Star connected rotor
AssigneeJohnson Electric S.A.
InventorJames Ching Sik Lau
Life of this patent
Estimating the term…
Abstract
A star connected wound rotor has a shaft 12, a rotor core 14 fitted to the shaft, a commutator 16 fitted to the shaft adjacent one end of the rotor core and a star connector 18 fitted to the shaft adjacent the other end of the rotor core and a plurality of coils wound about the rotor core and connected to the commutator and the star connector, thereby forming a star connected rotor winding 20.
Claims14
A star connected wound rotor for a miniature electric motor comprising:
- a shaft;
- an armature core fitted to the shaft and having a plurality of armature poles;
- a commutator having a plurality of commutator segments for making sliding contact with a brush assembly, the commutator being fitted to the shaft adjacent a first end of the armature core;
- a star connector;
- and
- a plurality of coils forming an armature winding, each coil being wound around an armature pole and being terminated on a segment of the commutator and on the star connector,
- the star connector comprising a base of insulating material fitted to the shaft adjacent a second end of the armature core and a terminal ring of conductive material radially spring-fitted to the base and having a number of terminals connected to the coils, thereby forming a star connected armature winding.
A star connector for a wound rotor of a miniature electric motor comprising a base of insulating resin material and a terminal ring of conductive material radially spring-fitted to the base and having a number of terminals for connection of one end of each coil of the wound rotor.
A star connector for electrically connecting together lead wires from coils of a wound rotor of a miniature d.c. electric motor, the connector comprising:
- a base for direct mounting onto a shaft of the rotor;
- and
- a conductive ring having terminals for termination of the lead wires;
- wherein the base has a central boss portion with a central opening for receiving the shaft, a wall extending radially from the boss, a shirt extending axially from the radially outer edge of the wall, a number of openings extending axially through the skirt and a number of buttresses formed on the wall and the base remote from the skirt but adjacent the openings, and
- wherein the conductive ring has a flat ring portion located against the wall of the base and supported by the skirt and having a number of terminals extending radially from the ring portion, each terminal having an axially U-shaped portion, the terminals extending through the opening in the skirt with the U-shaped portions located radially adjacent the buttresses.
Dependencies are inferred from the claim text.