Converting alternating current power to direct current power
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02J-005/00
H02M-001/36
H02M-001/42
H02M-003/158
H02M-007/217
출원번호
US-0856748
(2015-09-17)
등록번호
US-10033196
(2018-07-24)
발명자
/ 주소
Kim, Sangsun
Elias, Francisco Javier
O'Sullivan, Cornelius Bendict
출원인 / 주소
Google LLC
대리인 / 주소
Honigman Miller Schwartz and Cohn LLP
인용정보
피인용 횟수 :
0인용 특허 :
7
초록▼
A method for converting alternating current (AC) power to direct current (DC) power in a non-isolated power converter includes receiving a three-phase power supply, transforming the three phase power supply into six voltage phases, half-wave rectifying the AC current, applying a power factor correct
A method for converting alternating current (AC) power to direct current (DC) power in a non-isolated power converter includes receiving a three-phase power supply, transforming the three phase power supply into six voltage phases, half-wave rectifying the AC current, applying a power factor correction to achieve DC power, and outputting a DC power signal. The three-phase power supply has an AC current. The six voltage phase is transformed at a secondary side of a three-phase distribution transformer, which includes a center tap located at the secondary side of the three-phase distribution transformer and one or more AC wire conductors. The AC wire conductors carry the transformed power supply. The half-wave rectification occurs at the secondary side of the three-phase distribution transformer. An arrangement of rectifier diodes on the AC wire conductors accomplishes the half-wave rectification. The output DC power signal has an output voltage at a DC output.
대표청구항▼
1. A method for converting alternating current (AC) power to direct current (DC) power in a non-isolated power converter, the method comprising: receiving a three-phase power supply, the three-phase power supply having an AC current that is a full-wave sinusoidal AC current;transforming the three ph
1. A method for converting alternating current (AC) power to direct current (DC) power in a non-isolated power converter, the method comprising: receiving a three-phase power supply, the three-phase power supply having an AC current that is a full-wave sinusoidal AC current;transforming the three phase power supply into six voltage phases at a secondary side of a three-phase distribution transformer, the three-phase distribution transformer comprising a center tap on the secondary side and one or more AC wire conductors carrying the transformed power supply;half-wave rectifying the AC current at the secondary side of the three phase distribution transformer, the half wave rectification accomplished by an arrangement of rectifier diodes on the one or more AC wire conductors;applying a power factor correction to achieve DC power;outputting a DC power signal having an output voltage at a DC output, the output voltage is measured across one or more capacitors; andoperating one or more Q1 inrush and shutdown field-effect transistors, the one or more Q1 inrush and shutdown field-effect transistors configured to limit a current flow and to charge the one or more capacitors. 2. The method of claim 1, further comprising powering one or more DC loads with the output voltage. 3. The method of claim 1, further comprising providing an AC-rated device for AC protection on the one or more AC wire conductors. 4. The method of claim 1, wherein the DC output comprises a positive DC output and a DC output ground, and wherein the AC power at the secondary side of the three-phase distribution transformer is in non-isolated communication with the DC output ground through a neutral wire conductor. 5. The method of claim 4, wherein the AC power at the secondary side of the three-phase distribution transformer is grounded through a connection from the neutral wire conductor to a safety ground, wherein the DC output ground is grounded through the connection from the neutral wire conductor to the safety ground, and wherein the safety ground is a solid, low-, or high-impedance grounding. 6. A method for converting alternating current (AC) power to direct current (DC) power in a non-isolated power converter, the method comprising: receiving a three-phase power supply, the three-phase power supply having an AC current that is a full-wave sinusoidal AC current;transforming the three phase power supply into six voltage phases at a secondary side of a three-phase distribution transformer, the three-phase distribution transformer comprising a center tap on the secondary side and one or more AC wire conductors carrying the transformed power supply;half-wave rectifying the AC current at the secondary side of the three phase distribution transformer, the half wave rectification accomplished by an arrangement of rectifier diodes on the one or more AC wire conductors;applying a power factor correction to achieve DC power;outputting a DC power signal having an output voltage at a DC output; andoperating one or more Q2 ORing field-effect transistors, the one or more Q2 ORing field-effect transistors configured to turn off for fault isolation upon sensing a negative current flow from the DC output. 7. A non-isolated, three-phase rectifier comprising: an input arranged to accept a six-phase AC voltage input, the six-phase AC voltage input having a half-wave rectified current;a single-stage power factor correction without galvanized isolation in communication with the input;output conductors in communication with the single-stage power factor correction without galvanized isolation, the output conductors comprising a first output conductor configured to connect a DC ground to a distribution transformer neutral and a second output conductor configured to deliver a positive DC voltage to a single DC bus; andan ORing field-effect transistor connected to the second output conductor, the ORing field-effect transistor configured to isolate the rectifier when a fault occurs. 8. A power converter for converting alternating current (AC) power to direct current (DC) power, the power converter comprising: a three-phase distribution transformer for three-phase alternating current having a primary side and a secondary side with a center tap at the secondary side of the three-phase distribution transformer forming a transformer neutral, the three-phase alternating current having three incoming AC phases;a non-isolating three-phase rectifier in communication with the three-phase distribution transformer and having a positive DC output and a DC output ground, wherein the non-isolating three-phase rectifier comprises a rectifier diode on each incoming AC phase and at least one boost converter corresponding to each of the incoming AC phases;a bulk electrolytic capacitor residing connected between the positive DC output and the DC output ground; anda direct connection between the DC output ground and the transformer neutral. 9. The power converter of claim 8, wherein the center tap at the secondary side provides a six-phase AC voltage, wherein the AC current at the primary side is a full-wave sinusoidal AC current, and wherein the AC currents at the secondary side are half-wave rectified. 10. The power converter of claim 8, wherein the direct connection between the DC output ground and the transformer neutral is safety grounded at a solid, low-, or high-impedance grounding. 11. A non-isolated, three-phase rectifier comprising: an input arranged to accept a six-phase AC voltage input, the six-phase AC voltage input having a half-wave rectified current;a single-stage power factor correction without galvanized isolation in communication with the input;output conductors in communication with the single-stage power factor correction without galvanized isolation, the output conductors comprising a first output conductor configured to connect a DC ground to a distribution transformer neutral and a second output conductor configured to deliver a positive DC voltage to a single DC bus;an AC inrush and shutdown field-effect transistor connected to the second output conductor; anda bulk electrolytic capacitor connected to the first and second output conductors,wherein the AC inrush and shutdown field-effect transistor is configured to limit the current and charge the bulk electrolytic capacitor. 12. A power conversion system comprising: a plurality of non-isolated, three-phase rectifiers configured to operate in parallel, wherein at least one of the plurality of non-isolated, three-phase rectifiers comprises: an input arranged to accept a six-phase AC voltage input, the six-phase AC voltage input having a half-wave rectified current;a single-stage power factor correction without galvanized isolation in communication with the input;output conductors in communication with the single-stage power factor correction without galvanized isolation, the output conductors comprising a first output conductor configured to connect a DC ground to a distribution transformer neutral and a second output conductor configured to deliver a positive DC voltage to a single DC bus; andan ORing field-effect transistor connected to the second output conductor, the ORing field-effect transistor configured to isolate the rectifier when a fault occurs; andat least one distribution transformer having a primary winding accepting three-phase AC power and a secondary winding with a center tap that forms a transformer neutral,wherein the first output from the rectifier is directly connected to the distribution transformer neutral without isolation. 13. The power conversion system of claim 12, further comprising a rectifier diode configured to half-wave rectify the three-phase AC power at the secondary winding of the distribution transformer, wherein the center tap at the secondary winding provides a six-phase voltage. 14. The power conversion system of claim 13, wherein the six-phase voltage feeds at least one of the plurality of non-isolated, three-phase rectifiers. 15. The power conversion system of claim 13, wherein the six-phase voltage feeds more than one of the plurality of non-isolated, three-phase rectifiers.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (7)
Kim, Sangsun, Apparatus and methodology for generating an auxiliary low power output by using three-phase input power.
Whitted, William; Sykora, Montgomery; Krieger, Ken; Jai, Benchiao; Hamburgen, William; Clidaras, Jimmy; Beaty, Donald L.; Aigner, Gerald, Data center uninterruptible power distribution architecture.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.