Capacitive power system having a service life extending approach
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02J-007/00
H02J-007/34
출원번호
US-0599953
(2012-08-30)
등록번호
US-9379577
(2016-06-28)
발명자
/ 주소
Stupka, Radek
출원인 / 주소
Honeywell International Inc.
대리인 / 주소
Seager, Tufte & Wickhem, LLP
인용정보
피인용 횟수 :
0인용 특허 :
8
초록▼
A capacitive power system having a service life extending approach. The system may have an ultra or super capacitor with high capacitance. A predetermined amount of energy may be stored in the capacitor, sufficient for providing power to an electrically powered mechanism in the event the mechanism l
A capacitive power system having a service life extending approach. The system may have an ultra or super capacitor with high capacitance. A predetermined amount of energy may be stored in the capacitor, sufficient for providing power to an electrically powered mechanism in the event the mechanism loses its power, to place it in a fail safe condition. With the capacitor at an initial capacitance, the working voltage may be set as low as possible while still retaining sufficient capacity for storing the predetermined amount of energy. As the capacitor's capacitance decreases with age, the working voltage of the capacitor may be gradually increased to compensate for lost capacitance. If the mechanism loses power, then a discharge of the capacitor may be initiated to transfer energy to the mechanism. If the electrical mechanism has power, then a charging of the capacitor may be initiated to transfer energy to the capacitor.
대표청구항▼
1. A system having a service life extender for a capacitor, comprising: a power module connected to a capacitor; anda diagnostics module connected to the power module; andwherein: the diagnostics module determines a minimum working voltage of the capacitor needed for storing a predetermined amount o
1. A system having a service life extender for a capacitor, comprising: a power module connected to a capacitor; anda diagnostics module connected to the power module; andwherein: the diagnostics module determines a minimum working voltage of the capacitor needed for storing a predetermined amount of energy; the power module controls current and voltage at the capacitor; the predetermined amount of energy is sufficient for providing a failsafe condition for an electrical mechanism if a power-off condition to the electrical mechanism is detected;if the capacitor is determined to be insufficient to store the predetermined amount of energy at the minimum working voltage, then the minimum working voltage is increased to provide energy storage sufficient to store the predetermined amount of energy;the diagnostics module continuously measures a voltage at the capacitor and determines whether the voltage is equal to or greater than the minimum working voltage needed for storing the predetermined amount of energy;if the voltage is equal to or greater than the minimum working voltage, then a charge cycle is not needed;if the voltage is less than the minimum working voltage and the power-on condition is detected, then a charge cycle is initiated and continued until the voltage is equal to or greater than the minimum working voltage plus a hysteresis voltage; andif a power-off condition is detected, then a discharge cycle is initiated and energy is transferred from the capacitor to an electrical mechanism to provide the fail safe condition for the electrical mechanism. 2. The system of claim 1, further comprising: a monitor connected to the power module; andwherein: the monitor detects a power-on or power-off condition of the electrical mechanism. 3. The system of claim 1, wherein: the electrical mechanism is an actuator; andthe failsafe condition is a position of a damper or valve controlled by the actuator, placed in a safe power-off position. 4. The system of claim 2, wherein the capacitor has a capacitance of one or more farads. 5. The system of claim 2, wherein the minimum working voltage of the capacitor, needed to store the predetermined amount of energy, is increased as necessary to compensate for decreased capacitance of the capacitor due to deterioration. 6. A method for expanding a service life of a capacitor, comprising: providing a capacitor for storing a predetermined amount of energy;providing an electrical mechanism that uses the predetermined amount of energy from the capacitor to achieve a failsafe condition if the mechanism loses power;determining the predetermined amount of energy needed to place the electrical mechanism in the failsafe condition if the electrical mechanism loses power;initiating a discharge cycle of the capacitor to transfer the predetermined amount of energy from the capacitor to the electrical mechanism to achieve the failsafe condition when the mechanism loses power;periodically determining a minimal working voltage of the capacitor needed to store the predetermined amount of energy in the capacitor;increasing or decreasing the minimal working voltage to be merely sufficient for the capacitor to store the predetermined amount of energy;wherein: the capacitor has a capacitance sufficient to store X times the predetermined amount of energy; and X≧1. 7. The method of claim 6, further comprising initiating a charge cycle of the capacitor to transfer energy from the electrical mechanism to the capacitor as needed to store the predetermined amount of energy when the electrical mechanism has power. 8. The method of claim 6, further comprising: periodically measuring voltage at the capacitor; andwherein: if the voltage is less than the minimal working voltage, then transfer energy from the electrical mechanism to the capacitor; andif the voltage is equal to or greater than the minimal working voltage plus a hysteresis voltage, then stop transferring energy from the electrical mechanism to the capacitor. 9. The method of claim 6, further comprising: determining the normal rated working voltage of the capacitor; andimplementing the capacitor at a minimum working voltage that is Y times the normal rated working voltage of the capacitor, wherein Y≦1. 10. The method of claim 9, wherein the capacitor is a super capacitor having a value greater than one farad. 11. The method of claim 9, wherein: the electrical mechanism is an actuator; andthe fail safe condition is a position of a damper or valve controlled by the actuator, placed in a safe position. 12. A capacitive power source having a service life extending approach, comprising: a capacitor control block connected to the capacitor module; anda diagnostics module connected to the capacitor control block; andwherein: the capacitor module comprises a capacitor;the capacitor is operated at a minimum working voltage which is less than a maximum rated working voltage of the capacitor;the diagnostics module determines the minimum working voltage for storing a predetermined amount of energy; andthe predetermined amount of energy is for providing a failsafe condition for an electrical mechanism in an event of a power-off condition of the electrical mechanism. 13. The system of claim 12, wherein the minimum working voltage of the capacitor is increased as needed to compensate for decreased energy storage of the capacitor occurring over time. 14. The system of claim 12, wherein: the capacitor control block further comprises a monitor and a power module connected to the diagnostics module; the monitor provides a signal to the diagnostics module when detecting the power-off condition of the electrical mechanism; andthe power module controls current and voltage at the capacitor module for providing and/or receiving energy. 15. The system of claim 14, wherein: the power module is for receiving and providing energy and is connected to the electrical mechanism; andthe power module provides backup energy when the electrical mechanism has a power-off condition, to place the electrical mechanism in a fail safe condition. 16. The system of claim 15, wherein: the electrical mechanism is an actuator; andthe fail safe condition is a safe position of a damper or valve when the actuator has a power-off condition. 17. The system of claim 12, wherein the capacitor is a super capacitor having a capacitance of one or more farads.
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이 특허에 인용된 특허 (8)
Verbrugge, Mark W.; Frisch, Damon R., Adaptive algorithm to control and characterize super-capacitor performance.
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