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cage rotor

A rotor and cage-shaped technology, which is applied in the field of cage-shaped rotors, can solve the problems of cage-shaped rotor damage, adverse effects of asynchronous motor life and operation duration, etc., and achieve the effect of avoiding the fracture of the joint position and strengthening the connection

Active Publication Date: 2016-06-29
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] During operation of the induction motor, the cage rotor is exposed to high centrifugal forces, which can damage the cage rotor and thus adversely affect the service life or operating duration of the induction motor

Method used

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Embodiment Construction

[0091] figure 1 One embodiment of a cage rotor of an asynchronous machine of hybrid construction is shown. Shown is a laminated rotor core 1 of an asynchronous machine, which is retracted on a shaft 11 . When producing the cage rotor, firstly a rotor bar 4 , which is preferably made of copper, is inserted into the slot 3 of the rotor laminated core 1 . As can be seen, the cross-section of the conductor 4 is smaller than the cross-sectional area of ​​the slot 3 . The remaining cross-section of the groove 3 therefore remains free after the copper rod has been inserted. To manufacture the short-circuit rotor, the die-casting method is applied in the next step. In this method, a short-circuit ring is produced which is in contact with the copper rod on the end side, and at the same time the remaining space of the groove 3 which remains empty is filled with the melt. Inside the groove, after hardening of the aluminum melt, an aluminum rod part 6 is formed in the remaining cross-...

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Abstract

A cage rotor for an asynchronous machine with rotor bars (4) in a rotor stack (1), wherein the bars (4) are tilted in tilted positions (12, 13) when the bars (4) are not yet cast . In this case, the rotor bar (4) can also have channels (27) on the radially outer surface, the openings (29) of which are smaller than the shoulders (32, 33 ) of the bar (4) on the radially outer surface of the bar. )width.

Description

technical field [0001] The invention relates to a cage rotor for an asynchronous motor, a cage rotor bar and an asynchronous motor. Background technique [0002] A cage rotor is known from DE4308683A1. The rotor comprises a lamination stack with slots into which shorting bars made of copper are first inserted. On the end side, the copper rods are connected to one another via short-circuit rings. These short-circuit rings are produced from aluminum by die-casting. During the casting of the short-circuit ring, the residual cross-section remaining in the groove relative to the inserted copper rod is simultaneously cast out of aluminum, so that the short-circuit ring is connected to the die-cast rod part formed in the residual cross-section. [0003] Since copper has a very high electrical conductivity compared to aluminum, in this way the efficiency of an asynchronous motor of this type relative to an asynchronous motor with a cage rotor made entirely of aluminum die-cast ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K17/16H02K15/00
CPCH02K15/0012H02K17/20
Inventor 克劳斯·比特纳米夏埃尔·米勒诺贝特·韦纳
Owner SIEMENS AG