Series excited machine with improved rotor assembly

Abstract

The invention discloses a series excited motor with an improved rotor assembly. The motor comprises a rotor assembly, wherein the rotor assembly comprises a rotor core, a commutator, an electric brushmounting plate and a motor rear bracket which are sequentially arranged from top to bottom, the electric brush mounting plate is provided with a plurality of electric brushes distributed in an axis array, and each electric brush is respectively in friction contact fit with the commutator; at least four groups of rotor enameled wires are wound on the rotor iron core, the outer diameter d1 of the rotor iron core is 40-150mm, four groups of rotor enameled wires are respectively wound on the corresponding winding grooves, the number of the winding grooves of each rotor enameled wire is 16, and the number of the cross grooves of the rotor enameled wires is 4; an insulating part is arranged between the electric brush mounting plate and the motor rear bracket. The assembly invention improves themounting structure of the upper part of the commutator and the rotor core, and improves the mounting structure of the lower part of the commutator and the brush part so as to maximize the overall height of the rotor assembly.

Description

technical field [0001] The invention relates to the technical field of series excitation, in particular to a series excitation motor with an improved rotor assembly. Background technique [0002] The rotor part of the motor is a conversion device used by the series motor to convert electrical energy into electrical energy. The rotor part of the motor mainly includes a rotor core, a commutator and multiple sets of rotor enameled wires. A set of rotor enameled wires corresponds to a pair of magnetic poles in the stator part of the motor. [0003] The stator core of the traditional series motor is 2 poles, the outer diameter and bottom diameter of the rotor core are both small, the bottom diameter of the rotor core is generally 15-25mm, and the corresponding number of winding slots of the rotor core Generally, it is 10 slots or 12 slots, that is, the number of slots corresponding to the rotor enameled wire is 5 slots or 6 slots. This winding process is full-pitch winding, that ...

AI Technical Summary

Problems solved by technology

[0004] Secondly, in the existing series motors, the brushes are usually embedded in the position of the supporting feet of the bracket, but this design is not convenient for the installation of the brush box, or the brushes are installed in two adjacent boxes for international safety standards. Between the enameled wires of the stator, and the distance between the brush box and the rear bracket of the motor is generally at least 3m. Such a brush installation structure makes the commutator unable to be pressed down for installation, and the distance between the lower part of the commutator and the rear bracket of the motor is far away.

[0005] In summary, the height of the rotor assembly formed by the above installation structure is generally more than 50mm. The height of such a motor is high, and the finished product of the terminal home appliance will also be large, which does not meet the needs of miniaturization of home appliance motors on the market. Therefore, it is necessary be improved

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