Built-in type rotor magnetic pole structure for high-speed permanent magnet motor
A technology for permanent magnet motors and rotor poles, applied in the direction of magnetic circuit shape/style/structure, electromechanical devices, magnetic circuit rotating parts, etc., can solve problems such as low utilization rate of permanent magnets, poor mechanical strength of rotors, permanent magnet fractures, etc. , to achieve the effect of increasing the maximum safe operating speed, improving the tensile capacity and reducing the dosage
Inactive Publication Date: 2016-04-06
SHENYANG POLYTECHNIC UNIV
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[0005] Purpose of the invention: The present invention is a built-in rotor magnetic pole structure of a high-speed permanent magnet motor. The bending stress generated at the time is easy to cause the permanent magnet to break and other problems
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[0019] detailed description: The present invention is a built-in rotor magnetic pole structure of a high-speed permanent magnet motor. The technical idea of the present invention is to divide the permanent magnets of each pole of the built-in radial magnetic pole structure into multiple sections along the circumferential direction, so as to reduce the force arm of the centrifugal force distribution load of the rotor. length, to reduce the bending stress on the permanent magnets and magnetic isolation bridges; insert a dumbbell-shaped non-magnetic alloy steel as a reinforcement between each two permanent magnets to change the stress distribution of the rotor, so that the maximum stress point is transferred to the tensile strength The high non-magnetic alloy steel improves the mechanical strength of the rotor and the safety of high-speed operation; because the non-magnetic alloy is just a non-magnetic material, it eliminates the magnetic flux leakage between the poles after th...
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The invention discloses a built-in type rotor magnetic pole structure for a high-speed permanent magnet motor. The built-in type rotor magnetic pole structure comprises a rotor core adopting an uneven air gap structure, wherein the rotor core is formed by multiple rotor punching sheets that are provided with protruding outer edges and are stacked in sequence on the rotary shaft; multiple sections of permanent magnets in a circumferential direction and an accommodating space for dumbbell-shaped reinforced ribs made from non-magnetic alloy steel are punched on the upper surfaces of the rotor punching sheets; meanwhile, flux-insulating bridges and rivet holes are punched for inserting the multiple sections of permanent magnets in the circumferential direction into the rotor core; the dumbbell-shaped reinforced ribs made from non-magnetic alloy steel are inserted among the multiple sections of permanent magnets in each pole, and between the flux-insulating bridges of adjacent two magnetic poles; two-end baffles made from the non-magnetic materials cover along the rivet holes; and the overall structure is fixedly welded on a motor rotary shaft. The built-in type rotor magnetic pole structure for the high-speed permanent magnet motor provided by the invention is simple in process, reliable in mechanical performance, high in practicability, and can be widely applied to the high-speed permanent magnet motors; and in addition, the reliability and service life of the motor in high-speed operating are effectively improved, and the processing and manufacturing cost is lowered.
Description
technical field [0001] The invention relates to the technical field of electrical engineering, in particular to a built-in rotor magnetic pole structure of a high-speed permanent magnet motor. Background technique [0002] This patent is funded by the National 863 Project (2012AA061303) and the National Major Scientific Instrument and Equipment Development Project (2012YQ05024207). High-speed permanent magnet motors have the advantages of small size, high power density, fast response, wide speed range, and can directly drive high-speed loads. They can be used in aerospace, flywheel energy storage, precision instrument manufacturing and other fields. When a high-speed motor is running, its speed is above 10,000r / min. High speed will generate a huge centrifugal force inside the motor rotor, and the tensile strength of the permanent magnet material in the rotor is low, so the rational design of the magnetic pole structure is particularly important. [0003] At present, the pol...
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IPC IPC(8): H02K1/27
CPCH02K1/272H02K2201/00
Inventor 张炳义陈亚千冯桂宏
Owner SHENYANG POLYTECHNIC UNIV