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 operationInfo
- 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
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)
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)
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 |
-
1929
- 1929-03-28 DE DEA57291D patent/DE592728C/en not_active Expired
Cited By (2)
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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