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 rotor comprising:
a 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; and
a stator comprising:
a radial magnetic bearing static portion comprising:
three or more electromagnets, each electromagnet comprised by an electromagnet sector;
a first support plate adapted to support said electromagnet sectors;
a second support plate adapted to support said electromagnet sectors;
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;
a first annular circuit board adapted to accept a communicative connection from a network;
a second annular circuit board adapted to provide control signaling to said three or more pulse width modulated amplifiers;
a plurality of position sensors adapted to detect a radial position of said rotor, each of said plurality of position sensors located between a pair of three or more electromagnets;
a touchdown ring adapted to separate said rotor from said stator when no electrical energy is applied to said radial magnetic bearing; and
a thrust magnetic bearing static portion comprising:
two or more electromagnets;
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, each wedge volume radially disposed between a corresponding pair of said two or more electromagnets;
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 two or more pulse width modulated amplifiers.
2. A system comprising:
a stator comprising:
a first radial magnetic bearing static portion comprising:
three or more electromagnets, each electromagnet comprised by a modular electromagnet sector; 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.
3. The system of claim 2 , further comprising:
a junction box adapted to electrically couple said first radial magnetic bearing static portion to an energy source.
4. The system of claim 2 , further comprising:
a second radial magnetic bearing static portion.
5. The system of claim 2 , further comprising:
a first radial magnetic bearing rotating portion adapted to be magnetically coupled to said first radial magnetic bowing static portion.
6. The system of claim 2 , further comprising:
a first radial magnetic bearing rotating portion adapted to be magnetically coupled to said first radial magnetic bowing 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.
7. The system of claim 2 , further comprising:
a support plate adapted to support said three or more electromagnets.
8. The system of claim 2 , 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.
9. The system of claim 2 , further comprising:
an annular circuit board adapted to accept a communicative connection from a network.
10. The system of claim 2 , further comprising:
an annular circuit board adapted to provide control signaling to said three or more pulse width modulated amplifiers.
11. The system of claim 2 , 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.
12. The system of claim 2 , further comprising:
an annular circuit board adapted to accept a communicative connection from a network, said annular circuit board comprising a communications port.
13. The system of claim 2 , 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.
14. The system of claim 2 , 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.
15. The system of claim 2 , further comprising:
a touchdown ring adapted to separate a rotor from said stator when no power is applied to said first radial magnetic bearing.
16. The system of claim 2 , further comprising:
a thrust magnetic bearing static portion comprising two or more electromagnets.
17. The system of claim 2 , 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.
18. The method of claim 2 , 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.
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, each wedge volume radially disposed between a corresponding pair of said two or more electromagnets.
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, each electromagnet comprised by a modular electromagnet sector; 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.