WO1992005626A1 - Appareil de commande de machines a courant continu en serie - Google Patents

Appareil de commande de machines a courant continu en serie Download PDF

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Publication number
WO1992005626A1
WO1992005626A1 PCT/SE1991/000627 SE9100627W WO9205626A1 WO 1992005626 A1 WO1992005626 A1 WO 1992005626A1 SE 9100627 W SE9100627 W SE 9100627W WO 9205626 A1 WO9205626 A1 WO 9205626A1
Authority
WO
WIPO (PCT)
Prior art keywords
armature
machine
current
field
switching
Prior art date
Application number
PCT/SE1991/000627
Other languages
English (en)
Inventor
Bo Vikarby
Original Assignee
Gme System Ab
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 Gme System Ab filed Critical Gme System Ab
Publication of WO1992005626A1 publication Critical patent/WO1992005626A1/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
    • H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
    • H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
    • H02P3/08—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor
    • H02P3/14—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor by regenerative braking

Definitions

  • the present invention relates to an apparatus for con ⁇ trolling series wound DC machines with the possibility of maintaining different currents in field and armature wind- ings, more specifically to such a machine having an ele ⁇ ment with a diode function connected in parallel with the field winding and a first switching element connected be ⁇ tween the field winding and one pole of the supplying DC source.
  • Different forms of rotation speed control and the re ⁇ gulation of DC machines using a chopper are already known, see e.g. EP 0 054 614 and GB 1 422 965.
  • the basic concept is that by controlling the pulse ratio of the chopper the mean value of the output voltage can be controlled, thus regulating the D.C. machine.
  • a DC machine With a single quadrant chopper, for example, a DC machine may be driven forward but not braked. With a double quadrant chopper, a DC machine may also be electrically bra ed by feeding the mechanical kinetic energy stored in motor and load back to a driving energy source i.e. the motor goe over to operation as a generator. Such regenerative braking of separately magnetised DC motors is previously known and often used in different applications, e.g. SE 385 360, US 3 984 743 and DE 3 717 279.
  • the object of the present invention is to provide a new apparatus for controlling series wound DC machines for doubl quadrant motor/generator operation with feed back of energy for braking without mechanical switching of the armature or series field winding, which apparatus is much simpler than constructions already known and requires a minimum of com ⁇ ponents.
  • a still further advantage with the apparatus according to the invention is that a current can be maintained through the field winding without any mea current passing through the armature, this operational case being utilisable for preventing the motor running away. In this way e.g. impermissible high speeds in vehicle operatio can be avoided, without an extra shunt winding needing to be arranged.
  • the switching element shall con duct/block current in the positive direction, and at least conduct current in the negative direction.
  • the switching elements are fiel effect transistors (FET's). However, a plurality of other kinds of components may be used as switching elements.
  • Fig 1 illustrates the diffent operatio ⁇ nal types in the current-EMF plane for a series wound DC machine.
  • Fig 2 illustrates the positive reference direct ⁇ ions for current and EMF in the PC machine, and
  • Figs 3-8 illustrate an embodiment of the apparatus according to the invention in different operational modes.
  • a series wound DC machine including armature 8 and series field windings 6, is connected to a supplying DC source U, e.g. a battery U.
  • the armature is electrically represented by a series connection of a resistor R a an inductance L a and an EMF E, counterdirected in relation to the battery voltage U.
  • a switching element in the form of a FET 2.
  • the FET 2 is connected in series with a second switching element 4, also in the form of a FET and connected in parallel with the armature.
  • the FET's 2,4 are connected via their controls 12 and 14 to a suitable control unit, which is not more closely described.
  • a pole reversing contactor is schematically shown at 16,18 and 20, and is arranged in the armature circuit to enable reversing of the revolutional direction of the machine, and thus so-called quadruple quadrant operation.
  • This pole reversing contactor may alternatively be arranged in the field circuit.
  • Fig 3 there is illustrated a first motor operation case representing switching on the machine.
  • the FET 2 is ON for closing the current circuit, as shown in the Fig.
  • the current i increases as long as the battery voltage U exceeds the EMF E plus the resistive voltage drop across armature and field.
  • Fig 4 there is illustrated a second motor operation case with freewheeling armature and field currents i a and i f respectively.
  • the transistor 2 is OFF, the inductances of armature 8 and field winding 6 continuing to drive the freewheeling currents i a and i f respectively, as shown in the Fig.
  • Fig 5 there is illustrated a special motor operation case, enabling the increase of the field current i f in re- lation to the armature current i a .
  • both trans ⁇ istors are ON, and the entire battery voltage is across the field winding 6, resulting in an increase of the field cur ⁇ rent i f .
  • the current through the transistor is denoted by ⁇ i , there is thus obtained i f - i a + ⁇ i f
  • Fig 6 there is illustrated the introductory phase in a case of generator operation.
  • both the transistors 2, 4 are ON, as in the case illustrated in Fig 5, and the entire battery voltage U will be situated across the field winding 6, thus maintaining magnetisation of the machine.
  • the EMF E in the armature 8 simultaneously drives a current i a through it in the opposite direction to the one in the case of operation as a motor.
  • This operation mode con tinues until the field current i f has increased to a pre- determined magnitude and then the transistor 2 is switched to OFF, according to the operation case shown in Fig 7.
  • Fig 7 the case is thus that the transistor 2 is OFF, while the transistor 4 is ON.
  • the armature current i a which is driven by the EMF E of the machine, increases, while the field current i f freewheels, as illutrated in the figure.
  • This operation case continues until a suitably large arma ⁇ ture current i a is attained, i.e. suitable braking effect is obtained.
  • the transistor 4 has just switched to OFF, the inductance L a in the armature 8 then continuing to drive the current i a , whic is fed back to the driving battery U.
  • the field current i f freewheels, as shown.
  • the series machine thus operates as a generator and feeds back energy to the battery U.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Direct Current Motors (AREA)
  • Control Of Multiple Motors (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

L'appareil décrit, qui sert à commander des machines à courant continu en série, comprend un élément (10) ayant une fonction de diode, qui est connecté en parallèle avec l'enroulement inducteur (6), un premier élément de commutation (2) connecté entre l'enroulement inducteur et l'un des pôles de la source de courant continu alimentatrice (U), ainsi qu'un second élément de commutation (4) connecté en parallèle avec l'induit (8), les deux éléments de commutation étant connectés entre eux via l'élément ayant une fonction de diode.
PCT/SE1991/000627 1990-09-18 1991-09-18 Appareil de commande de machines a courant continu en serie WO1992005626A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9002970-3 1990-09-18
SE9002970A SE9002970D0 (sv) 1990-09-18 1990-09-18 Tvaa- eller fyrkvadrantsdrift av batteridrivna serielindade likstroemsmotorer

Publications (1)

Publication Number Publication Date
WO1992005626A1 true WO1992005626A1 (fr) 1992-04-02

Family

ID=20380391

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1991/000627 WO1992005626A1 (fr) 1990-09-18 1991-09-18 Appareil de commande de machines a courant continu en serie

Country Status (2)

Country Link
SE (2) SE9002970D0 (fr)
WO (1) WO1992005626A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6938798B2 (en) 2000-12-08 2005-09-06 Tebro S.A. Fluid or powdery product dispensing device
US7075257B2 (en) 2002-10-18 2006-07-11 Black & Decker Inc. Method and device for braking a motor
ITTO20090761A1 (it) * 2009-10-06 2011-04-07 Bottero Spa Macchina per la lavorazione/movimentazione lastre di vetro
US10720860B2 (en) 2018-01-03 2020-07-21 Milwaukee Electric Tool Corporation Electronic braking in a power tool

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0054614A1 (fr) * 1980-12-24 1982-06-30 Robert Bosch Gmbh Arrangement d'un circuit pour la récupération de l'énergie de moteurs à excitation en série commandés par un hacheur

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0054614A1 (fr) * 1980-12-24 1982-06-30 Robert Bosch Gmbh Arrangement d'un circuit pour la récupération de l'énergie de moteurs à excitation en série commandés par un hacheur

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6938798B2 (en) 2000-12-08 2005-09-06 Tebro S.A. Fluid or powdery product dispensing device
US7075257B2 (en) 2002-10-18 2006-07-11 Black & Decker Inc. Method and device for braking a motor
ITTO20090761A1 (it) * 2009-10-06 2011-04-07 Bottero Spa Macchina per la lavorazione/movimentazione lastre di vetro
EP2308783A1 (fr) * 2009-10-06 2011-04-13 Bottero S.p.A. Appareil de manutention de feuilles de verre
US10720860B2 (en) 2018-01-03 2020-07-21 Milwaukee Electric Tool Corporation Electronic braking in a power tool
US11075594B2 (en) 2018-01-03 2021-07-27 Milwaukee Electric Tool Corporation Electronic braking in a power tool
US11695352B2 (en) 2018-01-03 2023-07-04 Milwaukee Electric Tool Corporation Electronic braking in a power tool

Also Published As

Publication number Publication date
SE9100270L (sv) 1992-03-19
SE9100270D0 (sv) 1991-01-29
SE9002970D0 (sv) 1990-09-18

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