摘要:
The invention relates to a permanently-excited electrical machine with a stator and a rotor. The stator has a coil arrangement and the rotor is provided with permanent magnet elements, or the rotor comprises a coil arrangement and the stator is provided with permanent magnet elements. An air gap is formed between the stator and the rotor, which is defined by the permanent magnet elements and magnetically conductive teeth of the stator, which are aligned with these in certain positions. The coil arrangement comprises at least one hollow cylindrical winding which is at least partially accommodated in the stator. The rotor has a magnetic return on the sides of the permanent magnet elements, which are remote from the air gap. The magnetic return is formed of rings which are oriented in the circumferential direction of the rotor, and which in the axial direction of the rotor are not wider than individual ones of the permanent magnet elements. Electrically/magnetically effective short-circuit coils are arranged between neighbouring permanent magnet elements in the axial direction of the electrical machine and/or neighbouring magnetic return rings in the axial direction.
摘要:
The present invention relates to a method for mounting magnet elements on the surface of a rotor for use in a permanent magnet motor. The method comprises the steps of : providing a first tube like element, wherein said first tube like element has an inner diameter that corresponds to an outer diameter of said rotor, providing a second tube like element, wherein said second tube like element has an inner diameter that is larger than an outer diameter of said first tube like element, inserting said first tube like element into said second tube like element, in order to create a hollow space between them, inserting a number of magnet elements into said hollow space, and inserting said rotor into said first tube like element, whereupon said magnet elements are in a tight fit arrangement between said first tube like element and said second tube like element.
摘要:
An inner sleeve, having threads on each end, is formed on a motor or generator rotor. A pair of stub shafts are threadably attached to the inner sleeve at each end and a magnet is placed in between. The stub shafts are turned on the inner sleeve to bring them together, thereby creating an axial compressive force on the magnet. By keeping the magnet in a compressive state at all times, cracking of the magnet is prevented, thus keeping the rotor stable during use of the motor or generator. An outer sleeve is shrunk-fit around the magnet and stub shafts to provide a further radial force on the rotor. The magnet assembly of the present invention also enlarges the required radial shrink-fit tolerance of the outer sleeve on the magnet, thereby reducing costs conventionally required to match the outer sleeve to the magnet within close tolerances.
摘要:
A motor employing vector motion principles to Convert magnetic forces into rotary motion has a rotor with a shaft and a plurality of magnets connected to the shaft by bent supports having a particular bend angle. The rotor is positioned within a stator having a plurality of stator magnets opposing the rotor magnets. Magnetic force, such as a repelling or attracting force between the rotor and stator is formed in a non-radial direction due to the orientation of the rotor magnets mounted on bent supports and their opposing stator magnets. One segment of the bent support receives an action force from the magnetic force between the stator magnet and the rotor magnet. Another segment of the bent support exhibits a reaction force opposing the action force. The vectors of the action force and the reaction force combine into a resultant vector having a direction that induces rotor rotation.
摘要:
A motor employing vector motion principles to convert magnetic forces into rotary motion has a rotor with a shaft and a plurality of magnets connected to the shaft by bent supports having a particular bend angle. The rotor is positioned within a stator having a plurality of stator magnets opposing the rotor magnets. Magnetic force, such as a repelling or attracting force between the rotor and stator is formed in a non-radial direction due to the orientation of the rotor magnets mounted on bent supports and their opposing stator magnets. One segment of the bent support receives an action force from the magnetic force between the stator magnet and the rotor magnet. Another segment of the bent support exhibits a reaction force opposing the action force. The vectors of the action force and the reaction force combine into a resultant vector having a direction that induces rotor rotation.
摘要:
A shaft for a motor-driven spindle including an elongate section made of a reinforced plastic material and a rotor arranged around the elongate section and surrounded by reinforced plastic material. The rotor may be wound by the reinforced plastic material and if it includes grooves on an outer circumference, the reinforced plastic material is wound into the grooves. A faceted wheel may be provided on the shaft and include reflective surfaces on an outer circumference thereof. The shaft is arranged in a housing of the motor-driven spindle.
摘要:
A two pole permanent magnet rotor utilizes a single cylindrical two pole permanet magnet mounted between two end pieces and surrounded by a retaining hoop. The cylindrical two pole permanent magnet, which is made of high energy product material, is "straight through" diametrically magnetized to provide a sinusoidal air gap flux distribution which eliminates losses due to harmonics. The cylindrical two pole permanent magnet may be made of a plurality of smaller magnet blocks which are stacked and machined to form a cylindrical configuration.
摘要:
Halbach array of magnetically isotropic electromagnets, comprised of loosely-wound, spring-like nested electromagnetic coils, wound and arranged in close proximity in Halbach array sequence, encased in various combinations of powered magnetic metal composite and binder, formed, wired, and assembled to serve as a stator and/or rotor of an electric motor or generator.
摘要:
Halbach array of magnetically isotropic electromagnets, comprised of loosely-wound, spring-like nested electromagnetic coils, wound and arranged in close proximity in Halbach array sequence, encased in various combinations of powdered magnetic metal composite and binder, formed, wired, and assembled to serve as a stater and/or rotor of an electric motor or generator.
摘要:
A rotor sleeve (46) for a rotor (29) of an electric machine (28). The sleeve comprises a plurality of layers (66a, 66b) of carbon fibre reinforced polymer,
each layer (66a, 66b) comprising fibres (68) oriented substantially 90° to a rotational axis (X) and at least one layer (72a) of fibres (74) having a lower modulus of elasticity provided between layers (66a, 66b) of carbon fibre reinforced polymer. The lower modulus of elasticity fibres (74) are oriented between 50° and 75° relative to the rotational axis (X).