Operator coil parameter based electromagnetic switching
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IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01H-047/32
H01H-047/22
H01H-050/22
H01H-050/54
H01H-051/06
출원번호
US-0832666
(2015-08-21)
등록번호
US-10074497
(2018-09-11)
발명자
/ 주소
Bock, Christopher H.
Wieloch, Christopher J.
Kinsella, James J.
Dziekonski, Stefan T.
출원인 / 주소
Rockwell Automation Technologies, Inc.
대리인 / 주소
Fletcher Yoder, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
61
초록▼
One embodiment describes an operating coil driver circuitry, which includes a control circuitry that outputs a trigger signal and a reference voltage; an operational amplifier that compares the reference voltage to a node voltage, in which the node voltage is directly related to current flowing thro
One embodiment describes an operating coil driver circuitry, which includes a control circuitry that outputs a trigger signal and a reference voltage; an operational amplifier that compares the reference voltage to a node voltage, in which the node voltage is directly related to current flowing through an operating coil of a switching device and the operational amplifier outputs a logic high signal when the node voltage is higher than the reference voltage and outputs a logic low signal when the node voltage is lower than the reference voltage; and a flip-flop that outputs a pulse-width modulated signal to instruct a switch to supply a desired current to the operating coil based at least in part on the trigger signal and the signal output by the operational amplifier.
대표청구항▼
1. An operating coil driver circuitry comprising: a control circuitry configured to output a trigger signal and a reference voltage;an operational amplifier configured to compare the reference voltage to a node voltage, wherein the node voltage is directly related to current flowing through an opera
1. An operating coil driver circuitry comprising: a control circuitry configured to output a trigger signal and a reference voltage;an operational amplifier configured to compare the reference voltage to a node voltage, wherein the node voltage is directly related to current flowing through an operating coil of a switching device and the operational amplifier is configured to output a logic high signal when the node voltage is higher than the reference voltage and to output a logic low signal when the node voltage is lower than the reference voltage; anda flip-flop configured to output a pulse-width modulated signal to instruct a switch to supply a desired current to the operating coil based at least in part on the trigger signal and the signal output by the operational amplifier;wherein the coil controls a switching device, and wherein the control circuitry, in operation, determines a duty cycle of the pulse-width modulated signal and controls future making and breaking of the switching device based upon when the switching device makes and breaks based on the determined duty cycle. 2. The operating coil driver circuitry of claim 1, wherein the pulse-width modulated signal is a logic high when the operational amplifier outputs a logic low signal and the trigger signal is a logic high and the pulse-width module signal is a logic low when the trigger signal is a logic low and the operational amplifier outputs a logic high signal. 3. The operating coil driver circuitry of claim 1, wherein the flip-flop is configured to instruct the switch to increase the current supplied to the operating coil when the pulse-width modulated signal is a logic high and to instruct the switch to decrease the current supplied to the operating coil when the pulse-width modulated signal is a logic low. 4. The operating coil driver circuitry of claim 1, wherein the switching is configured to connect the operating coil to a DC bus when the pulse-width modulated signal is a logic high and to disconnect the operating from the DC bus when the pulse-width modulated signal is a logic low. 5. The operating coil driver circuitry of claim 1, wherein the flip-flop is an SR flip-flop. 6. The operating coil driver circuitry of claim 1, wherein the switching device is a single pole, single current carrying path switching device. 7. The operating coil driver circuitry of claim 1, wherein the flip-flop is configured to output the pulse-width modulated signal such that the switching device makes or breaks based at least in part on a current-zero-crossing or a predicted current zero-crossing. 8. A method comprising: instructing, using a pulse-width modulated signal, a switch to supply a pull-in current to an operating coil of a switching device to make the switching device;determining, using a control circuitry, duration duty cycle of the pulse-width modulated signal is at a maximum determined value; anddetermining, using the control circuitry, when the switching device makes based at least in part on the duration the duty cycle is at the maximum determined value, wherein when the switching device makes is used to control future make operations of the switching device. 9. The method of claim 8, wherein determining when the switching device makes comprises: using a look-up table, wherein the look-up table correlates various durations the duty cycle is at the maximum determined value to when the switching device makes;using a model that describes a relationship between the various durations the duty cycle is at the maximum determined value and when the switching device makes; orsome combination thereof. 10. The method of claim 8, wherein the maximum determined value is 100%. 11. The method of claim 8, wherein the future make operations of the switching device are controlled by determining an expected make time of the switching deice. 12. The method of claim 11, wherein determining the expected make time comprises updating an expected make time look-up table with the duration the duty cycle is at the maximum determined value. 13. The method of claim 11, wherein the expected make time is used to make the switching device based at least in part a predicted current zero-crossing. 14. The method of claim 8, wherein instructing the switch to supply the pull-in current to the operating coil comprises making the switching device ahead of a predicted current zero-crossing. 15. The method of claim 8, wherein determining when the switching device makes comprises determining whether the switching device makes at or before a predicted current zero-crossing. 16. A method comprising: instructing, using a pulse-width modulated signal, a switch to supply a break current to an operating coil of a switching device to break the switching device;determining, using a control circuitry, when duty cycle of the pulse-width modulated signal is at a minimum determined value;subsequently, determining, using the control circuitry, duration the duty cycle of the pulse-width modulated signal goes above the minimum determined value; anddetermining, using the control circuitry, when the switching device breaks based at least in part on the duration the duty cycle is above the minimum determined value after reaching the minimum determined value, wherein when the switching device breaks is used to control future break operations of the switching device. 17. The method of claim 16, wherein determining when the switching device breaks comprises using a look-up table, wherein the look-up table correlates various durations the duty cycle is above the minimum determined value to when the switching device breaks. 18. The method of claim 16, wherein the minimum determined value is 0%. 19. The method of claim 16, wherein the minimum determined value is equal to duty cycle of a trigger signal used to generate the pulse-width modulated signal. 20. The method of claim 16, wherein the future break operations of the switching device are controlled by determining an expected break time of the switching deice. 21. The method of claim 20, wherein determining the expected break time comprises updating an expected break time look-up table with the duration the duty cycle is above the minimum determined value. 22. The method of claim 20, wherein the expected break time is used to break the switching device ahead of a current zero-crossing during future break operations. 23. The method of claim 16, wherein instructing the switch to supply the break current to the operating coil comprises breaking the switching device ahead of a current zero-crossing. 24. The method of claim 16, wherein determining when the switching device breaks comprises determining whether the switching device breaks at or before a current zero-crossing. 25. A tangible, non-transitory, computer readable medium storing instructions executable by a processor of a control circuitry, wherein the instructions comprises instructions to: instruct a switching to supply a break current to an operating coil of a switching device to break the switching device;receive an output from an operational amplifier based on a comparison between a reference voltage and a node voltage, wherein the node voltage is directly related to current flowing through the operating coil, wherein a logic high signal is output when the node voltage is higher than the reference voltage and a logic low signal is output when the node voltage is lower than the reference voltage;determine when the output signal goes from a logic high to a logic low;subsequently, determine duration the output signal goes back to and stays at a logic high; anddetermine when the switching device breaks based at least in part on the duration the output signal stays at the logic high, wherein when the switching device breaks is used to control future break operations of the switching device. 26. The computer-readable medium of claim 25, wherein the break current is zero. 27. The computer-readable medium of claim 25, wherein the instructions comprises instructions to control the future break operations of the switching device by determining an expected break time of the switching deice. 28. The computer-readable medium of claim 27, wherein the instructions to determine the expected break time comprises instructions to update an expected break time look-up table with the duration the output signal is at a logic high.
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