Axial gap type rotation motor

Abstract

The invention discloses an axial gap rotation motor of a big electromagnetic torque winding excitation structure axial gap type rotary motor which is obtained through high order spatial harmonic flux generated by an armature coil. The axial gap rotation motor (100) has: two rotord (120,130) which performs rotation driving with an axis (101) as a center and a stator (110), the two sides of which in an axial direction are opposite to the rotors; the axial gap rotation motor (100) comprises a plurality of armature coils (11) which are configured at the circumference of the axis of the stator, multiple induction coils (21) and multiple excitation coils (22) which are arranged on the circumference of the two rotors, and a diode which perform rectification on the induction current generated by the induction coils in order to provide the excitation coil; the windings of the armature coils, the induction coils and the excitation coil are winding coils which are wound into an alpha coil on an iron core (15,25) in an axial direction.

Description

technical field [0001] The present invention relates to an axial gap type rotating electrical machine utilizing winding excitation. Background technique [0002] In a rotating electrical machine, the rotor and the stator face each other across a gap. For example, the magnetic flux generated by the armature coil arranged on the stator side is interlinked on the rotor side to form a magnetic circuit, thereby obtaining a rotational force (reluctance torque). In order to assist this rotational force, permanent magnets and field windings (electromagnets) may be arranged to utilize electromagnetic torque. [0003] In such a rotating electrical machine, an axial type in which the stator and the rotor face each other in the axial direction has been proposed (Patent Document 1), and it has also been proposed to wind a strip-shaped wire as a winding around a core material on the stator side. A technical solution to form an armature coil (Patent Document 2). [0004] However, in the ...

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Problems solved by technology

[0004] However, in the permanent magnet, when the high-order space harmonic flux interlinks, it will generate heat due to the eddy current generated inside, the coercive force will decrease, and the magnetic force will become irreversibly smaller

Therefore, as described in Patent Document 1, for example, in a rotating electrical machine of the type in which permanent magnets are embedded on the rotor side where high-order spatial harmonic magnetic fluxes are interlinked, the magnetic force of the permanent magnets is reduced, and good driving cannot be achieved. question

[0005] In order to solve this problem, an expensive magnet with a high coercive force added with a large amount of heavy rare earths such as dysprosium (Dy) and terbium (Tb) was conceived, but the cost will increase

[0006] In addition, as described in Patent Document 2, in order to wind the strip-shaped wire around the core material, it is necessary to draw out the connection ends of the winding from the inner and outer sides of the winding coil, and if the core material is cut to secure a space for drawing out etc., the area through which the magnetic flux passes will become smaller, which will lead to a reduction in the driving efficiency of the rotating machine

In addition, when the strip-shaped wire is drawn out from the edge of the end surface of the core, a gap will be formed with the members located above and below the core, which hinders miniaturization.

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