MOTOR WITH MAGNETIC SENSORS
First Claim
Patent Images
1. A method of operating an electric motor, the method comprising:
- providing an electric motor comprising;
a stator comprising a plurality of main poles, each of which comprises a coil,a rotor rotatable about an axis and comprising a magnet, which comprises a plurality of magnetic poles in which N and S poles are alternating,a first sensor group comprising a plurality of Hall effect sensors fixed relative to the stator, anda second sensor group comprising a plurality of Hall effect sensors fixed relative to the stator;
selecting the first sensor group so as to detect a rotor position relative to the stator with the first sensor group;
switching current flow of the coils based at least in part on the rotor position detected by the first sensor group so as to rotate the rotor in a first direction;
selecting the second sensor group so as to detect a rotor position relative to the stator with the second sensor group; and
switching the current flow of the coils based at least in part on the rotor position detected by the second sensor group so as to rotate the rotor in a second direction opposite to the first direction.
10 Assignments
0 Petitions
Accused Products
Abstract
Disclosed is an electric motor that includes a stator with a plurality of main poles, each of which includes a coil, and a rotor rotatable about an axis and having a magnet with magnetic poles in which N and S poles are alternating. The motor further includes a first sensor group of a plurality of magnetic sensors fixed relative to the stator, and a second sensor group of a plurality of magnetic sensors fixed relative to the stator. When operating the motor, the first sensor group can be selected so as to rotate the rotor in a first direction. The second sensor group can be selected so as to rotate the rotor in a second direction opposite to the first direction.
-
Citations
20 Claims
-
1. A method of operating an electric motor, the method comprising:
-
providing an electric motor comprising; a stator comprising a plurality of main poles, each of which comprises a coil, a rotor rotatable about an axis and comprising a magnet, which comprises a plurality of magnetic poles in which N and S poles are alternating, a first sensor group comprising a plurality of Hall effect sensors fixed relative to the stator, and a second sensor group comprising a plurality of Hall effect sensors fixed relative to the stator; selecting the first sensor group so as to detect a rotor position relative to the stator with the first sensor group; switching current flow of the coils based at least in part on the rotor position detected by the first sensor group so as to rotate the rotor in a first direction; selecting the second sensor group so as to detect a rotor position relative to the stator with the second sensor group; and switching the current flow of the coils based at least in part on the rotor position detected by the second sensor group so as to rotate the rotor in a second direction opposite to the first direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. A method of operating an electric motor, the method comprising:
-
providing an electric motor comprising; a stator comprising a plurality of main poles, each of which comprises a coil, a rotor rotatable about an axis and comprising a magnet, which comprises a plurality of magnetic poles in which N and S poles are alternating, a first sensor group comprising a plurality of magnetic sensors fixed relative to the stator, and a second sensor group comprising a plurality of magnetic sensors fixed relative to the stator; selecting the first sensor group so as to detect a rotor position relative to the stator; switching current flow of the coils based at least in part on the rotor position detected by the first sensor group so as to rotate the rotor in a first direction; selecting the second sensor group so as to detect a rotor position relative to the stator; and switching the current flow of the coils based at least in part on the rotor position detected by the second sensor group so as to rotate the rotor in a second direction opposite to the first direction.
-
-
20. An electric motor comprising:
-
a stator comprising a plurality of main poles, each of which comprises a coil; a rotor rotatable about an axis and comprising a magnet, which comprises a plurality of magnetic poles in which N and S poles are alternating; a first sensor group comprising a plurality of magnetic sensors fixed relative to the stator; a second sensor group comprising a plurality of magnetic effect sensors fixed relative to the stator; and an electric circuit configured to switch current flow of the coils based at least in part on the rotor'"'"'s position detected by the first sensor group so as to rotate the rotor in a first direction and further configured to switch the current flow of the coils based at least in part on the rotor position detected by the second sensor group so as to rotate the rotor in a second direction opposite to the first direction.
-
Specification