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Method for checking the position of the rotor of an electric machine

A technology of rotor and stator, which is applied in the field of checking the position of the rotor of the motor, and can solve problems such as inability to diagnose on-board

Active Publication Date: 2020-03-03
ROBERT BOSCH GMBH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such a method has the disadvantage that the drive must also rotate freely during the drilling, that is to say must not be connected to other units
Therefore said method especially cannot be carried out as so-called on-board diagnosis

Method used

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  • Method for checking the position of the rotor of an electric machine
  • Method for checking the position of the rotor of an electric machine
  • Method for checking the position of the rotor of an electric machine

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Experimental program
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Embodiment Construction

[0033] exist figure 1A configuration for detecting the position of the rotor of an electric machine is schematically shown in . On the rotating shaft 30 of the rotor is mounted a magnet 15 which rotates at the mechanical angular velocity of the rotor. An anisotropic magnetoresistive sensor 10 , a so-called AMR sensor, is mounted at a small distance from magnet 15 . If magnet 15 rotates at a constant rotational speed relative to AMR sensor 10 , the magnetic field of magnet 15 produces a sinusoidal change in reluctance in AMR sensor 10 .

[0034] exist figure 2 In FIG. 2 , two output signals of the AMR sensor 10 , namely a sine signal 11 and a cosine signal 12 , are shown as an example with respect to a geometric angle φ indicating the geometric position of the rotor. The geometric angle φ here includes a complete mechanical revolution.

[0035] The output signal of the AMR sensor 10 is processed by means of an amplifier 40 and an analog-to-digital converter 41 and is deter...

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Abstract

The invention relates to a method for checking the position of the rotor of an electrical machine relative to the stator, wherein three current pulses (I d ), where the three current pulses (I d ) comprising a first current pulse, a current pulse offset by a predetermined positive phase angle relative to the first current pulse and a predetermined negative phase angle relative to the first current pulse phase-angle-shifted current pulses, wherein three currents induced by said three current pulses in the windings of said rotor are detected, and wherein according to the corresponding amplitudes of said three induced currents to check the position of the rotor. Furthermore, the invention relates to a method for ascertaining the position of the rotor of an electrical machine relative to the stator, wherein the geometric angle of the rotor associated with the q current pulse in the stator is ascertained.

Description

technical field [0001] The invention relates to a method for checking the position of the rotor of an electrical machine relative to the stator by means of current pulses in the windings of the stator and a method for checking the position of the rotor of an electric machine by means of current pulses in the windings of the stator A method of specifying the position of the rotor of a motor relative to the stator. Background technique [0002] Electric machines, especially generators, can be used in motor vehicles to convert mechanical energy into electrical energy. Claw-pole generators are usually used for this purpose, which are usually equipped with an electric drive. Because claw pole generators usually produce three-phase alternating current, rectification is required for common motor vehicle-direct current-vehicle circuits. Rectifiers based on semiconductor diodes can be used for this purpose. [0003] The generator can also be used to start the internal combustion e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/16
CPCH02P6/185H02P21/18
Inventor J.勒斯纳
Owner ROBERT BOSCH GMBH