EP0212462A2 - Circuit d'amplificateur pour électro-aimants de valves proportionnelles ou de servo-valves - Google Patents

Circuit d'amplificateur pour électro-aimants de valves proportionnelles ou de servo-valves Download PDF

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Publication number
EP0212462A2
EP0212462A2 EP86110910A EP86110910A EP0212462A2 EP 0212462 A2 EP0212462 A2 EP 0212462A2 EP 86110910 A EP86110910 A EP 86110910A EP 86110910 A EP86110910 A EP 86110910A EP 0212462 A2 EP0212462 A2 EP 0212462A2
Authority
EP
European Patent Office
Prior art keywords
amplifier circuit
control
current
proportional
electromagnets
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.)
Withdrawn
Application number
EP86110910A
Other languages
German (de)
English (en)
Other versions
EP0212462A3 (fr
Inventor
Joachim Morsch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSO Steuerungstechnik GmbH
Original Assignee
BSO Steuerungstechnik 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 BSO Steuerungstechnik GmbH filed Critical BSO Steuerungstechnik GmbH
Publication of EP0212462A2 publication Critical patent/EP0212462A2/fr
Publication of EP0212462A3 publication Critical patent/EP0212462A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
    • H01F7/1872—Bistable or bidirectional current devices

Definitions

  • the invention relates to an amplifier circuit for electromagnets of proportional or servo valves with a transistor output stage controlled by a pulse width modulator of a control stage.
  • the known amplifier circuits of this type which operate at a clock frequency of the pulse width modulator below approximately 500 Hz, have an improved efficiency and a simpler structure than the circuits based on the series regulator technology, but on the other hand have poorer dynamics.
  • the invention has for its object to improve an amplifier circuit of the type mentioned in such a way that even better efficiencies and high dynamics can be achieved. This problem is solved by a circuit having the features of claim 1.
  • the design of the output stage according to the invention results in a significantly higher degree of efficiency and therefore makes it possible to allow significantly higher currents.
  • this enables the use of magnets with a reduced resistance, in particular a smaller inductance, and the choice of a more favorable ratio of the maximum current to the nominal current, as a result of which a significantly shorter current build-up time and thus a faster control is achieved.
  • the output stage according to the invention enables not only to short-circuit the excitation coil when the magnet is switched off, but to apply a counter voltage, which means that a much shorter current reduction time and thus quick extinction can be achieved. Both the shorter power build-up time and the shorter power take-off time enable an increase in dynamics.
  • Another advantage of the circuit according to the invention is that it enables bipolar control of control magnets, as is required for servo valves.
  • the higher efficiency which also contributes to the fact that the bridge is switched without cross-current, also has the advantage that no specially designed power supplies are required.
  • the clock frequency ues pulse width modulator is in the range from 10 kHz to approximately 200 kHz.
  • This significantly higher clock frequency compared to the known circuits allows a greatly increased dynamic range compared to the known solutions.
  • this high clock frequency makes it possible to position magnets with corner frequencies in the range of 100 Hz without disturbing beats. It is also possible to superimpose the hum optimized for the control element on the output current in a simple manner, as a result of which very low-hysteresis positioning can be achieved.
  • the invention is explained in detail below using an exemplary embodiment shown in the drawing.
  • the single figure shows a pressure circuit diagram of the exemplary embodiment.
  • a controller 1 which is an I controller in the exemplary embodiment, the input of a pulse width modulator 2 is connected, to which a fixed clock frequency generated by a clock generator 3 is fed, which lies in the range between 10 kHz and approx. 200 kHz .
  • the pulse signal output Ten modulator 2 which consists of a series of rectangular pulses, therefore has a corresponding, fixed frequency. However, the pulse width of these pulses is variable and is determined by the output signal from controller 1.
  • the output stage to be controlled by means of the width or duration of the modulated pulses has four identical power N-channel field effect transistors 4, each of which lies in one of the four bridge branches.
  • the operating voltage U L is present at one diagonal of this bridge, while the other diagonal has the two connections for the load, which is the excitation winding 5 of the electromagnet.
  • this electromagnet is part of a high-current servo valve.
  • the gate of each of the four transistors 4 is driven by a driver circuit 6.
  • Those two driver circuits 6, which control the two transistors 4 directly connected to the positive, pole of the supply voltage are switched by a special circuit, namely a capacitor increase, with a higher control voltage by the supply voltage applied to an input 7 with the Operating voltage supplied. This ensures that all four transistors 4 can be switched through to the smallest saturation voltages.
  • control logic 8 For a diagonal control of the bridge formed by the transistors 4, control logic 8 is provided, one output of which is connected to one diagonal driver pair and the other output of which is connected to the other diagonal driver pair.
  • the control logic 8 delays the high edges of the drive pulses for the driver circuits 6 so that when U: switch from one driver pair to the other driver pair no current flows in one of the two bridge branches which are connected in parallel to the operating voltage U L.
  • a resistor 9 is provided in each of the two bridge branches that are directly connected to the zero potential of the operating voltage, the resistance value of which can be chosen to be very low, since it can only tap one of the Serve current proportional measurement voltage.
  • the voltages tapped at the two resistors 9 are present at the two inputs of a wet amplifier 10, the output signal of which is the actual current value represents.
  • the setpoint value of the current is present in the form of a DC voltage at an input amplifier 11, the output signal of which is adapted so that it can be fed to a summing point 12, to which the signal representing the actual value is also supplied for the actual value / setpoint value.
  • the difference between the actual value and the actual value formed at summation point 12 is present at the input of controller 1.
  • the optimum dither portion for the respective valve is likewise supplied to the summing point 12 by a corresponding signal transmitter 13 and is therefore superimposed on the output current.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Magnetically Actuated Valves (AREA)
  • Feedback Control In General (AREA)
  • Servomotors (AREA)
EP86110910A 1985-08-30 1986-08-07 Circuit d'amplificateur pour électro-aimants de valves proportionnelles ou de servo-valves Withdrawn EP0212462A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3530966 1985-08-30
DE19853530966 DE3530966A1 (de) 1985-08-30 1985-08-30 Verstaerkerschaltung fuer elektromagnete von proportional- oder servoventilen

Publications (2)

Publication Number Publication Date
EP0212462A2 true EP0212462A2 (fr) 1987-03-04
EP0212462A3 EP0212462A3 (fr) 1988-01-13

Family

ID=6279717

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86110910A Withdrawn EP0212462A3 (fr) 1985-08-30 1986-08-07 Circuit d'amplificateur pour électro-aimants de valves proportionnelles ou de servo-valves

Country Status (3)

Country Link
EP (1) EP0212462A3 (fr)
JP (1) JPS6277602A (fr)
DE (1) DE3530966A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0306437A2 (fr) * 1987-08-12 1989-03-08 MANNESMANN Aktiengesellschaft Circuit hacheur pour l'alimentation de bobines d'électro-aimant et/ou de moteurs pas à pas, en particulier pour une imprimante
EP0404223A2 (fr) * 1989-06-23 1990-12-27 British Aerospace Public Limited Company Système de contrôle des actionneurs
DE4201652A1 (de) * 1992-01-22 1993-07-29 Rexroth Mannesmann Gmbh Ansteuerung eines proportionalventils mit netzspannung
EP1803944A1 (fr) * 2005-12-30 2007-07-04 Integrated Dynamics Engineering GmbH Alimentation en fluide pour un système d'isolation de vibrations

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3621404A1 (de) * 1986-06-26 1988-01-14 Bosch Gmbh Robert Elektronische schalteinrichtung fuer einen magneten oder dergleichen
DE3904441A1 (de) * 1987-08-12 1990-08-23 Mannesmann Ag Chopperschaltung fuer die ansteuerung von elektromagnet- und/oder schrittmotoren-spulen, insbesondere fuer einen matrixdrucker
DE3729183C2 (de) * 1987-09-01 1994-11-10 Rexroth Mannesmann Gmbh Schaltung zum Betrieb eines magnetisch betätigten Ventils
DE3827882A1 (de) * 1988-08-17 1990-02-22 Teldix Gmbh Anordnung zum stellrichtungs- und stellwegabhaengigen ansteuern eines stellgliedes
US4964014A (en) * 1989-01-06 1990-10-16 Deere & Company Solenoid valve driver
DE4107496A1 (de) * 1991-03-08 1992-09-10 Eckehart Schulze Verfahren zur ansteuerung eines als magnetventil ausgebildeten schieberventils sowie fuer eine anwendung des verfahrens geeignetes magnetventil
FR3119266B1 (fr) * 2021-01-27 2023-01-27 Schneider Electric Ind Sas Actionneur électromagnétique et procédé de commande d’un actionneur électromagnétique

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3112280A1 (de) * 1981-03-27 1982-10-07 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zur spulenerregung fuer die erzeugung pulsfoermiger felder konstanter staerke
EP0099941A1 (fr) * 1982-07-29 1984-02-08 Vickers Systems GmbH Circuit pour commander l'aimant électrique d'une soupape à voie
DE3415649A1 (de) * 1984-04-27 1985-11-07 Dr. H. Tiefenbach Gmbh & Co, 4300 Essen Schaltungsanordnung zur betaetigung eines elektromagnetischen ventils
DE3440885A1 (de) * 1984-11-09 1986-05-15 Robert Bosch Gmbh, 7000 Stuttgart Schaltungsanordnung zum einschalten von magnetventilen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2042721B2 (de) * 1970-08-28 1977-03-17 Honeywell Gmbh, 6000 Frankfurt Schaltungsanordnung zur beschleunigten richtungsumkehr des stromes in einer induktivitaet
DE3344662A1 (de) * 1983-12-09 1985-06-13 Mannesmann Rexroth GmbH, 8770 Lohr Schaltungsanordnung zur ansteuerung eines magnetventils, insbesondere fuer kraftstoffeinspritzventile

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3112280A1 (de) * 1981-03-27 1982-10-07 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zur spulenerregung fuer die erzeugung pulsfoermiger felder konstanter staerke
EP0099941A1 (fr) * 1982-07-29 1984-02-08 Vickers Systems GmbH Circuit pour commander l'aimant électrique d'une soupape à voie
DE3415649A1 (de) * 1984-04-27 1985-11-07 Dr. H. Tiefenbach Gmbh & Co, 4300 Essen Schaltungsanordnung zur betaetigung eines elektromagnetischen ventils
DE3440885A1 (de) * 1984-11-09 1986-05-15 Robert Bosch Gmbh, 7000 Stuttgart Schaltungsanordnung zum einschalten von magnetventilen

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0306437A2 (fr) * 1987-08-12 1989-03-08 MANNESMANN Aktiengesellschaft Circuit hacheur pour l'alimentation de bobines d'électro-aimant et/ou de moteurs pas à pas, en particulier pour une imprimante
EP0306437A3 (fr) * 1987-08-12 1990-10-17 MANNESMANN Aktiengesellschaft Circuit hacheur pour l'alimentation de bobines d'électro-aimant et/ou de moteurs pas à pas, en particulier pour une imprimante
EP0404223A2 (fr) * 1989-06-23 1990-12-27 British Aerospace Public Limited Company Système de contrôle des actionneurs
EP0404223A3 (fr) * 1989-06-23 1992-05-06 British Aerospace Public Limited Company Système de contrôle des actionneurs
DE4201652A1 (de) * 1992-01-22 1993-07-29 Rexroth Mannesmann Gmbh Ansteuerung eines proportionalventils mit netzspannung
US5724223A (en) * 1992-01-22 1998-03-03 Mannesmann Rexroth Gmbh Control of a proportional valve using mains voltage
EP1803944A1 (fr) * 2005-12-30 2007-07-04 Integrated Dynamics Engineering GmbH Alimentation en fluide pour un système d'isolation de vibrations

Also Published As

Publication number Publication date
JPS6277602A (ja) 1987-04-09
DE3530966A1 (de) 1987-03-05
EP0212462A3 (fr) 1988-01-13
DE3530966C2 (fr) 1989-03-23

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