[특허]Compressor protection and diagnostic system

Compressor protection and diagnostic system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F04B-049/06
출원번호	US-0685375 (2010-01-11)
등록번호	US-8475136 (2013-07-02)
발명자 / 주소	Jayanth, Nagaraj
출원인 / 주소	Emerson Climate Technologies, Inc.
대리인 / 주소	Harness, Dickey & Pierce, P.L.C.
인용정보	피인용 횟수 : 2 인용 특허 : 227

초록

A compressor includes at least one current sensor and processing circuitry in communication with the at least one current sensor. The processing circuitry declares a locked rotor condition when current drawn by the compressor is at least forty percent of peak locked rotor current.

대표청구항 ▼

1. A compressor comprising: at least one current sensor; andprocessing circuitry in communication with said at least one current sensor and operable to declare a locked rotor condition when current drawn by the compressor is at least forty percent of peak locked rotor current, said processing circuitry recording said peak locked rotor current as a highest current reading taken during a predetermined time period following start up of the compressor. 2. The compressor of claim 1, wherein said predetermined time period is equal to about one-hundred milliseconds. 3. The compressor of claim 1, further comprising a power interruption system in communication with said processing circuitry, said processing circuitry instructing said power interruption system to restrict power to the compressor if said locked rotor condition is determined. 4. The compressor of claim 1, wherein said processing circuitry issues a warning when said locked rotor condition is determined. 5. The compressor of claim 1, wherein said processing circuitry issues an alarm after a predetermined number of locked rotor conditions are determined. 6. The compressor of claim 1, wherein said processing circuitry is operable to declare a no three phase power alarm when a compressor demand input is read high for a predetermined time period in any one of a series of current transformer inputs. 7. The compressor of claim 6, wherein said predetermined time period is about two seconds. 8. The compressor of claim 6, wherein said alarm is reset if current is detected in any of the current transformer inputs or said compressor demand is read low for said predetermined time period. 9. The compressor of claim 1, wherein said processing circuitry sends a diagnostic signal to a diagnostic output to record the locked rotor fault. 10. The compressor of claim 1, wherein said at least one current sensor is a current transformer. 11. A method comprising: starting a motor of a compressor;recording current drawn by said motor for a first predetermined time period following said starting;comparing the highest current drawn by said motor during said first predetermined time period to running current drawn by said motor following said first predetermined time period; anddetermining whether said running current exceeds at least forty percent of said highest current. 12. The method of claim 11, wherein recording said current for said first predetermined time period includes recording said current for about one hundred milliseconds. 13. The method of claim 11, further comprising reading said current drawn by said motor following a second predetermined time period after said starting if said highest current exceeds a threshold value. 14. The method of claim 13, wherein said threshold value is equal to about three hundred Amps. 15. The method of claim 13, wherein said second predetermined time period is about eight hundred milliseconds. 16. The method of claim 13, further comprising declaring a seizure of said motor if said running current exceeds said highest current after said second predetermined time period. 17. The method of claim 16, further comprising interrupting power to said motor if said seizure is detected. 18. The method of claim 11, further comprising reading said current drawn by said motor following a second predetermined time period after said starting if said highest current is less than a threshold value. 19. The method of claim 18, wherein said threshold value is equal to about three hundred Amps. 20. The method of claim 18, wherein said second predetermined time period is about eight hundred milliseconds. 21. The method of claim 18, further comprising interrupting power to said motor if said running current is not less than about forty percent of said highest current after said second predetermined time period. 22. The method of claim 11, wherein said recording current drawn by said motor includes using a current transformer to record said current drawn by said motor. 23. The method of claim 11, further comprising declaring a locked rotor condition when said running current exceeds at least forty percent of said highest current.

이 특허에 인용된 특허 (227)

Federspiel Clifford C. (Cambridge MA) Asada Harukiko (Concord MA), Adaptable control of HVAC systems.
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Vaughn Eldon D. (1845 W. Skywood St. Brea CA 92621), Adaptive defrost control and method.
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Bos Peter J. (Manitowoc WI) Allard John J. (Morrison IL), Adaptive defrost system with ambient condition change detector.
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Beckey Thomas J. (Edina MN) Nelson Lorne W. (Bloomington MN), Adaptive refrigerant control algorithm.
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Anderson Richard M. (Smyrna TN) McGill ; III Robert S. (Murfreesboro TN) Ramsey Robert W. (Nashville TN), Air conditioner control.
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Anderson Richard M. (Smyrna TN) McGill ; III Robert S. (Murfreesboro TN) Ramsey Robert W. (Nashville TN), Air conditioner control.
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Anderson Richard M. (Smyrna TN) McGill ; III Robert S. (Murfreesboro TN) Ramsey Robert W. (Nashville TN), Air conditioner control.
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Kaneko Tomomichi (Tochigi JPX) Suzuki Shigeyasu (Tochigi JPX) Arakawa Shouji (Tochigi JPX), Air conditioner having a temperature dependent control device.
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Kampf Hans (Korb DEX) Lochmahr Karl (Vaihingen/Enz DEX), Air conditioner humidity control system.
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Kawai Nobuo (Fujinomiya JPX) Miwa Satoshi (Shizuoka JPX), Air conditioner with automatic selection and re-selection function for operating modes.
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Kuwabara Eiji (Fujishi JPX) Sakata Takayoshi (Jufishi JPX) Kawauchi Noboru (Shizuokashi JPX) Ide Yuuichi (Fujishi JPX) Matsuo Takeshi (Fujishi JPX), Air conditioning apparatus.
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Meckler Gershon (1176 Providence Cir. ; Apt. B Reston VA 22090), Air conditioning apparatus.
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Meckler Gershon (1703 Channel Tower Dr. Monmouth Beach NJ 07750), Air conditioning apparatus.
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Ohkoshi Seizi (Shizuoka JPX), Air conditioning apparatus.
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Umezu Kenji (Shizuoka JPX), Air conditioning apparatus.
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Lewis Carl M. (Onalaska WI) Ferguson Peter D. (La Crosse WI), Air conditioning apparatus including a heat pump.
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Sumikawa Seiji (Konan JPX) Noguchi Ichiro (Konan JPX), Air conditioning system for automotive vehicles.
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Mullen James (Marshalltown IA), Air conditioning system having latent and sensible cooling capability.
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Weintraub Morton (P.O. Box 229 Brooklyn NY 11230), Air conditioning system, including a means and method for controlling temperature, humidity and air velocity.
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Atkinson Michael J. (East Sussex GB3) Birch Peter H. (East Sussex GB3), Air cycle air conditioner for heating and cooling.
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Beverly John P. (East Aurora NY), Apparatus and method for controlling the temperature of a space.
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Behr Joseph L. (Des Peres MO) Hargraves David P. (Webster Groves MO), Apparatus for and method of automatically adjusting the superheat setting of a thermostatic expansion valve.
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Noguchi Ichiro (Saitama JPX), Apparatus for controlling a refrigerant expansion valve in a refrigeration system.
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Behr Joseph L. (Des Peres MO), Apparatus for controlling refrigerant feed rate in a refrigeration system.
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Stamp ; Jr. Custis L. (Tyler TX) Herzog Rollie R. (Louisville KY), Automatic control apparatus for a heat pump system.
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Stamp, Jr., Custis L.; Herzog, Rollie R., Automatic fault diagnostic apparatus for a heat pump air conditioning system.
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Shim Jae E. (Seoul KRX), Automatic operation control method of a refrigerator.
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Pohl Walter J. (Louisville KY), Blocked condenser airflow protection for refrigeration systems.
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Terry,Robert L.; Wyatt,Arnold G., Brushless and sensorless DC motor control system with locked and stopped rotor detection.
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Sunderland,Ted W., Communication network and method of communicating data on the same.
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Martin Robert L. (Little Silver NJ), Compressor control for a reversible heat pump.
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Lifson, Alexander; Taras, Michael F.; Fraser, Jr., Howard H., Compressor degradation detection system.
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Pham,Hung M., Compressor diagnostic and protection system.
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Pham,Hung M., Compressor diagnostic and protection system and method.
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Hahn, Greg; Sun, Zili; Zamudio, Carlos; Hugenroth, Jason; Barito, Thomas; Bush, James W.; Hill, Joe T.; Williams, John R., Compressor diagnostic and recording system.
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Shaw David N. (Unionville CT), Compressor heat pump system with maximum and minimum evaporator D 상세보기

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