최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
|
출원번호 | US-0737566 (2013-01-09) |
등록번호 | US-8964338 (2015-02-24) |
발명자 / 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 | 피인용 횟수 : 2 인용 특허 : 1124 |
A system includes a refrigerant compressor including an electric motor, a current sensor that measures current flow to the electric motor, a switching device configured to close and open to allow and prevent current flow to the electric motor, respectively, a maximum continuous current (MCC) device
A system includes a refrigerant compressor including an electric motor, a current sensor that measures current flow to the electric motor, a switching device configured to close and open to allow and prevent current flow to the electric motor, respectively, a maximum continuous current (MCC) device that includes a resistance corresponding to a maximum continuous current for the electric motor, and a motor protection module. The motor protection module communicates with the MCC device, the current sensor, and the switching device and determines a first MCC value for the electric motor as a function of the resistance of the MCC device. The motor protection module also selectively sets a predetermined MCC to the first MCC and controls the switching device based on a comparison of the current flow to the electric motor and the predetermined MCC.
1. A system comprising: a refrigerant compressor including an electric motor;a current sensor that measures current flow to the electric motor;a switching device configured to close and open to allow and prevent current flow to the electric motor, respectively;a maximum continuous current (MCC) devi
1. A system comprising: a refrigerant compressor including an electric motor;a current sensor that measures current flow to the electric motor;a switching device configured to close and open to allow and prevent current flow to the electric motor, respectively;a maximum continuous current (MCC) device that includes a resistance corresponding to a maximum continuous current for the electric motor;a motor protection module that: communicates with the MCC device, the current sensor, and the switching device;determines a first MCC value for the electric motor as a function of the resistance of the MCC device;selectively sets a predetermined MCC to the first MCC value; andcontrols the switching device based on a comparison of the current flow to the electric motor and the predetermined MCC. 2. The system of claim 1 wherein the motor protection module opens the switching device when the current flow to the electric motor is greater than the predetermined MCC. 3. The system of claim 1 further comprising a temperature sensor that measures a temperature of the electric motor, wherein the motor protection module controls the switching device further based on a second comparison of the temperature of the electric motor and a predetermined temperature. 4. The system of claim 3 wherein the motor protection module opens the switching when the temperature is greater than the predetermined temperature. 5. The system of claim 1 wherein the MCC device includes a digitally programmable potentiometer having the resistance. 6. The system of claim 5 wherein the motor protection module selectively sets the resistance of the MCC device. 7. The system of claim 1 wherein the MCC device is integrated with the motor protection module. 8. The system of claim 1 further comprising a second MCC device that includes a second resistance corresponding to a second MCC for the electric motor, wherein the motor protection module: determines a second MCC value for the electric motor as a function of the second resistance; andselectively sets the predetermined MCC to the second MCC value. 9. The system of claim 8 wherein the motor protection module sets the predetermined MCC equal to a lesser one of the first and second MCC values. 10. The system of claim 8 wherein the second MCC device is integrated with the refrigerant compressor and remote from the motor protection module. 11. The system of claim 1 wherein the switching device includes a contactor. 12. A method comprising: measuring current flow to an electric motor of a refrigerant compressor using a current sensor;selectively opening and closing a switching device to allow and prevent current flow to the electric motor, respectively;communicating with the current sensor, the switching device, and a maximum continuous current (MCC) device, the MCC device including a resistance corresponding to a maximum continuous current for the electric motor;determining a first MCC value for the electric motor as a function of the resistance of the MCC device;selectively setting a predetermined MCC to the first MCC value; andcontrolling the switching device based on a comparison of the current flow to the electric motor and the predetermined MCC. 13. The method of claim 12 further comprising opening the switching device when the current flow to the electric motor is greater than the predetermined MCC. 14. The method of claim 12 further comprising: measuring a temperature of the electric motor using a temperature sensor; andcontrolling the switching device further based on a second comparison of the temperature of the electric motor and a predetermined temperature. 15. The method of claim 14 further comprising opening the switching device when the temperature is greater than the predetermined temperature. 16. The method of claim 12 wherein the determining the first MCC value for the electric motor as a function of the resistance of the MCC device comprises determining the resistance of a digitally programmable potentiometer of the MCC device. 17. The method of claim 16 further comprising selectively setting the resistance of the MCC device. 18. The method of claim 12 further comprising determining the resistance of the MCC device, wherein the MCC device is integrated with a motor protection module. 19. The method of claim 12 further comprising controlling the switching device further based on a second comparison of the resistance of the MCC device with a predetermined resistance range. 20. The method of claim 19 further comprising opening the switching device when the resistance of the MCC device is one of: less than a predetermined lower boundary of the predetermined resistance range; andgreater than a predetermined upper boundary of the predetermined resistance range. 21. The method of claim 12 further comprising: determining a second MCC value for the electric motor as a function of a second resistance of a second MCC device; andselectively setting the predetermined MCC to the second MCC value. 22. The method of claim 21 further comprising setting the predetermined MCC equal to a lesser one of the first and second MCC values. 23. The method of claim 21 further comprising determining the second resistance of the second MCC device, wherein the second MCC device is integrated with the refrigerant compressor and remote from a motor protection module.
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