Composite torque rotating electric machine

Patent metadata

Field	Value
Publication number	US-9806571-B2
Application number	US-201214404551-A
Country	US
Kind code	B2
Filing date	May 28, 2012
Priority date	May 28, 2012
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

A composite torque rotating electric machine includes a stator having armature windings arranged at multiple positions in a circumferential direction, a rotor having a cylindrical core, first permanent magnets arranged on axes (d) and in the circumferential direction on the outer periphery of the rotor, second permanent magnets arranged on axes (d) on the inner periphery side of the rotor across from the permanent magnets on the outer circumference side, third permanent magnets on axes (q) and extending in the longitudinally and radially of the rotor, and air gaps on the outer periphery side of the third permanent magnets and intermediate in the circumferential direction of the first permanent magnets. The radial distance between the first and second magnets is greater than the circumferential distance between the first permanent magnets and the air gaps. A rectifier having multiple slits is disposed between the first permanent magnets and the air gaps.

First claim

The invention claimed is:

1. A composite torque rotating electric machine comprising:
a stator in which armature windings are arranged at plural areas in the circumferential direction at regular intervals;
a rotor that is configured using a cylindrical iron core obtained by laminating magnetic steel sheets;
plural first permanent magnets that are provided on d-axes and that are arranged in the circumferential direction on the outer periphery of the rotor;
plural second permanent magnets that are provided on the d-axes and that are arranged on the inner periphery side of the rotor to face the first permanent magnets on the outer periphery side;
third permanent magnets that are provided on q-axes and that are stretched longitudinally in the radial direction in the rotor; and
air gap portions that are provided at a middle position between the plural first permanent magnets along the circumferential direction on the outer periphery side of the third permanent magnets, wherein
the distances in the radial direction between the first permanent magnets and the second permanent magnets are larger than the distances in the circumferential direction between the first permanent magnets and the air gap portions, and rectifying units configured using plural slits are provided between the first permanent magnets and the air gap portions,
a slit nearest the first permanent magnet has a greatest length of the plural slits, and
only one second permanent magnet is provided between two adjacent third permanent magnets.

2. The composite torque rotating electric machine according to claim 1 , wherein the intervals between the plural slits are longer on the inner periphery side than those on the outer periphery side.

3. The composite torque rotating electric machine according to claim 2 , wherein a first slit of the plural slits near the first permanent magnet is parallel to the q-axis, and a second slit nearest to the q-axis is parallel to the d-axis.

4. The composite torque rotating electric machine according to claim 3 , wherein slits provided between the first slit and the second slit are evenly positioned with respect to an intersection point of the central axis in the longitudinal direction of the first slit and the central axis in the longitudinal direction of the second slit.

5. The composite torque rotating electric machine according to claim 1 , wherein non-magnetic bodies are enclosed in the inside of the plural slits.

6. The composite torque rotating electric machine according to claim 1 , wherein the plural slits are arranged expanding toward the center of the rotor.

7. The composite torque rotating electric machine according to claim 6 , wherein slits provided between the first slit and the second slit are divided into equal angles at an intersection point as the center between the central axis in the longitudinal direction of the first slit and the central axis in the longitudinal direction of the second slit.

8. The composite torque rotating electric machine according to claim 1 , wherein the plural slits are extended in the radial direction along the magnetic flux passing between the q-axis and the d-axis.

Assignees

• Fujisawa Yukinari
• Yahara Masataka
• Nagase Hiroshi
• Tajima Fumio
• Yamaguchi Yoshihiro
• Aida Eng Ltd

Inventors

• Fujisawa Yukinari
• Yahara Masataka
• Nagase Hiroshi
• Tajima Fumio
• Yamaguchi Yoshihiro

Classifications

• H02K1/2766 Primary

  having a flux concentration effect · CPC title

• H02K1/2773 Primary

  consisting of tangentially magnetized radial magnets · CPC title