IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0506349
(2009-07-21)
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등록번호 |
US-8282361
(2012-10-09)
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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 :
0 인용 특허 :
121 |
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 pumping apparatus for a jetted-fluid system comprising a vessel for holding a fluid, a drain, and a return, the pumping apparatus being connectable to a power source and comprising: a pump comprising an inlet connectable to the drain, and an outlet connectable to the return, the pump adapted to
1. A pumping apparatus for a jetted-fluid system comprising a vessel for holding a fluid, a drain, and a return, the pumping apparatus being connectable to a power source and comprising: a pump comprising an inlet connectable to the drain, and an outlet connectable to the return, the pump adapted to receive the fluid from the drain and jet fluid through the return;a motor coupled to the pump to operate the pump, the motor configured to operate at a first speed and at least one second speed;a current sensor coupled to the motor and configured to generate a first signal having a relation to a current applied to the pump motor;a switch connectable to the power source, coupled to the motor, and configured to control the current through the motor;a controller coupled to the current sensor and the switch, the controller configured to determine a voltage having a relation to the motor and generate a value to control the motor based on the first signal, the determined voltage, and a phase angle between the first signal and the determined voltage, the value having a relation to a motor power value, the controller further configured to monitor the value, determine whether the monitored value indicates an undesired flow of fluid through the pump, and control the motor to cease operation of the pump based on the determination indicating the undesired flow of fluid through the pump; anda first circuitry coupled to the current sensor and to the controller, the first circuitry configured to receive the first signal and produce a second signal representing an averaged value for the first signal. 2. A pumping apparatus as set forth in claim 1 wherein the determination whether the monitored value indicates the undesired flow of fluid comprises the controller being further configured to determine whether the monitored value indicates an undesired low fluid inlet flow, and wherein the control of the motor to cease operation of the pump when the determination indicates the undesired flow of fluid comprises the controller being further configured to control the motor to cease operation of the pump based on the determination indicating the undesired low fluid inlet flow. 3. A pumping apparatus as set forth in claim 1 wherein the determination whether the monitored value indicates the undesired flow of fluid comprises the controller being further configured to determine whether the monitored value indicates an undesired high fluid outlet flow, and wherein the control of the motor to cease operation of the pump when the determination indicates the undesired flow of fluid comprises the controller being further configured to control the motor to cease operation of the pump based on the determination indicating the undesired high fluid outlet flow. 4. A pumping apparatus as set forth in claim 1 wherein the controller comprises a memory configurable to store a calibration value, and wherein the determination whether the monitored value indicates the undesired flow of fluid comprises the controller being further configured to determine whether the monitored value is not within a window of the calibration value, the window indicative of a desired flow of fluid through the pump. 5. A pumping apparatus as set forth in claim 1 wherein the controller comprises a memory configurable to store a threshold indicative of an undesired low fluid inlet flow, and wherein the determination whether the monitored value indicates the undesired flow of fluid comprises the controller being further configured to determine whether the monitored value is less than the threshold. 6. A pumping apparatus as set forth in claim 1 wherein the controller comprises a memory configurable to store a threshold indicative of an undesired high fluid outlet flow, and wherein the determination whether the monitored value indicates the undesired flow of fluid comprises the controller being further configured to determine whether the monitored value is greater than the threshold. 7. A pumping apparatus as set forth in claim 1 wherein the pumping apparatus further comprises a pressure sensor coupled to the pump inlet and configured to generate a second signal having a relation to the pump inlet side pressure, wherein the controller is coupled to the pressure sensor, and wherein the controller is further configured to control the motor based on the second signal. 8. A pumping apparatus as set forth in claim 1 wherein the motor is a brushless direct current motor. 9. A controller configured to control the operation of a pumping apparatus for a jetted-fluid system, the controller comprising: a memory;a processor connected to the memory and configured to access executable instructions stored within the memory related to the operation of the pumping apparatus;a current sensor connectable to the processor and operable to provide, to the processor, a signal having a relation to a current applied to a motor;the controller configured to determine a voltage having a relation to the motor,generate a value based on the signal, the determined voltage, and a phase angle between the signal and the determined voltage to control the motor,compare the value to a threshold value, anddetermine whether the value is indicative of a fault condition of the jetted-fluid system,wherein the fault condition is indicative of a suction-entrapment condition. 10. The controller of claim 9, wherein the controller is further configured to control the motor. 11. The controller of claim 10, wherein the controller is further configured to generate control signals for operating the motor at a first speed and at least one second speed. 12. The controller of claim 9, further comprising a pressure sensor connectable to the processor and operable to provide a signal having a relation to an inlet pressure of the pumping apparatus. 13. The controller of claim 9, wherein the threshold value is a motor input power threshold value. 14. The controller of claim 9, wherein the controller is further configured to be calibrated based on current conditions of the jetted-fluid system. 15. The controller of claim 9, wherein the controller is further configured to compare the value to a range of values around the threshold value. 16. The controller of claim 9, wherein the controller is further configured to cease operation of the pumping apparatus when the value is indicative of the fault condition of the jetted-fluid system. 17. The controller as set forth in claim 9 wherein the motor is a brushless direct current motor.
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