Actuator with coated stator and rotor modules
AssigneeMmt SA
InventorsGaël Andrieux, Pascal Thibaut, Gaëtan Riou
Life of this patent
Estimating the term…
Abstract
An electronic actuator is made up of a polyphase brushless motor comprising a rotor provided with permanent magnets and secured to an output shaft, and a stator supporting coils and providing the magnetic drive of the rotor, a first electrical connection assembly powering the coils, said stator being built into a stator module made up of a material which coats the wound stator as well as the first electrical connection assembly. The rotor is built into a rotor module made up of a flange coating a bearing that guides the shaft of the rotor. The stator module and the rotor module have elements for indexing and for attachment relative to one another.
Claims20
An electronic actuator comprising a polyphase brushless motor comprising:
- a rotor provided with permanent magnets and secured to an output shaft;
- a stator supporting coils and providing a magnetic drive of the rotor;
- a first electrical connection assembly powering the coils;
- the stator being part of a stator module including an over-molding material which encases the wound stator as well as the first electrical connection assembly;
- the rotor being part of a rotor module comprising a flange over-molding a bearing that guides the shaft of the rotor;
- the rotor module being a first component integrating the rotor, a guide and a flange;
- the stator module being a separate second component integrating the stator, and the first electrical connector assembly;
- and
- the stator module and the rotor module indexing and attaching relative to one another.
A method of manufacturing a magnetized rotor module comprising a flange enclosing a guide guiding an axis of a rotor for an actuator, the method comprising:
- over-molding a front guide to form the flange with positioning, and indexing pins or lugs, radially projecting outwardly from the rotor axis;
- assembling a stack of laminations on the rotor axis;
- bonding of magnet(s) of a motor on the stack of laminations;
- and
- assembling a rear guide on the axis comprising the stack of laminations.
Dependencies are inferred from the claim text.