Hybrid Excitation Rotary Electric Machine

Abstract

The present invention relates to a hybrid excitation rotating electrical machine, which is provided with a rotor having a shaft extending and protruding in at least one axial direction in order to suppress iron loss generated when a magnetic flux is generated in a field coil that is excited by a magnetic pole not excited by a permanent magnet. , and the first and second cores, the first and second cores are divided in the axial direction by leaving gaps, and the first magnetic poles excited by the permanent magnets and the second magnetic poles not excited by the permanent magnets are arranged alternately along the circumferential direction. Magnetic poles, the polarities of the respective first magnetic poles are different from each other, and one of the first magnetic poles and the other of the second magnetic poles are arranged to face each other in the axial direction with the gap in between; the stator is arranged on the rotor. Radially outward, a rotating magnetic field for rotating the rotor is generated; an exciting coil is arranged in the gap to excite the second magnetic pole; and a third core is arranged in the first core and the second core. The radial inner side of the body and the field coil is formed of a material having a lower iron loss than the shaft.

Description

technical field [0001] The present invention relates to a hybrid excitation rotating electrical machine, and more particularly to a hybrid excitation rotating electrical machine using both permanent magnets and electromagnets as excitation circuits. Background technique [0002] Conventionally, a hybrid excitation rotating electrical machine including permanent magnets and electromagnets is known (for example, refer to Patent Documents 1 and 2). This rotating electrical machine includes a rotor, and a stator that is arranged radially outside of the rotor and generates a rotating magnetic field that rotates the rotor. The stator has a stator core and stator coils. In addition, the rotor has a shaft extending in the axial direction, and a first core body and a second core body divided in the axial direction. The first core and the second core each have permanent magnet field poles excited by the permanent magnets and non-excited permanent magnet non-field poles not excited b...

AI Technical Summary

Problems solved by technology

In the structure of these rotating electric machines, since the iron loss generated when the field coil generates magnetic flux increases, not only a large torque is generated, but also the size of the device itself is increased.

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