Motor Having Non-Circular Stator

Patent metadata

Field	Value
Publication number	US-2021296946-A1
Application number	US-202117330707-A
Country	US
Kind code	A1
Filing date	May 26, 2021
Priority date	Feb 2, 2015
Publication date	Sep 23, 2021
Grant date	—

Abstract

An apparatus includes a motor having a rotor; and a stator, where the rotor is located at least partially in a rotor receiving area of the stator, where the stator includes at least one coil winding and teeth, where the at least one coil winding is located on at least some of the teeth, where the teeth include a first set of the teeth and a second set of the teeth, where the teeth of the first set of teeth are longer in a radial direction from the rotor receiving area than the teeth of the second set of teeth.

First claim

1 - 19 . (canceled)

20 . A motor comprising:
a rotor, where the rotor comprises a first top side member and a second bottom side member, where the first top side member and the second bottom side member are separate members which have substantial cone shapes orientated in opposite directions; and a stator, where the rotor is located at least partially in a rotor receiving area of the stator, where the stator comprises at least one coil winding and teeth, where the at least one coil winding is located on at least some of the teeth, where the teeth comprise a first set of the teeth and a second set of the teeth, where the teeth of the first set of teeth are longer in a radial direction from the rotor receiving area than the teeth of the second set of teeth, where a gap is provided between the stator and the rotor at the rotor receiving area, where the gap has a shape which is not uniformly cylindrical.

21 . The motor as claimed in claim 20 where the stator comprises a stator member forming the teeth, where a base of each of the teeth is located at a portion of the stator member which forms an outer perimeter wall of the stator member, and where the outer perimeter wall has a shape as one of a substantial oval shape, a substantial triangle shape, a substantial square shape, a substantial rectangle shape or a substantial polygon shape.

22 . The motor as in claim 20 where the stator comprises a stator member forming the teeth, where the stator member comprises at least one component receiving area spaced from the rotor receiving area, where the at least one component receiving area is sized and shaped to have a component movably located therein.

23 . The motor as in claim 22 where the at least one component receiving area has a center axis which is parallel to a center axis of the rotor receiving area.

24 . The motor as in claim 23 where the at least one component receiving area has an open side at a lateral side of a perimeter wall of the stator member.

25 . The motor as in claim 23 where the at least one component receiving area is substantially closed except at top and bottom sides of the stator member.

26 . The motor as in claim 20 where the teeth extend radially inward towards the rotor receiving area, and where the teeth are not located on two opposite sides of the rotor receiving area along arcs of about 40-100 degrees.

27 . The motor as in claim 20 where the at least one coil winding is located on the first set of teeth and not located on the second set of teeth.

28 . The motor as in claim 20 where the at least one coil winding is located on the first and second sets of teeth, and where the at least one coil winding comprises more winding turns on the first set of teeth than the second set of teeth and/or where the at least one coil winding comprises thicker wire on the first set of teeth than the second set of teeth.

29 . The motor as in claim 20 where at least some of the teeth taper in two orthogonal directions, where the stator comprises a stator member forming the teeth, an outer perimeter wall at outer ends of the teeth and respective shoes at inner ends of the teeth, where top and bottom sides of the teeth are recessed relative to top and bottom sides of the outer perimeter wall and the shoes.

30 . An apparatus comprising:
the motor as claimed in claim 20 ; a drive shaft extending from the rotor; and a robot arm connected to the drive shaft.

31 . A motor comprising:
a rotor; and a stator, where the rotor is located at least partially in a rotor receiving area of the stator, where the stator comprises at least one coil winding and a stator member forming teeth, where the at least one coil winding is located on at least some of the teeth, where the teeth comprise a first set of the teeth and a second set of the teeth, where the teeth of the first set of teeth are longer in a radial direction from the rotor receiving area than the teeth of the second set of teeth, where at least some of the teeth taper in two orthogonal directions, where the stator member forms an outer perimeter wall at outer ends of the teeth and shoes at inner ends of the teeth, where top and bottom sides of the teeth are recessed relative to top and bottom sides of the outer perimeter wall and the shoes, and the top and bottom sides of the outer perimeter wall and the shoes have a substantially same height.

32 . The motor as claimed in claim 31 where the outer perimeter wall has a shape as one of a substantial oval shape, a substantial triangle shape, a substantial square shape, a substantial rectangle shape or a substantial polygon shape.

33 . The motor as in claim 31 where the stator member comprises at least one component receiving area spaced from the rotor receiving area, where the at least one component receiving area is sized and shaped to have a component movably located therein.

34 . The motor as in claim 33 where the at least one component receiving area has a center axis which is parallel to a center axis of the rotor receiving area.

35 . The motor as in claim 34 where the at least one component receiving area has an open side at a lateral side of the perimeter wall of the stator member.

36 . The motor as in claim 34 where the at least one component receiving area is substantially closed except at top and bottom sides of the stator member.

37 . The motor as in claim 31 where the teeth extend radially inward towards the rotor receiving area, and where the teeth are not located on two opposite sides of the rotor receiving area along arcs of about 40-100 degrees.

38 . The motor as in claim 31 where the at least one coil winding is located on the first set of teeth and not located on the second set of teeth.

39 . The motor as in claim 31 where the at least one coil winding is located on the first and second sets of teeth, and where the at least one coil winding comprises more winding turns on the first set of teeth than the second set of teeth and/or where the at least one coil winding comprises thicker wire on the first set of teeth than the second set of teeth.

40 . The motor as in claim 31 where a gap is provided between the stator and the rotor at the rotor receiving area, where the gap has a shape which is not uniformly cylindrical.

41 . The motor as in claim 40 where the rotor comprises a first top side member and a second bottom side member, where the first top side member and the second bottom side member are separate members which have substantial cone shapes orientated in opposite directions.

42 . An apparatus comprising:
the motor as claimed in claim 31 ; a drive shaft extending from the rotor; and a robot arm connected to the drive shaft.

Assignees

• Persimmon Tech Corporation

Inventors

• Krishnasamy Jayaraman
• Hosek Martin
• Poole Dennis

Classifications

• H02K2213/03

  Machines characterised by numerical values, ranges, mathematical expressions or similar information · CPC title

• H02K2201/06

  Magnetic cores, or permanent magnets characterised by their skew · CPC title

• H02K7/06

  Means for converting reciprocating motion into rotary motion or vice versa · CPC title

• H02K1/165 Primary

  Shape, form or location of the slots · CPC title

• B25J9/126

  Rotary actuators · CPC title