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Rotor and rotor circuit for an electric motor

A rotor circuit and rotor technology, which is applied in the field of separately excited synchronous motors, can solve problems such as energy loss and damage to rotor shaft bearings.

Active Publication Date: 2019-08-23
BAYERISCHE MOTOREN WERKE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such currents lead on the one hand to undesired energy losses and on the other hand can also cause damage to the rotor shaft itself or its bearings

Method used

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  • Rotor and rotor circuit for an electric motor
  • Rotor and rotor circuit for an electric motor
  • Rotor and rotor circuit for an electric motor

Examples

Experimental program
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Embodiment Construction

[0035] In the following figures, the same reference numerals are generally used for identical or mutually corresponding elements of the invention.

[0036] First to explain the prior art, refer to figure 1 and 2 A rotor R according to the prior art is described, from which the invention proceeds. exist figure 1 The left side of , schematically shows such a rotor R, which has n=6 pole pairs by way of example. The rotor R has a rotor body K which is constructed rotationally symmetrically with respect to a rotor shaft W which is fixedly connected to the rotor body K and is rotatably mounted about it by means of the rotor shaft W. The rotor has six radially extending armatures distributed uniformly around the circumference and manufactured from ferromagnetic material, preferably from parallel ferrous plates insulated from one another. A respective rotor winding L1 to L6 is wound around the armature, so that the rotor windings each form an electromagnet with the respective arma...

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PUM

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Abstract

The invention relates to a rotor for an electric motor. The rotor comprises a rotor body and an even number n of pole pairs arranged on the rotor body with respectively one rotor winding. The rotor windings of the pole pair are connected in series between two electrical connections of the rotor, which can be particularly slip ring connections, used to supply or conduct away an electrical excitation current through the rotor windings. The series circuit has a first section comprising the n / 2 rotor windings, from a first of the connections, arranged first in the series circuit, and a second section comprising the n / 2 rotor windings remaining in the series circuit and in addition arranged upstream of the second of the connections. The rotor windings and the series circuit are designed in sucha way that during the application of a direct-current voltage between the two connections in each of the rotor windings of the first section, the radial component of the direct-current flow in the series circuit extends though the entire respective rotor winding, from an outer side to an inner side of the rotor winding, and in each of the rotor windings of the second section, in reverse, from anouter side to an inner side of the rotor winding.

Description

technical field [0001] The invention relates to a rotor for an electric machine, in particular a separately excited synchronous machine, a rotor circuit comprising such a rotor for actuating the rotor, and a separately excited synchronous machine comprising such a rotor. Background technique [0002] In many electrical systems, electric motors are used for the most diverse tasks. In electrically operated vehicles, in particular motor vehicles such as passenger cars, the electric machine is used as a traction machine. The most diverse constructions are known among electric machines, in particular so-called "synchronous machines". This is understood to mean single-phase and three-phase current synchronous motors in motor operation, in which the usually constantly magnetized rotor (rotating part) is synchronously driven (without overload) by the rotating magnetic field moving in the stator during normal operation. [0003] The rotor can be formed by means of at least one perm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K19/12H02K11/02
CPCH02K19/12H02K11/02H02K11/40H02K3/18H02K3/52
Inventor H·赫尔曼
Owner BAYERISCHE MOTOREN WERKE AG