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Method and circuit device for determining position of movable armature of electromagnetic actuator

A technology of electromagnetic actuator and circuit device, which is applied in the direction of fluid pressure actuation device, valve operation/release device, circuit, etc., to achieve the effects of improving temperature characteristic curve, interference robustness, and cost saving

Active Publication Date: 2018-05-01
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Both amplifier types have inherently noisy

Method used

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  • Method and circuit device for determining position of movable armature of electromagnetic actuator
  • Method and circuit device for determining position of movable armature of electromagnetic actuator
  • Method and circuit device for determining position of movable armature of electromagnetic actuator

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Embodiment Construction

[0031] exist figure 1 A solenoid valve 101 is schematically shown in FIG. 1 , in which the method according to the invention can be carried out. Solenoid valve 101 , which is presently designed as a proportional valve, has a solenoid actuator 101 , which in turn has a coil 102 and an armature 103 movable in this coil.

[0032] Connected to the armature 103 is a control slide valve 104 which can be moved back and forth in a valve housing 106 . The control spool 104 is supported at the end of the valve housing 106 by means of a spring 105 . The armature 103 is moved by controlling the electromagnetic actuator 101 and thus the spool 104 presses against the spring 105 . In this way, the position x of the armature 103 or of the slide valve 104 can be changed. For this purpose, the coil 102 can be controlled, for example (via terminals not shown here) by pulse width modulation.

[0033] Flow from port A to port B through valve housing 106 is regulated by movement of spool valve ...

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PUM

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Abstract

The invention relates to a method for determining a position of a movable armature (103) of an electromagnetic actuator (101), wherein the armature by means of energization of a coil (102) of the electromagnetic actuator (101) is movable, wherein a semiconductor switch (M1), a current sense resistor circuit (RS) and the coil (102) are connected in series, wherein the position (x) of the armature (103) is determined taking into account a frequency of a vibrating signal in a vibratory electrical system, wherein the coil (102) as a frequency-influencing element of the oscillatory electrical system is used, wherein a potential at a node between the coil (102) and the current sense resistor circuit (RS) is controlled by means of the semiconductor switch (M1) to a desired value.

Description

technical field [0001] The invention relates to a method and a circuit arrangement for determining the position of an armature of an electromagnetic actuator which can be moved by controlling a coil of the electromagnetic actuator. Background technique [0002] Electromagnetic actuators are known which have an armature and a coil, wherein the armature can be moved by energizing the coil. Such solenoid actuators are often used in solenoid valves, for example for hydraulic applications. In this case, such a solenoid valve can be used as a proportional valve by, for example, controlling the coil in a pulse-width modulated manner. Here, an average current occurs in the coil due to the inductance. As a counter force to the magnetic force, a spring can be provided here, however, for example, other coils are also conceivable. [0003] However, the actual position of the armature and thus, for example, of the control slide connected to the armature often does not correspond to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F7/16H01F7/18F16K31/06
CPCF16K31/0668F16K31/0675H01F7/1607H01F7/1844H01F2007/185F16K37/0041H01F7/16H01F7/18F15B13/0442F15B2013/0409
Inventor T.基尔希纳
Owner ROBERT BOSCH GMBH
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