Double-stator high-power-density flux switching permanent magnet motor

Abstract

The invention provides a double-stator high-power-density flux switching permanent magnet motor. The double-stator high-power-density flux switching permanent magnet motor comprises an outer stator, an inner stator and a rotor, and air gaps exist between the rotor and the stators. The rotor is composed of magnetic blocks, the magnetic blocks are evenly distributed in space and can be arranged at intervals or connected into a whole through connecting bridges; the outer stator is composed of U-type magnetic blocks, tangential magnetized permanent magnets and concentrated windings; every permanent magnet is clamped between the corresponding two neighboring U-type magnetic blocks, and the concentrated windings are arranged inside the grooves of the U-type magnetic blocks and house the permanent magnets; the neighboring permanent magnets magnetize alternately each other in the tangent direction; the radial axises of U-type magnetic blocks of the inner stator and the outer stator mutually coincide, and the magnetic teeth of the U-type magnetic blocks of the inner stator and the outer stator are opposite to each other; the magnetizing directions of the permanent magnets of the inner stator and the outer stator, which are identical in spatial position, are inverse, and the concentrated windings of the inner stator and the outer stator, which are identical in spatial position, are on the same phase. Compared with the prior art, the double-stator high-power-density flux switching permanent magnet motor omits rotor magnetic yokes, reduces the size of the rotor and the consumption of iron, improves the power density and the efficiency and can be applied to power systems such as wind power generation, electric vehicles and ships and warships.

Description

technical field [0001] The invention relates to a double-stator high-power-density magnetic flux switching permanent magnet motor, which belongs to the technical field of motor manufacturing. Background technique [0002] With the development of industry, permanent magnet motors have been widely used in wind power generation, electric vehicles, ships and other fields. In high-power drive and power generation systems, the volume of the motor is large. In order to increase the power density of the motor, enhance the power distribution capability of the system, and reduce costs, the motor can adopt a double-stator structure. Since the armature winding and the permanent magnet of the traditional permanent magnet synchronous motor are respectively placed in the stator or the rotor, when a double stator structure is adopted, the permanent magnet is generally placed in the rotor, and the rotor is placed in the middle of the double stator. This structure has the following disadvant...

AI Technical Summary

Problems solved by technology

This structure has the following disadvantages: First, because the permanent magnet is placed on the rotor, it is difficult to install the permanent magnet, and its structural reliability is poor in high-speed motion, and there is a risk of falling off; secondly, when the permanent magnet is placed on the rotor between the double stators, Permanent magnets are not easy to dissipate heat, and there is a risk of high temperature demagnetization

The double-stator structure obtained directly from the flux-switching motor has the common advantages of the double-stator motor and the flux-switching motor, but because the rotor is a salient pole structure, in the double-stator structure, the height of the teeth of the rotor and the height of the magnetic yoke The height is approximately twice that of the unilateral flux switching motor, so the motor has a large rotor inertia, large volume, large iron loss, low power density, and low efficiency

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