Permanent-magnet synchronous motor adopting concentrated winding

Abstract

The invention provides a permanent-magnet synchronous motor adopting a concentrated winding, comprising a stator and a rotor. An air gap is formed between the stator and the rotor, the stator comprises a stator core and a stator winding, and the rotor comprises a rotor core, a rotating shaft and a permanent-magnet steel magnet. The permanent-magnet synchronous motor is characterized in that that stator winding is an integrated winding, the rotor is an eccentric rotor, and the air gap between the stator and the rotor is an uneven air gap. The invention has the advantages of less materials consumption, simple structure, convenient production and light weight, reduces the additional loss of motor energy and improves the utilization rate of the motor energy.

Description

Technical field [0001] The invention relates to an AC synchronous motor, in particular to a permanent magnet synchronous motor adopting concentrated winding. Background technique [0002] The air gap between the stator and the rotor of the traditional permanent magnet synchronous motor is uniform, and the stator winding adopts distributed winding to make the air gap magnetic flux of the motor closer to the sinusoidal distribution. [0003] The permanent magnet rotor commonly used in traditional permanent magnet synchronous motors has roughly five shapes, as shown in Figure 1. The permanent magnets shown in Figure 1 (a), (b), and (c) are magnetized in a radial direction. The permanent magnets are attached to the surface of the rotor. The direct-axis reactance and quadrature-axis reactance of the rotor are equal, similar to a hidden pole motor Figure 1(d) shows that although the permanent magnet is magnetized radially, the permanent magnet is located inside the rotor. Between the ou...

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Problems solved by technology

[0004] In the traditional permanent magnet synchronous motor, the permanent magnet synchronous motor with the rotor shown in Figure 1 (a), (b), (c) has a large weight and a large moment of inertia, and the direct axis of the permanent magnet synchronous motor rotor The reactance and the quadrature axis reactance are equal, and its essence is the sedentary pole motor. The electromagnetic power and electromagnetic torque of the common permanent magnet synchronous motor are small; the direct axis reactance and AC of the permanent magnet synchronous motor with the rotor shown in Fig. The shaft reactance is not equal, it belongs to the salient pole motor, and it also has high electromagnetic power. However, in order to make the air gap flux closer to the sinusoidal distribution, the stator needs to use distributed windings. The use of distributed windings has the following disadvantages: (1) The ends of distributed windings are long and waste a lot of copper (2) The leakage reactance of distributed windings is large (3) It is difficult to offline and the structure of distributed windings is complex

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