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Electrical machine particular for electric or hybrid motor vehicle

A technology of motor unit and torque, applied in the direction of electrical components, electric components, electromechanical devices, etc., can solve the problems of low stability, easy interference, insufficient shielding, etc., and achieve the effect of minimizing wear and tear

Inactive Publication Date: 2017-06-13
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the geometry of such a contactless method of measuring the rotational torque in the sensor bearing of Pedelec is sometimes unreliable and / or prone to interference, since for the rotational torque measurement it is taken into account that the measured, separately detected sensor bearing parts are relatively for precise positioning of rotating parts
In the prior art, this is mainly achieved by complex additional construction of the housing, in particular by additional carrier or sleeve elements, which generally consist of plastics with low mechanical stability
Furthermore, the problem with the aforementioned Pedelec is that the integration of the contactless method of measuring the rotational torque into a control-technically complex (electrified) overall system can only be realized with great effort, since such sensor bearings have hitherto only been able to Transmission of control signals without reaction
Furthermore, the sensor bearing is not adequately shielded against direct electrical interference influences of the environment for the state of the art

Method used

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  • Electrical machine particular for electric or hybrid motor vehicle
  • Electrical machine particular for electric or hybrid motor vehicle
  • Electrical machine particular for electric or hybrid motor vehicle

Examples

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Embodiment Construction

[0026] Before describing the illustrated embodiment in detail, a brief introduction to the known mechanical working background between torsional forces and rotational moments or torques is provided.

[0027]When a turning moment causes a twist (torsion force) of a rod, beam or shaft, it is called a torque. Torque acts on both ends of a twisted object as action and reaction. In a shaft with a constant cross section, the elastic torsion is proportional to the magnitude of the torque. Similar to in control, only shear or torsional stress occurs in torsion. The torsional stress is defined as the ratio of the torque acting when an object is twisted to the resistive moment. The respective currently acting rotational torque can be detected via the measurement of the respective current torque force or twist.

[0028] However, several boundary conditions must be taken care of in practical applications. Only relatively small torsion angles should therefore occur in a reversible or e...

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Abstract

The invention relates to an electrical machine unit. The electrical machine unit comprises an electrical machine (2) with a stator (22) and a rotor (20) with a rotor shaft (18). The stator (22) is connected to a stationary component (28) of a non-contact torque measuring device (6), and the rotor shaft (18) is connected to a rotating component (30). The rotating component (30) is designed to measure a torsion of the rotor shaft (18) caused by a torque and to send the measured value to the stationary component (28) without contact. The electrical machine unit is provided, in particular, for an electric or hybrid motor vehicle.

Description

technical field [0001] The invention relates to an electric machine unit, in particular for an electric or hybrid vehicle, having an electric machine, wherein the electric machine comprises a stator and a rotor with a rotor shaft. Background technique [0002] An electric machine is generally understood to be an electromechanical converter, which can have various modes of operation. It can thus be used exclusively as an electric drive or exclusively as a generator or alternatively either as an electric drive or as a generator. For example, an electric machine in an electric or hybrid vehicle operates in motor operation when propelling the vehicle and in generator operation when braking. [0003] In general, it is important for the operation of an electric machine to know which rotational torque is currently transmitted via the rotor shaft of the electric machine. [0004] It is known that the rotational torque applied to the electric machine is determined directly via the ...

Claims

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Application Information

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IPC IPC(8): H02K11/24H02K11/01
CPCH02K11/24H02K11/01G01L3/102
Inventor 福尔克尔·迪茨
Owner SIEMENS AG
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