Refrigeration systems with voltage modulated compressor motors and methods of their control
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F25B-049/00
F25B-001/00
출원번호
US-0520052
(2006-12-18)
등록번호
US-8375735
(2013-02-19)
국제출원번호
PCT/US2006/048025
(2006-12-18)
§371/§102 date
20090618
(20090618)
국제공개번호
WO2008/076102
(2008-06-26)
발명자
/ 주소
Lifson, Alexander
Taras, Michael F.
출원인 / 주소
Carrier Corporation
인용정보
피인용 횟수 :
1인용 특허 :
5
초록▼
A refrigerant system is provided that includes a compressor, a motor for driving the compressor, a refrigerant system component, and a controller. The refrigerant system component can operate in a pulse width modulated mode having a loaded phase and an unloaded phase. The compressor motor is loaded
A refrigerant system is provided that includes a compressor, a motor for driving the compressor, a refrigerant system component, and a controller. The refrigerant system component can operate in a pulse width modulated mode having a loaded phase and an unloaded phase. The compressor motor is loaded in the loaded phase but unloaded in the unloaded phase. The controller applies a first voltage to the compressor motor in the loaded phase and a second voltage to the compressor motor in the unloaded phase. Here, the second voltage is less than the first voltage.
대표청구항▼
1. A refrigerant system comprising: a compressor motor;the compressor motor configured for operation in a normal, full line voltage mode, a pulse width modulated mode having a loaded phase and a pulse width modulated mode having an unloaded phase, said compressor motor being loaded in said loaded ph
1. A refrigerant system comprising: a compressor motor;the compressor motor configured for operation in a normal, full line voltage mode, a pulse width modulated mode having a loaded phase and a pulse width modulated mode having an unloaded phase, said compressor motor being loaded in said loaded phase and said compressor motor being unloaded in said unloaded phase; anda controller configured to apply a first voltage to said compressor motor in said normal mode, apply the first voltage to said compressor motor in the pulse width modulated mode loaded phase and apply a second voltage to said compressor motor in said pulse width modulated mode unloaded phase, said second voltage being less than said first voltage;wherein said controller uses a DELTA wiring configuration in said unloaded phase and uses a WYE wiring configuration in said loaded phase. 2. The refrigerant system as in claim 1, further comprising a suction valve disposed at a suction line leading to a compressor driven by said compressor motor. 3. The refrigerant system as in claim 1, wherein said second voltage is less than about 85% of said first voltage. 4. The refrigerant system as in claim 1, wherein said second voltage is less than about 65% of said first voltage. 5. The refrigerant system as in claim 1, wherein said controller is further configured to control said compressor motor to switch between said loaded and unloaded phases of said pulse width modulate mode. 6. The refrigerant system as in claim 1, wherein said controller synchronizes a voltage cycle between said first and second voltages to a pulse width modulated cycle between said loaded and unloaded phases. 7. The refrigerant system as in claim 1, wherein said controller offsets a voltage cycle between said first and second voltages to a pulse width modulated cycle between said loaded and unloaded phases. 8. The refrigerant system as in claim 7, wherein said controller offsets said voltage cycle by about 1 second to about 3 seconds. 9. The refrigerant system as in claim 1, wherein said controller provides a voltage cycle between said first and second voltages that is identical in length to a pulse width modulated cycle between said loaded and unloaded phases. 10. The refrigerant system as in claim 1, wherein said controller provides a voltage cycle between said first and second voltages that is different in length to a pulse width modulated cycle between said loaded and unloaded phases. 11. The refrigerant system as in claim 1, wherein said controller comprises a transformer to directly vary voltage to said compressor motor between said first and second voltages. 12. A method of controlling a refrigerant system, comprising: switching a refrigerant system compressor motor between a normal, full line voltage mode, a pulse width modulated loaded phase and pulse width modulated unloaded phase;applying a first voltage to the compressor motor during the normal mode;applying the first voltage to the compressor motor in said pulse width modulated loaded phase; andapplying a second voltage to said compressor motor in said pulse width modulated unloaded phase, said second voltage being lower than said first voltage;wherein adjusting voltage to said compressor motor comprises switching between a DELTA wiring configuration in said unloaded phase and a WYE wiring configuration in said loaded phase. 13. The method as in claim 12, further comprising: closing a suction valve disposed at a suction line leading to a compressor driven by said compressor motor to provide said unloaded phase; andopening said suction valve to provide said loaded phase. 14. The method as in claim 12, wherein switching said compressor motor between said loaded phase and said unloaded phase comprises: controlling a compressor driven by said compressor motor to compress said refrigerant in said loaded phase; andcontrolling said compressor driven by said compressor motor to provide a reduced compression to said refrigerant in said unloaded phase. 15. The method as in claim 12, wherein said second voltage is less than about 75% of said first voltage. 16. The method as in claim 12, further comprising synchronizing a voltage cycle between said first and second voltages to a pulse width modulated cycle between said loaded and unloaded phases. 17. The method as in claim 12, further comprising offsetting a voltage cycle between said first and second voltages to a pulse width modulated cycle between said loaded and unloaded phases. 18. The method as in claim 17, comprising offsetting said voltage cycle by about 1 second to about 3 seconds. 19. The method as in claim 12, further comprising providing a voltage cycle between said first and second voltages that is identical in length to a pulse width modulated cycle between said loaded and unloaded phases. 20. The method as in claim 12, further comprising providing a voltage cycle between said first and second voltages that is different in length to a pulse width modulated cycle between said loaded and unloaded phases. 21. The method as in claim 12, further comprising controlling a transformer to directly vary voltage to said compressor motor between said first and second voltages. 22. A refrigerant system comprising: a compressor motor;the compressor motor configured for operation in a normal, full line voltage mode, a pulse width modulated mode having a loaded phase and a pulse width modulated mode having an unloaded phase, said compressor motor being loaded in said loaded phase and said compressor motor being unloaded in said unloaded phase;a controller configured to apply a first voltage to said compressor motor in said normal mode, apply the first voltage to said compressor motor in the pulse width modulated mode loaded phase and apply a second voltage to said compressor motor in said pulse width modulated mode unloaded phase, said second voltage being less than said first voltage; anda compressor driven by said compressor motor;wherein said controller is further configured to control said compressor motor to switch between said loaded and unloaded phases of said pulse width modulated mode;wherein said controller offsets a voltage cycle between said first and second voltages to a pulse width modulated cycle between said loaded and unloaded phases, wherein said controller offsets said voltage cycle by about 1 second to about 3 seconds;wherein said controller provides a voltage cycle between said first and second voltages that is different in length to a pulse width modulated cycle between said loaded and unloaded phases.
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이 특허에 인용된 특허 (5)
Wills Frank E. (York PA), Control system for AC induction motor.
Eber David H. (La Crosse WI) Kotlarek Peter A. (La Crosse WI) Okoren Ronald W. (Holmen WI), Temperature sensitive solenoid valve in a scroll compressor.
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