DE642253C - Device for practicing the method for operating electrical alternating current synchronous machines with variable speed - Google Patents

Description

GERMAN EMPIRE

ISSUED ON
FEBRUARY 27, 193?

. REICH PATENT OFFICE

PATENT LETTERING

JVl 642253 CLASS 21 d 2 GROUP

© r> 3ng. Jakob LeIl in Heidenheim, Brenz

Addendum to patent 614

The invention relates to devices for practicing the method of operating electrical alternating current synchronous machines with variable speed according to patent 614335, in which a rotating magnetic field in the circumferential direction is relative to the rotor this moves in synchronism with the stator rotating field. With this one becomes the circumferential Magnetic field into a series of individual fields that are adjacent to one another in the direction of the circumference disassembled, each of which is connected to a collector with a rotating brush bridge connected coil is excited, which the excitation direct current with the help of Slip rings are fed via the rotating brush bridge, the rotation of which is controlled by the Rotation of the rotor derived with the interposition of a variable transmission gear is. This arrangement causes the DC excited poles to rotate at a speed that always corresponds to the synchronism of the Alternating current rotating field corresponds, depending on the desired translation with respect to the rotor but can be smaller, equal to or larger than the rotor speed.

In the present invention, the rotating magnetic field is intended to be used as a direct current armature Executed rotor can be produced with one or more lamellas per slot, the armature winding as a chord winding be formed and can be arranged in open or closed grooves.

In order to eliminate the consequences of the remanence, the armature winding is broken up into individual coils, the beginnings and ends of which are guided by the particular collectors; the brushes then have to cover as many slats as that pronounced poles arise. Those collector lamellas whose coils are in the The neutral zone between the pronounced poles is made possible by special brushes an auxiliary current is supplied which counteracts the remanence. Advantageously, at this type of excitation power supply, the brushes are staggered, and in the power supply The start and end brushes can have resistors connected to a voltage curve similar to that of flattened pole pieces to achieve.

Claims (4)

50 claims: i. Device for carrying out the method for operating electrical alternating current synchronous machines with variable speed according to patent 614335, characterized in that the rotating Field through a rotor designed as a direct current armature with one or more Lamellas are generated per groove, ($ 42253 2. Apparatus according to claim i, characterized in that the armature has a winding obtained from individual coils, their beginnings and ends depending on the particular collectors 'are performed. 3. Apparatus according to claim 2, characterized in that "' characterized that the brushes of the brush bridge as many coil starts and send cover the fact that pronounced poles are created when the current passes through. 4. Device according to claims 1 to 3, characterized in that the beginnings and ends of the coils of the neutral zone between the poles covered by brushes that are a stream, opposite to that \\ energizing current to feed these coils, - ■ that the remanence of the iron on them '; | 3telle, wholly, / or partially canceled. ~ "fev ^ ^orr ^ ^do S according to claims 1 to 4 /." DädurclFgekmarks that the brushes, which cover the coil beginnings and ends of the salient poles and the coils of the neutral zone, are staggered and that in the power supply lines of the initial and end brushes of the brush sets resistors are connected.