Synchro motor of mixed exitation of tangential magnet steel possessing divided magnetic circuit

A hybrid excitation synchronous and synchronous motor technology, applied in synchronous motors with static armatures and rotating magnets, magnetic circuit rotating parts, magnetic circuit shape/style/structure, etc., can solve the problem of long axial magnetic circuit path, The magnetic circuit of the casing is saturated, and the volume and weight of the motor are reduced, so as to achieve the effect of small size, simple structure and shortening of the axial magnetic circuit.

CN1761131AInactive Publication Date: 2006-04-19NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2006-04-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The disclosed synchro motor includes stator and rotor. The stator is composed of case, armature core, armature winding. The rotor consists of shaft, pole shoe of N pole, pole shoe of S pole, and tangential magnetized permanent magnet. Character is that pole shoe of N pole, pole shoe of S pole are extended to same direction; and annular excitation bridge with excitation winding being embedded is setup between annular pole shoes at extended end of the pole shoes of rotor. Comparing with prior art, the invention possesses advantages of large magnetic density at air slot, high efficiency of electric excitation, short axial magnetic circuit etc. The disclosed synchro motor can be used as generator or motor, having high efficiency of permanent magnet motor, and controllable excitation of electric excitated motor. The invention is applicable to start up system and power generation system in aviation, spaceflight and vehicles as well as servo system in mechanical industry.
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Description

1. Technical field

[0001] The invention relates to a hybrid excitation synchronous motor. 2. Technical Background

[0002] Patent application number: 200510040412.6 The tangential magnetic steel hybrid excitation synchronous motor is based on the tangential magnetic steel synchronous motor, and the N-pole pole piece and the S-pole pole piece of the rotor are axially extended in opposite directions, corresponding to the rotor The extended magnetizer is provided with an excitation winding and a corresponding annular magnetic bridge structure on the stator. When the motor is not excited, the magnetic field under the main magnetic pole is in a state of weakening. The degree of field weakening can be adjusted by adjusting the length of the main air gap, the length of the additional air gap, the axial length of the main magnetic pole and the axial length of the excitation magnetic pole. Reduces the possibility of permanent magnets being demagnetized. However, the additional air...

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Embodiment Construction

[0022] Depend on figure 1 , figure 2 , image 3 , Figure 4 with Figure 5 It can be seen that the composition of the tangential magnet steel hybrid excitation synchronous motor of the present invention is composed of a tangential magnet steel permanent magnet synchronous motor on one side and an electric excitation part on the other side. That is, in the tangential structure permanent magnet synchronous motor composed of the stator composed of the armature core 2 and the armature winding 3 and the rotor equipped with the rotating shaft 9 and composed of the N-pole pole piece, the S-pole pole piece and the tangentially magnetized permanent magnet Basically, the N-pole shoe 5 and the S-pole shoe 6 of the rotor are directly extended to the same end respectively to form a image 3 structure. The N pole (or S pole) pole piece on the rotor expands in the shape of a trumpet. During the expansion process, it follows the principle of equal cross-section, and finally gathers into...