COMPACT HIGH POWER ALTERNATOR
First Claim
1. A power conversion apparatus comprising:
- a shaft, a first stator, a second stator, a first rotor and a diametrically opposed second rotor, the shaft, stators, and rotor casings being coaxially disposed with the rotor casings mounted on the shaft, the first and second stators respectively including at least one winding;
wherein the first rotor further comprises a first plurality of permanent magnets coupled to the first rotor and disposed proximate to the first stator, separated from the first stator by a first predetermined gap distance, such that relative motion of the first stator and first rotor causes magnetic flux from the magnets to magnetically interact with the first stator winding;
wherein the second rotor further comprises a second plurality of permanent magnets coupled to the second rotor and disposed proximate to the second stator, separated from the second stator by a second predetermined gap distance, such that relative motion of the second stator and second rotor causes magnetic flux from the magnets to magnetically interact with the second stator winding; and
the respective first and second plurality of permanent magnets have a respective predetermined length beyond a respective predetermined first and second stator face lengths.
0 Assignments
0 Petitions
Accused Products
Abstract
An apparatus for converting between mechanical and electrical energy, particularly suited for use as a compact high power alternator for automotive use and “remove and replace” retrofitting of existing vehicles. Various aspects of the invention provide a means of significantly increasing the output of permanent magnet alternators while addressing the issues of radial loading applied to a permanent magnet alternator rotor. Another aspect of the invention allows for the production of power in two discrete voltages. An aspect of this invention allows for a marked increase in output capability without increasing axial length through the use of magnetic fringing. One aspect of the invention offers an effective means of mounting a skewed stack that eliminates or reduces cogging that is present in a permanent magnet machine without negatively impacting airflow. Another aspect of the invention reduces cogging by radially offsetting opposing magnets of a dual rotor permanent magnet machine.
-
Citations
49 Claims
-
1. A power conversion apparatus comprising:
-
a shaft, a first stator, a second stator, a first rotor and a diametrically opposed second rotor, the shaft, stators, and rotor casings being coaxially disposed with the rotor casings mounted on the shaft, the first and second stators respectively including at least one winding; wherein the first rotor further comprises a first plurality of permanent magnets coupled to the first rotor and disposed proximate to the first stator, separated from the first stator by a first predetermined gap distance, such that relative motion of the first stator and first rotor causes magnetic flux from the magnets to magnetically interact with the first stator winding; wherein the second rotor further comprises a second plurality of permanent magnets coupled to the second rotor and disposed proximate to the second stator, separated from the second stator by a second predetermined gap distance, such that relative motion of the second stator and second rotor causes magnetic flux from the magnets to magnetically interact with the second stator winding; and the respective first and second plurality of permanent magnets have a respective predetermined length beyond a respective predetermined first and second stator face lengths. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
-
-
47. A power conversion apparatus comprising:
-
a shaft, a first stator, a second stator, a first rotor and a diametrically opposed second rotor, the shaft, stators, and rotor casings being coaxially disposed with the rotor casings mounted on the shaft, the first and second stators including at least one winding; the first rotor including a first plurality of permanent magnets disposed proximate to the first stator, separated from the first stator by a predetermined gap distance, such that relative motion of the first stator and first rotor causes magnetic flux from the magnets to magnetically interact with the first stator winding; the second rotor including a second plurality of permanent magnets disposed proximate to the second stator, separated from the second stator by a predetermined gap distance, such that relative motion of the second rotor and second stator causes magnetic flux from the magnets to magnetically interact with the second stator winding, wherein the respective permanent first and second plurality of magnets have a predetermined length beyond a predetermined first and second stators individual face lengths; wherein the apparatus further comprises four lugs that couple the apparatus to a surface; wherein the disposition of at least one of the first and second stator slots and respective permanent magnets is skewed by a predetermined amount relative to the axis of the first and second stator; and wherein the first rotor and stator pairing and second rotor and stator pairing comprise independent output voltages. - View Dependent Claims (48, 49)
-
Specification