicklung--, die Primärwicklung, die im zu messenden Wechselstrom oder an der zu messenden Wechselspannung liegt. Zwischen den Schenkeln bewegt sich das Ende N eines Stabmagneten 3; es wird nach links gezogen, wenn dort gerade ein Südpol ist; es wird von links abgestoßen und nach rechts gezogen, wenn der Südpol rechts liegt. Der Stab 3 schwingt also synchron mit dem Erregerstrom in der Wicklung 2.An exemplary embodiment is shown in the figure. The slotted one. Magnet ring i carries the excitation winding -, the primary winding, the one to be measured AC current or the AC voltage to be measured. Between the thighs the end N of a bar magnet 3 moves; it is dragged to the left when there is just a south pole; it is repelled from the left and pulled to the right when the south pole is on the right. The rod 3 thus oscillates synchronously with the excitation current in the winding 2.

Das untere Ende S des Permanentmagneten 3 schwingt im Spalt eines zweiten Magnetsystems q., 5 mit den induzierten Wicklungen 6, 7. Dadurch wird in diesen Sekundärwicklungen eine Wechselspannung erzeugt, die der Frequenz und dem Magnetfeld des Magneten 3 proportional und mit der Schwingung synchron, aber von der Feldstärke des Magneten i unabhängig ist. Die Sekundärspannung kann also bei veränderlicher Frequenz zur Messung derselben, bei konstanter Frequenz z. B. zur Speisung der einen Wicklung 9 eines Wattmeters & dienen, dessen andere Wicklung i o von der gleichen Wechselstromgröße gespeist wird wie die Spule 2. Für Strommessungen sind 2 und i o zweckmäßig in Reihe, für Spannungsmessungen parallel zu schalten.The lower end S of the permanent magnet 3 oscillates in the gap of a second magnet system q., 5 with the induced windings 6, 7. This is in These secondary windings generate an alternating voltage that corresponds to the frequency and the Magnetic field of the magnet 3 proportional and synchronous with the oscillation, but of the field strength of the magnet i is independent. The secondary voltage can therefore be variable frequency for measuring the same, at constant frequency z. B. to Feed one winding 9 of a wattmeter & serve the other winding i o is fed by the same amount of alternating current as coil 2. For current measurements 2 and i o are useful in series, to be connected in parallel for voltage measurements.

Benutzt man statt des Wattmeters einen Quotientenmesser, so erzielt man eine Skala nach einer Tangens- oder Kotangensfunktion. Erstere ist z. B. als Annäherung einer Sättigungsfunktion verwendbar und kann durch bekannte Hilfsmittel dieser weiter angepaßt werden.If you use a quotient meter instead of the wattmeter, you get a scale according to a tangent or cotangent function. The former is z. B. as Approximation of a saturation function can be used and can be done by known means this must be further adapted.

Statt des einen Permanentmagneten 3, der gleichzeitig mit dem primären, und dem sekundären Magnetfeld zusammenarbeitet, kann man getrennte Magnete verwenden, die mechanisch gekuppelt sind, etwa auf einer gemeinsamen Welle sitzen. Der Magnet des Primärsystems ist dann ein Permanentmagnet oder etwa ein von einer Batterie erregter Gleichstrommagnet, dessen Erregung nicht notwendig konstant ist; der Magnet des Sekundärsystems ist ein Permanentmagnet 'oder ein Gleichstrommagnet mit konstanter Erregung.Instead of the one permanent magnet 3, which is simultaneously with the primary, and the secondary magnetic field work together, you can use separate magnets, which are mechanically coupled, for example sitting on a common shaft. The magnet of the primary system is then a permanent magnet or, for example, one from a battery excited DC magnet, the excitation of which is not necessarily constant; the magnet of the secondary system is a permanent magnet 'or a direct current magnet with constant Excitement.

Claims (3)

PATEN TANSPRÜCFIE i. Meßeinrichtung für Wechselstrom zur Erzeugung einer nur von der Frequenz abhängigen Meßgröße mittels eines oszillierenden Wechselstromsynchromnotors, dadurch gekennzeichnet, daß mit diesem Motor eine oszillierende Wechselstrommagnetmaschine gekuppelt ist, derart, daß der in Abhängigkeit von derPeriodenzahl oszillierende Magnetanker sich vor Permanentmagneten bewegt; die mit Wicklungen versehen sind, denen der der Frequenz proportionale Meßstrom entnommen wird. PATEN TANSPRÜCFIE i. Measuring device for alternating current for generation a measured variable that is only dependent on the frequency by means of an oscillating alternating current synchronous motor, characterized in that an oscillating AC magnet machine with this motor is coupled in such a way that the oscillating depending on the number of periods Magnet armature moves in front of permanent magnets; which are provided with windings, from which the measuring current proportional to the frequency is taken. 2. Meßeinrichtung nach Anspruch i, dadurch gekennzeichnet, daß bei Strom- oder Spannungsmessungen die Meßgröße direkt die eine Spule eines Wattmeters und mittelbar durch die induzierte Sekundärspannung die zweite Spule des gleichen Wattmeters speist, zum Zwecke der Erzielung einer linearen Skala. 2. Measuring device according to claim i, characterized in that in the case of current or voltage measurements the measured variable directly the one coil of a wattmeter and indirectly through the induced one Secondary voltage feeds the second coil of the same wattmeter, for the purpose of Achieving a linear scale. 3. Meßeinrichtung nach Anspruch i, dadurch gekennzeichnet, daß bei Strom- oder Spannungsmessungen die Meßgröße direkt die eine Spule eines Quotientenmessers und mittelbar durch die induzierte Spannung die zweite Spule des gleichen Quotientenmessers speist, zum Zwecke der Erzielung einer Skala nach dem Tangentengcsetz.3. Measuring device according to claim i, characterized in that that with current or voltage measurements the measured variable directly the one coil of a Quotient meter and indirectly through the induced voltage the second coil of the same quotient meter feeds, for the purpose of achieving a scale according to the Tangent law.
DEM112924D Measuring device for alternating current to generate a measured variable that is only dependent on the frequency Expired DE522188C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEM112924D DE522188C (en) Measuring device for alternating current to generate a measured variable that is only dependent on the frequency

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM112924D DE522188C (en) Measuring device for alternating current to generate a measured variable that is only dependent on the frequency

Publications (1)

Publication Number Publication Date
DE522188C true DE522188C (en) 1931-04-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
DEM112924D Expired DE522188C (en) Measuring device for alternating current to generate a measured variable that is only dependent on the frequency

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DE (1) DE522188C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE941137C (en) * 1952-05-28 1956-04-05 Johann Mirowsky Device for measuring, generating or comparing frequencies and numbers of revolutions
DE1038190B (en) * 1952-09-12 1958-09-04 Gen Electric Co Ltd Device for measuring the frequency of an alternating voltage or the rotational speed of a shaft

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE941137C (en) * 1952-05-28 1956-04-05 Johann Mirowsky Device for measuring, generating or comparing frequencies and numbers of revolutions
DE1038190B (en) * 1952-09-12 1958-09-04 Gen Electric Co Ltd Device for measuring the frequency of an alternating voltage or the rotational speed of a shaft

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