Permanet magnet type rotary electric machine
A permanent magnet and rotor technology, applied to synchronous motors with stationary armatures and rotating magnets, magnetic circuit rotating parts, magnetic circuits, etc., can solve the problems of small cross-sectional area, hindering the insertion of armature windings, etc., to achieve Effects of reduced torque pulse, reduced harmonic components, and low vibration
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0023] Fig. 1 shows the radial cross-sectional shape of Embodiment 1 of the permanent magnet type rotating electrical machine according to the present invention, Fig. 2 shows the radial cross-sectional shape of the rotor according to Embodiment 1 of the present invention, and Fig. 3 is according to Embodiment 1 of the present invention Figure 4 shows the waveform of the induced electromotive force of the permanent magnet type rotating electrical machine according to the present invention; Figure 10 is a cross-sectional view of the structure of a comparative example of the permanent magnet type rotating electrical machine.
[0024] A permanent magnet type rotating electrical machine 1 includes a stator 2 and a rotor 3 . The stator 2 includes a stator core 6 including teeth 4 and a core back 5, and concentric armature windings 8 (three-phase windings including a U-phase winding 8A, a V-phase winding 8B, and a W-phase winding 8C). Arranged around the teeth 4 in the slots 7 betwee...
Embodiment 2
[0032] Fig. 5 is a cross-sectional view showing the outer peripheral shape of the rotor of Embodiment 2 of the permanent magnet type rotating electric machine according to the present invention.
[0033] As for the rotor in the drawings, similar parts to those in FIG. 3 are given similar reference numerals, and thus descriptions thereof are omitted. The difference between FIG. 5 and FIG. 3 is that the outer peripheral shape of the rotor core 12 is a combination of an arc concentric with the center O1 of the rotor 3 and an arc not concentric therewith. Specifically, the shape of the rotor is a combination of arcs around points O2, O3 different from the center O1 and an arc around the center O1. In order to make the outer peripheral shape of the rotor symmetrical with respect to the d axis at each magnetic pole, the radius r2 of the arc around the point O2 is equal to the radius r3 of the arc around the point O3, and the circumferential angle α2 of the arc around the point O2 is...
Embodiment 3
[0037] 6 is a cross-sectional view showing the outer peripheral shape of the rotor of Embodiment 3 of the permanent magnet type rotating electrical machine according to the present invention.
[0038] For the rotor in the drawings, components similar to those shown in FIG. 3 are given similar reference numerals, and descriptions thereof are omitted. The difference between FIG. 6 and FIG. 3 is that the outer peripheral shape of the rotor core 12 is a combination of elliptical arcs whose major axis is along the d-axis direction. In this structure, the radial distance from the center of the rotor 3 to the outer circumference of the rotor 3 still decreases gradually from the d-axis to the q-axis, and thus similar advantages to the embodiment shown in FIG. 3 can be obtained.
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More