A novel rotor structure of asynchronous starting permanent magnet synchronous motor
An asynchronous starting, permanent magnet synchronous technology, applied in the direction of synchronous machine, magnetic circuit shape/style/structure, electrical components, etc., can solve the problem that the starting torque is difficult to further increase, the air gap harmonic content is large, and the pull-in torque is small. and other problems, to achieve the effect of reducing the risk of irreversible demagnetization, reducing the harmonic content of the air gap, and increasing the area of the rotor slot.
Pending Publication Date: 2019-01-04
HARBIN UNIV OF SCI & TECH
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Problems solved by technology
[0003] The purpose of the present invention is to provide a new type of asynchronous start permanent magnet synchronous motor rotor structure, to solve the existing asynchronous start permanent magnet synchronous motor in the steady state operation, start and lead into the synchronization process, the air gap harmonic content is relatively large, and It is difficult to further increase the starting torque, and the pull-in torque is small, etc.
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[0009] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.
[0010] Refer to the attached figure 1 A novel asynchronous starting permanent magnet synchronous motor rotor structure, the rotor body includes a shaft, an iron core, permanent magnets, and squirrel cage windings; the permanent magnets are evenly distributed outside the iron core, and the squirrel cage windings are located in the rotor slots. The rotor slots are deep slots.
[0011] The rotor slots are evenly distributed inside the iron core, and the rotor slots include open convex slots and closed convex slots, and the closed convex slots are evenly distributed under the permanent magnets. The distance between the outermost side of the closed convex groove and the inner side of the permanent magnet is three to six centimeters.
[0012] By adopt...
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The invention relates to an asynchronous starting permanent magnet synchronous motor rotor structure, belonging to the motor structure technical field. The rotor body comprises a rotating shaft, an iron core, a permanent magnet and a squirrel cage winding; The permanent magnet is uniformly distributed on the outside of the iron core, the mouse cage winding is located in the rotor slot, and the rotor slot is a deep slot. The technical essentials are as follows: the permanent magnet is uniformly distributed on the outside of the iron core, the air gap harmonic content is reduced, and the efficiency is improved; Rotor groove is deep groove, The groove type of the rotor groove comprises an open convex groove and a closed convex groove, wherein the closed convex groove is uniformly distributedunder the permanent magnet, the starting resistance is increased, the leakage reactance of the rotor is reduced, thus the starting torque is increased, the area of the rotor groove is enlarged, and when the rotational speed of the motor is close to the synchronous rotational speed, the rotor resistance is small, so that the pulling torque is increased; The distance between the outermost side of the closed convex groove and the inner side of the permanent magnet is three to six centimeters, which reduces the risk of irreversible demagnetization of the permanent magnet during startup.
Description
technical field [0001] The invention relates to a rotor structure of an asynchronous start permanent magnet synchronous motor, belonging to the technical field of motor structures. Background technique [0002] Compared with induction motors, asynchronous start permanent magnet synchronous motors have the advantages of high power factor, high efficiency, wide economical operating range, light weight, etc., and are used to replace induction motors in some occasions. Oil machines, textile machines and other occasions have a wide range of applications. However, the ordinary asynchronous start permanent magnet synchronous motor has the problem of large air gap harmonic content, which makes it difficult to further improve the efficiency. In the occasions requiring large starting torque such as oil pumping units, the permanent magnets and squirrel cage windings of ordinary asynchronous starter permanent magnet synchronous motors are located inside the rotor core, and the competit...
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Login to View More IPC IPC(8): H02K21/46H02K1/27H02K1/26
CPCH02K21/46H02K1/26H02K1/27H02K2213/03
Inventor 魏静微张其江颜景博
Owner HARBIN UNIV OF SCI & TECH