Wind power charging circuit with three-phase, single-stage and bridgeless framework
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02J-007/14
H02J-007/34
출원번호
US-0965905
(2015-12-11)
등록번호
US-10063089
(2018-08-28)
발명자
/ 주소
Chiang, Hsuang-Chang
Chen, Kun-Feng
Ho, Chin-Yu
Yang, Hsu-Pin
출원인 / 주소
National Chung-Shan Institute of Science & Technology
인용정보
피인용 횟수 :
0인용 특허 :
2
초록▼
The present invention provides a novel wind power charging circuit with three-phase, single-stage and bridgeless framework. This novel wind power charging circuit is developed based on an isolated single-ended primary-inductance converter (SEPIC) having buck-boost converting function, and can be app
The present invention provides a novel wind power charging circuit with three-phase, single-stage and bridgeless framework. This novel wind power charging circuit is developed based on an isolated single-ended primary-inductance converter (SEPIC) having buck-boost converting function, and can be applied in a wind turbine system for increasing the operation scope of the input voltage provided by a wind turbine of the wind turbine system, so as to facilitate the wind turbine system include wide-range operation scope under different wind speeds, such that the electric energy production and the electromechanical conversion efficiency of the wind turbine system are able to be effectively enhanced. In addition, because this novel wind power charging circuit does not include any bridgeless PFC circuits and bridge-type diode rectifiers, the low conducting loss as well as the whole circuit volume and assembly cost of the wind turbine system can be simultaneously reduced.
대표청구항▼
1. A wind power charging circuit with three-phase, single-stage and bridgeless framework, being used for connecting to a wind turbine so as to treat an electric power outputted by the wind turbine with a power converting process; the wind power charging circuit comprises: a first electromagnetic int
1. A wind power charging circuit with three-phase, single-stage and bridgeless framework, being used for connecting to a wind turbine so as to treat an electric power outputted by the wind turbine with a power converting process; the wind power charging circuit comprises: a first electromagnetic interference (EMI) filtering unit, having a first filtering inductor and a first filtering capacitor, wherein the first filtering inductor is a first mutual inductor induced by a R-phase winding of three phase windings of the wind turbine;a first energy storing unit, being coupled to the first EMI filtering unit for storing an R-phase current outputted by the wind turbine;a first power switching unit, being connected between the first EMI filtering unit and the first energy storing unit, used for executing constant-frequency ON/OFF switching operation so as to make the first energy storing unit output a first primary side voltage;a second electromagnetic interference (EMI) filtering unit, having a second filtering inductor and a second filtering capacitor, wherein the second filtering inductor is a second mutual inductor induced by a S-phase winding of the three phase windings of the wind turbine;a second energy storing unit, being coupled to the second EMI filtering unit for storing a S-phase current outputted by the wind turbine;a second power switching unit, being connected between the second EMI filtering unit and the second energy storing unit, used for executing constant-frequency ON/OFF switching operation so as to make the second energy storing unit output a second primary side voltage;a third electromagnetic interference (EMI) filtering unit, having a third filtering inductor and a third filtering capacitor, wherein the third filtering inductor is a third mutual inductor induced by a T-phase winding of the three phase windings of the wind turbine;a third energy storing unit, being coupled to the third EMI filtering unit for storing a T-phase current outputted by the wind turbine;a third power switching unit, being connected between the third EMI filtering unit and the third energy storing unit, used for executing constant-frequency ON/OFF switching operation so as to make the third energy storing unit output a third primary side voltage;a three-phase transformer, being coupled to the first energy storing unit, the second energy storing unit and the third energy storing unit, used for receiving the first primary side voltage, the second primary side voltage and the third primary side voltage and then outputting a first secondary side voltage, a second secondary side voltage and a third secondary side voltage; andan output rectifying unit, being coupled to the three-phase transformer, used for receiving the first secondary side voltage, the second secondary side voltage and the third secondary side voltage, and then output an output voltage to a load after completing a rectifying and filtering process;Wherein the first energy storing unit comprises: a first energy storing inductor, wherein one end of the first energy storing inductor is connected to the first filtering inductor and the first filtering capacitor, and another end of the first energy storing inductor being coupled to the first power switching unit; anda first energy storing capacitor, wherein one end of the first energy storing capacitor is coupled to the first power switching unit connected to the another end of the first energy storing inductor, and another end of the first energy storing capacitor being coupled to the three-phase transformer;Wherein the second energy storing unit comprises: a second energy storing inductor, wherein one end of the second energy storing inductor is connected to the second filtering inductor and the second filtering capacitor, and another end of the second energy storing inductor being coupled to the second power switching unit; anda second energy storing capacitor, wherein one end of the second energy storing capacitor is coupled to the second power switching unit connected to the another end of the second energy storing inductor, and another end of the second energy storing capacitor being coupled to the three-phase transformer;Wherein the third energy storing unit comprises: a third energy storing inductor, wherein one end of the third energy storing inductor is connected to the third filtering inductor and the third filtering capacitor, and another end of the third energy storing inductor being coupled to the third power switching unit; anda third energy storing capacitor, wherein one end of the third energy storing capacitor is coupled to the third power switching unit connected to the another end of the third energy storing inductor, and another end of the third energy storing capacitor being coupled to the three-phase transformer. 2. The wind power charging circuit of claim 1, wherein the load is an electricity bank. 3. The wind power charging circuit of claim 1, wherein the three-phase transformer is a Y-Δ transformer. 4. The wind power charging circuit of claim 1, further comprising: an input-end signal sampling unit, being connected between the first EMI filtering unit and the first energy storing unit, the second EMI filtering unit and the second energy storing unit as well as the third EMI filtering unit and the third energy storing unit, used for sampling the three phase currents and/or the three phase voltages outputted by the wind turbine, so as to output a first sample signal;an output-end signal sampling unit, being connected between the output rectifying unit and the load, used to treat the output voltage with a signal sampling process, so as to output a second sample signal;a processing and controlling unit, being coupled to the input-end signal sampling unit and the output-end signal sampling unit for receiving the first sample signal and the second sample signal, and then outputting an error modulation signal after completing a process and calculation operation according to the first sample signal and the second sample signal; anda PWM controlling unit, being coupled to the processing and controlling unit for receiving the error modulation signal, so as to output PWM signals to the first power switching unit, the second power switching unit and the third power switching unit according to the error modulation signal. 5. The wind power charging circuit of claim 1, wherein the first power switching unit comprises: a first power transistor, wherein the source terminal of the first power transistor is connected between the first energy storing inductor and the first energy storing capacitor, and a first diode being connected to the source terminal and the drain terminal of the first power transistor by the positive terminal and negative terminal thereof; anda second power transistor, wherein the source terminal and the drain terminal of the second power transistor are respectively connected to the drain terminal of the first power transistor and a ground of the wind power charging circuit; moreover, a second diode being connected to the source terminal and the drain terminal of the second power transistor by the positive terminal and negative terminal thereof. 6. The wind power charging circuit of claim 1, wherein the second power switching unit comprises: a third power transistor, wherein the source terminal of the third power transistor is connected between the second energy storing inductor and the second energy storing capacitor, and a third diode being connected to the source terminal and the drain terminal of the third power transistor by the positive terminal and negative terminal thereof; anda fourth power transistor, wherein the source terminal and the drain terminal of the fourth power transistor are respectively connected to the drain terminal of the third power transistor and the ground of the wind power charging circuit; moreover, a fourth diode being connected to the source terminal and the drain terminal of the fourth power transistor by the positive terminal and negative terminal thereof. 7. The wind power charging circuit of claim 1, wherein the third power switching unit comprises: a fifth power transistor, wherein the source terminal of the fifth power transistor is connected between the third energy storing inductor and the third energy storing capacitor, and a fifth diode being connected to the source terminal and the drain terminal of the fifth power transistor by the positive terminal and negative terminal thereof; anda sixth power transistor, wherein the source terminal and the drain terminal of the sixth power transistor are respectively connected to the drain terminal of the fifth power transistor and the ground of the wind power charging circuit; moreover, a sixth diode being connected to the source terminal and the drain terminal of the sixth power transistor by the positive terminal and negative terminal thereof.
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이 특허에 인용된 특허 (2)
Kellenbenz Carl W. (Baltimore MD) Goodman James P. (Annapolis MD) Rector Randall C. (Annapolis MD), Solid state programmable dynamic load simulator.
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