DE592728C - Process for operational measurement of current and voltage on DC machines in operation - Google Patents

Process for operational measurement of current and voltage on DC machines in operation

Info

Publication number
DE592728C
DE592728C DEA57291D DEA0057291D DE592728C DE 592728 C DE592728 C DE 592728C DE A57291 D DEA57291 D DE A57291D DE A0057291 D DEA0057291 D DE A0057291D DE 592728 C DE592728 C DE 592728C
Authority
DE
Germany
Prior art keywords
voltage
machines
current
measurement
armature
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
DEA57291D
Other languages
German (de)
Inventor
Richard Dietze
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.)
AEG AG
Original Assignee
AEG AG
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 AEG AG filed Critical AEG AG
Priority to DEA57291D priority Critical patent/DE592728C/en
Application granted granted Critical
Publication of DE592728C publication Critical patent/DE592728C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/34—Testing dynamo-electric machines
    • G01R31/343—Testing dynamo-electric machines in operation

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Motor Or Generator Current Collectors (AREA)

Description

Verfahren zur betriebsmäßigen Messung von Strom und Spannung an im Betrieb befindlichen Gleichstrommaschinen Normalerweise erfolgt die Messung von Strom und Spannung bei Gleichstrommaschinen an den von der Maschine, und zwar von dem Kollektor ausgehenden Leitungen mittels bekannter Meßeinrichtungen. Es gibt jedoch Fälle, wo bei der Anwendung der bekannten Einrichtung gewisse Schwierigkeiten bestehen. Wenn z._B. die Spannung von Gleichstrom-Hochspannungsmaschinen gemessen werden soll, so ist der Wattverbrauch der Meßeinrichtung, besonders bei kleinen Maschinen, wie sie beispielsweise zur Erzeugung von Anodenspannung verwendet werden, verhältnismäßig groß. Andererseits kann ein kleiner Stromverbrauch der Meßeinrichtung nur durch verhältnismäßig sehr teure Vorwiderstände für das Instrument erreicht werden.Procedure for operational measurement of current and voltage at im DC machines in operation Normally, the measurement is made from Current and voltage in direct current machines to those of the machine, namely of the collector outgoing lines by means of known measuring devices. There is however, cases where certain difficulties in using the known device exist. If e.g. measured the voltage of direct current high voltage machines is to be, so is the watt consumption of the measuring device, especially with small ones Machines such as those used to generate anode voltage, relatively large. On the other hand, a small power consumption of the measuring device only achieved through relatively very expensive series resistors for the instrument will.

Gegenüber diesen Nachteilen bedeutet das nachstehend beschriebene Verfahren eine wesentliche Verbesserung. Das Verfahren zur betriebsmäßigen Messung von Strom und Spannung an im Betrieb befindlichen Gleichstrommaschinen besteht erfindungsgemäß darin, daß die im Gleichstromanker fließenden Wechselströme bzw. Spannungen gemessen werden, die ein Maß für die zu messenden, am Kollektor vorhandenen Gleichströme darstellen. Zur Messung der Klemmenspannung wird die Ankerwicklung an zwei bestimmten Punkten angezapft. Es ist an sich bekannt, bei Gleichstrommaschinen neben dem Kollektor zur Abnahme des Gleichstromes weitere Schleifringe vorzusehen, an denen dem Anker Wechselspannung entnommen wird. Von den Schleifringen kann Wechselspannung abgenommen und insbesondere -über einen Spannungswandler gemessen werden. An den Sekundärkreis des Spannungswandlers wird dann das entsprechend geeichte Meßinstrument oder irgendwelche Regulier- und Schutzeinrichtungen angeschlossen. Die Verluste in dem Spannungswandler können als verhältnismäßig gering bezeichnet werden. Durch die Zwischenschaltung des Wandlers, dessen Sekundärkreis geerdet werden kann, wird die Verwendung eines Niederspannungsinstrumentes ermöglicht. Der Spannungswandler kann in den Anker der Maschine eingebaut werden, wobei der Sekundärkreis mit den Schleifringen verbunden wird. Ferner ist es denkbar, daß zur Messung des in der Ankerwicklung fließenden Wechselstromes ein Stromwandler verwendet wird, welcher ebenfalls in den Anker eingebaut oder mit der Ankerwicklung über Schleifringe verbunden werden kann.In contrast to these drawbacks, means what is described below Procedure a significant improvement. The procedure for operational measurement According to the invention, there is current and voltage on direct current machines in operation in that the alternating currents or voltages flowing in the direct current armature are measured which are a measure of the direct currents to be measured and present at the collector represent. To measure the terminal voltage, the armature winding is connected to two specific Points tapped. It is known per se, in DC machines next to the collector to provide additional slip rings to decrease the direct current, on which the armature AC voltage is taken. AC voltage can be taken from the slip rings and in particular -be measured via a voltage converter. To the secondary circuit of the voltage converter is then the appropriately calibrated measuring instrument or any Control and protection devices connected. The losses in the voltage converter can be described as relatively low. Through the interposition of the converter whose secondary circuit can be grounded, the use of a Low voltage instrument allows. The voltage converter can be installed in the armature of the Machine installed with the secondary circuit connected to the slip rings will. It is also conceivable that to measure the flowing in the armature winding AC a current transformer is used, which is also in the armature installed or connected to the armature winding via slip rings can.

Claims (1)

PATENTANSPRÜCHE: i. Verfahren zur betriebsmäßigen Messung von Strom und Spannung an in Betrieb befindlichen Gleichstrommaschinen, insbesondere Gleichstrom-Hochspannungsmaschinen, gekennzeichnet durch die Messung der im Gleichstromanker fließenden Wechselströme bzw. Wechselspannungen, die ein Maß für die zu messenden, am Kollektor vorhandenen Gleichströme darstellen. z. Einrichtung zur Ausübung des Verfahrens nach Anspruch i, dadurch gekennzeichnet, daß die Gleichstrommaschine nach Art der an sich bekannten Doppelstrommaschine ausgebildet ist. 3. Einrichtung nach Anspruch z, dadurch gekennzeichnet, daß die Messung über Wandler erfolgt, die erforderlichenfalls in den Anker der Maschine eingebaut sind.PATENT CLAIMS: i. Procedure for operational measurement of electricity and voltage on DC machines in operation, in particular DC high-voltage machines, characterized by the measurement of the alternating currents flowing in the direct current armature or alternating voltages, which are a measure of what is to be measured and is present on the collector Represent direct currents. z. Device for performing the method according to claim i, characterized in that the DC machine of the type known per se Double flow machine is designed. 3. Device according to claim z, characterized in that that the measurement takes place via transducers, if necessary in the armature of the machine are built in.
DEA57291D 1929-03-28 1929-03-28 Process for operational measurement of current and voltage on DC machines in operation Expired DE592728C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA57291D DE592728C (en) 1929-03-28 1929-03-28 Process for operational measurement of current and voltage on DC machines in operation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA57291D DE592728C (en) 1929-03-28 1929-03-28 Process for operational measurement of current and voltage on DC machines in operation

Publications (1)

Publication Number Publication Date
DE592728C true DE592728C (en) 1934-02-13

Family

ID=6941010

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA57291D Expired DE592728C (en) 1929-03-28 1929-03-28 Process for operational measurement of current and voltage on DC machines in operation

Country Status (1)

Country Link
DE (1) DE592728C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0274691A1 (en) * 1986-12-15 1988-07-20 Hitachi, Ltd. Fault diagnosis system for rotor winding of rotary electric machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0274691A1 (en) * 1986-12-15 1988-07-20 Hitachi, Ltd. Fault diagnosis system for rotor winding of rotary electric machine
US4851766A (en) * 1986-12-15 1989-07-25 Hitachi, Ltd. Fault diagnosis system for rotor winding of rotary electric machine

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