[특허]Magnetically geared generator

Magnetically geared generator 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F03D-009/00 H02P-009/04
출원번호	US-0543683 (2009-08-19)
등록번호	US-8299641 (2012-10-30)
우선권정보	EP-08163611 (2008-09-03)
발명자 / 주소	Vyas, Parag Waszak, Michal-Wolfgang
출원인 / 주소	General Electric Company
대리인 / 주소	Global Patent Operation
인용정보	피인용 횟수 : 0 인용 특허 : 34

초록 ▼

The present invention provides a magnetically geared generator including an inner winding unit having a first number of pole pairs, an outer winding unit arranged coaxially around the inner winding unit and having a second number of pole pairs, and a rotatable magnetic flux modulator arranged coaxially between the inner winding unit and the outer winding unit. The inner winding unit, the outer winding unit and the rotatable magnetic flux modulator are adapted to convert rotational input energy provided at the rotatable magnetic flux modulator into electrical output energy provided as an alternating output current at one of the inner winding unit and the outer winding unit, and to control an output frequency of the alternating output current by communicating output energy as an alternating feedback current to the other one of the inner winding unit and the outer winding unit and by adjusting a feedback frequency of the alternating feedback current.

대표청구항 ▼

1. A magnetically geared generator, comprising: a inner winding unit having a first number of pole pairs;an outer winding unit arranged coaxially around the inner winding unit and having a second number of pole pairs; anda rotatable magnetic flux modulator arranged coaxially between the inner winding unit and the outer winding unit, wherein the inner winding unit, the outer winding unit and the rotatable magnetic flux modulator are adaptedto convert rotational input energy provided at the rotatable magnetic flux modulator into electrical output energy provided as an alternating output current at one of the inner winding unit and the outer winding unit, andto control an output frequency of the alternating output current by communicating output energy as an alternating feedback current to the other one of the inner winding unit and the outer winding unit and by adjusting a feedback frequency of the alternating feedback current. 2. The magnetically geared generator in accordance with claim 1, wherein the frequency of the alternating output current corresponds to the grid frequency. 3. The magnetically geared generator in accordance with claim 1, wherein a rotational frequency of the rotatable magnetic flux modulator is determined by means of a rotation sensor connected to a central axis the rotatable magnetic flux modulator. 4. The magnetically geared generator in accordance with claim 1, wherein the rotatable magnetic flux modulator comprises a plurality of pole pieces, wherein the number NP of pole pieces corresponds to NP=PR±PS wherein PR is the first number of pole pairs and PS is the second number of pole pairs. 5. The magnetically geared generator in accordance with claim 1, wherein the frequency of the alternating output current is measured by means of a frequency counting unit. 6. The magnetically geared generator in accordance with claim 1, wherein the magnetically geared generator provides a transformation of a low rotational frequency of the rotatable magnetic flux modulator into a high frequency of the alternating output current provided at one of the inner winding unit and the outer winding unit. 7. The magnetically geared generator in accordance with claim 1, wherein the frequency of the alternating output current exceeds the rotational frequency of the rotatable magnetic flux modulator by a factor which is determined by a magnetic gear ratio of the magnetically geared generator. 8. An energy conversion apparatus adapted for converting rotational energy having a varying rotational frequency into electrical energy having a fixed frequency, the energy conversion apparatus comprising: a drive shaft for inputting the rotational energy;a rotation sensor for detecting the rotational frequency;a magnetically geared generator, comprisinga inner winding unit having a first number of pole pairs;an outer winding unit arranged coaxially around the inner winding unit and having a second number of pole pairs; anda rotatable magnetic flux modulator arranged coaxially between the inner winding unit and the outer winding unit, whereinrotational input energy provided at the rotatable magnetic flux modulator is converted into electrical output energy provided as an alternating output current at one of the inner winding unit and the outer winding unit, whereinan output frequency of the alternating output current is controlled by communicating output energy as an alternating feedback current to the other one of the inner winding unit and the outer winding unit and by adjusting a feedback frequency of the alternating feedback current;andan electrical output unit for outputting the electrical energy. 9. A wind turbine comprising a rotor adapted for converting wind energy into mechanical energy, the rotor having a main shaft and a plurality of rotor blades, and a hub, said wind turbine further comprising a magnetically geared generator adapted for converting the mechanical energy into electrical energy, comprising: an inner winding unit having a first number of pole pairs;an outer winding unit arranged coaxially around the inner winding unit and having a second number of pole pairs; anda rotatable magnetic flux modulator arranged coaxially between the inner winding unit and the outer winding unit, whereinrotational input energy provided at the rotatable magnetic flux modulator is converted into electrical output energy provided as an alternating output current at one of the inner winding unit and the outer winding unit, whereinan output frequency of the alternating output current is controlled by communicating output energy as an alternating feedback current to the other one of the inner winding unit and the outer winding unit and by adjusting a feedback frequency of the alternating feedback current. 10. A method for converting mechanical energy into electrical energy, the method comprising providing an inner winding unit having a first number of pole pairs;providing an outer winding unit arranged coaxially around the inner winding unit and having a second number of pole pairs; androtating a rotatable magnetic flux modulator arranged coaxially between the inner winding unit and the outer winding unit, whereinrotational input energy provided at the rotatable magnetic flux modulator is converted into electrical output energy provided as an alternating output current at one of the inner winding unit and the outer winding unit, whereinan output frequency of the alternating output current is controlled by communicating output energy as an alternating feedback current to the other one of the inner winding unit and the outer winding unit and by adjusting a feedback frequency of the alternating feedback current.

이 특허에 인용된 특허 (34)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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