WO1993020613A1 - Convertisseur statique de frequence avec moniteur de circuit intermediaire - Google Patents

Convertisseur statique de frequence avec moniteur de circuit intermediaire Download PDF

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Publication number
WO1993020613A1
WO1993020613A1 PCT/DE1993/000250 DE9300250W WO9320613A1 WO 1993020613 A1 WO1993020613 A1 WO 1993020613A1 DE 9300250 W DE9300250 W DE 9300250W WO 9320613 A1 WO9320613 A1 WO 9320613A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
signal line
current
converter according
indicates
Prior art date
Application number
PCT/DE1993/000250
Other languages
German (de)
English (en)
Inventor
Eberhard Hoefflin
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to JP5516958A priority Critical patent/JPH06508500A/ja
Publication of WO1993020613A1 publication Critical patent/WO1993020613A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors

Definitions

  • the invention is based on an arrangement according to the type of the main claim.
  • One such is known from DE-OS 31 13 909.
  • the arrangement described therein has, according to FIG. 1, a mains rectifier 14, an intermediate circuit of constant DC voltage, and several inverters 13 fed by it.
  • a capacitor is provided to stabilize the DC link voltage.
  • the line rectifier is preferably uncontrolled.
  • the inverters are controlled by a common control logic 20, all the motors supplied by the inverters run at the same speed. Each inverter feeds a number of individual drive motors that are only assigned to it. From the document, the proposal is known to equip several inverters, each with its own control logic.
  • the document also points out that in the event of a power failure due to the different stopping behavior of individual drives, energy is shifted via the intermediate circuit in such a way that all drives nevertheless come to a standstill at approximately the same time. Measures to actively regulate the DC link voltage and / or to improve the behavior of the individual drives are not apparent from the document. However, if inverters supplied by the same intermediate circuit are operated independently of one another (such as in the case of servo drives), the current operating states of the individual drives act on the intermediate circuit and lead to voltage fluctuations there. These in turn adversely affect the operating behavior of the drives.
  • a converter arrangement according to the invention has an arrangement for stabilizing the overall operating behavior, which makes it possible to stabilize the DC link voltage and at the same time to adapt the operation of the individual drives to the current DC link voltage in each case.
  • Continuous knowledge of the power requirements of the individual drives enables precise regulation of the DC link voltage on the rectifier side.
  • every drive is continuously aware of the current DC link voltage. This allows the operating behavior of the individual drives to be improved.
  • the converter arrangement according to the invention is simple in construction, it essentially contains an additional signal line.
  • the complex measurement of the DC link voltage is only required once, and at the same time the smoothing capacitance in the DC link can be dimensioned smaller by the improved voltage control, which results in a cost advantage.
  • Already considering only those drives whose performance changes per unit of time have large values provides good results.
  • control of the individual drives is expediently carried out in such a way that the required or output power is adapted at any time to the current energy output or absorption capacity of the intermediate circuit.
  • the figure shows a schematic diagram of the arrangement according to the invention.
  • the block diagram of a converter arrangement shown in the figure can be functionally divided into two main parts: a power circuit with the elements labeled 10 to 13 and a control circuit 40 with the elements labeled 14 to 30.
  • the structure of the power circuit is known per se.
  • This supplies a plurality of inverters 12 with DC voltage.
  • the essential components of the inverters 12 are six power transistors (not shown), two of which each generate a phase of the drive-side output current. They are controlled by the pulse width modulation method from a respectively assigned control unit 14.
  • Converter arrangements of the type described above can be found, for example, in multi-axis, numerically controlled machine tools.
  • the second main part of the converter arrangement according to the invention is the control circuit 40.
  • the inverter control unit 14, the mains rectifier unit 15, and a DC voltage source 21 with an associated measuring device 23 on the intermediate circuit are assigned, furthermore one between the inverter control units 14, the rectifier control unit 15 and one Main arrangement (not shown here) arranged line arrangement 30, and above all a signal line 20 arranged parallel to the power circuit, regardless of the potential of the intermediate circuit.
  • the latter is of essential importance for the present invention. It connects in series a DC voltage source 21 to at least one inverter control unit 14 and to the rectifier control unit 15.
  • the individual components of the control circuit are explained in more detail below.
  • the main components of the inverter control units 14 connected to the signal line 20 are a control module 16, a controllable current source 22, and a voltage measuring device 24.
  • the current source 22 and the voltage measuring device 24 physically connect the inverter control unit 14 to the signal line 20.
  • the current source 22 and / or the voltage measuring device 24 may be missing. All components of the inverter control units 14 are connected to one another by suitable signal lines in accordance with the diagram shown in the figure.
  • the task of the control module 16 is to process the incoming signals and to control the power transistors of the inverters 12 and the current sources 22.
  • the control module 16 communicates with the other inverter units 14 via the line arrangement 30 comprising one or more data or signal lines, as well as with the rectifier unit 15. Furthermore, the line arrangement 30 is used to exchange data with a central control unit (not shown in the figure), for example the main control of a numerically controlled machine, from which the individual inverter control units 14 supply the operating setpoints, such as, for example, the power setpoint and the acceleration setpoint. Deceleration setpoint received.
  • the current source 22 and the voltage measuring device 24 connect the inverter control unit 14 to the signal line 20.
  • the line rectifier control unit 15 is composed essentially of a measuring device 24 for detecting the current flowing in the signal line 20, and a control module 17.
  • the task of the control module 17 is to output the control signals to the power semiconductors of the mains rectifier 11 and to regulate the intermediate circuit voltage. For this purpose, it processes the signals supplied by the measuring device 25 via a corresponding connection.
  • the rectifier control unit 15 is connected to the inverter control units 14 and the main controller via the data line 30.
  • the voltage source 21 is connected to a voltage meter 23 arranged on the intermediate circuit 10 via a suitable line.
  • This connection like the connection between line rectifier control unit 15 and line rectifier 11 and like the connections between inverter control units 16 and inverters 12, has a device (not shown here) for separating the potentials of signal line 20 and intermediate circuit 10.
  • the signal line 20 is expediently related to a ground line, which can also serve as a ground for other signals.
  • the physical implementation of the arrangement shown in the figure is expediently carried out in the form of modules which are accommodated in a common frame, spatially separated from the drives 13.
  • a first module type the components of the rectifier 11, rectifier control unit 15, voltage source 21 and voltage meter 23 which are present only once in each converter arrangement are combined.
  • an inverter 12 and the associated inverter control unit 14 are each arranged.
  • the voltmeter 23 detects the voltage currently present in the intermediate circuit 10 and transmits the measured value potential-free to the voltage source 21. This impresses a direct voltage TJ on the signal line 20, which is a measure of the measured intermediate circuit M
  • the voltage source 21 has a voltage setting or regulating arrangement, not shown here.
  • Such voltage sources are known per se, e.g. from "Semiconductor circuit technology", Tietze, Schenk, 7th edition, section 13.2.
  • the voltages impressed into the signal line 20 expediently move in a low-voltage range of preferably 0 to 10 volts, in such a way that, for example, a voltage of 600 volts measured in the intermediate circuit 10 corresponds to a voltage of 6 volts in the signal line 20.
  • the inverter control units 14 each have a current I corresponding to the current target power of the assigned drive 13 by means of the current sources 22 present therein
  • Usual current sources can be used, examples of which can be found, for example, in "semiconductor circuit technology", Tietze, Schenk, 7th edition, section 4.6.2.
  • Each control unit 14 has an arrangement for measuring the at the
  • control module 16 is supplied. This includes the measured value in the determination of the pulse durations for the power semiconductors in the inverters 12.
  • the operating behavior of the individual drives 13 can be improved in several respects on the basis of the information about the intermediate circuit voltage.
  • the control module 17 can ensure that the voltage impressed on the associated drive 13 corresponds to the required setpoint.
  • the control module 16 extends the pulse duration if, on the basis of the signals measured by the measuring arrangement 24, it determines that the voltage actually present in the intermediate circuit is below the target value specified for the intermediate circuit voltage. Without such a correction, although the pulse duration would be correct in relation to the specified DC link setpoint, the drive voltage would be too low. Knowing the intermediate circuit voltage from the signal line voltage also enables the control module 17 to carry out acceleration processes always adapted to the current energy output / absorption capacity of the intermediate circuit. In the event of a power failure, there is the option of deliberately decelerating a "large" drive, which acts as a Generator is used to maintain the voltage in the DC link until other drives connected to the same DC link are moved to a safety position.
  • the information contained in the overall signal line current is used to regulate the voltage in the intermediate circuit 10.
  • the rectifier control unit 15 has a current measuring device 25, by means of which it detects the current value of the total current I flowing in the signal line 20.
  • the measured value which corresponds to the total power consumed / output, is fed to the control module 17 and is included there in the calculation of the control pulses for the rectifier 11. It is particularly suitable for control based on the principle of pilot control. In this control method, the control unit 15 reacts immediately to any change in the power consumed or output by the drives.
  • the proposed arrangement already allows usable constant control of the intermediate circuit voltage if only those drives 13, by means of current sources 22, impress a current corresponding to the current power into the signal line 20, the power changes per unit time of which are large compared to the other drives. Conversely, those drives whose time-related power changes are comparatively small do not necessarily have to be connected to the signal line. For less stringent requirements on the overall operating behavior of the converter arrangement, it may also suffice to dispense with the transmission of the DC link voltage via the signal line 20 to the drives and only to regulate the DC link voltage based on the current impressed into the signal line 20 by the drives improve. In this case, the signal line is simply impressed with a predetermined DC voltage. Voltage measuring devices 24 and inverter control units 14 are then dispensable.
  • the proposed converter arrangement is based on the principle that all inverters 12 inject the signal line with a current corresponding to the currently consumed / output power, measured by the line rectifier controller 15, and that the line rectifier 11 via the voltmeter 23 and the voltage source 21 the signal circuit 20 impresses a voltage, which in turn the inverter control units 14 measure. While maintaining this principle, configurations of the converter arrangement described are possible. For example, the power transistors in the inverters 12 can be replaced by other components having the same effect, or the structural subdivisions of the functional assemblies can be different.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

Pour réaliser une architecture comportant des convertisseurs statiques de fréquence et ou plusieurs unités de moteur à onduleur raccordés à un circuit intermédiaire commun, il est proposé d'associer à l'unité de commande du redresseur de réseau (11) et aux unités de commande (14) des onduleurs (12) une ligne de signalisation (20) permettant la transmission des signaux qui assurent la régulation de la tension continue du circuit intermédiaire. Cette ligne de signalisation (20) transmet un courant (Ig) correspondant aux puissances individuelles requises ou produites par les moteurs (13). Il est avantageux d'associer une source de tension (21) à la ligne de signalisation (20) à laquelle elle applique une tension (UM) correspondant à la tension momentanée du circuit intermédiaire.
PCT/DE1993/000250 1992-04-03 1993-03-18 Convertisseur statique de frequence avec moniteur de circuit intermediaire WO1993020613A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5516958A JPH06508500A (ja) 1992-04-03 1993-03-18 中間回路モニタを有する電力変換回路

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4211183.8 1992-04-03
DE19924211183 DE4211183A1 (de) 1992-04-03 1992-04-03 Umrichter mit Zwischenkreismonitor

Publications (1)

Publication Number Publication Date
WO1993020613A1 true WO1993020613A1 (fr) 1993-10-14

Family

ID=6455968

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1993/000250 WO1993020613A1 (fr) 1992-04-03 1993-03-18 Convertisseur statique de frequence avec moniteur de circuit intermediaire

Country Status (4)

Country Link
EP (1) EP0587835A1 (fr)
JP (1) JPH06508500A (fr)
DE (1) DE4211183A1 (fr)
WO (1) WO1993020613A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7752878B2 (en) 2006-07-20 2010-07-13 Schuler Pressen Gmbh & Co. Kg Servo-press with energy management
DE102004042403B4 (de) * 2003-09-13 2020-02-06 Schaeffler Technologies AG & Co. KG Verfahren zur Steuerung des in einer Stromstrecke mit einem Elektromotor, einer Steuerschaltung und Anschlusselementen fließenden Stroms

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10052857A1 (de) * 2000-10-24 2002-05-02 Sta Co Mettallerzeugnisse Gmbh Elektromotorisch betätigbare Werkstückspannvorrichtung
DE102005049261B3 (de) 2005-10-14 2007-03-29 Siemens Ag Kühlerlüfter für ein Kraftfahrzeug
CN102602860A (zh) * 2011-12-20 2012-07-25 青岛四方车辆研究所有限公司 架车机升降控制***

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4128803A1 (de) * 1990-09-10 1992-03-12 Barmag Barmer Maschf Frequenzumrichter
DE4105162A1 (de) * 1991-02-20 1992-08-27 Bosch Gmbh Robert Anordnung zur regelung elektronisch kommutierter servomotoren

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4128803A1 (de) * 1990-09-10 1992-03-12 Barmag Barmer Maschf Frequenzumrichter
DE4105162A1 (de) * 1991-02-20 1992-08-27 Bosch Gmbh Robert Anordnung zur regelung elektronisch kommutierter servomotoren

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004042403B4 (de) * 2003-09-13 2020-02-06 Schaeffler Technologies AG & Co. KG Verfahren zur Steuerung des in einer Stromstrecke mit einem Elektromotor, einer Steuerschaltung und Anschlusselementen fließenden Stroms
US7752878B2 (en) 2006-07-20 2010-07-13 Schuler Pressen Gmbh & Co. Kg Servo-press with energy management

Also Published As

Publication number Publication date
DE4211183A1 (de) 1993-10-07
JPH06508500A (ja) 1994-09-22
EP0587835A1 (fr) 1994-03-23

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