DE1080198B - Encoder unit for electric remote drive that is fed with direct current - Google Patents

Description

GERMAN

The invention relates to a transmitter unit for an electric remote drive that operates with direct current is fed and for the generation of three-phase current for the synchronous operation of receiver motors serves. Such a transmitter unit is already known in which the "brushes for the supply of the Direct current as well as the brushes for the extraction of the generated rotary current axially sparing, allel with the drive shaft ' on one end face of the encoder rotor. '· and the one for generating the three-phase current in the DC circuit switched partial resistors in the form of free-standing coils on the other ;; Front side of the encoder rotor are arranged.

Such known transmitter units have proven themselves well in operation in many cases. At higher Ambient temperatures, such as B. in the tropics, however, the wires of the individual partial resistances heated too much. The heating by the solar radiation and by the heat of the wind can disadvantageous, especially at a standstill, when the collector stops in an unfavorable position and lead to the burning of individual partial resistances. They are also free with this type of construction standing, open resistance coils are easily injured.

It is also known to individually wrap resistors on coils or strips in an insulating body embedded in order to provide good protection against contact and moisture as well as high dielectric strength to achieve.

In the case of the transmitter unit according to the present invention, all of them are used to generate the three-phase current Partial resistors connected to the direct current circuit are wound onto one another in a common bobbin and cast in a jacket provided with cooling fins. The unit coil produced in this way is arranged on one end of the encoder rotor.

With this arrangement, between the individual resistors rapid temperature equalization takes place, so that partial resistances are burned be avoided. In addition, due to the compact arrangement, the partial resistances are before mechanical Injuries protected.

In the drawing, which illustrates an embodiment of the subject matter of the invention, is Fig. 1 is an axial section through the encoder unit,

Fig. 2 is a section along the line II-II through the Geb eraggr egat,

Fig. 3 is a section along the line III-III through the Drive shaft,

4 shows a view from the right in FIG. 1 of the encoder rotor with the cooling jacket removed.

On the drive shaft 1 is the encoder rotor 2 with the encoder unit

for electric remote operator,

which is fed with direct current

Applicant:

Hasler A. G. Works for Telephony

and precision mechanics,

Bern

Representative:

Dr.-Ing. A. Weickmann and Dipl.-Ing. F. Weickmann,
Patent Attorneys, Munich 2, Brunnstr. 8/9

Claimed priority:
Switzerland from May 31, 1957

Ernst Zbinden and Alexander Lüscher,

Liebefeld, Bern (Switzerland),
have been named as inventors

means of a conical seat 3 and a union nut 4 clamped. The flange 2 α of the encoder rotor has conical bores 2 c , through which the mechanical connection of the synthetic resin binder 2 e to the flange 2 a is promoted. The inner slip ring 2 / and the outer slip ring 2g, via which the direct current is fed to the encoder rotor, and the collector segments 2h , from which the three-phase current with an approximately sinusoidal voltage curve can be taken, are arranged on one end of the encoder rotor 2. The collector segments and the slip rings are provided with conical projections 2i, 2 k and 2 p , which facilitate the mechanical connection of these parts with the synthetic resin binder 2 e. The electrical connections between the slip rings and the collector segments are established by the transfer wires 2m .

The unit coil 10 containing all partial resistances is arranged on the other end face of the encoder rotor 2. The individual partial resistances are loosely wound on one another in a coil body 10 α of U-shaped cross section. The ends of the partial resistances are connected to connecting wires 10 b , which are led out laterally through the holes 10 c (FIG. 4) provided for this purpose in the coil body 10 a.

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The fully wound unit coil 10 is placed in the jacket 11 provided with cooling fins 11 α and 11 h , and then the jacket 11 is pressed against the flange 2 α by means of the nut 12. After the connection wires 10 b are connected to the collector segments 2 h and the protective sleeve 13 is attached, the partial resistances in the unit coil 10 and the latter in the jacket 11 are potted at the same time. The synthetic resin compound used for this purpose is introduced in the low-viscosity state through the openings 11 c in the jacket 11 and the openings 10 d in the bobbin 10. The openings 10 c for the connection wires 10 & the partial resistors are dimensioned so that the liquid synthetic resin mass can penetrate to the flange 2 a. By filling in all of the. Cavities with a potting compound is achieved that the unit coil 10 is tightly enclosed by the jacket 11 and thus that in the unit coil

10 or heat generated in the partial resistors via the jacket 11 and its cooling fins 11 and α

11 b is well derived.

With 2r the wires are designated, each two Collector segments, which are preceded by a common partial resistance, connects to one another.

In the brush bridge 8 attached to the housing 7 with screws 6, the brushes 9 are for the supply of the Direct current and the extraction of the three-phase current generated axially parallel to the drive shaft 1.

Claims (1)

Claim:
5 Encoder unit for electric remote drive, which we fed with direct current, d and for generation of three-phase current is used for the synchronous operation of receiver motors, in which ίο the brushes for the supply of the direct current as well as the brushes for the extraction of the generated three-phase current are arranged axially parallel to the drive shaft on one face of the encoder rotor, characterized in that all partial resistances connected to the generation of the three-phase current in the direct current circuit in a common coil body, ( 10 α) wound on top of one another and poured into a jacket (11) provided with cooling ribs (11, 11 b) on the other ao whose end face of the encoder rotor (2) are arranged. Considered publications:
German Patent No. 684,886;
German patent application L 11405 VIII b / 21 c
(announced on 4.11, 1954). 1 sheet of drawings