IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0102070
(2005-04-08)
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등록번호 |
US-8177520
(2012-05-15)
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발명자
/ 주소 |
- Mehlhorn, William Louis
- Phillips, Andrew William
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출원인 / 주소 |
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대리인 / 주소 |
Michael Best & Friedrich LLP
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인용정보 |
피인용 횟수 :
23 인용 특허 :
118 |
초록
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A method of controlling a motor operating a pumping apparatus of a fluid-pumping application. The pumping apparatus includes a pump having an inlet to receive a fluid and an outlet to exhaust the fluid, and the motor coupled to the pump to operate the pump. The method includes the acts of controllin
A method of controlling a motor operating a pumping apparatus of a fluid-pumping application. The pumping apparatus includes a pump having an inlet to receive a fluid and an outlet to exhaust the fluid, and the motor coupled to the pump to operate the pump. The method includes the acts of controlling the motor to operate the pump and monitoring the operation of the pump. The monitoring act includes monitoring a power of the motor, and determining whether the monitored power indicates an undesired flow of fluid through the pump. The method further includes the act of controlling the motor to cease operation of the pump when the determination indicates an undesired flow of fluid through the pump and zero or more other conditions exist.
대표청구항
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1. A method of detecting a possible entrapment event in a jetted-fluid system comprising a vessel for holding a fluid, a drain, a return, and a pumping apparatus coupled to the drain and the return, the pumping apparatus comprising a pump comprising an inlet coupled to the drain and an outlet couple
1. A method of detecting a possible entrapment event in a jetted-fluid system comprising a vessel for holding a fluid, a drain, a return, and a pumping apparatus coupled to the drain and the return, the pumping apparatus comprising a pump comprising an inlet coupled to the drain and an outlet coupled to the return, anda motor coupled to the pump to operate the pump, the method comprising: during a normal operation state, powering the motor,pumping the fluid with the pumping apparatus during the powering of the motor, the pumping act comprising suctioning the fluid from the vessel through the drain and jetting the pumped fluid into the vessel through the return,monitoring the drain for the possible entrapment event, the monitoring act comprising monitoring an input power of the motor, including sensing a voltage of the motor, sensing a current of the motor, determining a power factor of the motor, and calculating the input power to the motor based on the voltage, the current, and the power factor, andmonitoring the calculated input power for an indication of a possible entrapment event, andinitiating a fault state when the calculated input power is indicative of the possible entrapment event; andduring the fault state, powering down the motor, andceasing the pumping of the fluid after powering down the motor. 2. A method as set forth in claim 1 wherein the act of monitoring an input power comprises determining an averaged motor voltage based on the sensed voltage, determining an averaged motor current based on the sensed current, determining the power factor based on the sensed voltage and the sensed current, and determining the input power with the averaged motor voltage, the averaged motor current, and the motor power factor. 3. A method as set forth in claim 2 wherein the act of determining the power factor for the motor comprises sensing a first zero-crossing of the sensed voltage, sensing a second zero-crossing of the sensed current, and determining the power factor for the motor based on the sensed zero-crossings. 4. A method as set forth in claim 1 wherein the method further comprises calibrating the motor to obtain a power calibration value, and wherein the determining whether the monitored input power indicates the possible entrapment event comprises determining whether the monitored power is not within a window of the power calibration value, the window indicative of the pump operating normally. 5. A method as set forth in claim 1 wherein the determining whether the monitored input power indicates the possible entrapment event comprises determining whether the monitored power is less than a threshold indicative of the possible entrapment event. 6. A method as set forth in claim 1 wherein the method further comprises monitoring a pump inlet side pressure, determining whether the monitored pressure indicates the possible entrapment event. 7. A method as set forth in claim 1 and further comprising: during a first state, initiating operation of the motor,priming the pump after the initiating act,monitoring the operation of the pump, the monitoring act comprising monitoring the input power of the motor, anddetermining whether the monitored input power indicates the pump can be monitored for the possible entrapment event,ceasing the first state and entering the normal operation state based on the monitored input power indicating the pump can be monitored for the possible entrapment event. 8. A method as set forth in claim 1 further comprising monitoring at least one of the motor voltage, the motor current, and the input power to determine whether the motor is in an over-loaded condition. 9. A method as set forth in claim 8, further comprising comparing at least one of the motor voltage, the motor current, and the input power to a threshold value to determine whether the motor is in an over-loaded condition. 10. A method as set forth in claim 9, wherein the threshold value is indicative of the motor being improperly calibrated. 11. A method of detecting a possible entrapment event in a jetted-fluid system comprising a vessel for holding a fluid, a drain, a return, and a pumping apparatus coupled to the drain and the return, the pumping apparatus comprising a pump comprising an inlet coupled to the drain and an outlet coupled to the return,a motor coupled to the pump to operate the pump, the method comprising: during a first state, initiating operation of the motor,priming the pump after the initiating act,monitoring the operation of the pump, the monitoring act comprising monitoring a power of the motor, anddetermining whether the monitored power indicates the pump can be monitored for the possible entrapment event;ceasing the first state and entering a normal operation state based on the monitored power indicating the pump can be monitored for the possible entrapment event; andduring the normal operation state, pumping the fluid with the pumping apparatus during the powering of the motor, the pumping act comprising suctioning the fluid from the vessel through the drain and jetting the pumped fluid through the return andmonitoring the drain for the possible entrapment event, the monitoring act comprising monitoring the power of the motor. 12. A method as set forth in claim 11 wherein the acts of monitoring a power comprise sensing a voltage applied to the motor, determining an averaged motor voltage based on the sensed voltage, sensing a current through the motor, determining an averaged motor current based on the sensed current, determining a power factor for the motor based on the sensed voltage and the sensed current, and determining an input power with the averaged motor voltage, the averaged motor current, and the motor power factor. 13. A method as set forth in claim 12 wherein the act of determining a power factor for the motor comprises sensing a first zero-crossing of the sensed voltage, sensing a second zero-crossing of the sensed current, and determining the power factor for the motor based on the sensed zero-crossings. 14. A method as set forth in claim 11 wherein the method comprises calibrating the motor to obtain a power calibration value, wherein the determining whether the monitored input power indicates the pump can be monitored comprises determining whether the monitored power is within a window of the power calibration value, and wherein the ceasing act comprises ceasing the first state and entering a normal operation state based on the monitored power being within the window of the power calibration value for a time period. 15. A method as set forth in claim 11 wherein the determining whether the monitored input power indicates the pump can be monitored comprises determining whether the monitored power is greater than a threshold value, and wherein the ceasing act comprises ceasing the first state and entering a normal operation state based on the monitored power being greater than the threshold value for a time period. 16. A method as set forth in claim 15 wherein the time period is an instantaneous time period. 17. A method as set forth in claim 11 wherein the acts of monitoring a power comprise of the motor includes sensing a voltage of the motor, sensing a current of the motor, determining a power factor of the motor, and determining the power based on the voltage, the current, and the power factor. 18. A method of detecting a possible entrapment event in a jetted-fluid system comprising a vessel for holding a fluid, a drain, a return, and a pumping apparatus coupled to the drain and the return, the pumping apparatus comprising a pump comprising an inlet coupled to the drain and an outlet coupled to the return, anda motor coupled to the pump to operate the pump, the method comprising:pumping the fluid with the pumping apparatus, the pumping act comprising suctioning the fluid from the vessel through the drain and jetting the pumped fluid into the vessel through the return;during the pumping act, sensing a voltage of the motor, sensing a current of the motor, determining a power factor of the motor, and determining an input power based on the voltage, the current, and the power factor;determining whether a monitored input power indicates the possible entrapment event; andpowering down the motor based on the determining whether the monitored input power indicates the possible entrapment event. 19. A method as set forth in claim 18 further comprising determining an averaged motor voltage based on the sensed voltage, determining an averaged motor current based on the sensed current, determining the power factor based on the sensed voltage and the sensed current, and determining the input power with the averaged motor voltage, the averaged motor current, and the motor power factor. 20. A method as set forth in claim 19 wherein the act of determining the power factor for the motor comprises sensing a first zero-crossing of the sensed voltage, sensing a second zero-crossing of the sensed current, and determining the power factor for the motor based on the sensed zero-crossings. 21. A method as set forth in claim 18 wherein the method further comprises calibrating the motor to obtain a power calibration value, and wherein the determining whether the monitored input power indicates the possible entrapment event comprises determining whether the monitored power is not within a window of the power calibration value, the window indicative of the pump operating normally. 22. A method as set forth in claim 18 wherein the determining whether the monitored input power indicates the possible entrapment event comprises determining whether the monitored determined power is less than a threshold indicative of the possible entrapment event. 23. A method as set forth in claim 18 wherein the method further comprises determining whether the determined input power indicates the pump can be monitored for the possible entrapment event. 24. A method of detecting a possible entrapment event in a jetted-fluid system comprising a vessel for holding a fluid, a drain, a return, and a pumping apparatus coupled to the drain and the return, the pumping apparatus comprising a pump comprising an inlet coupled to the drain and an outlet coupled to the return,a motor coupled to the pump to operate the pump, the method comprising:initiating operation of the motor,priming the pump after the initiating act,monitoring the operation of the pump during the priming of the pump, the monitoring act comprising monitoring a power of the motor, anddetermining whether the monitored power indicates the system can be monitored for the possible entrapment event;entering a possible entrapment monitoring state based on the determining act; andmonitoring the system for the possible entrapment event after entering the possible entrapment monitoring state, the monitoring act comprising monitoring the power of the motor;wherein the acts of monitoring the power comprise sensing a voltage applied to the motor, sensing a current through the motor, determining a power factor for the motor, and determining an input power based on the voltage, the current, and the power factor. 25. A method as set forth in claim 24 further comprising determining an averaged motor voltage based on the sensed voltage, determining an averaged motor current based on the sensed current, determining the power factor based on the sensed voltage and the sensed current, and determining the input power with the averaged motor voltage, the averaged motor current, and the motor power factor.
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