Electric motor with external rotor
First Claim
37. A belt conveyor comprising:
- a frame an idler roller rotatably mounted to the frame a drive roller mounted to the frame spaced from the idler roller, wherein the drive roller comprises an electric motor having a shaft defining a longitudinal axis and having opposing ends fixedly mounted to the frame;
a stator fixedly mounted to the shaft and having multiple windings capable of reversible current flow to alter the winding polarity; and
a rotor rotatably mounted to the shaft and comprising multiple magnets radially spaced about the periphery of the stator, with each of the magnets having at least one predetermined pole;
a controller coupled to the drive roller to control the direction of the current flow through the windings in such a manner to initiate and control the rotation of the rotator about the stator; and
an endless belt extending in tension around the idler roller and the rotator of the drive roller, whereby when current flows in the windings, the rotator will rotate about the longitudinal axis and urge the endless belt to move, and the controller will control the speed and direction of rotation.
2 Assignments
0 Petitions
Accused Products
Abstract
An electric motor comprises a shaft to which a stator is fixedly mounted and a rotor is rotatably mounted. The shaft defines a longitudinal axis having opposing ends that are fixedly mounted to a frame of a conveyor or a treadmill. The stator preferably comprises multiple windings capable of reversible current flow so that the winding polarity may be altered. The rotor comprises multiple magnets that are radially spaced about the periphery of the stator. Each of the magnets has at least one predetermined pole. A controller is coupled to the windings and controls the direction of the current flowing through the windings in such a manner to initiate and control the rotation of the rotor about the stator. Cooling fins are provided in an end cap mounted to the rotor.
-
Citations
55 Claims
-
37. A belt conveyor comprising:
-
a frame an idler roller rotatably mounted to the frame a drive roller mounted to the frame spaced from the idler roller, wherein the drive roller comprises an electric motor having a shaft defining a longitudinal axis and having opposing ends fixedly mounted to the frame;
a stator fixedly mounted to the shaft and having multiple windings capable of reversible current flow to alter the winding polarity; and
a rotor rotatably mounted to the shaft and comprising multiple magnets radially spaced about the periphery of the stator, with each of the magnets having at least one predetermined pole;
a controller coupled to the drive roller to control the direction of the current flow through the windings in such a manner to initiate and control the rotation of the rotator about the stator; and
an endless belt extending in tension around the idler roller and the rotator of the drive roller, whereby when current flows in the windings, the rotator will rotate about the longitudinal axis and urge the endless belt to move, and the controller will control the speed and direction of rotation. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44)
-
-
45. A treadmill comprising:
-
a frame an idler roller rotatably mounted to the frame a drive roller mounted to the frame spaced from the idler roller, wherein the drive roller comprises an electric motor having a shaft defining a longitudinal axis and having opposing ends fixedly mounted to the frame;
a stator fixedly mounted to the shaft and having multiple windings capable of reversible current flow to alter the winding polarity; and
a rotor rotatably mounted to the shaft and comprising multiple magnets radially spaced about the periphery of the stator, with each of the magnets having at least one predetermined pole;
a deck disposed between the drive roller and the idler roller;
a controller coupled to the drive roller to control the direction of the current flow through the windings in such a manner to initiate and control the rotation of the rotator about the stator; and
an endless belt extending in tension around the idler roller, over the deck, and around the rotator of the drive roller, whereby when current flows in the windings, the rotator will rotate about the longitudinal axis and urge the endless belt to move, and the controller will control the speed and direction of rotation. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52)
-
-
53. An electric motor comprising:
-
a shaft defining a longitudinal axis and having opposing ends adapted to be fixedly mounted to a structural support;
a stator fixedly mounted to the shaft and comprising multiple windings capable of reversible current flow to alter the winding polarity;
a rotor rotatably mounted to the shaft and comprising multiple magnets radially spaced about the periphery of the stator, with each of the magnets having at least one predetermined pole;
an end cap on the rotor having a plurality of fins disposed thereon; and
a controller coupled to the windings to control the direction of the current flow through the windings in such a manner to initiate and control the rotation of the rotator about the stator whereby when the rotator is rotating, the fins will transfer heat away from the rotor and the stator. - View Dependent Claims (54, 55)
-
Specification