Electrical machine
AssigneeTeldix GmbH
InventorHeinz Wehde
Life of this patent
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Abstract
In an electrical machine including a rotor, a plurality of permanent magnets mounted on the rotor, a stator spaced from the rotor by an air gap, and electrical windings disposed on the stator to be traversed by the magnetic fields of the permanent magnets, the rotor is elastically or resiliently held relative to the stator by a rotor bearing, the stator includes a stator body made of an electrically nonconductive and nonmagnetizable material for preventing hysteresis losses, eddy current losses, and magnetic reaction forces on the rotor, and the permanent magnets, the windings and stator are arranged for causing the magnetic fields of the permanent magnets to pass through the air gap between rotor and stator, the windings, and the stator body.
Claims12
In an electrical machine including a rotor, a plurality of permanent magnets mounted on the rotor, a stator spaced from the rotor by an air gap, and electrical windings disposed on the stator to be traversed by the magnetic fields of the permanent magnets, the improvement comprising a rotor bearing including means elastically holding said rotor relative to said stator, and wherein said stator comprises a stator body carrying said windings and made of an electrically nonconductive and nonmagnetizable material for preventing hysteresis losses, eddy current losses, and magnetic reaction forces on said rotor, and said permanent magnets, said windings and said stator are arranged for causing the magnetic fields of said permanent magnets to pass through the air gap between rotor and stator, said windings, and said stator body, and further wherein each said winding is composed of at least one conductor constituted by a plurality of wires which are electrically insulated from one another and which are twisted together.
In an electrical machine including a rotor, a plurality of permanent magnets mounted on the rotor, a stator spaced from the rotor by an air gap, and electrical windings disposed on the stator to be traversed by the magnetic fields of the permanent magnets, the improvement comprising a rotor bearing including means elastically holding said rotor relative to said stator, and wherein said stator is provided with a cylindrical, axially-extending bore and said stator comprises a stator body made of an electrically nonconductive and nonmagnetizable material for preventing hysteresis losses, eddy current losses, and magnetic reaction forces on said rotor, and said permanent magnets, said windings and said stator are arranged for causing the magnetic fields of said permanent magnets to pass through the air gap between rotor and stator, said windings, and said stator body, and wherein said means elastically holding said rotor comprise:
- a cylindrical bearing bushing disposed in said bore;
- at least one ring of elastic material enclosing said bushing and holding said bushing in said bore;
- and a cylindrical, axially-disposed bearing pin fixed to, and supporting, said rotor and rotatably mounted in said bushing.
In an electrical machine including a rotor, a plurality of permanent magnets mounted on the rotor, a stator spaced from the rotor by an air gap, and electrical windings disposed on the stator to be traversed by the magnetic fields of the permanent magnets, the improvement comprising a rotor bearing including means elastically holding said rotor relative to said stator, and a driven component connected directly to, and integral with, said rotor and constituting a funnel-shaped spinning turbine of an open-end spinning machine, and wherein said stator comprises a stator body made of an electrically nonconductive and nonmagnetizable material for preventing hysteresis losses, eddy current losses, and magnetic reaction forces on said rotor, and said permanent magnets, said windings and said stator are arranged for causing the magnetic fields of said permanent magnets to pass through the air gap between rotor and stator, said windings, and said stator body.
Dependencies are inferred from the claim text.