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Electrical machine

An electrical contact and wire technology, applied in asynchronous induction motors, electrical components, electromechanical devices, etc., can solve problems such as the formation of short-circuit rod unassisted torque, fatigue fracture, etc.

Inactive Publication Date: 2009-07-29
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The disadvantage here is that the short-circuit bar has to be connected to its short-circuit ring in a separate process, the short-circuit bar protruding from the end face of the rotor does not contribute to the development of the torque
In addition, due to the relatively rigid structure of the shorting cage, fatigue fractures can occur especially at the brazed locations

Method used

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Embodiment Construction

[0014] figure 1 The squirrel-cage rotor is shown in expanded view with a laminated core 1 with several slots n, n+1, n+2 protruding in the laminated core 1 , for example as shown. The wire L2 in a bottom layer is located in the slots and is wound through the slots in a meandering manner opposite to the wire L1 in an upper layer. The wires L1 and L2 are preferably twisted wires made of individual metal wires. Wherein, the twisted wires are especially formed by twisting with a predetermined discharge distance.

[0015] The electrical contacting of the conductors L1 and L2 takes place by pressing the preferably bare stranded conductors in the slots n, n+1, n+2. At this point, the tank walls generate the required reaction pressure. Other electrical contacting methods can also be used, for example electrical contacting can be achieved in particular by means of an electrically conductive potting compound which fills the grooves or certain predetermined axial groove regions after ...

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PUM

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Abstract

In order to prevent, among other things, fatigue failures in squirrel-cage rotors of electrical machines, the invention provides that the squirrel-cage winding is comprised of flexible conductors.

Description

technical field [0001] The invention relates to an electric machine with a squirrel-cage rotor. Background technique [0002] In addition, the asynchronous machine has a short-circuit winding as the rotor, in each case a rod is located in one of the slots, and the rods are short-circuited on the end face of the rotor by rings. The rod and the shorting ring are made of high-resistance aluminum or an aluminum alloy in a die-casting process. However, copper, bronze and brass can also be used as electrical conductors. The solid rods of the short-circuit winding are usually plugged into the rotor bare and are each soldered to the short-circuit rings. [0003] The disadvantage here is that the short-circuit bar has to be connected to its short-circuit ring in a separate process, and the short-circuit bar protruding from the end face of the rotor does not contribute to the development of the torque. In addition, due to the relatively rigid structure of the short-circuit squirrel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K17/16H02K3/14H02K3/28
CPCH02K17/165H02K17/18
Inventor 格哈特·德雷斯尔
Owner SIEMENS AG