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Electric machine with corresponding at least two clamping lugs for fixing permanent magnets

A permanent magnet and clamping technology, which is applied in the direction of magnetic circuits, electromechanical devices, electrical components, etc., can solve the problems of difficult installation of permanent magnets, and achieve the effects of small torque fluctuation, small positioning torque, and low cost

Active Publication Date: 2019-06-21
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been found that the mounting of the permanent magnet is made difficult due to the second clamping lug

Method used

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  • Electric machine with corresponding at least two clamping lugs for fixing permanent magnets
  • Electric machine with corresponding at least two clamping lugs for fixing permanent magnets
  • Electric machine with corresponding at least two clamping lugs for fixing permanent magnets

Examples

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Effect test

Embodiment Construction

[0046] figure 1 The electrical machine 100 has an inner rotor 10 which is configured as a spoked rotor and extends concentrically around a shaft 20 capable of surrounding an axis of rotation 2 (cf. Figure 2a-Figure 2g , Figure 3a-Figure 3h ) is supported in a rotational manner. Furthermore, the electric machine has a stator 50 arranged on the outside.

[0047] The stator 50 has a yoke 53 on which a plurality of teeth 52 are arranged. With the stator 50 installed, the teeth 52 are wound with windings 54 which are provided for generating an alternating magnetic field. To this end, gaps 51 for receiving the windings 54 are provided between the teeth 52 . However, in figure 1 For the sake of clarity, only one winding 54 is shown exemplarily.

[0048] The spoked rotor 10 has an inner ring 71 which extends concentrically around the axis of rotation 2 and has a through hole 77 in the center (cf. Figure 2a-Figure 2g , Figure 3a-Figure 3h ), the through hole is configured t...

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Abstract

The present invention relates to a spoke rotor for an electric machine, having a main body which extends concentrically around an axis of rotation and which has a plurality of pole shoes, between which permanent magnets are arranged in holders, wherein there is provided for each permanent magnet in its holder in each case at least one first clamping element and one second clamping element, which fixes said permanent magnet in the holder, wherein the first clamping element fixes the permanent magnet in a radial direction relative to the axis of rotation and the second clamping element fixes it in a tangential direction relative to the axis of rotation, and wherein in each case a movement clearance is provided for each second clamping element. The present invention also relates to a clamping lamella, in particular for such a spoke rotor. The present invention also relates to an electric machine comprising such a spoke rotor. The present invention also relates to a device, in particular a hand-held power tool, an adjustment drive for a motor vehicle, a power steering system, a servo motor, an electromechanical brake booster or a vehicle drive, comprising such an electric machine.

Description

technical field [0001] The invention relates to the positioning and fixing of permanent magnets in a spoked rotor of a brushless permanent magnet-excited electric machine. Background technique [0002] Electric machines with a brushless inner rotor designed as a spoked rotor are used in numerous applications. An example is an electric power steering machine (EPS, E lectric P ower-assisted S teering drive), drives for cooling circuits of combustion motors, vehicle drives for electric scooters or bicycles (eScooter, eBike), electromechanical brake amplifiers (iBooster), active stabilizer (ARS, A active R oll S tabilisation), for industrial automation devices, for robots and servo motors for machine tools. Rectangular permanent magnets are arranged in such a rotor like the spokes of a bicycle. The permanent magnets thus extend along their length towards the axial direction of the rotor, along their width towards the radial direction and along their depth towards the tan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/27
CPCH02K1/2773
Inventor S.埃文斯S.A.埃文斯T.克尼希
Owner ROBERT BOSCH GMBH
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