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Method for determining the position of a positioning element of an electrically-operated actuator, corresponding circuit arrangement and device

A technology for positioning components and actuators, applied in electrical components, circuits, transportation and packaging, etc., can solve problems affecting output signals, achieve low cost, continuous and reliable operation, and achieve the effect of over-temperature protection

Inactive Publication Date: 2006-11-22
HYDAC ELECTRONICS GMBH
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AI Technical Summary

Problems solved by technology

[0005] The existing methods have the disadvantage that the adjustment of the switching frequency also depends on the ohmic resistance of the coil, which is proportionally strongly dependent on the temperature, so that the temperature influences the output signal for determining the armature position as a disturbance quantity

Method used

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  • Method for determining the position of a positioning element of an electrically-operated actuator, corresponding circuit arrangement and device
  • Method for determining the position of a positioning element of an electrically-operated actuator, corresponding circuit arrangement and device
  • Method for determining the position of a positioning element of an electrically-operated actuator, corresponding circuit arrangement and device

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Embodiment Construction

[0030] figure 1 Show device 12 of the present invention ( Figure 5 ) The variation curve of the coil current i of the winding coil 10 of an electromagnet with time t. In the opening process 01 Medium rated voltage U o Added to the electromagnet, since the ohmic resistance of the winding coil is R, the current i o The final value of i o =U o / R gives. During the shutdown process t 1 2 Medium rated voltage U oCut off from the winding coil 10 and generate an exponentially decaying current i(t). The corresponding time constant τ is determined by the ratio of the coil inductance L to the ohmic resistance R of the winding coil. for figure 1 As shown in the i(t) curve, the equipment temperature T is at the first value T 1 .

[0031] according to Figure 5 The embodiment of the device 12 according to the invention is shown as a hydraulic proportional valve 42 , the electromagnet has an axially movable armature 14 , the inductance L of the electromagnet depends on the posi...

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Abstract

The present invention relates to a method of determining the positioning element position (x) of an electrically actuator, the actuator by means of a controlled switch (18) reaches the lower threshold of the threshold (i 1 ) when the threshold value is opened and the upper limit of the threshold value (i 2 ) is turned off, where according to the lower threshold of the threshold (i 1 ), upper threshold value (i 2 ) and according to the actuator electrical switching performance of the positioning element position (x), an ongoing duration period (t ein ) and a shutdown duration (t aus ), and locate the component position (x) by comparing the opening duration (t ein ) or shutdown duration (t aus and the opening duration (t ein ) and the shutdown duration (t aus ) of ( t ein +t aus ) and the opening duration (t ein ) and the shutdown duration (t aus ) of ( t ein +t aus Compared with the corresponding reference data stored to detect, the present invention further relates to a corresponding circuit (24) and a corresponding apparatus (12) for implementing this method, in particular a hydraulic valve 42.

Description

technical field [0001] The invention relates to a method for detecting the position of a positioning element of an electrically drivable actuator, as well as corresponding circuits and devices, in particular a hydraulic valve. Background technique [0002] Typical fields of application of this method are, for example, solenoid-operated valves or switches. The inductance of the electromagnet depends on the corresponding position of the armature. Therefore, the measurement of the inductance can detect the position of the armature in principle. [0003] DE4341797 discloses a method and a device for controlling electromagnetic appliances, which are mainly used in the field of fuel measurement in combustion engines. By actuating the magnetic valve, the start of injection, the end of injection and the resulting injected fuel quantity are determined. In doing so, it is required to know the time at which the armature of the magnetic valve reaches its end position. This switching...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F7/18F02D41/20G05B19/19
CPCF02D41/20F02D2041/2024F02D2041/2058G05B19/19G05B2219/41224H01F7/1844Y10T137/8242
Inventor 曲文明霍斯特·P.·曼尼贝克乔奇姆·莫斯克
Owner HYDAC ELECTRONICS GMBH
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