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Device and method for measuring rotor parameters

A rotor and parameter technology, applied in the direction of measuring devices, conversion sensor output, instruments, etc., can solve problems such as errors and expensive resolvers, and achieve the effect of improving accuracy

Active Publication Date: 2018-09-04
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the mechanical construction (large number of measuring coils and poles) and the physical measuring principle, a higher order of magnitude occurs with respect to the temporal angular resolution, which is differentiated as a function of time (calculation of the current rotational speed and from This causes a large error when calculating the current speed)
Furthermore, such a resolver is very expensive

Method used

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  • Device and method for measuring rotor parameters
  • Device and method for measuring rotor parameters
  • Device and method for measuring rotor parameters

Examples

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Embodiment Construction

[0104] Figure 1a , 1b, 1c show a device 1 according to the invention for measuring a rotor parameter or a plurality of rotor parameters in states with different rotor angles. The device 1 has incremental dimensioning elements 11 with incremental markings 12 , which are connected in a rotationally fixed manner to a rotor. An incremental size sensor 15 is arranged opposite the incremental size materializing element 11 . Here, the incremental dimensioning element is a toothing and the incremental marking 12 is a tooth. Furthermore, device 1 has an evaluation unit 30 connected to incremental size sensor 15 and a timer 40 connected to the evaluation unit. Two or all three of the component evaluation unit 30 , the chronograph 40 and the incremental size sensor 15 can be present as an integral structural unit. The chronograph 40 is arranged to be reset and restarted due to the passage of any one of the incremental markers 12 , for example by means of the evaluation unit 30 . The...

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Abstract

The invention relates to a device (1) for measuring parameters of a rotor, which has: - an incremental size embodying element (11) connected in a non-rotatable manner to the rotor or stator, which has incremental markings (12), - An incremental size sensor (15) arranged opposite to the incremental size materialization element, when the incremental size materialization element is connected to the rotor without relative rotation, the incremental size sensor is arranged on the on the stator, and, when the incremental size embodying element is non-rotatably connected to the stator, the incremental size sensor is arranged on the rotor, - and an evaluation unit (30), wherein the The device has a chronograph (40) which is reset and re-opened each time an incremental marker passes by the incremental size sensor, and wherein the evaluation unit values ​​for determining rotor parameters for an intermediate rotational position of the rotor, the intermediate rotational position being located between two rotational positions of the rotor corresponding to two adjacent incremental marks ( 12.1, 12.2), the rotor passes by these two adjacent incremental marks successively. Furthermore, the invention relates to a method for measuring rotor parameters and a method for reducing the rotational imbalance of the rotor.

Description

technical field [0001] The invention relates to a device and a method for measuring rotor parameters, in particular a rotor parameter of a rotor of an electric motor (E-Motor) of a hybrid module. Background technique [0002] To measure the rotor position of an electric machine in a hybrid drive train, a resolver based on the reluctance principle or the eddy current principle is used. These measuring systems determine the relative angle (polar angle) of the rotor poles relative to the stator poles. Due to the mechanical construction (large number of measuring coils and poles) and the physical measuring principle, a higher order of magnitude occurs in terms of temporal angular resolution, which is differentiated as a function of time (calculation of the current rotational speed and from This results in large errors when calculating the current rotational speed). Furthermore, such resolvers are very expensive. Contents of the invention [0003] The invention therefore add...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/00H02K11/21
CPCG01D5/00G01D5/24419G01D5/2454G01D18/001G01D5/245
Inventor O·维尔纳M·胡贝尔
Owner SCHAEFFLER TECH AG & CO KG