Power management circuit for a multi-phase power supply
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01H-083/00
H02J-003/00
출원번호
US-0574584
(2014-12-18)
등록번호
US-9537316
(2017-01-03)
발명자
/ 주소
Ailenei, Gheorghe
출원인 / 주소
Tundra Process Solutions Ltd.
대리인 / 주소
Parlee McLaws LLP (CGY)
인용정보
피인용 횟수 :
0인용 특허 :
3
초록▼
A power management circuit for a multi-phase alternating current (AC) power supply is provided to manage a single phase bad, connected thereto, during a brownout condition. The management circuit is configured to switch the single phase electrical bad from an affected conductor of the AC power suppl
A power management circuit for a multi-phase alternating current (AC) power supply is provided to manage a single phase bad, connected thereto, during a brownout condition. The management circuit is configured to switch the single phase electrical bad from an affected conductor of the AC power supply and to connect the single phase electrical bad between two unaffected conductors of the AC power supply thereby ensuring continued supply of voltage to the single phase electrical load.
대표청구항▼
1. A power management circuit connected between a three phase alternating current (AC) power supply having at least three conductors and a single phase electrical load connected across two of the at least three conductors, the two conductors establishing a first electrical path between the AC power
1. A power management circuit connected between a three phase alternating current (AC) power supply having at least three conductors and a single phase electrical load connected across two of the at least three conductors, the two conductors establishing a first electrical path between the AC power supply and the single phase electrical load, the management circuit comprising: a first load switching module connected between the single phase electrical load and a first and a third conductor;a second load switching module connected between the single phase electrical load and the third and a second conductor;a third load switching module connected between the single phase electrical load and the first and the second conductor; anda control module operatively coupled to the first, second and third load switching module and to the first, second and third conductors;wherein the control module is sensitive to a change in a condition in any one of the first, second and third conductors and energizes the single phase electrical load by establishing an alternate electrical path between the AC power supply and any other of the first, second or third conductors through the respective first, second or third load switching modules. 2. The management circuit of claim 1, wherein the change in condition is a loss of current on the first, second or third conductors. 3. The management circuit of claim 1, wherein the change in condition is a current greater than a preset threshold current flowing through the first, second or third conductors. 4. The management circuit of claim 1, wherein the first, second and third conductors are high voltage conductors and the single phase electrical load is connected across the first and third high voltage conductors. 5. The management circuit of claim 1, wherein the first and second conductors are high voltage conductors and the third conductor is a neutral conductor and the single phase electrical load is connected across the first and third conductors. 6. The management circuit of claim 4, wherein the control module comprises three relays, a first relay connected to the first and third conductors and to the first load switching module, a second relay connected to the third and second conductors and to the second load switching module, a third relay connected to the first and second conductors and to the third load switching module, wherein if there is current flow in the first, second and third conductors, the first relay is activated to close the first load switching module and open the second and third load switching modules to energize the single phase electrical load through the first load switching module;if there is current flow in the third and second conductors and no current flow in the first conductor, the first relay being de-activated to open the first load switching module, the third load switching module remaining open, the second relay being activated to close the second load switching module to energize the single phase electrical load through the second load switching module; andif there is current flow in the first and second conductors and no current flow in the third conductor, the first relay being de-activated to open the first load switching module, the second load switching module remaining open, the third relay being activated to close the third load switching module to energize the single phase electrical load through the third load switching module. 7. The management circuit of claim 6 further comprising an interlock associated with the control module, to prevent simultaneous operation of the first, second and third relays. 8. The management circuit of claim 7, wherein each of the second and third relays comprises two normally closed contacts, at least one of the normally closed contact of each of the second and third relays being controlled by the first relay. 9. The management circuit of claim 6 further comprising a delay circuit having a prescribed delay time connected to the first relay to delay activation of the first load switching module. 10. The management circuit of claim 9, wherein the delay circuit is an electronic delay circuit and prescribed delay time is about 1 second to about 3 seconds. 11. The management circuit of claim 9, wherein the delay circuit is an electro-mechanical delay circuit and prescribed delay time is 2 seconds. 12. The management circuit of claim 1, wherein the each load switching module comprises two normally open switches, one for connecting each conductor to the single phase electrical load. 13. A power management circuit connected between an alternating current (AC) power supply and a single phase electrical load, the management circuit comprising: a first relay connected to a first hot conductor and a third hot conductor of the AC power supply and to the single phase electrical load through a first load switching module;a second relay connected to the third hot conductor and a second hot conductor of the AC power supply and to the single phase electrical load through a second load switching module;a third relay connected to the first hot conductor and the second hot conductor and to the single phase electrical load through a third load switching module;the first relay electrically coupled to a first normally closed relay contact associated with each of the second and third relays;the second relay electrically coupled to a second normally closed relay contact associated with the third relay;the third relay electrically coupled to a second normally closed relay contact associated with the second relay;wherein during operationif there is current flow in the first, second and third hot conductors, the first relay being activated to close the first load switching module, the first normally closed relay contacts of the second and third relays being opened to open the second and third load switching modules for establishing a first electrical path to the single phase electrical load through the first load switching module;if there is no current flow in the first hot conductor and there is current flow in the third and second hot conductors, the second relay being activated to close the second load switching module and establish a second electrical path to the electrical load through the second load switching module, absence of current flow in the third hot conductor failing to activate the first and third relays connected to the third hot conductor; andif there is no current flow in the third hot conductor and there is current flow in the first and second hot conductors, the third relay being activated to close the third load switching module and establish a third electrical path to the electrical load through the third load switching module, absence of current flow in the first hot conductor failing to activate the first and second relays connected to the first hot conductor.
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이 특허에 인용된 특허 (3)
Castenschiold Rene (New Vernon NJ) Andersen John P. (Hackettstown NJ), Automatic transfer switch.
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