Ring-shaped motor core
OwnerMitchell Roseinventor
Life of this patent
Estimating the term…
Abstract
An electrical machine comprises a magnetically permeable ring-shaped core centered on an axis of rotation and having two axially-opposite sides. Coils are wound toroidally about the core and disposed sequentially along the circumferential direction. Each coil includes two side legs extending radially alongside respectively sides of the core. Coil-free spaces exist between adjacent side legs. A bracket has first and second side flanges that are connected by a bridging structure and respectively abut the first and second sides of the coil.
Claims27
An electrical machine comprising:
- a magnetically permeable ring-shaped core centered on an axis of rotation and having two axially-opposite sides;
- coils wound toroidally about the core and disposed sequentially along a circumferential direction of the core, each coil including two side legs extending radially alongside respective sides of the core;
- coil-free spaces between adjacent side legs;
- and
- a bracket having first and second side flanges that are connected by a bridging structure and respectively abut the first and second sides of the coil.
An electrical machine comprising:
- a magnetically permeable core that is elongated to thereby define a lengthwise direction and a profile that is transverse to the lengthwise direction;
- coils wound about the core profile and sequentially disposed along the lengthwise direction;
- and
- a magnet adjacent to the core and movable relative to the core;
- the core including fragmented magnetically permeable material.
19 An electrical machine comprising:
- first and second magnetically permeable parallel cores, each core being elongated to thereby define a lengthwise direction and first and second core profiles transverse to the lengthwise direction;
- first coils wound about the first core profile and sequentially disposed along the length of the first core;
- second coils wound about the second core profile and sequentially disposed along the length of the second core;
- and
- a multi-pole elongated permanent magnet parallel with both cores and located between them, the magnet being movable, relative to the cores, in the lengthwise direction.
The machine of claim 19 wherein the lengthwise direction extends about an axis of rotation such that the elongated cores are ring-shaped and centered on the axis and the coils are toroidally wound about the cores and sequentially disposed about the axis.
The machine of claim 19 further comprising a second multi-pole elongated permanent magnet that is parallel with the first magnet, configured to move in unison with the first magnet, and located at the opposite side of the second core as the first magnet.
An electrical machine comprising:
- a magnetically permeable ring-shaped core centered on an axis of rotation;
- coils wound toroidally about the core and sequentially disposed along a circumferential direction of the core;
- and
- a multi-pole ring-shaped permanent magnet centered on the axis;
- the core and the magnet being disposed one about the other.
An method comprising:
- providing a ring-shaped permanent magnet centered on an axis and having radially inner and outer surfaces and opposite first and second side surfaces;
- overmolding a casing material about the magnet to yield a magnet assembly, the casing material located along the radially inner and outer surfaces and the first side surface;
- determining a boring location for the particular assembly by performing a balance test on the assembly;
- boring an axially-extending hole in the blank at the boring location;
- and
- securing a rotor shaft in the hole.
A method comprising:
- providing a ring-shaped permanent magnet having radially inner and outer surfaces and opposite first and second side surfaces;
- overmolding a casing material about the magnet to yield a magnet assembly, the casing material comprising a material that shrinks as it cools from a molten state, located along the radially and outer surfaces and the first side surface;
- and
- mounting the assembly about a rotor shaft.
Dependencies are inferred from the claim text.