Systems and methods for controlling firing delay in multi-phase relay devices

Patent metadata

Field	Value
Publication number	US-11380503-B2
Application number	US-201916588278-A
Country	US
Kind code	B2
Filing date	Sep 30, 2019
Priority date	Sep 30, 2019
Publication date	Jul 5, 2022
Grant date	Jul 5, 2022

Abstract

A control system may include a processor that may receive a first dataset associated with a current received at a load device coupled to a relay device. The processor may also determine harmonics data associated with the current and determine a switching profile to control moving a first armature of three armatures in the relay device based on the harmonics data. The switching profile is configured to control movement of the first armature between a first position and a second position, and wherein the switching profile comprises a firing angle for moving the first armature with respect to an electrical waveform, a second armature, and a third armature. The processor may then control a current provided to a relay coil of the relay device based on the switching profile, such that the relay coil causes the first armature to move.

First claim

The invention claimed is:

1. A system, comprising:
a switch 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 a first dataset associated with a current received at a load device coupled to the switch device;
determine harmonic data based on the current;
determine a switching profile to control moving the armature between the first position and the second position based on the harmonic data, wherein the switching profile comprises a firing angle for moving the armature with respect to an electrical waveform;
incrementally adjust the switching profile to identify a beta delay that reduces harmonics present on the load device; and
control the voltage provided to the coil based on the adjusted switching profile.

2. The system of claim 1 , wherein the switch device comprises:
a second armature configured to move between a third position that electrically couples a third contact to a fourth contact and a fourth position that electrically uncouples the third contact from the fourth contact; and
a third armature configured to move between a fifth position that electrically couples a fifth contact to a sixth contact and a sixth position that electrically uncouples the fifth contact from the sixth contact, wherein the switching profile is configured to cause the second armature and the third armature to move before the armature.

3. The system of claim 1 , wherein the first dataset is received from a sensor.

4. The system of claim 1 , wherein the control system is configured to determine the harmonic data based on a resonance frequency of the current.

5. The system of claim 1 , wherein the control system is configured to receive the first dataset by cycling power to the load device and receiving the first dataset from a sensor.

6. The system of claim 1 , wherein the control system is configured to adjust the switching profile to achieve lower harmonics for the load device.

7. The system of claim 1 , wherein the control system is configured to:
receive a second dataset indicative of a magnetic core being part of the load device; and
adjust the switching profile based on the second dataset.

8. The system of claim 1 , wherein the control system is configured to:
receive a second dataset indicative of a request to soft start the load device; and
adjust the switching profile based on the second dataset.

9. The system of claim 1 , wherein the control system is configured to incrementally adjust the switching profile after cycling power to the load device.

10. A control system, comprising a processor configured to:
receive a first dataset associated with a current received at a load device coupled to a switch device;
determine harmonics data associated with the current;
determine a switching profile to control moving a first armature of three armatures in the switch device based on the harmonics data, wherein the switching profile is configured to control movement of the first armature between a first position and a second position, and wherein the switching profile comprises a firing angle for moving the first armature with respect to an electrical waveform, a second armature, and a third armature;
receive a second dataset indicative of a magnetic core being part of the load device; and
adjust the switching profile based on the second dataset; and
control a current provided to a coil of the switch device based on the adjusted switching profile, wherein the coil is configured to cause the first armature to move.

11. The control system of claim 10 , wherein the processor is configured to:
receive a third dataset indicative of a request to soft start the load device; and
adjust the switching profile based on the third dataset.

12. The control system of claim 10 , wherein:
the second armature is configured to move between a third position that electrically couples a third contact to a fourth contact and a fourth position that electrically uncouples the third contact from the fourth contact; and
the third armature is configured to move between a fifth position that electrically couples a fifth contact to a sixth contact and a sixth position that electrically uncouples the fifth contact from the sixth contact, wherein the switching profile is configured to cause the second armature and the third armature to move before the first armature.

13. The control system of claim 10 , wherein the first dataset is received from a sensor.

14. The control system of claim 10 , wherein the processor is configured to receive the first dataset by cycling power to the load device and receiving the first dataset from a sensor.

15. The control system of claim 10 , wherein the processor is configured to adjust the switching profile by adjusting a beta delay associated with the switch device.

16. A method, comprising:
receiving, via a processor, a first dataset associated with a current received at a load device coupled to a switch device;
determining, via the processor, harmonics data associated with the current;
receiving, via the processor, a second dataset associated with one or more operations of the load device over a period of time;
determining, via the processor, a switching profile to control moving a first armature of three armatures in the switch device based on the harmonics data, wherein the switching profile is configured to control movement of the first armature between a first position and a second position, and wherein the switching profile comprises a firing angle for moving the first armature with respect to an electrical waveform, a second armature, and a third armature;
incrementally adjusting the switching profile to identify a beta delay that reduces harmonics present on the load device; and
controlling, via the processor, a current provided to a coil of the switch device based on the adjusted switching profile, wherein the coil is configured to cause the first armature to move.

17. The method of claim 16 , comprising:
receiving, via the processor, a third dataset indicative of a magnetic core being part of the load device; and
adjusting, via the processor, the switching profile based on the third dataset.

18. The method of claim 16 , comprising:
receiving a third dataset indicative of a request to soft start the load device; and
adjusting the switching profile based on the third dataset.

19. The method of claim 16 , wherein the first dataset is received via a current sensor.

20. The method of claim 16 , wherein the switching profile is adjusted to achieve lower harmonics for the load device.

Assignees

• Rockwell Automation Tech Inc

Inventors

• Omari Ahmad K
• Jaap Andrew J
• Langer Randall S

Classifications

• H01H50/54

  Contact arrangements · CPC title

• H01H50/44

  Magnetic coils or windings · CPC title

• H02P1/24

  for starting an individual AC commutator motor (starting of AC/DC commutator motors H02P1/18) · CPC title

• H01H50/002 Primary

  particular to three-phase electromagnetic relays (synchronous switching H01H9/563) · CPC title

• H02P1/10

  Manually-operated on/off switch controlling relays or contactors operating sequentially for starting a motor · CPC title