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Safety circuit for electric motors of electromechanical steering gears

A technology of electric motor and steering gear, which is applied in electric steering mechanism, steering mechanism, motor control and other directions, and can solve the problems of not strong enough and relatively expensive.

Active Publication Date: 2016-05-25
THYSSENKRUPP PRESTA AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this purpose, electromechanical relays are proposed in some parts of the prior art, but these are mechanically insufficiently robust and comparatively expensive for use in vehicles

Method used

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  • Safety circuit for electric motors of electromechanical steering gears
  • Safety circuit for electric motors of electromechanical steering gears
  • Safety circuit for electric motors of electromechanical steering gears

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] exist figure 1 The electromechanical servo steering is schematically shown in , wherein the illustration is intended to illustrate different embodiments.

[0028] A steering shaft 1 is connected to a steering wheel 2 for manipulation by a driver. The tie rod 3 is connected in a known manner to the steered wheels 4 of the vehicle. The rotation of the steering shaft 1 brings about an axial displacement of the toothed rack 5 by means of the pinion 6 , which is connected in a rotationally fixed manner to the steering shaft 1 .

[0029] The electromechanical servo steering can have a steering gear-side motor housing 7 , a steering pinion-side motor housing 8 or a steering column-side motor housing 9 . The invention is independent of the specific design of the diverter. The motor housing 7, 8 or 9 is connected to a controller 10, which additionally receives a torque signal from a torque sensor 11 via a signal line 12 and sends a corresponding control signal via a signal li...

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PUM

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Abstract

The invention relates to a motor vehicle power steering mechanism having four groups of MOSFETs, in which with respect to the direct current voltage vehicle electrical system the MOSFETs of the first group (20) and of the second group (21) are arranged with their parasitic diodes in the reverse direction and the MOSFETs of the third group (31) and / or of the fourth group (30) are arranged with their parasitic diodes in the forward direction.

Description

technical field [0001] The invention relates to an electromechanical vehicle servo steering gear. Background technique [0002] Electromechanical steering units usually have a permanently excited synchronous motor as a servomotor. Servomotors of this type of construction are activated by the controller via a set of MOSFETs (Metal Oxide Semiconductor Field Effect Transistors), a total of six MOSFETs being arranged in the three phase windings. Each MOSFET connects the associated phase winding to the vehicle power supply or ground potential. This takes place at high frequencies, so that the time-averaged value acts as the effective voltage in the phase windings. [0003] Permanently excited synchronous motors have the property that in the event of an electrical fault, such as a short circuit in the motor or in the excitation mechanism, a braking torque is generated, so that such a fault can not only cause the failure of the power steering mechanism, but also counteract the ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62D5/04H02P29/02
CPCB62D5/0484B62D5/0487H02H7/1225
Inventor 杰尔杰伊·茹扎克
Owner THYSSENKRUPP PRESTA AG