NEW POLYPHASE INDUCTION MOTOR WITH ALUMINUM WINDING

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00810A005200780009-3
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 2
• Document Creation Date: December 20, 2016
• Sequence Number: 9
• Content Type: REPORT

about 1,500 volts. 25X1
2. The increase in diameter of Iso-Perlon covered wires is 0.04 - 0.06 m?n, whereas
with ordinary covered wires it is about 0.2 - 0.3 mm.v The insulation of Iso-
Perlon lacquer wire permits a temperature rise of 80 ~ C., while the permissible
temperature rise of cotton- or cellulose-insulated wires if only 600 C.
without harming the lacquer coating. The break-down voltage of both wires is-_--
9 Ntet any
NO I
Iso-Perlon lacquered wires can be hammered out to abo
50 percent without the lacquer coating showing any si
extreme hardness and an unusually high tensile stren
potentialities. The Perlon lacquer coating (Iso-Per1rn ?aBksehioht) possesses
Approved For Release 2007/09/21: CIA-RDP80-0081 OA005200780009-3
J Pelyphaea mien der v*U ,1 Ea t
Vindir
__ I
a, is"
1. Early in _ ,- as -'a result of research carried out in-the nonferrous metal roiling
mill at Hettstedt, a wire lacquer (Drahtlack),,with Perlon base was produced, which
in contrast to the previously used oil lacqukur(0ellack), clings to alb.
With similar electric qualities, it far outstrips the oil lacquer in mechanical
3.
Smaller air-cooled water-tight motors have already been wound with lacquer-covered
wire. Their lamination diameter (Bleehdurchmesser) is enlarged at most by three
percent. , By deepening the slot (Nut) it was possible to accommodate just as much
active material, so that the lowered conductivity was equalized without overstep-
ping the permissible heating limits.. Motors under three kilowatts and encased
motors, whose laminations are attached to the casing, are not in most cases sub-
ject to a reduction in power rating. -
4. It is therefore possible today to construct housings of polyphase induction motors
out of aluminum and to maintain the dimensions of the.former copper wound motors.
The outstanding qualities of the Iso-Perlon-lacquer wire give a certain advantage
to this aluminum-vannd motor over the copper wound motor with normal oil-lacquer
insulation, or cotton and cellulose insulated winding.
5. The greatest difficulties were presented by the switch connections (Schaltverbindungen)
and the connections on the terminal board (Klemrnverbindungen am Klemmbrett). For
switch connections the so-called Alku-wire is now available. This is an aluminum
wire with thin copper jacket. This material is also produced as insulated cab$ '
Approved For Release 2007/09/21: CIA-RDP80-0081 OA005200780009-3
 . i . Approved For Release 2007/09/21 : CIA-RDP80-00810A005200780009-3
SBOBET CCM--ROZ
U. S. 0FPICIALS ONLY
consisting of dlkm-wires about one s431.i tee in diameter. This Alka-wire can
be tinted (vozsissa) to the tenmisal based sIde, bent into loops, and
rally ass .d to the tesmiaal beamed with the mss of spring washers with
high btsddiV (1st lrAsrlit van lotsltlse Left).
on tir a>EtteD a`l s, the eopper
sevestag is dipped (.t aunt) mind tis wine is W204 to the veil leads (nit
doss Seialtestd- der tiiet2mtig). Noamel sable shoes can be moldered to Alku-sable.
6. The Oompllop~. t of alw?isrso.+trerssd motors was begun at the
early in 195L and gdei 7 completed so that current production of
astess b" almost one and a halt years experieaee behind it. The trial motors,
ineludiag a 200 W aatee which was subjected to pest strain as a load generator
(Betas NO -
tee), have steed up examptiosall r von and as yet given so cause
for eoaplajat. In addition, the usual sbort?-aireuits, which in the case of
oil- wires seesasted seaotimss for 25 psresaat of production, have praetioally
leased sines the en sat et Iss?Perl+em lacquered wire. ?Moreover, tests in
the t rc$.sl ~ti~ r'M (2*49 - - on-) how bow m eft with tenperatnres up to 50t C.
sad a rslatiwbslhi~ti er pesresMt, viS Rees equipped with Imo-Perlen lao.-
quer wire Utedbe ( afttdama ) vi heat-pr6tee'tion insulation.
Thews tests veto learn eert agree a months. The motors were left
inactive at night, ss tint the vapor In , and the next day they
were again set in notion. During the entire test period not a single ease of
failure oeonerad. Sins the principal scnorees of difficulty in a1v oinum motors
were formerly the switch connections and the terminal connections, special atten-
tion was given to these factors during the tests. The testing of contacts was
carried out over a period of ems year. In no ease was an increase of the contact-
resistaaee diseovem
7. The fall wing table gives a comparison of the technical data of a ley, kW motor with
copper veil and a 44. kW meter mind with alumina wire.
Affitm Copper-we=d ,y4 kW
Altsoinat-eromd ,~ kW
bw
0.897
0.89
Increase of
89.5 percent 5013? C.
88.4 reent 68.10 C.
9 CONTROL
U. S. OFFICIALS ONLY
Approved For Release 2007/09/21: CIA-RDP80-00810A005200780009-3