DE2121663A1 - Circuit arrangement for continuously controllable field weakening of several DC motors - Google Patents
Circuit arrangement for continuously controllable field weakening of several DC motorsInfo
- Publication number
- DE2121663A1 DE2121663A1 DE19712121663 DE2121663A DE2121663A1 DE 2121663 A1 DE2121663 A1 DE 2121663A1 DE 19712121663 DE19712121663 DE 19712121663 DE 2121663 A DE2121663 A DE 2121663A DE 2121663 A1 DE2121663 A1 DE 2121663A1
- Authority
- DE
- Germany
- Prior art keywords
- motors
- circuit arrangement
- parallel
- several
- electronic
- 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.)
- Pending
Links
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
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
- H02P7/282—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling field supply only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Multiple Motors (AREA)
Description
Schaltungsanordnung zur stetig regelbaren Feldschwächung von mehreren Gleichstrommotoren Die Erfindung betrifft eine Schaltungsanordnung zur stetig regelbaren Feldschwächung von mehreren Gleichstrommotoren, vorzugsweise Gleichstrom-Reihenschlußmotoren, mit durch einen elektronischen Gleichstromsteller periodisch kurzgeschlossenen, parallel zur Erregerwicklung angeordneten Widerstand.Circuit arrangement for continuously controllable field weakening of several DC motors The invention relates to a circuit arrangement for continuously controllable Field weakening of several DC motors, preferably DC series motors, with periodically short-circuited by an electronic DC chopper, resistor arranged parallel to the excitation winding.
Bekannt ist eine Schaltungsanordnung zur Feldschwächung eines Gleicnstrommotors, bei der ein parallel zur Erregerwicklung geschalteter Widerstand durch einen elektronischen Gleichstromsteller periodisch kurzgeschlossen wird. Die Feldschwächung läßt sich durch Änderung der relativen Einschaltdauer des elektronischen Gleichstromstellers stetig regeln, Eine derartige Schaltungsanordnung hat den Nachteil, daß nicht mehrere parallel geschaltete Gleichstrommotoren durch einen elektronischen Gleichstromsteller gemeinsam geregelt werden können. Ein Parallelschalten mehrerer Erregerwicklungen hätte bei geringen Ankerspannungsdifferenzen große Ausgleichströme in den Ankern zur Folge.A circuit arrangement for weakening the field of a DC motor is known, in which a resistor connected in parallel to the excitation winding is replaced by an electronic one DC chopper is periodically short-circuited. The field weakening can by changing the relative duty cycle of the electronic DC power controller regulate continuously, Such a circuit arrangement has the disadvantage that not several DC motors connected in parallel by an electronic DC power controller can be regulated together. A parallel connection of several excitation windings would have large equalizing currents in the armatures with small armature voltage differences result.
Bei einer weiterhin bekannten Schaltungsanordnung wird dieser Nachteil durch Reihenschaltung mehrerer Gleichstrommotoren vermieden in der Form, daß die in Reihe geschalteten Erregerwicklungen mit einem periodisch kurzgeschlossenen Parallelwiderstand beschaltet sind0 Nachteilig ist jedoch hierbei, daß durch die Reihenschaltung die Gleichstrommotoren für das Vielfache ihrer Betriebsspannung isoliert sein müssen.In the case of a circuit arrangement that is still known, this disadvantage becomes apparent Avoided by series connection of several DC motors in the form that the Excitation windings connected in series with a periodically short-circuited parallel resistor are wired0 The disadvantage here, however, is that due to the series connection the DC motors must be isolated for many times their operating voltage.
Zweck der Erfindung ist es, die dem Stand der Technik anhaftenden Mängel zu beseitigen und den technischen Aufwand zu verringern. The purpose of the invention is to relate to the prior art Eliminate defects and reduce the technical effort.
Der Erfindung liegt die Aufgabe zugrunde, eine Möglichkeit zur gemeinsamen regelbaren Feldschwächung mehrerer in einem Punkt zusammengeschalteter, vorzugsweise parallel geschalteter Gleichstrommotoren durch öin gemeinsames Stellglied zu schaffen.The invention is based on the object of a possibility for common controllable field weakening of several interconnected in one point, preferably DC motors connected in parallel by means of a common actuator.
ErfindungßgemaB wird diese Aufgabe dadurch gelöst, daß jede Erregerwicklung mit Parallelwiderstand über je ein Entkopplungsventil dem gemeinsamen elektronischen Gleichstromstel-1er prall geschaltet ist. Die Entkopplungsventile sind für den Strom über den elektronischen Gleichstromsteller in DurchlaBrichtung geschaltet.According to the invention this object is achieved in that each field winding with parallel resistance via a decoupling valve each to the common electronic DC power controller is switched on at full speed. The decoupling valves are for the electricity switched via the electronic DC chopper in the forward direction.
Eine derartig ausgebildete Schaltungsanordnung ermöglicht die gemeinsame stetige Feldregelung von mehreren Gleichstrommotoren mit einem gemeinsamen Anschlußpunkt ohne daß sich diese gegenseitig beeinflussen.A circuit arrangement designed in this way enables the common Continuous field control of several DC motors with a common connection point without these influencing each other.
Die Erfindung soll nachstehend an einem Ausführungsbeispiel näher erläutert werden.The invention is to be described in more detail below using an exemplary embodiment explained.
Die Zeichnung zeigt eine Schaltungsanordnung zur gemeinsamen stetig regelbaren Feldschwächung von mehreren Gleichstrom-ReihenschluBmotoren durch einen gemeinsamen elektronischen Gleichstroms teller.The drawing shows a circuit arrangement for common steadily controllable field weakening of several direct current series motors by one common electronic DC power switch.
Die Erregerwicklungen 2; 2' mit ihren Parallelwiderständen 3; 3' sind über Entkopplungsventile 5; 5' an den elektronischen Gleichstromsteller 4 geschaltet. Während der elektronische Gleichstromsteller 4 in geöffnetem Zustand ist, fließt die Differenz der durch Anker 1 bzw. 1' und Erregerwicklung 2 bzw. 2' fließenden Ströme über den Parallelwiderstand 3 bzw. 3'. Die beiden Entkopplungsventile 5; 5' verhindern bei Potentialdifferenzen zwischen den KLemmpunkten 6; 6' einen Ausgleichstrom, da für diesen Strom ein Entkopplungsventil 5 bzwo 5' in Sperrichtung geschaltet ist. Befindet sich der elektronische Gleichstromsteller 4 in geschlossenem Zustand, so werden alle Erregerwicklungen 2; 2' kurzgeschlossen und der zuvor über die Parallelwiderstände 3; 3' geflossene Strom fließt über die jetzt in Durchlaßrichtung gepolten Entkopplungsventile 5; 5' und den elektronischen Gleichstromsteller 4 weiter bis der elektronische Gleichstromsteller 4 wieder öffnet und der Vorgang sich wiederholt.The excitation windings 2; 2 'with their parallel resistors 3; 3 'are via decoupling valves 5; 5 'connected to the electronic DC power controller 4. While the electronic DC chopper 4 is in the open state, flows the difference between the armature 1 or 1 'and the excitation winding 2 or 2' flowing through Currents through the parallel resistor 3 or 3 '. The two decoupling valves 5; 5 'prevent potential differences between the clamping points 6; 6 'an equalizing current, because a decoupling valve 5 or 5 'switched in the blocking direction for this current is. If the electronic DC power controller 4 is in the closed state, so all excitation windings 2; 2 'short-circuited and the one previously via the parallel resistors 3; The current that has flowed 3 'flows through the decoupling valves, which are now polarized in the forward direction 5; 5 'and the electronic DC chopper 4 to the electronic DC chopper 4 opens again and the process is repeated.
Claims (2)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD14772070 | 1970-05-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2121663A1 true DE2121663A1 (en) | 1971-12-09 |
Family
ID=5482537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19712121663 Pending DE2121663A1 (en) | 1970-05-25 | 1971-05-03 | Circuit arrangement for continuously controllable field weakening of several DC motors |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2121663A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2556523A1 (en) * | 1983-12-12 | 1985-06-14 | Cem Comp Electro Mec | Control circuits for a DC motor provided with an independent exciter winding |
-
1971
- 1971-05-03 DE DE19712121663 patent/DE2121663A1/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2556523A1 (en) * | 1983-12-12 | 1985-06-14 | Cem Comp Electro Mec | Control circuits for a DC motor provided with an independent exciter winding |
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