Induction Reel Motor
An induction motor system for a reel assembly of a turf maintenance vehicle includes a frame and a turf maintenance implement assembly defining a reel assembly movably connected to the frame. The reel assembly includes multiple reel blades defining a reel blade assembly. The reel blade assembly is rotatably connected to a structure of the reel assembly. Multiple induction coils are connected to the structure of the reel assembly and energized to create a magnetic field through the reel blades of the reel blade assembly thereby inducing rotation of the reel blade assembly.
1 . An induction motor system for a reel assembly, comprising:
a reel blade assembly including multiple reel blades, the reel blade assembly rotatably connected to a structure of a reel assembly; and
at least one linear induction coil connected to the reel assembly energized to create a magnetic field through the reel blades thereby inducing rotation of the reel blade assembly.
2 . The induction motor system for a reel assembly of claim 1 , wherein the at least one linear induction coil is supported by a cross member of the reel assembly.
3 . The induction motor system for a reel assembly of claim 2 , wherein the at least one linear induction coil operates using 3 phase electrical power.
4 . The induction motor system for a reel assembly of claim 3 , wherein the electrical power is provided to the at least one linear induction coil via a power lead connected to generator of a turf maintenance vehicle.
5 . The induction motor system for a reel assembly of claim 1 , wherein the at least one linear induction coil includes a curved inner surface which mimics a curvature of the reel blades at an outer perimeter of the reel blades.
6 . The induction motor system for a reel assembly of claim 5 , wherein a predetermined spacing is maintained between the inner surface of the at least one linear induction coil and an outer edge of the reel blades defining the outer perimeter.
7 . The induction motor system for a reel assembly of claim 6 , wherein the predetermined spacing is approximately 0.25 in or less.
8 . The induction motor system for a reel assembly of claim 1 , wherein the at least one linear induction coil includes multiple linear induction coils.
9 . The induction motor system for a reel assembly of claim 8 , wherein:
a length of any of the linear induction coils is equal; and
a constant separation distance is maintained between any two successive ones of the multiple linear induction coils.
10 . The induction motor system for a reel assembly of claim 1 , wherein the reel blades are connected to a shaft having opposed first and second bearing ends each passively rotatably seated in a journal member connected to the reel assembly.
11 . An induction motor system for a reel assembly, comprising:
a reel blade assembly including multiple reel blades, the reel blade assembly rotatably connected to a structure of a reel assembly; and
multiple linear induction coils connected to a member of the reel assembly and energized to create a magnetic field through the reel blades thereby inducing rotation of the reel blade assembly; and
each of the induction coils includes a curved inner surface which mimics a curvature of the reel blades at an outer perimeter of the reel blades.
12 . The induction motor system for a reel assembly of claim 11 , wherein the linear induction coils are sequentially rotationally staggered to equal a pitch of the individual reel blades.
13 . The induction motor system for a reel assembly of claim 11 , wherein the linear induction coils are each semi-circular shaped.
14 . The induction motor system for a reel assembly of claim 11 , wherein a spacing is maintained for an entire surface area defined by the curved inner surface with respect to the outer perimeter.
15 . The induction motor system for a reel assembly of claim 11 , wherein a thickness of each of the linear induction coils is substantially constant throughout a length of each of the linear induction coils.
16 . The induction motor system for a reel assembly of claim 11 , wherein each of the linear induction coils defines an arc having an angle determined with respect to a longitudinal axis of the reel blade assembly.
17 . The induction motor system for a reel assembly of claim 11 , wherein the arc of each of the linear induction coils is constant.
18 . An induction motor system for a reel assembly of a turf maintenance vehicle, comprising:
a frame,
a turf maintenance implement assembly defining a reel assembly movably connected to the frame;
the reel assembly including multiple reel blades defining a reel blade assembly, the reel blade assembly rotatably connected to a structure of the reel assembly; and
multiple induction coils connected to the structure of the reel assembly and energized to create a magnetic field through the reel blades of the reel blade assembly thereby inducing rotation of the reel blade assembly.
19 . The induction motor system for a reel assembly of a turf maintenance vehicle of claim 18 , further including a generator providing electrical power to operate the induction coils.
20 . The induction motor system for a reel assembly of a turf maintenance vehicle of claim 19 , wherein the generator produces 3-phase electrical power.
21 . The induction motor system for a reel assembly of a turf maintenance vehicle of claim 18 , wherein each of the induction coils includes a curved inner surface which mimics a curvature of the reel blades at an outer perimeter of the reel blades.
22 . The induction motor system for a reel assembly of a turf maintenance vehicle of claim 21 , further including a predetermined spacing maintained between the inner surface of each of the induction coils and an outer edge of the reel blades defining the outer perimeter.
23 . A method for operating a reel assembly of a turf maintenance vehicle, the reel blade assembly including multiple reel blades, the method comprising:
rotatably connecting the reel blade assembly to a structure of a reel assembly; and
connecting a linear induction coil to the reel assembly; and
energizing the linear induction coil thereby creating a magnetic field through the reel blades to induce rotation of the reel blade assembly.
24 . The method of claim 23 , further comprising connecting the linear induction coil to a generator providing 3-phase electrical power.
25 . The method of claim 23 , further comprising maintaining a predetermined spacing between an inner surface of the linear induction coil and an outer edge of the reel blades.