Linear motor with force ripple compensation
AssigneeSiemens Aktiengesellschaft
InventorsZeljko Jajtic, Christian Volmert
Life of this patent
Estimating the term…
Abstract
The invention relates to a primary component (2) for an electric motor (1), said primary component (2) being formed from at least one bundle of laminations (3) and comprises at least one flux guiding element (10) on one or both front faces (S1, S2) to reduce the ripple effect, said primary component (2) being separated from a secondary component (7) by a first air gap (δ1). The primary component (2) has at least one section (δ2) in the region of the flux guiding element (10), said section (δ2) being electrically non-conducting (Kel=0) and having a negligibly low magnetic permeability (μr≅1).
Claims12
A primary component for a linear motor, comprising:
- a magnetically conducting laminated core having teeth projecting towards a secondary component of the linear motor and encompassed by coils, and a magnetically conducting tooth without a coil arranged on an end region of the laminated core and having a free section projecting towards the secondary component of the linear motor and forming a flux guiding element for reducing force ripple, said free section formed in two pieces and comprising at least one plastic section having low electrical conductivity and a negligibly small magnetic conductivity and providing a defined gap with a defined gap spacing between the two pieces, said at least one plastic section arranged between the two pieces in a plane extending substantially perpendicular a projection direction of the free section, said teeth and the tooth without a coil being spaced apart from the secondary component by a first air gap.
A linear motor, comprising:
- a primary component including a magnetically conducting laminated core having teeth encompassed by coils and a magnetically conducting tooth without a coil arranged on an end region of the laminated core, said tooth without a coil comprising a free section extending parallel to the teeth encompassed by coils and forming a flux guiding element for reducing force ripple, said free section formed in two pieces and comprising at least one plastic section having low electrical conductivity and a negligibly small magnetic conductivity and providing a defined gap with a defined gap spacing between the two pieces, said at least one plastic section arranged between the two pieces in a plane extending substantially perpendicular a projection direction of the free section;
- and
- a secondary component spaced apart from the primary component by a first air gap.
Dependencies are inferred from the claim text.