18N-10N structure low-noise fractional slot concentrated winding permanent magnet motor

Abstract

The invention discloses a 18N-10N structure low-noise fractional slot concentrated winding permanent magnet motor. 18N stator teeth are uniformly distributed on a stator; a rotor has 10N poles, the stator teeth are wound with concentrated winding wire packages, and each three adjacent concentrated winding wire packages form one phase so as to form 2N groups of three-phase winding systems. In a fixed three-phase winding, in three adjacent concentrated winding wire packages of one phase, the middle one is A1, and two concentrated winding wire packages at both sides are reversely connected in series to form A2; and the other two phases are also defined to respectively obtain B1, B2, C1 and C2; after A2, B2 and C2 are connected into a triangle shape, a connection point of A2 and B2 is connected into C1, a connection point of B2 and C2 is connected into A1, and a connection point of C2 and A2 is connected into B1. According to the invention, not only is a winding factor guaranteed not to bechanged, but also content of tooth harmonic waves in a winding magnetomotive force in an air gap is reduced, so that vibration and noise of the motor and eddy current loss are reduced; and moreover,a reluctance torque under a magnetic field saturated working condition is improved.

Description

technical field [0001] The invention relates to the field of motors, in particular to an 18N-10N structure low-noise fractional slot concentrated winding permanent magnet motor. Background technique [0002] As the name implies, the fractional slot concentrated winding permanent magnet motor, that is, the number of slots per pole and each phase is a fraction, and the winding adopts a concentrated winding permanent magnet motor, which has high torque density, small cogging torque, strong fault tolerance, and end The advantage of small copper loss has broad application prospects in the fields of wind power generation, aircraft and ship electric propulsion, and electric vehicles. Compared with integer slot permanent magnet motors, the main advantages of fractional slot concentrated winding permanent magnet motors are as follows: [0003] 1) The length of the end is greatly shortened, which can effectively reduce copper weight and copper consumption, and improve efficiency and ...

AI Technical Summary

Problems solved by technology

However, this method will reduce the torque output capability of the motor or increase the amount of permanent magnets

Chinese patent application 201711442194.0 discloses a fractional slot concentrated winding permanent magnet synchronous motor and its design method for increasing reluctance torque. The rotor adopts a special magnetic barrier design to reduce the direct axis inductance and minimize the quadrature axis inductance The impact of the motor, and the sub-harmonic of the motor is significantly suppressed; however, although it increases the reluctance torque component, the total torque does not increase

[0013] Judging from the published patents, papers and other documents of concentrated winding permanent magnet motors, the solution to the high-speed noise problem of concentrated winding permanent magnet motors can be summarized as starting from the two aspects of the stator and the rotor, changing the slot shape of the stator, and adding additional teeth. Or change the rotor structure, these methods more or less solve the problem of vibration and noise of concentrated winding permanent magnet motors, the winding factor or the power density of the motor has not been improved or even reduced, and at the same time, the structure of the stator or rotor is accompanied by a complex structure

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