Lifting armature actuator

Patent metadata

Field	Value
Publication number	US-9524818-B2
Application number	US-201213433344-A
Country	US
Kind code	B2
Filing date	Mar 29, 2012
Priority date	Mar 30, 2011
Publication date	Dec 20, 2016
Grant date	Dec 20, 2016

Abstract

An electromagnetic lifting armature actuator, in particular for valves, comprises an armature rod which can be shifted in the direction of its longitudinal axis, and a magnetic yoke comprising a first yoke leg and a second yoke leg which is coaxial to the armature rod. A first magnet coil encloses the first yoke leg and a second magnet coil encloses both the second yoke leg and the armature rod. One of the magnet coils is a working and measuring coil which can be selectively used for enhancing the magnetic force or for determining a position of the movable armature rod.

First claim

The invention claimed is:

1. An electromagnetic lifting armature actuator, in particular for valves, comprising an armature rod which can be shifted in a direction of a longitudinal axis; a magnetic yoke comprising a first yoke leg and a second yoke leg which is coaxial to the armature rod; a first magnet coil enclosing the first yoke leg and a second magnet coil enclosing both the second yoke leg and the armature rod; a transverse web provided with an opening, and wherein the armature rod projects through the opening of the transverse web; and wherein one of the first and second magnet coils is a working and measuring coil which is selectively used for enhancing a magnetic force when operating under a first condition and is selectively used for determining a position of the armature rod when operating under a second condition, and wherein when operating under the first condition a first type of voltage is applied to the working and measuring coil, and when operating under the second condition a second type of voltage is applied to the working and measuring coil that is different than the first type of voltage.

2. The lifting armature actuator according to claim 1 , wherein the first and second yoke legs are aligned to be parallel and spaced from each other.

3. The lifting armature actuator according to claim 1 , wherein the transverse web is engaged by the first yoke leg and by the second yoke leg.

4. The lifting armature actuator according to claim 3 , wherein the transverse web comprises two parallel transverse webs spaced from each other, the first yoke leg connecting the two transverse webs and extending perpendicularly to the transverse webs, and wherein the second yoke leg is spaced from the first yoke leg and extends perpendicularly to the transverse webs, and wherein the armature rod is guided to be axially movable and to project through one of the transverse webs and defines an air gap together with the second yoke leg.

5. The lifting armature actuator according to claim 1 , wherein the first magnet coil is the working and measuring coil and the second magnet coil is a working coil.

6. The lifting armature actuator according to claim 1 , wherein the first and second magnet coils are of identical construction.

7. The lifting armature actuator according to claim 1 , wherein the first and second magnet coils are each connected to a control device via an electrical connector, and wherein a precision resistor and a voltmeter or ammeter is provided on the electrical connector of the working and measuring coil.

8. The lifting armature actuator according to claim 1 , wherein an electrical control device is provided which applies a DC voltage to the working and measuring coil while functioning as a working coil and applies a square wave voltage to the working and measuring coil while functioning as a measuring coil.

9. The lifting armature actuator according to claim 1 , wherein the first type of voltage comprises a DC voltage and wherein the second type of voltage comprises a square wave voltage.

10. The lifting armature actuator according to claim 9 , including a control device that is connected to each of the first and second magnet coils via at least one connector, and wherein the control device applies the DC voltage to the working and measuring coil while functioning as the working coil and applies the square wave voltage to the working and measuring coil while functioning as the measuring coil.

11. The lifting armature actuator according to claim 10 , including a precision resistor and a voltmeter or ammeter associated with the at least one connector.

12. A valve, in particular a miniaturized magnet valve, comprising: a lifting armature actuator comprising; an armature rod which can be shifted in a direction of a longitudinal axis; a magnetic yoke comprising a first yoke leg and a second yoke leg which is coaxial to the armature rod; a first magnet coil enclosing the first yoke leg and a second magnet coil enclosing both the second yoke leg and the armature rod; a transverse web provided with an opening, and wherein the armature rod projects through the opening of the transverse web; wherein one of the first and second magnet coils is a working and measuring coil which is selectively used for enhancing a magnetic force when operating under a first condition and is selectively used for determining a position of the armature rod when operating under a second condition, wherein when operating under the first condition a first type of voltage is applied to the working and measuring coil, and when operating under the second condition a second type of voltage is applied to the working and measuring coil that is different than the first type of voltage; and wherein the armature rod has an outer axial end face provided with a sealing body which cooperates with a sealing seat of the valve.

13. The valve according to claim 12 , wherein without a separation of media between the lifting armature actuator and fluid side, the components of the magnetic yoke which are in contact with fluid are comprised of a corrosion-resistant material.

14. The valve according to claim 13 , wherein the components of the magnetic yoke which are in contact with fluid are realized with larger physical dimensions compared to a design made of a material with high saturation magnetization.

15. The valve according to claim 12 , wherein the first type of voltage comprises a DC voltage and wherein the second type of voltage comprises a square wave voltage.

16. The valve according to claim 15 including a control device that is connected to each of the first and second magnet coils via at least one connector, and wherein the control device applies the DC voltage to the working and measuring coil while functioning as the working coil and applies the square wave voltage to the working and measuring coil while functioning as the measuring coil.

Assignees

• Kahl Sebastian
• Ottliczky Martin
• Buerkert Werke Gmbh

Inventors

• Kahl Sebastian
• Ottliczky Martin

Classifications

• H01F7/08 Primary

  with armatures · CPC title

• H01F2007/185

  with armature position measurement · CPC title

• H01F7/1844

  Monitoring or fail-safe circuits (for relays H01H47/002) · CPC title

• H01F7/123

  by ancillary coil · CPC title

• H01F7/1607

  Armatures entering the winding · CPC title