System and method with timing self-configuration

Patent metadata

Field	Value
Publication number	US-9570253-B1
Application number	US-201113305286-A
Country	US
Kind code	B1
Filing date	Nov 28, 2011
Priority date	Nov 28, 2011
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

A method of operating an automatic transfer switch to switch an electrical load from one power source to another power source includes measuring one or more characteristics of a switching circuit in the automatic transfer switch. A value of one or more timing variables is determined based on the measured characteristics of the switching circuit. The switching circuit is operated to close relays in the automatic transfer switch. The timing of closing of the relays is based on the value of the timing variables.

First claim

What is claimed is:

1. A method of operating an automatic transfer switch to switch an electrical load from one power source to another power source, comprising:
measuring one or more characteristics of a switching circuit in the automatic transfer switch;
determining a value of one or more delays for the switching circuit, wherein the one or more delays comprise a delay between a control event and a closing of one or more relays of the automatic transfer switch, wherein the one or more delays are determined based, at least in part, on at least one of the measured characteristics of the switching circuit;
providing electrical power to the electrical load via the automatic transfer switch;
subsequently measuring at least one of the one or more characteristics of the switching circuit in the automatic transfer switch while electrical power is being provided to the electrical load via the automatic transfer switch;
adjusting the value of at least one of the one or more delays based, at least in part, on the at least one characteristic of the switching circuit measured while electrical power is being provided to the electrical load; and
operating the switching circuit to close one or more of the relays in the automatic transfer switch, wherein the timing of the closing of at least one of the relays is based, at least in part, on the adjusted value of the at least one delay.

2. The method of claim 1 , wherein the control event comprises an instruction executed in a controller of the automatic transfer switch.

3. The method of claim 1 , wherein operating the switching circuit to close the one or more relays comprises operating the switching circuit such that closing of the at least one relay occurs within a predetermined time range relative to a zero crossing of a secondary power input to the automatic transfer switch.

4. The method of claim 1 , wherein the measuring of the value of the one or more characteristics and the determining of the value of the one or more delays are performed during a self-configuration of the automatic transfer switch when the automatic transfer switch is placed into service, the method further comprising storing the at least one delay in a memory in the automatic transfer switch.

5. The method of claim 1 , wherein measuring the one or more characteristics of the switching circuit comprises measuring one or more characteristics that vary based on manufacturing of one or more relays in the switching circuit.

6. The method of claim 1 , wherein subsequently measuring the at least one of the one or more characteristics of the switching circuit comprises measuring one or more characteristics that vary based on the environmental conditions for the switching circuit.

7. The method of claim 1 , wherein measuring the one or more characteristics of the switching circuit comprises measuring one or more characteristics that vary based on software used to control the switching circuit.

8. A method of operating a system having one or more electromechanical devices, comprising:
performing, by the system, a self-configuration, wherein performing the self-configuration comprises:
measuring, by the system, one or more characteristics of an electromechanical circuit in the system; and
determining, by the system, a value of one or more delays for the electromechanical circuit, wherein the one or more delays comprise a delay between a control event and operation of one or more of the electromechanical devices, wherein the one or more delays are determined based, at least in part, on at least one of the measured characteristics of the electromechanical circuit;

placing the system into operation;
subsequently measuring at least one of the one or more characteristics of the electromechanical circuit while the system is in operation;
adjusting the value of at least one of the one or more delays based, at least in part, on the at least one characteristic of the electromechanical circuit measured while the system is in operation; and
operating the electromechanical circuit, wherein operating the electromechanical circuit comprises controlling at least one of the electromechanical devices, wherein the timing of at least one operation of the at least one electromechanical device is based, at least in part, on the adjusted value of the at least one delay.

9. The method of claim 8 , wherein the control event comprises an instruction executed in a controller of the system.

10. The method of claim 8 , wherein operating the electromechanical circuit comprises operating the electromechanical circuit such that at least one action in the at least one electromechanical device occurs within a predetermined time range relative to one or more events.

11. The method of claim 8 , wherein operating the electromechanical circuit comprises operating the electromechanical circuit such that at least one action in the electromechanical device occurs within a predetermined time range relative to a waveform of an electrical input, electrical output, or electrical signal.

12. The method of claim 8 , wherein the self-configuration is performed when the system is placed into service, further comprising storing the at least one delay in a memory in the system.

13. The method of claim 8 , wherein the self-configuration is performed after the system has been placed into service, wherein determining of the value of the at least one delay comprises adjusting the value of the delay based on at least one change in a value of at least one of the measured characteristics.

14. The method of claim 8 , wherein measuring the one or more characteristics of the electromechanical circuit comprises measuring one or more characteristics that vary based on manufacturing of at least one of the electromechanical devices in the electromechanical circuit.

15. The method of claim 8 , wherein measuring the one or more characteristics of the electromechanical circuit comprises measuring one or more characteristics that vary based on a batch of at least one of the electromechanical devices in the electromechanical circuit.

16. The method of claim 8 , wherein measuring the one or more characteristics of the electromechanical circuit comprises measuring one or more characteristics that vary based on a source of supply of at least one of the electromechanical devices in the electromechanical circuit.

17. The method of claim 8 , wherein subsequently measuring the at least one of the one or more characteristics of the electromechanical circuit comprises measuring one or more characteristics that vary based on the environmental conditions for the electromechanical circuit.

18. The method of claim 8 , wherein measuring the one or more characteristics of the electromechanical circuit comprises measuring one or more characteristics that vary based on software used to control the electromechanical circuit.

19. The method of claim 18 , further comprising disabling the system if at least one of the measurements during self-configuration fails to fall within a predetermined acceptable range.

20. The method of claim 18 , further comprising sending an alarm if at least one of the measurements during self-configuration fails to fall within a predetermined acceptable range.

21. A system, comprising:
at least one processor; and
a memory comprising program instructions, wherein the program instructions are executable by the at least one processor to implement:
performing a self-configuration of the system, wherein performing the self-configuration of the system compris

Assignees

• Hamilton James R
• Amazon Tech Inc

Inventors

• Hamilton James R

Classifications

• H01H2300/018

  Application transfer; between utility and emergency power supply · CPC title

• H01H71/44

  having means for introducing a predetermined time delay (by short-circuited winding H01H71/30; by additional armature H01H71/34) · CPC title

• H01H71/125

  characterised by sensing elements, e.g. current transformers (for differential protection H01H83/144) · CPC title

• H01H11/0062 Primary

  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

• H01H9/56 Primary

  for ensuring operation of the switch at a predetermined point in the AC cycle · CPC title