DE102004025176A1 - Phase failure recognition circuit for a converter compares potential at a resistance star point relative to that of a positive or negative intermediate circuit voltage - Google Patents
Phase failure recognition circuit for a converter compares potential at a resistance star point relative to that of a positive or negative intermediate circuit voltage Download PDFInfo
- Publication number
- DE102004025176A1 DE102004025176A1 DE102004025176A DE102004025176A DE102004025176A1 DE 102004025176 A1 DE102004025176 A1 DE 102004025176A1 DE 102004025176 A DE102004025176 A DE 102004025176A DE 102004025176 A DE102004025176 A DE 102004025176A DE 102004025176 A1 DE102004025176 A1 DE 102004025176A1
- Authority
- DE
- Germany
- Prior art keywords
- detection circuit
- phase
- phase failure
- voltage
- circuit 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.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
- H02H3/253—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage for multiphase applications, e.g. phase interruption
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/145—Indicating the presence of current or voltage
- G01R19/155—Indicating the presence of voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/125—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers
- H02H7/1252—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers responsive to overvoltage in input or output, e.g. by load dump
Landscapes
- Rectifiers (AREA)
Abstract
Description
Die Erfindung betrifft eine Phasenausfallerkennungsschaltung für ein mehrphasiges Netz, mit dem ein Umrichter, vorzugsweise ein nicht rückspeisefähiger Umrichter, gespeist wird.The The invention relates to a phase failure detection circuit for a polyphase Network with which a converter, preferably a non-regenerative converter, is fed.
Ein solcher Umrichter weist eine Gleichrichterschaltung, einen nachgeschalteten Zwischenkreis mit einem Zwischenkreiskondensator und einen nachgeschalteten Wechselrichter auf. Er dient zum Umwandeln von Wechselstrom fester Frequenz, wie er beispielsweise aus einem Versorgungsnetz entnommen wird, in einen Wechselstrom variabler Frequenz, zum Betreiben eines Motors.One Such converter has a rectifier circuit, a downstream DC link with a DC link capacitor and a downstream Inverter on. It is used to convert AC solid Frequency, as taken for example from a supply network is, in an alternating current of variable frequency, for operating a Engine.
Um Schaden von einem Umrichter und einem vom Umrichter angetriebenen Motor abzuwenden, ist es wünschenswert, den Umrichter bei Ausfall einer oder mehrer Phasen des speisenden Netzes vollständig vom Netz zu trennen.Around Damage from an inverter and a drive driven by the inverter Avert the engine, it is desirable the inverter in case of failure of one or more phases of the feeding Net completely disconnect from the network.
Eine übliche Schaltung zur Phasenausfallerkennung besteht aus drei Dioden, mit denen die drei Phasen eines speisenden Netzes gleichgerichtet und zu einer welligen Gleichspannung verschaltet werden. Diese Spannung wird von einem Komparator mit einer Referenzspannung verglichen. Fällt die Spannung bei einem Phasenausfall unter die Referenzspannung, steuert der Komparator ein retriggerbares Monoflop an, das wiederum ein Alarmsignal ausgibt. Diese Schaltung ist vergleichsweise aufwändig.A usual circuit for phase failure detection consists of three diodes, with which the three phases of a feeding network rectified and to one wavy DC voltage can be interconnected. This tension is from compared to a comparator with a reference voltage. Does that fall? Voltage at a phase failure below the reference voltage controls the comparator to a retriggerable monoflop, which in turn a Alarm signal outputs. This circuit is relatively expensive.
Die
Aufgabe der Erfindung ist es, eine möglichst einfache und kostengünstige Schaltung zur Erfassung eines Phasenausfalls bei Umrichtersystemen zu schaffen.task The invention is to be as simple as possible and cost-effective Circuit for detecting a phase failure in inverter systems create.
Diese Aufgabe wird gelöst durch eine Vorrichtung mit den Merkmalen des Anspruches 1.These Task is solved by a device having the features of claim 1.
Mit sternförmig zwischen die Phasen eines speisenden Netzes geschalteten Widerständen wird die mittlere Spannung der Phasen des speisenden Netzes gegenüber der negativen oder positiven Spannung im Zwischenkreis des Umrichters ermittelt und mit einer Referenzspannung verglichen. Fällt diese Spannung unter den Referenzwert, kann auf einen Phasenausfall geschlossen werden.With star shape between the phases of a feeding network resistors is the average voltage of the phases of the feeding network compared to the negative or positive voltage in the DC link of the inverter determined and compared with a reference voltage. Does this fall Voltage below the reference value, can be closed to a phase failure become.
Weitere Vorteile sowie Einzelheiten der vorliegenden Erfindung ergeben sich aus der nachfolgenden Beschreibung einer bevorzugten Ausführungsform anhand der Figuren. Dabei zeigtFurther Advantages and details of the present invention will become apparent from the following description of a preferred embodiment based on the figures. It shows
Die
drei Phasen L1, L2, L3 eines speisenden Netzes mit je 400 V Wechselspannung
werden mit drei ersten Widerständen
R1 (je 220kOhm) in Sternschaltung summiert. Gegenüber der
negativen Spannung –Uzk
(ca. 280V unterhalb Erdpotential) des Zwischenkreises
Diese
Spannung wird mit einem zweiten Widerstand R2 (1,78kOhm) zwischen
dem Sternpunkt der drei ersten Widerstände R1 und der negativen Stromschiene –Uzk des
Zwischenkreises
Bei
Ausfall einer oder mehrerer Phasen L1, L2, L3 entsteht ein periodischer
Spannungseinbruch, der den Komparator
Mit dem Signal AC-Fail lässt sich in einer Folgeelektronik beispielsweise eine völlige Trennung des Umrichters vom speisenden Netz auslösen. Hierzu sollte das Signal AC-Fail über einen Optokoppler galvanisch getrennt mit der Folgeelektronik verbunden werden, da nur so eine sichere Trennung der mit dem speisenden Netz in Verbindung stehenden Bereiche von einem sicheren Niederspannungsbereich des Umrichters erreicht werden kann.With the signal AC-Fail For example, in a subsequent electronics, a complete separation of the Trigger inverter from feeding network. This should be the signal AC fail over an optocoupler galvanically isolated connected to the subsequent electronics be, because only so a safe separation of the dining with the network communicating areas of a safe low voltage area of the Inverter can be achieved.
Natürlich kann die hier beschriebene Phasenausfallerkennungsschaltung auch mit einem Bezug zur positiven Zwischenkreisspannung +Uzk aufgebaut werden.Of course, the Pha senausfallerkennungsschaltung also be constructed with a reference to the positive DC link voltage + Uzk.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004025176A DE102004025176A1 (en) | 2004-04-26 | 2004-05-21 | Phase failure recognition circuit for a converter compares potential at a resistance star point relative to that of a positive or negative intermediate circuit voltage |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004020520 | 2004-04-26 | ||
DE102004020520.5 | 2004-04-26 | ||
DE102004025176A DE102004025176A1 (en) | 2004-04-26 | 2004-05-21 | Phase failure recognition circuit for a converter compares potential at a resistance star point relative to that of a positive or negative intermediate circuit voltage |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102004025176A1 true DE102004025176A1 (en) | 2005-11-17 |
Family
ID=35160415
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102004025176A Withdrawn DE102004025176A1 (en) | 2004-04-26 | 2004-05-21 | Phase failure recognition circuit for a converter compares potential at a resistance star point relative to that of a positive or negative intermediate circuit voltage |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102004025176A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2381573A4 (en) * | 2008-12-25 | 2017-06-07 | Hitachi Power Semiconductor Device, Ltd. | Apparatus for protecting power supply circuit of three-phase inverter |
DE102017101076A1 (en) | 2017-01-20 | 2018-07-26 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Circuit for monitoring at least two supply voltages required for the operation of an electrical device |
DE112011105707B4 (en) | 2011-10-04 | 2022-03-24 | Mitsubishi Electric Corporation | elevator control device |
-
2004
- 2004-05-21 DE DE102004025176A patent/DE102004025176A1/en not_active Withdrawn
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2381573A4 (en) * | 2008-12-25 | 2017-06-07 | Hitachi Power Semiconductor Device, Ltd. | Apparatus for protecting power supply circuit of three-phase inverter |
DE112011105707B4 (en) | 2011-10-04 | 2022-03-24 | Mitsubishi Electric Corporation | elevator control device |
DE102017101076A1 (en) | 2017-01-20 | 2018-07-26 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Circuit for monitoring at least two supply voltages required for the operation of an electrical device |
DE102017101076B4 (en) | 2017-01-20 | 2019-03-14 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Circuit for monitoring at least two supply voltages required for the operation of an electrical device |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
R012 | Request for examination validly filed |
Effective date: 20110205 |
|
R016 | Response to examination communication | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |