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synchronous motor

A uniform, stator coil technology, applied in the direction of electric steering mechanism, electrical components, electromechanical devices, etc., can solve the problems of low torque quality, small detent torque, etc., and achieve the effect of improving safety

Active Publication Date: 2016-08-17
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In addition, motors with 12 stator teeth and 10 rotor poles are known, which can achieve lower detent torques compared to motors with 12 stator teeth and 8 rotor poles, but compared with motors with 18 stator teeth and 8 rotor poles. Only lower torque qualities can be achieved compared to motors with 8 rotor poles

Method used

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Examples

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Embodiment Construction

[0029] figure 1 Indicates the cross-section of the motor 1 . The electric machine comprises a stator 2 surrounding a rotor 4 rotatable about a central axis M. The electric machine 1 is a synchronous electric machine in the exemplary embodiment shown.

[0030] The stator 2 includes 18 stator teeth 3 , which project radially inwards from the stator body of the stator 2 in the direction of the rotor 4 . That is to say, the stator teeth 3 are oriented in the direction of the center axis M of the electric machine 1 . The stator teeth 3 are arranged in the stator body at uniform intervals in the tangential direction, ie at equal offset angles.

[0031] The rotor 4 is provided rotatably around a central axis M and has permanent magnets 6 . The permanent magnets 6 form the rotor poles 8 and are arranged such that their poles extend radially. Adjacent permanent magnets 6 are oppositely polarized. The rotor 4 shown has fourteen rotor poles 8 in number. as in figure 1 As shown in...

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PUM

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Abstract

The invention relates to an electric machine (1), comprising: a rotor (4) with 14 rotor poles (8), arranged rotatably around a central axis; a stator (2) with 18 stator teeth (3), These stator teeth (3) extend radially with respect to the central axis from the stator (2) to the rotor (4), and are characterized in that each stator tooth (3) consists of a stator coil (9) surrounding only one stator tooth )around.

Description

technical field [0001] The invention relates to an electric machine with 18 stator teeth and 14 rotor poles, especially for use in electric power steering. Background technique [0002] In electric drives in steering systems with electric motor support for automotive applications, it is required that the fluctuations of the drive torque generated at the shaft be as small as possible. Permanent-magnet-excited, electronically commutated synchronous motors are usually used for this application, since such motors have advantages due to their power density, their efficiency and their control possibilities. [0003] However, in electronically commutated synchronous motors, so-called harmonic torques are generated by the harmonics, which can lead to strong fluctuations in the torque. Such drives must therefore be designed in such a way that these harmonics are reduced as much as possible or their influence on the torque variation is as small as possible. In addition, in such sync...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K3/28H02K29/03B62D5/04
CPCH02K3/28B62D5/0403H02K29/03
Inventor Q-N·特兰K-J·罗特K·罗伊特林格
Owner ROBERT BOSCH GMBH