EP2483564B1 - Turbo pump power supply unit with switching device - Google Patents
Turbo pump power supply unit with switching device Download PDFInfo
- Publication number
- EP2483564B1 EP2483564B1 EP10760992.7A EP10760992A EP2483564B1 EP 2483564 B1 EP2483564 B1 EP 2483564B1 EP 10760992 A EP10760992 A EP 10760992A EP 2483564 B1 EP2483564 B1 EP 2483564B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- switching device
- drive motor
- connection
- switching
- microcomputer
- 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.)
- Not-in-force
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/12—Combinations of two or more pumps
- F04D13/14—Combinations of two or more pumps the pumps being all of centrifugal type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
- F04D15/029—Stopping of pumps, or operating valves, on occurrence of unwanted conditions for pumps operating in parallel
Definitions
- the invention relates to a arranged on a centrifugal pump assembly switching device according to the preamble of claim 1, and a centrifugal pump assembly with such a switching device and a method for operating a centrifugal pump assembly.
- DE 10 2006 018 025 A1 is a arranged on a centrifugal pump assembly switching device and an arrangement of parallel operated centrifugal pump units with several such switching devices known. Such arrangements of centrifugal pump units can be found in a variety of piping systems in which a certain discharge pressure is to be maintained.
- the microcomputer is integrated in the switching device, the switching device provided with at least one signal input and terminals for at least one serial bus system, the microcomputer connected to the signal input and the terminals of the bus system and in the drive motor and / or the switching device means for passing signals are present.
- the switching device is provided with a connection for a second voltage network, and the switching means switches the current flow for a drive motor connection arranged on the switching device and / or the drive motor such that the drive motor connection and / or the drive motor with the connection for the first voltage network and / or with the connection for the second voltage network is connectable.
- the use of in the WO 2007/118706 A1 described switching device in a multi-pump arrangement For example, a double pump arrangement, in which each pump is to be operated either with a first voltage or with a second voltage, requires a switching device per centrifugal pump unit. For some, in practice encountered common standard configurations, such as a double pump arrangement, this seems too complex.
- the EP 0735 273 A1 discloses a double pump with two arranged in a housing wheels that promote a fluid. Each impeller is driven by one electric motor each. At one of the two electric motors, a higher-level control and / or regulation is arranged, which adjusts or regulates the rotational speeds of the two electric motors independently of each other arbitrarily between engine stall and the rated speed.
- the US 2006/0072262 A1 shows a system with multiple power sources and a switching device for supplying power to a plurality of consumers.
- the invention is based on the problem of developing a cost-effective switching device for a centrifugal pump assembly, which in certain multi-pump arrangements, in particular in a double pump arrangement, a speed-proof or speed-controlled operation of the centrifugal pump units allows for low wiring and supports a fail-safe operation of the centrifugal pump assembly.
- the switching device has at least one further connection for a further drive motor and at least one additional switching means which switches the current flow for the further drive motor connection and / or for the at least one further drive motor such that the further drive motor connection and / or or the further drive motor can be connected to the connection for the first voltage network and / or to the connection for the second voltage network.
- the drive motor connections and / or the drive motors can be individually connected to one of the voltage networks, depending on the system requirements.
- the switching device can be mounted on a drive motor and / or a centrifugal pump of a centrifugal pump assembly.
- a switching device can switch not only the drive motor on which the switching device is arranged between two voltage networks, but a switching can also be made for other connectable to the switching device drive motors.
- a mounted on a centrifugal pump assembly switching device is thus able to control a complete multi-pump assembly. Since the switching device is provided with a connection for a second voltage network, the centrifugal pump units of a centrifugal pump arrangement provided with such a switching device can be connected to different voltage networks.
- the arrangement of the switching device to the drive motor saves cabinet space and through the integrated microcomputer, the dependence on a central, higher-level control is prevented. This improves the reliability of such a centrifugal pump assembly.
- the switching device has means for passing the first voltage network and a connection for the electrical supply of a device for generating the second voltage network.
- This is an electrical supply of an external device that is used to generate the second voltage network serves, provided directly from the switching device.
- a frequency converter connected to the switching device can be supplied electrically directly from the switching device.
- a separately available supply branch for the device for generating the second voltage network is eliminated. It suffices a mains supply to the switching device.
- the switching means switches the drive motor between different voltage networks or between voltage networks with fixed and variable frequency.
- the function of the centrifugal pump units is ensured even in the event of a power grid failure.
- connection of the switching device for a second voltage network with a frequency converter wherein the frequency converter is electrically supplied via the connection for electrical supply of the device for generating the second voltage
- each with two switching means a drive motor between the voltage networks switch and connect the microcomputer, preferably by means of one or more control lines or a bus system to the frequency converter.
- a switching means which may also act like a toggle switch, only an immediate switching is possible. With two switching means, the timing of the switching process can be individually adjusted via the microcomputer to the particular situation.
- a connection or disconnection request for a centrifugal pump assembly or a changeover request between different voltage networks can be transmitted via a signal line or a bus system from a frequency converter to the switching device of the centrifugal pump arrangement. This allows the construction of a multi-pump arrangement with temporary assignment of the frequency converter voltage to individual drive motors, which are thereby speed-controlled switched on or off, while short connecting cable lengths.
- An advantage results from the fact that in case of failure of the frequency converter or even in a fault in the signal and / or the bus connection of the microcomputer or several centrifugal pump units can switch to a voltage network fixed frequency. Such an operating condition bypassing the frequency converter is also referred to as a bypass mode.
- An embodiment provided for a double pump arrangement in particular a twin pump arrangement, provides that two drive motors are connected to the switching device and four switching means switch the drive motors between the voltage networks. To a switching device thereby two drive motors can be connected. Depending on the system requirements, the drive motors can be individually connected to the fixed frequency voltage or to the frequency converter voltage. In a corresponding manner switching devices for further multi-pump arrangements are provided according to the invention.
- the switching device has means for detecting and / or storing motor current, motor voltage and / or power factor values. By recording and / or monitoring performance data, additional engine monitoring is possible.
- the switching device comprises means for monitoring and / or diagnostic functions. This means that different pump and / or drive-related variables can be recorded, determined and monitored. In particular, a monitoring of the voltage amplitudes of the frequency converter voltage is provided, whereby a malfunction of the frequency converter is detected. The purpose of this is provided in the switching device provided pulse width modulation monitoring module. Its signal indicates the absence of one or more voltage phases and is evaluated by the microcomputer, whereby an additional motor protection is achieved.
- the switching device may comprise operating / input means and / or display / output means. Examples of operating / input means include input keys, dip switches, signal inputs, as examples of display / output means display, multi-color LEDs, signal and relay outputs.
- a synchronization unit determines the respective phase and frequency positions between two voltage networks with fixed and / or variable frequency, and with equality of phase and frequency positions, a synchronization signal flows to a microcomputer and switches over a centrifugal pump unit. This allows a switch from one voltage network to another voltage network, whereby the formation of undesired pressure surges or pulsations in the pipeline system is avoided.
- the switching device may comprise means for controlling a frequency converter.
- a switching device control start, stop and / or the frequency of a frequency converter.
- a centrifugal pump assembly with at least two centrifugal pump units, each consisting of pump and motor, equipped with a switching device according to the invention.
- the switching device is electrically connected to the drive motors, in particular via a respective terminal box located on a drive motor.
- the switching device is arranged on one of the drive motors.
- the motor-mounted switching device can be attached by means of a holding device to the drive motor.
- the switching device is formed as part of one of the drive motors.
- One embodiment relates to a centrifugal pump arrangement with a frequency converter connected to the switching device, in particular arranged on the switching device and / or on a drive motor.
- a double pump arrangement with two centrifugal pump units with a switching device to which two drive motors are connected and four switching means to switch the drive motors between the voltage networks, wherein the switching device on one of the two drive motors and the frequency converter to the switching device and / or the other of the two drive motors disposed is.
- a special double pump arrangement is in particular a twin pump arrangement, in which the pumps have a common pump housing with a common suction and / or discharge nozzle, in the context of the invention.
- centrifugal pump arrangements with each other and / or with other centrifugal pump arrangements.
- a plurality of switching devices can be used, each of which switches at least two centrifugal pump units to the voltage networks.
- a combination with centrifugal pump units which are equipped with another switching device that switches one or more centrifugal pump units, is provided.
- a combination is provided with centrifugal pump units, which with a switching device according to the WO 2007/118706 A1 , which can perform switching operations for each one centrifugal pump unit, are equipped.
- These single pump switching devices are each capable of switching the fixed frequency voltage network or the variable frequency voltage network to the drive motors to which they are arranged.
- a bus system connects the switching devices in an advantageous manner, whereby the microcomputer are in operative connection with each other.
- one of the switching devices is configured as a priority switching device.
- the centrifugal pump units can be arranged in a flexible manner to a multi-pump system, such as to a pressure booster, in which the pumps - controlled by the priority switching device - if necessary, switched on or off.
- a multi-pump system such as to a pressure booster
- the double pump switching device can be designed as a priority switching device and control the other switching devices.
- An advantageous method for operating a centrifugal pump arrangement provides that the microcomputer evaluates one or more input signals and controls the connection or disconnection of the centrifugal pump units.
- the microcomputer of the switching device can control the activation and deactivation of the centrifugal pump units.
- the microcomputer can also control the change from a voltage network connected to a drive motor to another voltage network.
- the drive motor connections and / or the drive motors are individually connected to one of the voltage networks depending on the system requirements.
- the microcomputer with signals of a device for generating the second voltage network controls the operation of one or more centrifugal pump units.
- This can be, for example, a request signal for a further centrifugal pump assembly, a ready signal or an alarm signal.
- the microcomputer controls a device for generating the second voltage network, in particular a frequency converter. It is envisaged that the microcomputer controls the device for generating the second voltage network or the frequency converter with a start or stop signal.
- the switching device performs pump and / or drive-relevant monitoring and / or diagnostic functions.
- the microcomputer is capable of acquiring, processing and storing measured values.
- centrifugal pump assembly As a basis for monitoring and / or diagnosing a centrifugal pump assembly histograms are provided with cumulative over the life of a centrifugal pump unit performance and / or flow values. As a result of the invention, relevant data of several centrifugal pump units are available at any time and directly at a centrifugal pump arrangement.
- An advantageous method provides that the output voltage of the device for generating the second voltage, in particular the frequency converter, is monitored.
- a pulse width modulation monitoring is performed.
- the microcomputer evaluates a result of this monitoring, which is present for example in the form of a binary pulse width modulation signal, and takes it into account in the control of the switching means. This avoids, for example, that a drive motor is operated with a frequency converter voltage with a missing phase. In addition to monitoring the voltage of the second voltage network thus an effective motor protection is realized.
- one of the switching devices may be configured as a priority switching device.
- the microcomputer of a switching device can control the activation and deactivation of further centrifugal pump units and / or request their connection or disconnection via the bus system.
- the microcomputer preferably uses a synchronization signal to switch the drive motors between different voltage networks at the same phase and frequency positions of the voltage networks. Switchover-related voltage differences, current peaks and resulting pressure surges in the pipeline system are thereby prevented. A switchover of the drive motors to another voltage network can take place in such a way that in the switching device, the voltage network connected to a drive motor is disconnected only after the connection of the other voltage network.
- the Fig. 1 shows a double pump assembly 1 with two centrifugal pump units 2, 3 consisting of centrifugal pumps 4, 5 and drive motors 6, 7.
- the drive motors 6, 7 are equipped with terminal boxes 8, 9.
- a switching device 10 is arranged or attached.
- the switching device 10 has a connection 12 for a first voltage network and a connection 13 for a second voltage network.
- the terminals 12 and 13 are designed for the connection of multi-phase voltage networks, in particular three-phase voltage networks, multipole, in particular three-pole.
- lines 14 and 15 are connected to the connections 12 and 13 for connection to the voltage networks.
- the switching device 10 has a microcomputer and switching means which switch such that the drive motor 6 can be connected to the connection 12 for the first voltage network and / or to the connection 13 for the second voltage network.
- the switching device 10 has for this purpose a connection 16. About a connected thereto and the terminal box 8 line 17, the switching device 10 is electrically connected to the drive motor 6.
- the switching device 10 has a further connection 18 for a further drive motor 7, which is connected by means of a connected to the terminal box 9 line 19 with the switching device 10.
- additional switching means this is able to switch the current flow for the further drive motor 7 such that the further drive motor 7 to the terminal 12 for the first voltage network and / or to the terminal 13 for the second voltage network is connectable.
- a frequency converter 20 is arranged or attached.
- the frequency converter 20 is electrically supplied from the switching device 10.
- the frequency converter 20 generates a second voltage network with a variable frequency.
- the output voltage of the frequency converter 20 is guided by means of a terminal 24 and a line 15 to the terminal 13 of the switching device 10.
- the switching device 10 receives a switching signal or a continuous input signal, whereby the microcomputer integrated in the switching device 10 receives a switching request of a system.
- This may be, for example, a pressure switch which signals an overshoot or undershoot of a specific pressure value of a pressure booster system.
- the signal input is suitable both for a switching signal and for a continuous input signal. This is realized by a corresponding input circuit within the switching device 10.
- the input assignment can be parameterized by an operating means and / or can be selected by dip-switches.
- the switching device 10 has further signal inputs and / or outputs, for example for communication with the frequency converter 20th
- the Fig. 2 shows a double pump assembly 1 with the centrifugal pump units 2, 3 of the Fig. 1 with the pumps 4, 5 and the drive motors 6, 7.
- the drive motors 6, 7 connected to the terminal boxes 8 and 9 and the terminals 16 and 18, respectively, lines 17 and 19 connected to the arranged on the drive motor 6 switching device 10.
- the switching device 10 in turn has a connection 12 for a first, multi-phase voltage network and a connection 13 for a second, multi-phase voltage network.
- Correspondingly designed lines 14 and 15 are connected to the connections 12 and 13 for connection to the voltage networks.
- the frequency converter 20 is arranged on the drive motor 7.
- the output voltage of the frequency converter 20 is guided by means of connection 24 to the frequency converter 20 and the line 15 to the terminal 13 of the switching device 10.
- the frequency converter 20 is electrically supplied by means of line 23, which is connected to terminal 21 of the switching device 10 and to terminal 22 of the frequency converter 20.
- FIGS. 1 and 2 Arrangements shown are also used in a twin pump assembly use, in which two centrifugal pumps have a common pump housing with a common suction and / or discharge nozzle.
- the switching device 10 is arranged, attached or mounted on one of the drive motors. According to the invention, the switching device may also be formed as part of one of the drive motors. It is understood that according to the invention, instead of a frequency converter, another speed control device or another device for generating a second voltage network, such as a network backup system, can be used.
- Fig. 3 shows a schematic diagram of a switching device 10. For reasons of clarity multiphase lines bundled therein are shown as a line. In a corresponding manner multipole switching means are shown simplified. Via terminal 12, the switching device 10 is connected to a polyphase, here three-phase voltage network fixed frequency. At the switching device 10, two drive motors 6 and 7 are connected to terminals 16 and 18. Via terminals 13 and 21, the switching device 10 is connected to a frequency converter 20 having terminals 22 and 24. Two each in the switching device 10 located and separately switchable switching means 31, 33 and 32, 34 switch the current flow to the drive motors 6 and 7 such that either the voltage of the first voltage network or the voltage of the frequency converter 20 is applied to the drive motor 6 and 7 respectively.
- the switching means 31 and 33 are the drive motor 6, the switching means 32 and 34 associated with the drive motor 7. Instead of the four switchable switching means 31, 32, 33, 34 per drive motor 6, 7 and a switching means in the manner of a changeover switch can be used.
- the switching means 31 connects in its closed state via a line 35 the connection 12 for the voltage network fixed frequency with the drive motor terminal 16 and thus leads the fixed frequency voltage to the drive motor 6.
- the switching means 33 connects in the closed state via a line 37th the connection 13 for the second voltage network with the drive motor terminal 16. In this way, the voltage of variable frequency, so the output voltage of the frequency converter 20, connectable to the drive motor 6.
- the drive motor 6 is selectively connectable to one of the two voltages.
- the switching means 32 connects in the closed state via a line 36 the connection 12 for the voltage network fixed frequency with the other drive motor terminal 18 and leads the voltage network fixed frequency to the other drive motor 7.
- the output voltage of the frequency converter 20 via the switching means 34 on the further drive motor 7 guided by the closed switching means 34 connects the terminal 13 via the line 38 to the terminal 18.
- the drive motor 7 is selectively connectable to one of the two voltages.
- switching means 31 32 mechanical contactors or semiconductor contactors can be used. But there are also other components used in engine branches and their combinations possible, including arrangements with motor protection switches, overload relays and / or contactor combinations for star-delta start-up or soft starters.
- switching means 33, 34 are preferably mechanical contactors are used.
- the switching means 31, 32, 33, 34 are controlled by a microcomputer integrated into the switching device 10. This is done by means indicated by arrows control lines.
- Each of the drive motors 6, 7 is thus, if necessary, connectable to the voltage network of fixed frequency or to the voltage network of variable frequency.
- the switching device 10 has means for passing the fixed frequency voltage. Via a line 39, this voltage is fed to the terminal 21.
- the terminal 21 is used for the electrical supply of the frequency converter 20 from the switching device 10 out. This saves a separate supply line, otherwise available on the installation side.
- the Fig. 4 shows somewhat more detailed the circuit design of a switching device 10. For reasons of clarity, the multiphase lines are bundled here and the switching means shown simplified.
- the switching device 10 has a microcomputer 40.
- the microcomputer 40 is electrically powered by a power supply.
- a signal input 46 is connected to the microcomputer 40.
- the signal input 46 serves to connect a means for signaling a switching request.
- a pressure switch may be connected, which supplies a switching signal when falling below or exceeding a certain pressure value at its installation location, for example in a pressure booster.
- control lines 41, 42, 43, 44 the four switching means 31, 32, 33, 34 are connected to the microcomputer and are controlled by this.
- a switching request such as a pump start request
- the microcomputer 40 of the switching device 10 controls the connection and disconnection of the drive motors 6 and 7 of the centrifugal pump units by connecting the drive motors 6 and 7 with the voltage networks or separates them.
- the microcomputer 40 may also control the change from a voltage network connected to a drive motor to another voltage network.
- the microcomputer 40 drives the frequency converter 20 by means of a communication line 47.
- the switching device 10 is thus able to control the frequency converter 20 by means of a start or stop command. Via the communication line 47, a ready and / or alarm signal from the frequency converter 20 to the microcomputer 40 led.
- the frequency converter 20 can request the connection of a further centrifugal pump unit in the microcomputer 40 as a function of system conditions.
- the switching device has a connection 50 for connecting the communication line 47.
- the communication line 47 may be a plurality of control lines or a bus system.
- the switching device 10 contains a means 51 for detecting the output voltage of the frequency converter 20.
- the means 51 may be a pulse width modulation detector, which constantly monitors the amplitudes of the three voltage phases and the microcomputer 40 is a binary signal, according to a good or fault condition, provides. With the pulse width modulation detector 51, for example, a phase failure at the output 13 of the frequency converter 20 can be detected.
- the switching device 10 has a display and control unit 53, which is connected to the microcomputer 40.
- the display and control unit 53 10 different engine operating modes of the drive motors 6 and 7 are adjustable to the switching device.
- the display and operating unit 53 has for each drive motor 6, 7 on an adjustment.
- the set engine operating modes are converted by the microcomputer 40 by controlling the switching means 31, 32, 33, 34 in corresponding switching operations.
- display means per drive motor are used as LEDs.
- the various operating states of the drive motors 6 and 7, such as "motor off", “motor on the frequency converter", or "motor on the grid” are displayed.
- the switching device 10 may further comprise a mode switch, with the other modes are selectable.
- switching delay times and / or different pump change modes can be selected.
- the choice of operation is also adjustable by appropriate program parameters in the microcomputer 40.
Description
Die Erfindung betrifft eine an einem Kreiselpumpenaggregat angeordnete Schaltvorrichtung nach dem Oberbegriff des Anspruchs 1, sowie eine Kreiselpumpenanordnung mit einer solchen Schaltvorrichtung und ein Verfahren zum Betrieb einer Kreiselpumpenanordnung.The invention relates to a arranged on a centrifugal pump assembly switching device according to the preamble of claim 1, and a centrifugal pump assembly with such a switching device and a method for operating a centrifugal pump assembly.
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Der Erfindung liegt das Problem zu Grunde, eine kostengünstige Schaltvorrichtung für eine Kreiselpumpenanordnung zu entwickeln, die bei bestimmten Mehrpumpenanordnungen, insbesondere bei einer Doppelpumpenanordnung, einen drehzahlfesten oder drehzahlgeregelten Betrieb der Kreiselpumpenaggregate bei geringem Verdrahtungsaufwand ermöglicht und einen ausfallsicheren Betrieb der Kreiselpumpenanordnung unterstützt.The invention is based on the problem of developing a cost-effective switching device for a centrifugal pump assembly, which in certain multi-pump arrangements, in particular in a double pump arrangement, a speed-proof or speed-controlled operation of the centrifugal pump units allows for low wiring and supports a fail-safe operation of the centrifugal pump assembly.
Die Lösung dieses Problems sieht vor, dass die Schaltvorrichtung mindestens einen weiteren Anschluss für einen weiteren Antriebsmotor und mindestens ein zusätzliches Schaltmittel aufweist, das den Stromfluss für den weiteren Antriebsmotoranschluss und/oder für den mindestens einen weiteren Antriebsmotor derart schaltet, dass der weitere Antriebsmotoranschluss und/oder der weitere Antriebsmotor mit dem Anschluss für das erste Spannungsnetz und/oder mit dem Anschluss für das zweite Spannungsnetz verbindbar ist. Erfindungsgemäß sind die Antriebsmotoranschlüsse und/oder die Antriebsmotoren je nach Anlagenerfordernissen individuell mit einem der Spannungsnetze verbindbar. Die Schaltvorrichtung ist an einen Antriebsmotor und/oder eine Kreiselpumpe eines Kreiselpumpenaggregates montierbar. Erfindungsgemäß kann eine Schaltvorrichtung nicht nur den Antriebsmotor, an dem die Schaltvorrichtung angeordnet ist, zwischen zwei Spannungsnetzen umschalten, sondern eine Umschaltung kann auch für weitere an die Schaltvorrichtung anschließbare Antriebsmotoren erfolgen. Eine an ein Kreiselpumpenaggregat montierte Schaltvorrichtung ist somit in der Lage, eine komplette Mehrpumpenanordnung zu steuern. Da die Schaltvorrichtung mit einem Anschluss für ein zweites Spannungsnetz versehen ist, sind die Kreiselpumpenaggregate einer mit einer solchen Schaltvorrichtung versehenen Kreiselpumpenanordnung mit verschiedenen Spannungsnetzen verbindbar.The solution to this problem provides that the switching device has at least one further connection for a further drive motor and at least one additional switching means which switches the current flow for the further drive motor connection and / or for the at least one further drive motor such that the further drive motor connection and / or or the further drive motor can be connected to the connection for the first voltage network and / or to the connection for the second voltage network. According to the invention, the drive motor connections and / or the drive motors can be individually connected to one of the voltage networks, depending on the system requirements. The switching device can be mounted on a drive motor and / or a centrifugal pump of a centrifugal pump assembly. According to the invention, a switching device can switch not only the drive motor on which the switching device is arranged between two voltage networks, but a switching can also be made for other connectable to the switching device drive motors. A mounted on a centrifugal pump assembly switching device is thus able to control a complete multi-pump assembly. Since the switching device is provided with a connection for a second voltage network, the centrifugal pump units of a centrifugal pump arrangement provided with such a switching device can be connected to different voltage networks.
Die Anordnung der Schaltvorrichtung an den Antriebsmotor spart Schaltschrankplatz ein und durch den integrierten Mikrorechner wird die Abhängigkeit von einer zentralen, übergeordneten Steuerung verhindert. Dies verbessert die Ausfallsicherheit einer solchen Kreiselpumpenanordnung.The arrangement of the switching device to the drive motor saves cabinet space and through the integrated microcomputer, the dependence on a central, higher-level control is prevented. This improves the reliability of such a centrifugal pump assembly.
Erfindungsgemäß ist vorgesehen, dass die Schaltvorrichtung Mittel zum Durchleiten des ersten Spannungsnetzes und einen Anschluss zur elektrischen Versorgung eines Gerätes zur Erzeugung des zweiten Spannungsnetzes aufweist. Damit ist eine elektrische Versorgung eines externen Gerätes, das zur Erzeugung des zweiten Spannungsnetzes dient, direkt aus der Schaltvorrichtung vorgesehen. Somit ist ein an die Schaltvorrichtung angeschlossener Frequenzumrichter direkt aus der Schaltvorrichtung elektrisch versorgbar. Ein separat zur Verfügung zu stellender Versorgungsabzweig für das Gerät zur Erzeugung des zweiten Spannungsnetzes entfällt. Es genügt eine Netzzuleitung an die Schaltvorrichtung.According to the invention, the switching device has means for passing the first voltage network and a connection for the electrical supply of a device for generating the second voltage network. This is an electrical supply of an external device that is used to generate the second voltage network serves, provided directly from the switching device. Thus, a frequency converter connected to the switching device can be supplied electrically directly from the switching device. A separately available supply branch for the device for generating the second voltage network is eliminated. It suffices a mains supply to the switching device.
Nach einer weiteren Ausgestaltung schaltet das Schaltmittel den Antriebsmotor zwischen verschiedenen Spannungsnetzen oder zwischen Spannungsnetzen mit fester und variabler Frequenz um. Durch die Umschaltung auf ein alternatives Spannungsnetz wird die Funktion der Kreiselpumpenaggregate auch bei Ausfall eines Spannungsnetzes gewährleistet.According to a further embodiment, the switching means switches the drive motor between different voltage networks or between voltage networks with fixed and variable frequency. By switching to an alternative voltage network, the function of the centrifugal pump units is ensured even in the event of a power grid failure.
Als vorteilhaft hat es sich erwiesen, den Anschluss der Schaltvorrichtung für ein zweites Spannungsnetz mit einem Frequenzumrichter zu verbinden, wobei der Frequenzumrichter über den Anschluss zur elektrischen Versorgung des Gerätes zur Erzeugung der zweiten Spannung elektrisch versorgt ist, mit jeweils zwei Schaltmitteln einen Antriebsmotor zwischen den Spannungsnetzen umzuschalten und den Mikrorechner, vorzugsweise mittels ein oder mehrerer Steuerleitungen oder eines Bussystems, mit dem Frequenzumrichter zu verbinden. Bei Verwendung von einem Schaltmittel, welches auch nach Art eines Wechselschalters wirken kann, ist nur ein unmittelbares Schalten möglich. Mit zwei Schaltmitteln kann der zeitliche Verlauf des Schaltvorganges individuell über den Mikrorechner an die jeweilige Situation angepasst werden. Eine Zu- oder Abschaltanforderung für ein Kreiselpumpenaggregat oder auch eine Umschaltanforderung zwischen verschiedenen Spannungsnetzen ist über eine Signalleitung oder ein Bussystem von einem Frequenzumrichter an die Schaltvorrichtung der Kreiselpumpenanordnung übertragbar. Dies ermöglicht den Aufbau einer Mehrpumpenanordnung mit temporärer Zuordnung der Frequenzumrichterspannung zu einzelnen Antriebsmotoren, die dadurch drehzahlgeregelt zu- oder abgeschaltet werden, bei gleichzeitig kurzen Anschlussleitungslängen.It has proven to be advantageous to connect the connection of the switching device for a second voltage network with a frequency converter, wherein the frequency converter is electrically supplied via the connection for electrical supply of the device for generating the second voltage, each with two switching means a drive motor between the voltage networks switch and connect the microcomputer, preferably by means of one or more control lines or a bus system to the frequency converter. When using a switching means, which may also act like a toggle switch, only an immediate switching is possible. With two switching means, the timing of the switching process can be individually adjusted via the microcomputer to the particular situation. A connection or disconnection request for a centrifugal pump assembly or a changeover request between different voltage networks can be transmitted via a signal line or a bus system from a frequency converter to the switching device of the centrifugal pump arrangement. This allows the construction of a multi-pump arrangement with temporary assignment of the frequency converter voltage to individual drive motors, which are thereby speed-controlled switched on or off, while short connecting cable lengths.
Ein Vorteil ergibt sich dadurch, dass bei einem Ausfall des Frequenzumrichters oder auch bei einem Fehler in der Signal- und/oder der Busverbindung der Mikrorechner ein oder mehrere Kreiselpumpenaggregate auf ein Spannungsnetz fester Frequenz schalten kann. Ein solcher, den Frequenzumrichter umgehender Betriebszustand, wird auch als Bypassbetrieb bezeichnet.An advantage results from the fact that in case of failure of the frequency converter or even in a fault in the signal and / or the bus connection of the microcomputer or several centrifugal pump units can switch to a voltage network fixed frequency. Such an operating condition bypassing the frequency converter is also referred to as a bypass mode.
Eine für eine Doppelpumpenanordnung, insbesondere Zwillingspumpenanordnung, vorgesehene Ausgestaltung sieht vor, dass an die Schaltvorrichtung zwei Antriebsmotoren angeschlossen sind und vier Schaltmittel die Antriebsmotoren zwischen den Spannungsnetzen umschalten. An eine Schaltvorrichtung sind dadurch zwei Antriebsmotoren anschließbar. Die Antriebsmotoren können dabei je nach Anlagenerfordernissen individuell mit der Spannung fester Frequenz oder mit der Frequenzumrichterspannung verbunden werden. In entsprechender Art und Weise sind erfindungsgemäß Schaltvorrichtungen für weitere Mehrpumpenanordnungen vorgesehen.An embodiment provided for a double pump arrangement, in particular a twin pump arrangement, provides that two drive motors are connected to the switching device and four switching means switch the drive motors between the voltage networks. To a switching device thereby two drive motors can be connected. Depending on the system requirements, the drive motors can be individually connected to the fixed frequency voltage or to the frequency converter voltage. In a corresponding manner switching devices for further multi-pump arrangements are provided according to the invention.
Nach einer weiteren Ausgestaltung besitzt die Schaltvorrichtung Mittel zur Erfassung und/oder Speicherung von Motorstrom-, Motorspannungs- und/oder von Leistungsfaktorwerten. Durch eine Aufzeichnung und/oder Überwachung von Leistungsdaten ist eine zusätzliche Motorüberwachung möglich.According to a further embodiment, the switching device has means for detecting and / or storing motor current, motor voltage and / or power factor values. By recording and / or monitoring performance data, additional engine monitoring is possible.
Es ist weiterhin vorgesehen, dass die Schaltvorrichtung Mittel für Überwachungs- und/oder Diagnosefunktionen aufweist. So können verschiedene pumpen- und/oder antriebsrelevante Größen erfasst, ermittelt und überwacht werden. Insbesondere ist eine Überwachung der Spannungsamplituden der Frequenzumrichterspannung vorgesehen, womit eine Fehlfunktion des Frequenzumrichters erkannt wird. Dazu dient ein in der Schaltvorrichtung vorgesehenes Pulsweitenmodulationsüberwachungsmodul. Dessen Signal signalisiert das Fehlen einer oder mehrerer Spannungsphasen und wird vom Mikrorechner ausgewertet, wodurch ein zusätzlicher Motorschutz erreicht ist. Darüber hinaus kann die Schaltvorrichtung Bedien-/Eingabemittel und/oder Anzeige-/Ausgabemittel aufweisen. Als Beispiele für Bedien-/Eingabemittel seien Eingabetasten, Dip-Switches, Signaleingänge, als Beispiele für Anzeige-/Ausgabemittel Display, mehrfarbige LED's, Signal- und Relaisausgänge genannt.It is further contemplated that the switching device comprises means for monitoring and / or diagnostic functions. This means that different pump and / or drive-related variables can be recorded, determined and monitored. In particular, a monitoring of the voltage amplitudes of the frequency converter voltage is provided, whereby a malfunction of the frequency converter is detected. The purpose of this is provided in the switching device provided pulse width modulation monitoring module. Its signal indicates the absence of one or more voltage phases and is evaluated by the microcomputer, whereby an additional motor protection is achieved. In addition, the switching device may comprise operating / input means and / or display / output means. Examples of operating / input means include input keys, dip switches, signal inputs, as examples of display / output means display, multi-color LEDs, signal and relay outputs.
Gemäß einer Ausgestaltung ermittelt eine Synchronisationseinheit zwischen zwei Spannungsnetzen mit fester und/oder variabler Frequenz die jeweiligen Phasen- und Frequenzlagen und bei einer Gleichheit von Phasen- und Frequenzlagen fließt ein Synchronisationssignal an einen Mikrorechner und schaltet ein Kreiselpumpenaggregat um. Dadurch kann eine Umschaltung von einem Spannungsnetz auf ein anderes Spannungsnetz erfolgen, wobei die Bildung von unerwünschten Druckstößen oder Pulsationen im Rohrleitungssystem vermieden wird.According to one embodiment, a synchronization unit determines the respective phase and frequency positions between two voltage networks with fixed and / or variable frequency, and with equality of phase and frequency positions, a synchronization signal flows to a microcomputer and switches over a centrifugal pump unit. This allows a switch from one voltage network to another voltage network, whereby the formation of undesired pressure surges or pulsations in the pipeline system is avoided.
Weiterhin kann die Schaltvorrichtung Mittel zur Steuerung eines Frequenzumrichters aufweisen. Damit kann eine Schaltvorrichtung Start, Stopp und/oder die Frequenz eines Frequenzumrichters steuern.Furthermore, the switching device may comprise means for controlling a frequency converter. Thus, a switching device control start, stop and / or the frequency of a frequency converter.
Nach der Erfindung ist eine Kreiselpumpenanordnung mit mindestens zwei Kreiselpumpenaggregaten, jeweils bestehend aus Pumpe und Motor, mit einer erfindungsgemäßen Schaltvorrichtung ausgestattet. Die Schaltvorrichtung ist mit den Antriebsmotoren, insbesondere über einen jeweils an einem Antriebsmotor befindlichen Klemmenkasten, elektrisch verbunden.According to the invention, a centrifugal pump assembly with at least two centrifugal pump units, each consisting of pump and motor, equipped with a switching device according to the invention. The switching device is electrically connected to the drive motors, in particular via a respective terminal box located on a drive motor.
Es hat sich als zweckmäßig erwiesen, dass die Schaltvorrichtung an einem der Antriebsmotoren angeordnet ist. Die motormontierte Schaltvorrichtung kann dazu mittels einer Haltevorrichtung an dem Antriebsmotor befestigt sein. Alternativ ist die Schaltvorrichtung als Bestandteil eines der Antriebsmotoren ausgebildet.It has proved to be expedient that the switching device is arranged on one of the drive motors. The motor-mounted switching device can be attached by means of a holding device to the drive motor. Alternatively, the switching device is formed as part of one of the drive motors.
Eine Ausgestaltung betrifft eine Kreiselpumpenanordnung mit einem an der Schaltvorrichtung angeschlossenen, insbesondere an der Schaltvorrichtung und/oder an einem Antriebsmotor angeordneten, Frequenzumrichter.One embodiment relates to a centrifugal pump arrangement with a frequency converter connected to the switching device, in particular arranged on the switching device and / or on a drive motor.
Besonders erwähnt sei eine Doppelpumpenanordnung mit zwei Kreiselpumpenaggregaten mit einer Schaltvorrichtung, an die zwei Antriebsmotoren angeschlossen sind und vier Schaltmittel die Antriebsmotoren zwischen den Spannungsnetzen umschalten, wobei die Schaltvorrichtung an einem der beiden Antriebsmotoren und der Frequenzumrichter an der Schaltvorrichtung und/oder am anderen der beiden Antriebsmotoren angeordnet ist. Als eine spezielle Doppelpumpenanordnung liegt insbesondere eine Zwillingspumpenanordnung, bei der die Pumpen ein gemeinsames Pumpengehäuse mit einem gemeinsamen Saug- und/oder Druckstutzen aufweisen, im Rahmen der Erfindung.Particularly noteworthy is a double pump arrangement with two centrifugal pump units with a switching device to which two drive motors are connected and four switching means to switch the drive motors between the voltage networks, wherein the switching device on one of the two drive motors and the frequency converter to the switching device and / or the other of the two drive motors disposed is. As a special double pump arrangement is in particular a twin pump arrangement, in which the pumps have a common pump housing with a common suction and / or discharge nozzle, in the context of the invention.
Ebenfalls ist vorgesehen, mehrere, gegebenenfalls verschiedene, solcher Kreiselpumpenanordnungen miteinander und/oder mit anderen Kreiselpumpenanordnungen zu kombinieren.It is also envisaged to combine several, possibly different, such centrifugal pump arrangements with each other and / or with other centrifugal pump arrangements.
In einer Mehrpumpenanordnung können mehrere Schaltvorrichtungen Verwendung finden, die jeweils mindestens zwei Kreiselpumpenaggregate an die Spannungsnetze schalten. Auch eine Kombination mit Kreiselpumpenaggregaten, die mit einer anderen Schaltvorrichtung, die eine oder mehrere Kreiselpumpenaggregate schaltet, ausgestattet sind, ist vorgesehen. Insbesondere ist eine Kombination vorgesehen mit Kreiselpumpenaggregaten, die mit einer Schaltvorrichtung gemäß der
Ein vorteilhaftes Verfahren zum Betrieb einer erfindungsgemäßen Kreiselpumpenanordnung sieht vor, dass der Mikrorechner ein oder mehrere Eingangssignale auswertet und die Zu- oder Abschaltung der Kreiselpumpenaggregate steuert. So kann der Mikrorechner der Schaltvorrichtung die Zu- und Abschaltung der Kreiselpumpenaggregate steuern. Der Mikrorechner kann auch den Wechsel von einem mit einem Antriebsmotor verbundenen Spannungsnetz auf ein anderes Spannungsnetz steuern. Erfindungsgemäß werden die Antriebsmotoranschlüsse und/oder die Antriebsmotoren je nach Anlagenerfordernissen individuell mit einem der Spannungsnetze verbunden.An advantageous method for operating a centrifugal pump arrangement according to the invention provides that the microcomputer evaluates one or more input signals and controls the connection or disconnection of the centrifugal pump units. Thus, the microcomputer of the switching device can control the activation and deactivation of the centrifugal pump units. The microcomputer can also control the change from a voltage network connected to a drive motor to another voltage network. According to the invention, the drive motor connections and / or the drive motors are individually connected to one of the voltage networks depending on the system requirements.
Außerdem wird vorgeschlagen, dass der Mikrorechner mit Signalen eines Gerätes zur Erzeugung des zweiten Spannungsnetzes, insbesondere eines Frequenzumrichters, den Betrieb von einem oder mehreren Kreiselpumpenaggregaten steuert. Dies können beispielsweise ein Anforderungssignal für ein weiteres Kreiselpumpenaggregat, ein Bereitschaftssignal oder ein Alarmsignal sein. Zusätzlich ist vorgesehen, dass der Mikrorechner ein Gerät zur Erzeugung des zweiten Spannungsnetzes, insbesondere einen Frequenzumrichter steuert. Es ist vorgesehen, dass der Mikrorechner das Gerät zur Erzeugung des zweiten Spannungsnetzes oder den Frequenzumrichter mit einem Start- oder Stoppsignal steuert.It is also proposed that the microcomputer with signals of a device for generating the second voltage network, in particular a frequency converter, controls the operation of one or more centrifugal pump units. This can be, for example, a request signal for a further centrifugal pump assembly, a ready signal or an alarm signal. In addition, it is provided that the microcomputer controls a device for generating the second voltage network, in particular a frequency converter. It is envisaged that the microcomputer controls the device for generating the second voltage network or the frequency converter with a start or stop signal.
Es ist weiterhin vorgesehen, dass die Schaltvorrichtung pumpen- und/oder antriebsrelevante Überwachungs- und/oder Diagnosefunktionen durchführt. Der Mikrorechner ist dazu in der Lage, Messwerte zu erfassen, zu verarbeiten und zu speichern.It is further provided that the switching device performs pump and / or drive-relevant monitoring and / or diagnostic functions. The microcomputer is capable of acquiring, processing and storing measured values.
Bei Anwendungen, für die eine Leistungsüberwachung der Antriebsmotoren erforderlich ist, hat sich ein Verfahren bewährt, wonach der Mikrorechner eine Leistungsaufzeichnung und/oder -überwachung durchführt. Dies erfolgt durch Auswertung der in der Schaltvorrichtung fließenden Ströme und Spannungen der Motoren.In applications requiring performance monitoring of the drive motors, a technique has been found whereby the microcomputer performs power recording and / or monitoring. This is done by evaluating the currents and voltages of the motors flowing in the switching device.
Als Basis für eine Überwachung und/oder eine Diagnose eines Kreiselpumpenaggregates sind Histogramme mit über die Laufzeit eines Kreiselpumpenaggregates kumulierten Leistungs- und/oder Durchflusswerten vorgesehen. Durch die Erfindung sind so relevante Daten mehrerer Kreiselpumpenaggregate jederzeit und direkt an einer Kreiselpumpenanordnung verfügbar.As a basis for monitoring and / or diagnosing a centrifugal pump assembly histograms are provided with cumulative over the life of a centrifugal pump unit performance and / or flow values. As a result of the invention, relevant data of several centrifugal pump units are available at any time and directly at a centrifugal pump arrangement.
Ein vorteilhaftes Verfahren sieht vor, dass die Ausgangsspannung des Geräts zur Erzeugung der zweiten Spannung, insbesondere des Frequenzumrichters, überwacht wird. Vorzugsweise wird eine Pulsweitenmodulationsüberwachung durchgeführt. Dadurch wird das Fehlen einer oder mehrerer Spannungsphasen der Ausgangsspannung des Frequenzumrichters detektiert. Idealerweise wertet der Mikrorechner ein Ergebnis dieser Überwachung, das beispielsweise in Form eines binären Pulsweitenmodulationssignals vorliegt, aus und berücksichtigt es bei der Ansteuerung der Schaltmittel. Dadurch wird beispielsweise vermieden, dass ein Antriebsmotor mit einer Frequenzumrichterspannung mit einer fehlenden Phase betrieben wird. Neben einer Überwachung der Spannung des zweiten Spannungsnetzes ist somit ein wirksamer Motorschutz realisiert.An advantageous method provides that the output voltage of the device for generating the second voltage, in particular the frequency converter, is monitored. Preferably, a pulse width modulation monitoring is performed. As a result, the absence of one or more voltage phases of the output voltage of the frequency converter is detected. Ideally, the microcomputer evaluates a result of this monitoring, which is present for example in the form of a binary pulse width modulation signal, and takes it into account in the control of the switching means. This avoids, for example, that a drive motor is operated with a frequency converter voltage with a missing phase. In addition to monitoring the voltage of the second voltage network thus an effective motor protection is realized.
Bei einer Mehrpumpenanordnung mit mehreren Schaltvorrichtungen kann eine der Schaltvorrichtungen als eine vorrangige Schaltvorrichtung ausgebildet sein. Der Mikrorechner einer Schaltvorrichtung kann die Zu- und Abschaltung von weiteren Kreiselpumpenaggregaten steuern und/oder über das Bussystem deren Zu- oder Abschaltung anfordern.In a multiple pump arrangement having a plurality of switching devices, one of the switching devices may be configured as a priority switching device. The microcomputer of a switching device can control the activation and deactivation of further centrifugal pump units and / or request their connection or disconnection via the bus system.
Vorzugsweise schaltet der Mikrorechner mit einem Synchronisationssignal die Antriebsmotoren zwischen verschiedenen Spannungsnetzen bei gleichen Phasen- und Frequenzlagen der Spannungsnetze um. Umschaltbedingte Spannungsdifferenzen, Stromspitzen und daraus resultierende Druckstöße im Rohrleitungssystem werden dadurch verhindert. Eine Umschaltung der Antriebsmotoren auf ein anderes Spannungsnetz kann derartig erfolgen, dass in der Schaltvorrichtung das mit einem Antriebsmotor verbundene Spannungsnetz erst nach erfolgter Zuschaltung des anderen Spannungsnetzes abgetrennt wird.The microcomputer preferably uses a synchronization signal to switch the drive motors between different voltage networks at the same phase and frequency positions of the voltage networks. Switchover-related voltage differences, current peaks and resulting pressure surges in the pipeline system are thereby prevented. A switchover of the drive motors to another voltage network can take place in such a way that in the switching device, the voltage network connected to a drive motor is disconnected only after the connection of the other voltage network.
Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden im Folgenden näher beschrieben. Es zeigen die
- Fig. 1
- eine Doppelpumpenanordnung mit zwei Kreiselpumpenaggregaten, einer Schaltvorrichtung und einem Frequenzumrichter, die
- Fig. 2
- eine Doppelpumpenanordnung mit einer alternativen Anordnung von Schaltvorrichtung und Frequenzumrichter, die
- Fig. 3
- ein Prinzipschaltbild einer Schaltvorrichtung, und die
- Fig. 4
- den schaltungstechnischen Aufbau einer Schaltvorrichtung.
- Fig. 1
- a double pump arrangement with two centrifugal pump units, a switching device and a frequency converter, the
- Fig. 2
- a double pump arrangement with an alternative arrangement of switching device and frequency converter, the
- Fig. 3
- a schematic diagram of a switching device, and the
- Fig. 4
- the circuit design of a switching device.
Die
Die Schaltvorrichtung 10 weist einen weiteren Anschluss 18 für einen weiteren Antriebsmotor 7 auf, der mittels einer an dessen Klemmenkasten 9 angeschlossenen Leitung 19 mit der Schaltvorrichtung 10 verbunden ist. Durch in der Schaltvorrichtung 10 angeordnete, zusätzliche Schaltmittel ist diese in der Lage, den Stromfluss für den weiteren Antriebsmotor 7 derart zu schalten, dass der weitere Antriebsmotor 7 mit dem Anschluss 12 für das erste Spannungsnetz und/oder mit dem Anschluss 13 für das zweite Spannungsnetz verbindbar ist. An der Schaltvorrichtung 10 ist ein Frequenzumrichter 20 angeordnet oder befestigt. Mittels eines Anschlusses 21 an der Schaltvorrichtung 10, einem Anschluss 22 am Frequenzumrichter 20 und einer Leitung 23 wird der Frequenzumrichter 20 aus der Schaltvorrichtung 10 elektrisch versorgt. Der Frequenzumrichter 20 erzeugt ein zweites Spannungsnetz mit einer variablen Frequenz. Die Ausgangsspannung des Frequenzumrichters 20 ist mittels eines Anschlusses 24 und einer Leitung 15 auf den Anschluss 13 der Schaltvorrichtung 10 geführt.The switching
Über einen hier nicht dargestellten Signaleingang an der Schaltvorrichtung 10 erhält die Schaltvorrichtung 10 ein Schaltsignal oder auch ein kontinuierliches Eingangssignal, womit der in der Schaltvorrichtung 10 integrierte Mikrorechner eine Schaltanforderung einer Anlage erhält. Es kann sich dabei beispielsweise um einen Druckschalter handeln, der eine Über- oder Unterschreitung eines bestimmten Druckwertes einer Druckerhöhungsanlage signalisiert. Der Signaleingang eignet sich sowohl für ein Schaltsignal als auch für ein kontinuierliches Eingangssignal. Dies ist durch eine entsprechende Eingangsbeschaltung innerhalb der Schaltvorrichtung 10 realisiert. Die Eingangsbelegung ist durch ein Bedienmittel parametrierbar und/oder per Dip-Switches auswählbar gestaltet. Die Schaltvorrichtung 10 besitzt weitere Signalein- und/oder -ausgänge, beispielsweise zur Kommunikation mit dem Frequenzumrichter 20.Via a signal input, not shown here, on the
Die
Bei dieser Doppelpumpenanordnung ist der Frequenzumrichter 20 am Antriebsmotor 7 angeordnet. Die Ausgangsspannung des Frequenzumrichters 20 ist mittels Anschluss 24 am Frequenzumrichter 20 und der Leitung 15 auf den Anschluss 13 der Schaltvorrichtung 10 geführt. Der Frequenzumrichter 20 wird mittels Leitung 23, die an Anschluss 21 der Schaltvorrichtung 10 und an Anschluss 22 des Frequenzumrichters 20 angeschlossen ist, elektrisch versorgt. Die Anordnung von Schaltvorrichtung und Frequenzumrichter an verschiedenen Aggregaten weist konstruktive Vorteile auf. Darüber hinaus wird durch eine solche Anordnung ein für die Anordnung verfügbarer oder notwendiger Bauraum optimiert.In this double pump arrangement, the
Die in den
Als Schaltmittel 31, 32 können mechanische Schütze oder Halbleiterschütze zum Einsatz kommen. Es sind aber auch andere in Motorabzweigen verwendete Komponenten und deren Kombinationen möglich, so auch Anordnungen mit Motorschutzschaltern, Überlastrelais und/oder Schützkombinationen für Stern-Dreieck-Anlauf oder Softstartern. Als Schaltmittel 33, 34 kommen vorzugsweise mechanische Schütze zum Einsatz.As switching means 31, 32 mechanical contactors or semiconductor contactors can be used. But there are also other components used in engine branches and their combinations possible, including arrangements with motor protection switches, overload relays and / or contactor combinations for star-delta start-up or soft starters. As switching means 33, 34 are preferably mechanical contactors are used.
Die Schaltmittel 31, 32, 33, 34 werden von einem in die Schaltvorrichtung 10 integrierten Mikrorechner gesteuert. Dies erfolgt mittels durch Pfeile angedeuteten Steuerleitungen. Jeder der Antriebsmotoren 6, 7 ist somit bedarfsweise mit dem Spannungsnetz fester Frequenz oder mit dem Spannungsnetz variabler Frequenz verbindbar.The switching means 31, 32, 33, 34 are controlled by a microcomputer integrated into the switching
Die Schaltvorrichtung 10 besitzt Mittel zum Durchleiten der Spannung fester Frequenz. Über eine Leitung 39 ist diese Spannung an den Anschluss 21 geführt. Der Anschluss 21 dient der elektrischen Versorgung des Frequenzumrichters 20 aus der Schaltvorrichtung 10 heraus. Dadurch wird eine separate, ansonsten anlagenseitig zur Verfügung zu stellende Versorgungsleitung eingespart.The switching
Die
Weiterhin steuert der Mikrorechner 40 den Frequenzumrichter 20 mittels einer Kommunikationsleitung 47 an. Die Schaltvorrichtung 10 ist damit in der Lage, mittels Start- oder Stoppbefehl den Frequenzumrichter 20 zu steuern. Über die Kommunikationsleitung 47 wird ein Bereitschafts- und/oder Alarmsignal vom Frequenzumrichter 20 zum Mikrorechner 40 geführt. Mittels der Kommunikationsleitung 47 kann der Frequenzumrichter 20 bei dem Mikrorechner 40 in Abhängigkeit von Anlagenbedingungen die Zuschaltung eines weiteren Kreiselpumpenaggregates anfordern. Die Schaltvorrichtung weist zum Anschluss der Kommunikationsleitung 47 einen Anschluss 50 auf. Bei der Kommunikationsleitung 47 kann es sich um mehrere Steuerleitungen oder um ein Bussystem handeln. Die Schaltvorrichtung 10 enthält ein Mittel 51 zur Detektion der Ausgangsspannung des Frequenzumrichters 20. Bei dem Mittel 51 kann es sich um einen Pulsweitenmodulationsdetektor handeln, der ständig die Amplituden der drei Spannungsphasen überwacht und dem Mikrorechner 40 ein binäres Signal, entsprechend einem Gut- oder Fehlerzustand, zur Verfügung stellt. Mit dem Pulsweitenmodulationsdetektor 51 kann beispielsweise ein Phasenausfall am Ausgang 13 des Frequenzumrichters 20 festgestellt werden.Furthermore, the
Die Schaltvorrichtung 10 weist eine Anzeige- und Bedieneinheit 53 auf, die mit dem Mikrorechner 40 verbunden ist. Durch die Anzeige- und Bedieneinheit 53 sind an der Schaltvorrichtung 10 verschiedene Motorbetriebsarten der Antriebmotoren 6 und 7 einstellbar. Die Anzeige- und Bedieneinheit 53 weist dazu pro Antriebsmotor 6, 7 ein Einstellmittel auf. Die eingestellten Motorbetriebsarten werden vom Mikrorechner 40 durch Ansteuern der Schaltmittel 31, 32, 33, 34 in entsprechende Schalthandlungen umgesetzt. Zur Anzeige des Betriebszustands der an die Schaltvorrichtung 10 angeschlossenen Antriebsmotoren 6 und 7 dienen beispielsweise als LED 's ausgeführte Anzeigemittel pro Antriebsmotor. Durch drei verschiedene Farben und/oder Blinkhäufigkeiten der Anzeigemittel werden die verschiedenen Betriebszustände der Antriebsmotoren 6 und 7, wie "Motor aus", "Motor am Frequenzumrichter", oder "Motor am Netz" angezeigt. Die Schaltvorrichtung 10 kann darüber hinaus einen Betriebsartschalter aufweisen, mit dem weitere Betriebsarten wählbar sind. Damit können beispielsweise Schaltverzögerungszeiten und/oder verschiedene Pumpenwechselmodi gewählt werden. Ebenso ist die Wahl der Betriebsweise auch durch entsprechende Programmparameter im Mikrorechner 40 einstellbar.The switching
Claims (18)
- Switching device which is arranged on a centrifugal pump unit, wherein the switching device switches a drive motor with at least one switching means controlled by a microcomputer and is provided with a connection for a first power network of fixed frequency and with a connection for a second power network of variable frequency, wherein the microcomputer is integrated into the switching device, the switching device is provided with at least one signal input and the microcomputer is connected to the signal input, wherein the switching device switches the current flow for a drive motor connection, arranged at the switching device, and/or the drive motor, in such a way that the drive motor connection and/or the drive motor can be connected to the connection for the first power network and/or to the connection for the second power network, wherein the switching device (10) has at least one further connection (18) for a further drive motor (7) and at least one additional switching means (32, 34) which switches the current flow for the further drive motor connection (18) and/or for the further drive motor (7) in such a way that the further drive motor connection (18) and/or the further drive motor (7) can be connected to the connection for the first power network (12) and/or to the connection for the second power network (13),
characterized in that
the switching device (10) has means for connecting through the first power network and a connection for electrically supplying a device for generating the second power network (21). - Switching device according to Claim 1, characterized in that the switching means (31, 32, 33, 34) switch over the drive motors (6, 7) between power networks with a fixed frequency and power networks with a variable frequency.
- Switching device according to Claim 1 or 2, characterized in that the switching device (10) is connected to a frequency converter (20) at the connection for the second power network (13) and at the connection for electrically supplying the device for generating the second voltage (21), in that in each case two switching means (31, 32, 33, 34) switch over a drive motor (6, 7) between the power networks, and in that the microcomputer (40) is connected to the frequency converter (20).
- Switching device according to Claim 3, characterized in that two drive motors (6, 7) are connected to the switching device (10) and four switching means (31, 32, 33, 34) switch over the drive motors (6, 7) between the power networks.
- Switching device according to one of Claims 1 to 4, characterized in that the switching device (10) has means for monitoring functions and/or diagnostic functions.
- Switching device according to one of Claims 1 to 5, characterized in that the switching device (10) has means for controlling a frequency converter (20).
- Centrifugal pump arrangement having at least two centrifugal pump units (2, 3) composed of a pump (4, 5) and a drive motor (6, 7), characterized by a switching device (10) according to one of Claims 1 to 6, wherein the switching device (10) is electrically connected to the drive motors (6, 7), in particular via a terminal box (8, 9) which is respectively located at a drive motor (6, 7).
- Centrifugal pump arrangement according to Claim 7, characterized in that the switching device (10) is arranged on one of the drive motors (6, 7) and/or is embodied as a component of one of the drive motors (6, 7).
- Centrifugal pump arrangement according to Claim 7 or 8, characterized by a frequency converter (20) which is connected to the switching device (10) and is arranged, in particular, on the switching device (10) and/or on a drive motor (6, 7).
- Double pump arrangement having two centrifugal pump units (2, 3) composed of a pump (4, 5) and a drive motor (6, 7), characterized by a switching device (10) according to Claim 4, wherein the switching device (10) is arranged on one of the two drive motors (6, 7), and the frequency converter (20) is arranged on the switching device (10) or on the other of the two drive motors (6, 7).
- Double pump arrangement according to Claim 10, characterized in that the pumps (4, 5) have a common pump housing with a common suction connector and/or pressure connector.
- Method for operating a centrifugal pump arrangement according to one of Claims 7 to 11, characterized in that the microcomputer (40) evaluates one or more input signals and controls the activation or deactivation of the centrifugal pump units (2, 3).
- Method according to Claim 12, characterized in that the microcomputer (40) controls the changeover from one power network connected to drive motor (6, 7) to another power network.
- Method according to Claim 12 or 13, characterized in that the microcomputer (40) controls the operation of one or more centrifugal pump units (2, 3) with signals of a device for generating the second power network, in particular a frequency converter (20).
- Method according to Claim 12, 13 or 14, characterized in that the microcomputer (40) controls a device for generating the second power network, in particular a frequency converter (20).
- Method according to one of Claims 12 to 15, characterized in that the switching device (10) carries out pump-related and/or drive-related monitoring functions and/or diagnostic functions.
- Method according to Claim 16, characterized in that the microcomputer (40) carries out power monitoring.
- Method according to Claim 16 or 17, characterized in that the output voltage of the device for generating the second power network, in particular the frequency converter (20), is monitored.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009043556A DE102009043556B3 (en) | 2009-09-30 | 2009-09-30 | Centrifugal pump unit with switching device |
PCT/EP2010/064337 WO2011039166A1 (en) | 2009-09-30 | 2010-09-28 | Centrifugal pump unit having a switching device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2483564A1 EP2483564A1 (en) | 2012-08-08 |
EP2483564B1 true EP2483564B1 (en) | 2016-11-16 |
Family
ID=43123174
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10760992.7A Not-in-force EP2483564B1 (en) | 2009-09-30 | 2010-09-28 | Turbo pump power supply unit with switching device |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2483564B1 (en) |
BR (1) | BR112012006426A8 (en) |
DE (1) | DE102009043556B3 (en) |
WO (1) | WO2011039166A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6581806B2 (en) * | 2015-05-18 | 2019-09-25 | 株式会社川本製作所 | Pump unit, water supply device |
DE102016119207B4 (en) * | 2016-10-10 | 2020-03-12 | Nolta Gmbh | Pump control device, pump device, waste water treatment system and a method for operating at least two pumps |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060072262A1 (en) * | 2004-09-28 | 2006-04-06 | American Power Conversion Corporation | System and method for allocating power to loads |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2756916C2 (en) * | 1977-12-21 | 1985-09-26 | Danfoss A/S, Nordborg | Device for setting up the delivery rate of a waterworks pump arrangement |
US5522707A (en) * | 1994-11-16 | 1996-06-04 | Metropolitan Industries, Inc. | Variable frequency drive system for fluid delivery system |
DE19511170A1 (en) * | 1995-03-28 | 1996-10-02 | Wilo Gmbh | Double pump with higher-level control |
DE19742799B4 (en) * | 1997-09-27 | 2006-10-05 | Ksb Ag | Automatic adjustment of the adjustment range of a pressure control loop in multi-pump systems |
DE10331578B4 (en) * | 2003-07-11 | 2006-01-12 | Spechtenhauser Pumpen Gmbh | Wastewater pump system with several Kanalradpumpenaggregaten |
JP4431519B2 (en) * | 2005-04-11 | 2010-03-17 | 日立Geニュークリア・エナジー株式会社 | Reactor coolant recirculation pump power supply |
DE102006018025A1 (en) * | 2006-04-19 | 2007-10-25 | Ksb Aktiengesellschaft | Centrifugal pump unit with switching device |
-
2009
- 2009-09-30 DE DE102009043556A patent/DE102009043556B3/en active Active
-
2010
- 2010-09-28 BR BR112012006426A patent/BR112012006426A8/en not_active Application Discontinuation
- 2010-09-28 WO PCT/EP2010/064337 patent/WO2011039166A1/en active Application Filing
- 2010-09-28 EP EP10760992.7A patent/EP2483564B1/en not_active Not-in-force
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060072262A1 (en) * | 2004-09-28 | 2006-04-06 | American Power Conversion Corporation | System and method for allocating power to loads |
Also Published As
Publication number | Publication date |
---|---|
EP2483564A1 (en) | 2012-08-08 |
WO2011039166A1 (en) | 2011-04-07 |
BR112012006426A8 (en) | 2018-07-31 |
DE102009043556B3 (en) | 2010-12-23 |
BR112012006426A2 (en) | 2016-04-19 |
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