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БИБЛИОТЕКА ПАТЕНТОВ НА ИЗОБРЕТЕНИЯ

Electric machine (патент US № 8222787)

Официальная публикация
патента US № 8222787

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Классы МПК:H02K1/00 Элементы конструкции магнитной цепи
H02K3/00 Элементы конструкции обмоток
H02K19/26 ..отличающиеся по выполнению обмотки возбуждения 
H02K21/00 Синхронные двигатели и генераторы с постоянными магнитами
H02K21/12 .с неподвижным якорем и вращающимся магнитом 
H02K23/02 .отличающиеся по выполнению системы возбуждения 
Автор(ы):El-refaie, Ayman Mohamed Fawzi (Niskayuna, NY, US)
Reddy, Patel Bhageerath (Madison, WI, US)
Патентообладатель(и):General Electric Company (Niskayuna, NY, US)
Приоритеты:
подача заявки
01.04.2009
публикация патента
17.07.2012

РЕФЕРАТ (Abstract)

An interior permanent magnet electric machine is disclosed. The interior permanent magnet electric machine comprises a rotor comprising a plurality of radially placed magnets each having a proximal end and a distal end, wherein each magnet comprises a plurality of magnetic segments and at least one magnetic segment towards the distal end comprises a high resistivity magnetic material.

ФОРМУЛА ИЗОБРЕТЕНИЯ (CLAIMS)

What is claimed as new and desired to be protected by Letters Patent of the United States is:

1. An interior permanent magnet electric machine, said machine comprising: a rotor having a rotor shaft center and a circumference and comprising a plurality of radially placed magnets each aligned along a ray extending from the rotor shaft center toward the rotor circumference and having a proximal end closest the rotor shaft center and a distal end closest the rotor circumference, wherein each magnet comprises a plurality of magnetic segments and wherein a magnetic segment closest the distal end comprises a bonded magnetic material having a first electrical resistivity and a magnet segment closest the proximal end comprises a sintered magnetic material having a second electrical resistivity lower than the first electrical resistivity.

2. The interior permanent magnet electric machine of claim 1, wherein the magnets establish a magnetic flux field in a circumferential direction of the rotor.

3. The interior permanent magnet electric machine of claim 1, further comprising an electrical insulation disposed between adjacent magnetic segments.

4. The interior permanent magnet electric machine of claim 1, wherein at least one of the plurality of magnets comprises a plurality of contiguous magnetic segments, each comprising a sintered magnetic material.

5. The interior permanent magnet electric machine of claim 4, wherein a magnetic segment comprising sintered magnetic material has an electrical resistivity that lies within a range from about 1.2 microohm meter to about 1.6 microohm meter.

6. The interior permanent magnet electric machine of claim 1, wherein at least one of the plurality of magnets comprises a plurality of contiguous magnetic segments, each comprising a bonded magnetic material.

7. The interior permanent magnet electric machine of claim 6, wherein a magnetic segment comprising bonded magnetic material has an electrical resistivity of up to about 20 micro ohm meter.

8. The interior permanent magnet electric machine of claim 1, wherein the machine comprises a multi-phase machine.

9. The interior permanent magnet electric machine of claim 1, wherein each of the plurality of magnets independently comprise a permanent magnetic material.

10. The interior permanent magnet electric machine of claim 9, wherein the permanent magnetic material comprises a compound comprising a rare earth atom.

11. The interior permanent electric magnet machine of claim 9, wherein the permanent magnetic material comprises neodymium iron boron or samarium cobalt.

12. An interior permanent magnet machine, said machine comprising: a rotor having a rotor shaft center and a circumference and comprising a plurality of radially placed magnets each aligned along a ray extending from the rotor shaft center toward the rotor circumference and having a proximal end closest the rotor shaft center and a distal end closest the rotor circumference, wherein each magnet comprises a plurality of magnetic segments and wherein a magnetic segment closest the distal end comprises a bonded magnetic material having a first electrical resistivity and a magnet segment closest the proximal end comprises a sintered magnetic material having a second electrical resistivity lower than the first electrical resistivity; and a stator, wherein a magnetic flux field produced within the stator due to the plurality of magnets, is bidirectional.

13. The interior permanent magnet electric machine of claim 12, wherein the plurality of magnets each comprise a plurality of contiguous magnetic segments comprising a sintered magnetic material.

14. The interior permanent magnet electric machine of claim 13, wherein the plurality of magnets each further comprise a plurality of contiguous magnetic segments comprising a bonded magnetic material.

15. The interior permanent magnet electric machine of claim 12, further comprising an electrical insulation disposed between adjacent magnetic segments.


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