Method and apparatus for estimating effective electromagnetic force in electric machine

A technology of electromagnetic force and unit force, which is applied in the field of estimating the effective electromagnetic force in the motor, can solve the problems of no verification and incomplete reliability of electromagnetic force estimation

Pending Publication Date: 2022-03-11
SIEMENS IND SOFTWARE NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, using this procedure, the physical output, such as the vibration of this estimated force, is independent of the physical input, such as the current, making the estimation of the electromagnetic force not fully reliable nor verified.

Method used

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  • Method and apparatus for estimating effective electromagnetic force in electric machine
  • Method and apparatus for estimating effective electromagnetic force in electric machine
  • Method and apparatus for estimating effective electromagnetic force in electric machine

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Embodiment Construction

[0060] figure 1 A flow chart of a possible exemplary embodiment of a method for estimating electromagnetic forces effective in an electric machine during operation of the electric machine is schematically shown. An effective electromagnetic force must be understood as a force that occurs when the electric machine 20 is under current and voltage and is in motion and thus in operation. This operation can be performed with or without a load connected to the motor 20 .

[0061] In the exemplary embodiment shown, the method comprises several main steps. In the first step S1, when the motor 20 is running under at least one operating condition, at least one first operating parameter Y of the motor 20 is measured tot . at least one first operating parameter Y dependent on the frequency ω tot Vibrational responses are described, including, for example, acceleration, velocity, displacement, or acoustic responses, such as pressures measured on the outer surface of and around the mot...

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Abstract

Generally, the present invention relates to a method and apparatus for estimating an effective electromagnetic force in an electric machine. The method comprises the following steps: measuring (S1) at least one first operating parameter (Ytot) of the electric machine (20) while the electric machine (20) is operating under at least one operating condition, and calculating (S2) the electrical machine (20) by multiplying the measured at least one first operating parameter (Ytot) by a corresponding second operating parameter provided by a stored structural / vibratory acoustic model (M). An electromagnetic force (Ftot) effective in the electric machine (20) during operation of the electric machine (20) is estimated (S2). As a result of the invention, it is possible to measure an electromagnetic force within the electric machine, in particular an electromagnetic force in an air gap between the stator and the rotor of the electric machine, and to identify and eliminate interference noise and / or vibrations caused by the electromagnetic force.

Description

technical field [0001] The invention relates to a method and a device for estimating the effective electromagnetic force in an electrical machine. Background technique [0002] Suppression of unwanted noise and vibration caused by electrical machines, especially rotating machines, has always been an important research problem in the automotive industry. This is due to the increasing prevalence of electrified components inside passenger cars. Electromagnetic forces in the motor can cause high vibrations and / or noise, which can cause acoustic disturbance to passengers or anyone else around the motor. Reducing high vibrations and / or noise requires predicting electromagnetic forces, especially in the areas where they occur. [0003] Measuring electromagnetic (EM) forces in rotating electrical machines is not feasible with common sensing techniques. Electromagnetic forces occur between the stator and rotor of the motor, especially between the rotor teeth and the stator teeth. ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G01H1/00G01M1/22G01M15/14
CPCG01H1/003H02K11/20
Inventor法宾·绍韦科特
OwnerSIEMENS IND SOFTWARE NV