Flat wire motor winding in-groove structure with conductors with different thicknesses

Abstract

The invention provides a flat wire motor winding in-groove structure with conductors with different thicknesses. The structure can be used to reduce a skin effect and a motor copper loss, and has a high groove filling rate and high efficiency. A plurality of conductors are arranged in a wire groove in a radial direction of a motor. At least one conductor close to an air gap is composed of more than two layers of sub-conductors arranged in the radial direction of the motor. At least one conductor, far away from the air gap, is an integral layer in the radial direction of the motor, the thickness of each sub-conductor in the radial direction of the motor is smaller than that of the integral layer far away from the air gap, and a sectional area of each conductor composed of the sub-conductors, close to the air gap, is the same as that of the integral layer conductor far away from the air gap.

Description

technical field [0001] This patent relates to flat wire motor windings, specifically, the structure of the windings in wire slots. Background technique [0002] With the development of power motors, the use of flat section conductors in power motors has become a development trend. Flat wire motor windings are formed by connecting flat conductors (flat copper wires) that pass through the wire slots on the iron core at the ends protruding out of the wire slots. In the slot structure of the conventional flat wire motor winding, there are multiple flat copper wires with the same thickness in the wire slot along the radial direction of the motor. [0003] However, due to the large thickness of the flat copper wire, under the action of the high-frequency magnetic field of the motor, a more serious skin effect will occur, resulting in an increase in the AC resistance of the conductor, increasing the copper loss of the motor, and reducing the efficiency. In order to solve this One...

AI Technical Summary

Problems solved by technology

[0003] However, due to the large thickness of the flat copper wire, under the action of the high-frequency magnetic field of the motor, a more serious skin effect will be produced, resulting in an increase in the AC resistance of the conductor, which will increase the copper loss of the motor and reduce the efficiency. In order to solve this One problem, thinner flat wires can be used to make motor windings, but the windings made of thinner flat wires have more layers in the radial direction of the motor, and more insulating layers and conductor gaps reduce the slot fill rate.

Images