Systems and methods for controlling a position of contacts in a relay device

Patent metadata

Field	Value
Publication number	US-11417482-B2
Application number	US-201916588180-A
Country	US
Kind code	B2
Filing date	Sep 30, 2019
Priority date	Sep 30, 2019
Publication date	Aug 16, 2022
Grant date	Aug 16, 2022

Abstract

A system may include a relay device. The relay device may include an armature that moves between a first position that electrically couples a first contact to a second contact and a second position that electrically uncouples the first contact from the second contact. The relay device may also include a relay coil that receives a voltage configured to magnetize a relay coil, thereby causing the armature to move from the first position to the second position. The system also includes a control system that receives an indication that the armature is in the second position and sends a signal to an actuator in response to receiving the indication. The signal causes an arm associated with the actuator to move the armature to achieve a gap distance between the first contact and the second contact.

First claim

The invention claimed is:

1. A system, comprising:
a single-pole switching device, comprising:
an armature configured to move between a first position that electrically couples a first contact to a second contact and a second position that electrically uncouples the first contact from the second contact;
a coil is configured to receive a voltage configured to magnetize the coil, thereby causing the armature to move from the first position to the second position; and
a control system configured to:
receive an indication that the armature is in the second position; and
send a signal to an actuator in response to receiving the indication, wherein the signal is configured to cause an arm associated with the actuator to move the armature to achieve a gap distance between the first contact and the second contact, wherein the gap distance corresponds to a distance between the first contact and the second contact that prevents a restrike from occurring after the armature moves from the first position to the second position.

2. The system of claim 1 , wherein the actuator comprises a stepper motor.

3. The system of claim 2 , wherein the distance between the first contact and the second contact corresponds to a number of increments in the stepper motor.

4. The system of claim 1 , wherein the indication is indicative of the armature moving from the first position to the second position.

5. The system of claim 1 , wherein the gap distance is determined based on one or more electrical properties associated with the first contact and the second contact.

6. The system of claim 5 , wherein the one or more electrical properties comprise a current, a voltage, or both.

7. The system of claim 1 , wherein the arm is coupled to the armature.

8. The system of claim 1 , wherein the gap distance is determined based on a material of the first contact and the second contact, an inductance of the coil, or both.

9. A control system, comprising a processor configured to:
receive an indication that an armature is in a first position, wherein the armature is configured to move a first contact between the first position that electrically uncouples the first contact from a second contact and a second position that electrically couples the first contact to the second contact;
determine a gap distance between the first contact and the second contact while the armature is in the first position, wherein the gap distance is determined based on a relationship between one or more gap distances between the first contact and the second contact and one or more respective expected number of bounces between the first contact and the second contact; and
send a signal to an actuator, wherein the signal is configured to cause an arm associated with the actuator to move the armature to achieve the gap distance between the first contact and the second contact.

10. The control system of claim 9 , wherein the indication is indicative of the armature remaining in the first position until a close operation is performed.

11. The control system of claim 9 , wherein the gap distance is associated with minimizing an amount of bounces between the first contact and the second contact after a close operation is performed.

12. The control system of claim 9 , wherein the gap distance corresponds to a distance between the first contact and the second contact that prevents a restrike from occurring after the armature moves from the second position to the first position.

13. The control system of claim 9 , wherein the arm is coupled to the armature.

14. The control system of claim 9 , wherein the actuator comprises a stepper motor.

15. A method, comprising:
receiving, via a processor, a first indication that an armature is in a first position, wherein the armature is configured to move a first contact between the first position that electrically uncouples the first contact from a second contact and a second position that electrically couples the first contact to the second contact;
determining, via the processor, a first gap distance between the first contact and the second contact while the armature is in the first position, wherein the first gap distance is determined based on a relationship between one or more gap distances between the first contact and the second contact and one or more respective expected number of bounces between the first contact and the second contact;
determining, via the processor, a second gap distance between the first contact and the second contact, wherein the second gap distance corresponds to a distance between the first contact and the second contact that prevents a restrike from occurring after the armature moves from the second position to the first position; and
sending, via the processor, a signal to an actuator, wherein the signal is configured to cause an arm associated with the actuator to move the armature to achieve a third gap distance between the first contact and the second contact, wherein the third gap distance is between the first gap distance and the second gap distance.

16. The method of claim 15 , wherein the arm is coupled to the armature.

17. The method of claim 15 , wherein the actuator comprises a stepper motor.

18. The method of claim 15 , wherein the second gap distance is determined based on one or more electrical properties associated with the first contact and the second contact.

19. The method of claim 18 , wherein the one or more electrical properties comprise a current, a voltage, or both.

20. The method of claim 15 , wherein the signal is determined based on an inductance of the actuator.

Assignees

• Rockwell Automation Tech Inc

Inventors

• Elmiger David
• Duffy Patrick K
• Adkins Kyle B

Classifications

• H01H50/34

  Means for adjusting limits of movement; Mechanical means for adjusting returning force · CPC title

• H01H50/305 Primary

  damping vibration due to functional movement of armature (in air-gap H01H50/163) · CPC title

• H01H47/02 Primary

  for modifying the operation of the relay · CPC title

• H01H50/18

  Movable parts of magnetic circuits, e.g. armature · CPC title

• H01H11/0062

  Testing or measuring non-electrical properties of switches, e.g. contact velocity (monitoring contacts H01H1/0015; monitoring gas density H01H33/563; monitoring vacuum H01H33/668; calibrating H01H69/01; adjusting H01H71/74; testing of electrical properties G01R31/333) · CPC title