Method for controlling motor operation using information characterizing regions of motor operation
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B25J-009/16
G05B-019/18
출원번호
US-0296412
(2011-11-15)
등록번호
US-8618761
(2013-12-31)
발명자
/ 주소
Hudson, Christopher Allen
Lobo, Nimal
Ramu, Krishnan
출원인 / 주소
Virginia Tech Intellectual Properties, Inc.
대리인 / 주소
NSIP Law
인용정보
피인용 횟수 :
2인용 특허 :
10
초록▼
A method for collecting operational parameters of a motor may include controlling the energization of a phase winding of the motor to establish an operating point, monitoring operational parameters of the motor that characterize a relationship between the energization control applied to the motor's
A method for collecting operational parameters of a motor may include controlling the energization of a phase winding of the motor to establish an operating point, monitoring operational parameters of the motor that characterize a relationship between the energization control applied to the motor's phase winding and the motor's response to this control, and collecting information of the operational parameters for the operating point that characterizes the relationship between the applied energization control and the motor's response. The collected information characterizing the relationship between the applied energization control and the motor's response may be employed by a neural network to estimate the regions of operation of the motor. And a system for controlling the operation of motor may employ this information, the neural network, or both to regulate the energization of a motor's phase winding during a phase cycle.
대표청구항▼
1. A method for controlling a motor, the method comprising: (a) estimating the motor's region of operation;(b) energizing a phase winding of the motor when the region of operation is estimated to be a region for applying motoring torque;(c) determining whether the motoring torque region of operation
1. A method for controlling a motor, the method comprising: (a) estimating the motor's region of operation;(b) energizing a phase winding of the motor when the region of operation is estimated to be a region for applying motoring torque;(c) determining whether the motoring torque region of operation has been errantly estimated;(d) discontinuing the energization of the motor phase winding when the estimated motoring torque region of operation is determined to be errant; and(e) repeating operations (a)-(d) to improve the synchronization between the initial energization of the motor phase winding for a phase cycle and the motor rotor's earliest position for receiving motoring torque in the phase cycle. 2. The method of claim 1, further comprising, after achieving improved synchronization, withholding energization of the motor phase winding for a period substantially equal to that for which the phase winding is energized in the phase cycle. 3. A method for controlling a motor, the method comprising: (a) estimating the motor's region of operation;(b) energizing a phase winding of the motor when the region of operation is estimated to be a region for applying motoring torque;(c) determining whether the motoring torque region of operation has been errantly estimated;(d) discontinuing the energization of the motor phase winding when the estimated motoring torque region of operation is determined to be errant;(e) revising the estimate of the motor's region of operation to reflect a regeneration region of operation when the estimated motoring torque region of operation is determined to be errant; and(f) withholding energization of the phase winding during a period when the regeneration region of operation is estimated. 4. A method for controlling a motor, the method comprising: (a) estimating the motor's region of operation;(b) energizing a phase winding of the motor when the region of operation is estimated to be a region for applying motoring torque;(c) determining whether the motoring torque region of operation has been errantly estimated;(d) discontinuing the energization of the motor phase winding when the estimated motoring torque region of operation is determined to be errant;(e) revising the estimate of the motor's region of operation to reflect a regeneration region of operation for the motor having a period that is half the period estimated for a combined motoring torque region of operation and regeneration region of operation; and(f) withholding energization of the phase winding during a period when the regeneration region of operation is estimated. 5. A method for controlling a motor, the method comprising: (a) estimating the motor's region of operation;(b) energizing a phase winding of the motor when the region of operation is estimated to be a region for applying motoring torque;(c) determining whether the motoring torque region of operation has been errantly estimated; and(d) discontinuing the energization of the motor phase winding when the estimated motoring torque region of operation is determined to be errant, whereinthe motoring torque region of operation is determined to be errantly estimated if a negative change in estimates of the motor's flux-linkage or phase winding inductance occurs with time. 6. A method for controlling a motor, the method comprising: (a) estimating the motor's region of operation;(b) energizing a phase winding of the motor when the region of operation is estimated to be a region for applying motoring torque;(c) determining whether the motoring torque region of operation has been errantly estimated; and(d) discontinuing the energization of the motor phase winding when the estimated motoring torque region of operation is determined to be errant, wherein:the motoring torque region of operation is determined to be errantly estimated if an estimate of the motor's flux-linkage or phase winding inductance exceeds a reference value corresponding to: (i) an expected amount of current applied in the energization of the phase winding, or(ii) a monitored indication of the current flowing through the phase winding. 7. A method for controlling a motor, the method comprising: (a) estimating the motor's region of operation;(b) energizing a phase winding of the motor when the region of operation is estimated to be a region for applying motoring torque;(c) determining whether the motoring torque region of operation has been errantly estimated; and(d) discontinuing the energization of the motor phase winding when the estimated motoring torque region of operation is determined to be errant, whereinthe motoring torque region of operation is determined to be errantly estimated if a change, with time, in estimates of the motor's rotor position with respect to the stator provides an indication that the motor's flux-linkage or phase winding inductance is decreasing. 8. A method for controlling a motor, the method comprising: (a) estimating the motor's region of operation;(b) energizing a phase winding of the motor when the region of operation is estimated to be a region for applying motoring torque;(c) determining whether the motoring torque region of operation has been errantly estimated; and(d) discontinuing the energization of the motor phase winding when the estimated motoring torque region of operation is determined to be errant, whereinthe determination of whether the motoring torque region of operation has been errantly estimated is based upon a comparison of: (1) a relationship between the energization applied to the motor phase winding and the motor's response to the applied energization and (2) an expected relationship between a particular energization applied to the motor phase winding and the motor's response to the particular energization for each of a plurality of different operating points defined by the motor's rotational speed, load, and operational environment. 9. The method of claim 8, further comprising controlling the energization of a main phase winding of the motor, for each of the operating points, so as to realize the expected relationship between the particular energization control and the motor's response thereto. 10. A system for controlling a motor, the system comprising: an estimation component that estimates the motor's region of operation;an energization component that energizes a phase winding of the motor when the region of operation is estimated to be a region for applying motoring torque; anda determination component that determines whether the motoring torque region of operation has been errantly estimated, wherein:the energization component discontinues energizing the motor phase winding when the estimated motoring torque region of operation is determined to be errant, andthe system components cooperate through repeated estimates of the motor's region of operation to improve the synchronization between the initial energization of the motor phase winding for a phase cycle and the motor rotor's earliest position for receiving motoring torque in the phase cycle. 11. The system of claim 10, wherein, after achieving improved synchronization, the system components cooperate to withhold energization of the motor phase winding for a period substantially equal to that for which the phase winding is energized in the phase cycle. 12. A system for controlling a motor, the system comprising: an estimation component that estimates the motor's region of operation;an energization component that energizes a phase winding of the motor when the region of operation is estimated to be a region for applying motoring torque; anda determination component that determines whether the motoring torque region of operation has been errantly estimated, wherein:the energization component discontinues energizing the motor phase winding when the estimated motoring torque region of operation is determined to be errant, andthe system components cooperate to: revise the estimate of the motor's region of operation to reflect a regeneration region of operation when the estimated motoring torque region of operation is determined to be errant; andwithhold energization of the phase winding during a period when the regeneration region of operation is estimated. 13. A system for controlling a motor, the system comprising: an estimation component that estimates the motor's region of operation;an energization component that energizes a phase winding of the motor when the region of operation is estimated to be a region for applying motoring torque; anda determination component that determines whether the motoring torque region of operation has been errantly estimated, wherein:the energization component discontinues energizing the motor phase winding when the estimated motoring torque region of operation is determined to be errant, andthe system components cooperate to: revise the estimate of the motor's region of operation to reflect a regeneration region of operation for the motor having a period that is half the period estimated for a combined motoring torque region of operation and regeneration region of operation; andwithhold energization of the phase winding during a period when the regeneration region of operation is estimated. 14. A system for controlling a motor, the system comprising: an estimation component that estimates the motor's region of operation;an energization component that energizes a phase winding of the motor when the region of operation is estimated to be a region for applying motoring torque; anda determination component that determines whether the motoring torque region of operation has been errantly estimated, wherein:the energization component discontinues energizing the motor phase winding when the estimated motoring torque region of operation is determined to be errant, andthe motoring torque region of operation is determined to be errantly estimated if a negative change in estimates of the motor's flux-linkage or phase winding inductance occurs with time. 15. A system for controlling a motor, the system comprising: an estimation component that estimates the motor's region of operation;an energization component that energizes a phase winding of the motor when the region of operation is estimated to be a region for applying motoring torque; anda determination component that determines whether the motoring torque region of operation has been errantly estimated, wherein:the energization component discontinues energizing the motor phase winding when the estimated motoring torque region of operation is determined to be errant, andthe motoring torque region of operation is determined to be errantly estimated if an estimate of the motor's flux-linkage or phase winding inductance exceeds a reference value corresponding to: (i) an expected amount of current applied in the energization of the phase winding, or(ii) a monitored indication of the current flowing through the phase winding. 16. A system for controlling a motor, the system comprising: an estimation component that estimates the motor's region of operation;an energization component that energizes a phase winding of the motor when the region of operation is estimated to be a region for applying motoring torque; anda determination component that determines whether the motoring torque region of operation has been errantly estimated, wherein:the energization component discontinues energizing the motor phase winding when the estimated motoring torque region of operation is determined to be errant, andthe motoring torque region of operation is determined to be errantly estimated if a change, with time, in estimates of the motor's rotor position with respect to the stator provides an indication that the motor's flux-linkage or phase winding inductance is decreasing. 17. A system for controlling a motor, the system comprising: an estimation component that estimates the motor's region of operation;an energization component that energizes a phase winding of the motor when the region of operation is estimated to be a region for applying motoring torque; anda determination component that determines whether the motoring torque region of operation has been errantly estimated, wherein:the energization component discontinues energizing the motor phase winding when the estimated motoring torque region of operation is determined to be errant, anddetermination of whether the motoring torque region of operation has been errantly estimated is based upon a comparison of: (1) a relationship between the energization applied to the motor phase winding and the motor's response to the applied energization and (2) an expected relationship between a particular energization applied to the motor phase winding and the motor's response to the particular energization for each of a plurality of different operating points defined by the motor's rotational speed, load, and operational environment. 18. The system of claim 17, further comprising a control component that controls energization applied, by the energization component, to a main phase winding of the motor, for each of the operating points, to realize the expected relationship between the particular energization control and the motor's response thereto.
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