DE380391C - Machine set consisting of an asynchronous machine and slip ring-fed three-phase current shunt collector machine - Google Patents

Description

In machine set consisting of an asynchronous machine and slip ring-fed three-phase current shunt collector machine. Patent 302255 describes a machine set comprising an asynchronous machine and a three-phase bypass collector machine described in which the energy is supplied to the rotor via slip rings; the The stator windings of the collector machine are attached to the collector's sliding brush sets connected, and the induced windings of the two machines are in series switched. This arrangement allows the speed of the unit in a simple Way to regulate by shifting the collector brushes and without difficulty to go through the synchronous speed, with the unit at any given Setting of the brushes a speed that changes only slightly with the load has, d. H. behaves like a shunt machine.

If you now want to mechanically separate the machine from the asynchronous machine, what may be desirable under certain circumstances - such. B. when the collector machine set up in a special room or with another, suitably larger Speed than the asynchronous machine is to be driven - this is not the case possible without changing the electrical circuit, since it is necessary to achieve a stable Working the tension always the same between the collector brushes Frequency like the part of the asynchronous machine shown in the figure has rnul.l.

According to the Erfiri (luri, 'this is achieved by making the slip rings the collector machine, which is driven by your network, rides synchronously with you the synchronous machine are fed.

An example of implementation of the inventive concept is shown in the drawing illustrated, being iiliersicbtliclikeitshall: he only the leads of a phase are brought to the display. In the drawing, a means the network,! A the asynchronous machine, the collector brushes, f f, of the rear recess d are connected to their slip rings are. The collector machine has a standard winding and its rotor is out with collector also with slip rings g. Mistake. The Asynchronrnascbine owns One pair of slip rings per phase, each with a pair of brush sets on the fiber gate correspond to the rear machine. The collector machine is driven synchronously with network frequency, through coupling with a synchronous chronometer machine connected to the network -i. The rotor of the collector machine is via its slip rings g of a with synchronous excitation machine coupled to the main machine, i.e. with Frequency that corresponds to (leg rotation frequency of the main engine. @Onrit has that Rotating field, i.e. also the voltage on the collector brushes of the rear machine The frequency coincides with the hatching of the main engine. The regulation takes place through the displacement of the collector brushes, where tensions are more variable Size and phase are taken from ki # nrien. But you can also use this 1ZZe "eltni" an additional regulation by setting @ Iltui- the voltage of the machine! r kon rbiniereri.

Since you have the Pliase and the l @ r- @ l @ e of the tension on the IZegelliür> teri J '/', can change independently of each other. so one is thus able at will @lie speed to control and thereby in all o; l @ r only in certain speed ranges (put Hattltrnaschine; lie phase to compensate o put also under the unistestand the Rear ta @ chine can only be used as a phase shifter when starting the Rule set r, c! one can use r ;; iecoilektorrnascliinezr as the starter motor, if nian z. B. bridged their stator winding by @@, 'iderstä rirle r and they at open switches! and ir as an induction motor with powered by the machine li Runner and with (expediently controllable) resistors f closed Brings the secondary part up to speed. After the required speed has been reached the and closed and the resistors r- switched off or even further in matching Egg position 1 used.

With the arrangement described above, one can determine the number of grinding channels the asynchronous machine can be reduced to three if you let the circuit of its stand and runner swapped, d. H. her runner to the net and her stand to the Collector machine then

PATENT CLAIMS:

Claims (3)

302285? M d 2 claim 1. Synchronmit A d A dadi by I claim 4 3 arrangement d ß connected dd (l) d setting r. Machine set consisting of an asvachron machine and slip-ring-fed three-phase auxiliary circuit collector machine according to the patent, in which the induced times of the two mechanically separated machines are in series, characterized in that the slip rings of the collector machine driven by the mains are fed with the rotational frequency of the asynchronous machine 1 machine set according to r, characterized in that the rotor of the collector machine is mechanically coupled to one connected to the network and its slip rings are fed by a synchronous machine mechanically coupled to the rotor of the asynchronous machine. 3. Regulatory procedure of the Arrangement according to nspruch i, characterized in that the collector machine depending on the setting of your stator ampere turns as a working machine or as a pure phase shifter serves. arrangement scar claim z, .1. marked, released collector rear machine serves as an induction motor to start the Hiriterniaachin nregelsatzes. . after Since the collector is identified by a machine when starting as one of the synchronous excitation machine rotor-fed and secondary to resistors induction motor is working. Arrangement according to claim .I, characterized by the ate the stator winding the Iiollelctormaschine ü 'scalding AnIa13w-i first after the start = to serve the stan <1eramperetvindungen.