Magnetic bearing
View Patent ↗Certain exemplary embodiments comprise a system, which can comprise a radial magnetic bearing static portion. The radial magnetic bearing static portion can comprise a plurality of electromagnets. The radial magnetic bearing static portion can comprise a plurality of pulse width modulated amplifiers, each of which can be adapted to provide electrical energy to a corresponding electromagnet of the plurality of electromagnets.
1. A system comprising:
a stator comprising:
a first radial magnetic bearing static portion comprising:
three or more electromagnets; and
three or more pulse width modulated amplifiers, each adapted to provide electrical energy to a corresponding electromagnet of said three or more electromagnets, each of said three or more pulse width modulated amplifiers comprised by a corresponding wedge volume, each wedge volume radially disposed between a pair of said three or more electromagnets.
2. The system of claim 1 , further comprising:
a junction box adapted to electrically couple said first radial magnetic bearing static portion to an energy source.
3. The system of claim 1 , further comprising:
a second radial magnetic bearing static portion.
4. The system of claim 1 , further comprising:
a first radial magnetic bearing rotating portion adapted to be magnetically coupled to said first radial magnetic bearing static portion.
5. The system of claim 1 , further comprising:
a first radial magnetic bearing rotating portion adapted to be magnetically coupled to said first radial magnetic bearing static portion, said first radial magnetic bearing rotating portion comprising:
a hub;
a plurality of laminations;
a sensor target ring;
a first touchdown journal; and
a second touchdown journal.
6. The system of claim 1 , further comprising:
a support plate adapted to support said three or more electromagnets.
7. The system of claim 1 , further comprising:
a first support plate adapted to support said three or more electromagnets; and
a second support plate adapted to support said three or more electromagnets.
8. The system of claim 1 , further comprising:
an annular circuit board adapted to accept a communicative connection from a network.
9. The system of claim 1 , further comprising:
an annular circuit board adapted to provide control signaling to said three or more pulse width modulated amplifiers.
10. The system of claim 1 , further comprising:
a first annular circuit board adapted to accept a communicative connection from a network; and
a second annular circuit board adapted to provide control signaling to said three or more pulse width modulated amplifiers.
11. The system of claim 1 , further comprising:
an annular circuit board adapted to accept a communicative connection from a network, said annular circuit board comprising a communications port.
12. The system of claim 1 , further comprising:
a plurality of position sensors adapted to detect a radial position of a rotor associated with said stator, each of said plurality of sensors located between a corresponding pair of said three or more electromagnets.
13. The system of claim 1 , further comprising:
a plurality of position sensors adapted to detect a radial position of a rotor associated with said stator, each of said plurality of sensors located between a corresponding pair of said three or more electromagnets, wherein said plurality of sensors comprises eight sensors, each offset by approximately 45 degrees.
14. The system of claim 1 , further comprising:
a touchdown ring adapted to separate a rotor from said stator when no power is applied to said first radial magnetic bearing.
15. The system of claim 1 , further comprising:
a thrust magnetic bearing static portion comprising two or more electromagnets.
16. The system of claim 1 , wherein:
an air gap between a rotating portion of a magnetic bearing comprising said magnetic bearing static portion and said magnetic bearing static portion is less than approximately 0.020 inches.
17. The method of claim 1 , wherein:
a gap defined between a first touchdown ring of a magnetic bearing comprising said magnetic bearing static portion and a rotating portion of said magnetic bearing is less than approximately 0.010 inches.
18. A system comprising:
a stator comprising:
a radial magnetic bearing static portion comprising:
three or more electromagnets, each electromagnet comprised by a modular electromagnet sector; and
an annular circuit board adapted to accept a communicative connection from a network, said annular circuit board adapted to communicate information regarding said radial magnetic bearing static portion via said network, said annular circuit board adapted to provide control signaling to two or more pulse width modulated amplifiers, said amplifiers adapted to provide electrical energy to a corresponding electromagnet of said three or more electromagnets.
19. A system comprising:
a stator comprising:
a thrust magnetic bearing static portion comprising:
two or more electromagnets, each electromagnet comprised by a modular electromagnet sector; and
two or more pulse width modulated amplifiers, each adapted to provide electrical energy to a corresponding electromagnet of said two or more electromagnets, each of said two or more pulse width modulated amplifiers comprised by a corresponding wedge volume.
20. A system comprising:
a stator comprising:
a support plate adapted to transfer greater than fifty percent of heat provided from an axial face of said stator, said heat generated by components comprising:
three or more electromagnets comprised by a radial magnetic bearing static portion; and
three or more pulse width modulated amplifiers, each adapted to provide electrical energy to a corresponding electromagnet of said two or more electromagnets, each of said two or more pulse width modulated amplifiers comprised by a corresponding wedge volume, each wedge volume radially disposed between a corresponding pair of said two or more electromagnets.