US1723732A - Apparatus for the compensation of asynchronous machines by shunt commutator motors connected in cascade - Google Patents

Apparatus for the compensation of asynchronous machines by shunt commutator motors connected in cascade Download PDF

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Publication number
US1723732A
US1723732A US45122A US4512225A US1723732A US 1723732 A US1723732 A US 1723732A US 45122 A US45122 A US 45122A US 4512225 A US4512225 A US 4512225A US 1723732 A US1723732 A US 1723732A
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United States
Prior art keywords
compensation
winding
exciter
brushes
machine
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Expired - Lifetime
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US45122A
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English (en)
Inventor
Hartwagner Ludwig
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.)
FIRM OF SACHSENWERK LICHT und
FIRM OF SACHSENWERK LICHT- und KRAFT-AKTIENGESELLSCHAFT
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FIRM OF SACHSENWERK LICHT und
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/34—Cascade arrangement of an asynchronous motor with another dynamo-electric motor or converter
    • H02K17/38—Cascade arrangement of an asynchronous motor with another dynamo-electric motor or converter with a commutator machine

Definitions

  • the object of the invention described hereinafter is to effect another improvement by arranging the set of exciter-brushes so as to be completely independent of the set of main-brushes, and separately adjustable relatively thereto.
  • Fig. 2 shows the arrangement with a 3- phase six polar compensation and exciter winding with the main and exciter brushes arranged coaxially.
  • Fig. 3 illustrates a modification of the arrangement in Fig. 2.
  • Fig.4 shows the arrangement of the end turns with the winding shown in Fig. 2.
  • Fig. 5 shows the arrangement of the end turns tor the winding according to Fig. 3.
  • Fig. 6 illustrates a modification. of the arrangement shown in Fig. 1.
  • the slip-rings a of an asynchronous motor are connected to the three terminals of the open compensation-winding 6 arranged in the stator of the commutator-machine.
  • the other three terminals of the compensationwinding 2) are connected to the set of main brushes 0.
  • An independently adjustable set of brushes d is arranged on the commutatormachine and connected to the exciter-winding 6 of the stator.
  • a resistance f, or a choke-coil inserted in the excit ercircuit, it is possible to make in a known manner, certain changes or adjustments of the excitation, and thereby of the compen 'sation-characteristic.
  • the commutator-machine can be driven independently or by the asynchronous-machine. In the latter case a mechanical connection is arranged between the two machines, either for direct coupling, or indirect coupling through the medium of any form of gearing.
  • any suitable angle between the compensation-voltage and the exciter-voltage can be adjusted and, therefore, the compensationcharacteristic can be changed in any desired manner within certain limits. Consequently, a precise predetermination is unnecessary and also it may be assured that the desired compensation will be obtained.
  • the compensation can further be altered during working by shifting the brushes and, eventually, by switching a resistance or a choke-coil into the exciter-circuit. By the same measure a simultaneous regulation of the speed of the commutator machine is also made possible.
  • Fig. 2 represents diagrammatically the arrangement of a three-phase six-polar compensationand exciter-winding, with the corresponding mainand exciter-brushes situated on the same shaft of the brushrocker.
  • the end turns of the windings in four planes which means a troublesome complication of the winding-operation, and results in a rather rangement of the end turns for the diagram gig. 2
  • Fig. 5 that for the diagram
  • the voltage at the exciter-brushes depends on the voltage-drop ⁇ in the rotor of the commutatormachine.
  • a second winding connected to a second collector is arranged on the rotor, and preferably inserted in the slots of the main winding. said second winding only supplying the eXciter-load of the commutatormachine.
  • Fig. 6 shows an example of this arrangement. The connection of the main commutator and the compensation-winding remains the same. The exciter-brush set bears against the small auxiliary commutator g, while in the same manner, as shown in Fig. 1, a resistance or a choke-coil may be inserted in the exciter-circuit.
  • the auxiliary exciter-winding can be constructed for producing an optimal voltage differing from, and independent of, that at the maincommutator.
  • This modification is advanwinding can be constructed in a simpler manner by the use of a higher exciter-voltage, and therefore the required regulatingresistance is cheaper, and the influence of the contact resistance is reduced.
  • an asynchronous machine In an apparatus of the type described for the compensation of the phase displacement'of an asynchronous machine, an asynchronous machine, a shunt commutator machine connected in cascade with the asynchronous machine for phase-compensating only, a compensating winding on the stator of the shunt commutator machine, an exciter Winding in the stator of the shunt commutator machine, a set of main brushes in the circuit of the compensating winding, a set of exciter brushes in the circuit of the exciter winding, and means for shifting the sets of said brushes entirely independently of each other. 7
  • a self-excited shunt commutator machine for phase-compensation only, a compensating winding in the stator of the commutator machine an exciter winding in the stator of t e commutator machine, a resistance device, a
  • an asynchronous machine In an apparatus of the type described for the compensation of the phase displacement of an asynchronous machine, an asynchronous machine, a self excited shunt commutator machine for phase-compensation only, a compensating winding in the stator of the commutator machine, an exciter winding in 'the stator of the commutator machine, a resistance device, a set of main brushes in the circuit of the compensating winding, a set of exciter brushes in the circuit of the exciterwinding and the resistance device, means for directly connecting the self excited shunt commutator machine to the asynchronous machine, and devices for shifting the set of exciter brushes entirely independent-1y of the set of main brushes.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc Machiner (AREA)
US45122A 1924-12-30 1925-07-21 Apparatus for the compensation of asynchronous machines by shunt commutator motors connected in cascade Expired - Lifetime US1723732A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES68258D DE499131C (de) 1924-12-30 1924-12-30 Anordnung zur Kompensation von Asynchronmaschinen mittels in Kaskade geschalteten Nebenschlusskollektormotoren

Publications (1)

Publication Number Publication Date
US1723732A true US1723732A (en) 1929-08-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
US45122A Expired - Lifetime US1723732A (en) 1924-12-30 1925-07-21 Apparatus for the compensation of asynchronous machines by shunt commutator motors connected in cascade

Country Status (6)

Country Link
US (1) US1723732A (de)
AT (1) AT103431B (de)
CH (1) CH114766A (de)
DE (1) DE499131C (de)
FR (1) FR598882A (de)
GB (1) GB245410A (de)

Also Published As

Publication number Publication date
FR598882A (fr) 1925-12-28
GB245410A (en) 1926-02-18
AT103431B (de) 1926-05-25
DE499131C (de) 1930-06-02
CH114766A (de) 1926-04-16

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