Power control device and power control method
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G05F-001/66
H02J-003/14
출원번호
US-0421517
(2012-09-13)
등록번호
US-9523992
(2016-12-20)
국제출원번호
PCT/JP2012/073440
(2012-09-13)
§371/§102 date
20150213
(20150213)
국제공개번호
WO2014/041653
(2014-03-20)
발명자
/ 주소
Gotoh, Shigefumi
Akiho, Keisuke
Yoshikawa, Hirohisa
출원인 / 주소
RKC INSTRUMENT INC.
대리인 / 주소
Frost Brown Todd LLC
인용정보
피인용 횟수 :
0인용 특허 :
8
초록▼
To prevent loss of controllability associated with the change in total target power value, and suppress power supply voltage fluctuation. An upper limit value calculation section 20 is provided, which adds a correction value Hn calculated by a correction value calculation section 19 to a sum total Σ
To prevent loss of controllability associated with the change in total target power value, and suppress power supply voltage fluctuation. An upper limit value calculation section 20 is provided, which adds a correction value Hn calculated by a correction value calculation section 19 to a sum total Σxn of target power values x1n to xMn calculated by a total target power value calculation section 18, so as to calculate a power upper limit value PLIM for every load, such that an appropriate power upper limit value PLIM may be obtained depending on variation of the sum total Σxn of target power values x1n to xMn.
대표청구항▼
1. A power control device comprising: a plurality of switching control means for switching on and off power supplied to each controlled object at time intervals of predetermined unit time;a target power value calculation means for calculating a target power value that is a target value of the power
1. A power control device comprising: a plurality of switching control means for switching on and off power supplied to each controlled object at time intervals of predetermined unit time;a target power value calculation means for calculating a target power value that is a target value of the power supplied to each controlled object;an output power value calculation means for calculating an output power value that is a value of the power supplied to each controlled object;a power estimation means for estimating, for each controlled object, from the output power value calculated by the output power value calculation means while the power is supplied, a power value when the power is supplied to the controlled object within the unit time in the next control cycle;an upper limit value calculation means for calculating an upper limit value of supplied power values for all of the controlled objects per unit time, based on a sum total of the target power values of the respective controlled objects calculated by the target power value calculation means;an intermediate integrated power value calculation means for calculating a power difference integrated value by repeating an addition of the target power value calculated by the target power value calculation means and a subtraction of the output power value calculated by the output power value calculation means in every control cycle, and adding a power difference integrated value up to the previous control cycle and the target power value in the next control cycle calculated by the target power value calculation means, so as to calculate, for each controlled object, the added value that is the latest intermediate integrated power value; anda power control means which repeats, with respect to the respective controlled objects in order beginning with a controlled object having a larger intermediate integrated power value calculated by the intermediate integrated power value calculation means, the control to turn on the switching control means for the controlled object if a power supply condition is satisfied, and to turn off the switching control means for the controlled object if the power supply condition is not satisfied, thereby controlling ON and OFF of the switching control means in the next control cycle for all of the controlled objects, wherein the power supply condition is that the intermediate integrated power value of the controlled object is greater than a predetermined threshold, and if the power is to be supplied to the controlled object, a sum total of the power value of the controlled object estimated by the power estimation means and the power values of other controlled objects estimated by the power estimation means and determined to be powered in the next control cycle does not exceed the upper limit value calculated by the upper limit value calculation means. 2. The power control device according to claim 1, characterized in that the upper limit value calculation means adds a predetermined correction value to the sum total of the target power values of the respective controlled objects calculated by the target power value calculation means, so as to calculate the upper limit value of the supplied power value. 3. The power control device according to claim 1, characterized in that the upper limit value calculation means multiplies a predetermined coefficient and the sum total of the target power values of the respective controlled objects calculated by the target power value calculation means, so as to calculate the upper limit value of the supplied power value. 4. The power control device according to claim 1, characterized in that the upper limit value calculation means divides a sum total of the power difference integrated values of the respective controlled objects calculated by the intermediate integrated power value calculation means by a predetermined integral time, and then, adds the division result as a correction value to the sum total of the target power values of the respective controlled objects calculated by the target power value calculation means, so as to calculate the upper limit value of the supplied power value. 5. The power control device according to claim 1, characterized in that the upper limit value calculation means divides a difference between the sum total of the power difference integrated values of the respective controlled objects calculated by the intermediate integrated power value calculation means and a sum total of thresholds for the respective controlled objects, by a predetermined integral time, and then, adds the division result as a correction value to the sum total of the target power values of the respective controlled objects calculated by the target power value calculation means, so as to calculate the upper limit value of the supplied power value. 6. The power control device according to claim 2, characterized in that the correction value added by the upper limit value calculation means is within a range from zero value to the maximum value of power supplied to the respective controlled objects. 7. The power control device according to claim 4, characterized in that the upper limit value calculation means adds either of the correction value within the range from zero value to the maximum value of power supplied to the respective controlled objects or the correction value that is the result from the division by the predetermined integral time, to the sum total of the target power values of the respective controlled objects calculated by the target power value calculation means, thereby calculating the upper limit value of the supplied power value. 8. The power control device according to claim 5, characterized in that the upper limit value calculation means adds either of the correction value within the range from zero value to the maximum value of power supplied to the respective controlled objects or the correction value that is the result from the division by the predetermined integral time, to the sum total of the target power values of the respective controlled objects calculated by the target power value calculation means, thereby calculating the upper limit value of the supplied power value. 9. A power control method comprising: a plurality of switching steps in which a plurality of switching control means switch on and off power supplied to respective controlled objects at time intervals of predetermined unit time;a target power value calculation step in which a target power value calculation means calculates a target power value that is a target value of the power supplied to each controlled object;an output power value calculation step in which an output power value calculation means calculates an output power value that is a value of the power supplied to each controlled object;a power estimation step in which a power estimation means estimates, for each controlled object, from the output power value calculated in the output power value calculation step while the power is supplied, a power value when the power is supplied to the controlled object within the unit time in the next control cycle;an upper limit value calculation step in which an upper limit value calculation means calculates an upper limit value of supplied power values for all of the controlled objects per unit time, based on a sum total of the target power values of the respective controlled objects calculated in the target power value calculation step;an intermediate integrated power value calculation step in which an intermediate integrated power value calculation means calculates a power difference integrated value by repeating an addition of the target power value calculated in the target power value calculation step and a subtraction of the output power value calculated in the output power value calculation step in every control cycle, and adds the power difference integrated value up to the previous control cycle and the target power value in the next control cycle calculated in the target power value calculation step, so as to calculate, for each controlled object, the added value that is the latest intermediate integrated power value; anda power control step in which a power control means repeats, with respect to the respective controlled objects in order beginning with a controlled object having a larger intermediate integrated power value calculated in the intermediate integrated power value calculation step, the control to turn on the switching control means for the controlled object if a power supply condition is satisfied, and to turn off the switching control means for the controlled object if the power supply condition is not satisfied, thereby controlling ON and OFF of the switching control means in the next control cycle for all of the controlled objects, wherein the power supply condition is that the intermediate integrated power value of the controlled object is greater than a predetermined threshold, and if the power is to be supplied to the controlled object, a sum total of the power value of the controlled object estimated in the power estimation step and the power values of other controlled objects estimated in the power estimation step and determined to be powered in the next control cycle does not exceed the upper limit value calculated in the upper limit value calculation step.
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