Four-stage motor

Abstract

The invention relates to a four-stage motor, and belongs to the technical field of motors. The motor comprises a shell, two pairs of magnetic poles, a rotor and at least two groups of brush assemblies; each pair of magnetic poles comprises an N pole and an S pole, the two pairs of magnetic poles are alternately arranged on the inner wall of the shell, the rotor is installed in the shell and located between the two pairs of magnetic poles, and a magnetic field is formed between every two adjacent magnetic poles; the rotor comprises a rotor shaft, an iron core, an enameled wire and a commutator; the iron core is installed on the rotor shaft and is provided with five windings, the commutator is installed at one end of the rotor shaft and is provided with commutator segments which are mutually insulated, and the enameled wire is wound on the windings according to a certain sequence and is in conductive contact with the commutator segments; when the five windings rotate, one winding is in a short circuit state, the other four windings alternate and have opposite current flow directions, and the winding in the short circuit state is located outside a magnetic field. The motor has the effect of being higher in torque.

Description

technical field [0001] The present application relates to the field of motors, in particular to a four-stage motor. Background technique [0002] With the development of the economy and the improvement of people's living standards, the use of electric tools in daily life has become more and more popular. With the continuous improvement of lithium battery capacity, in the field of low-power electric tools, DC electric tools are gradually replacing AC electric tools, and electric tools are gradually developing in the direction of portable and lightweight. [0003] Because of the lack of space and cost considerations, small DC motors often use a combined design of two pairs of magnets and a pair of carbon brushes. It is usually a two-stage four-winding DC motor, and the windings of this structure motor are arranged symmetrically in series. When developing a high-torque, low-speed motor, the parameters of the rotor armature will be enameled wire with a large wire diameter and ...

AI Technical Summary

Problems solved by technology

When developing a high-torque, low-speed motor, the parameters of the rotor armature will be enameled wire with a large wire diameter and a large number of turns; the winding and arranging of the rotor is difficult, and the effective utilization of the chip slot is low. If it is full, the wires cannot be arranged, and the enameled wires cannot be covered by the commutator ears, so there will be problems of low energy consumption and insufficient power.

[0004] DC power tools have introduced a four-pole DC motor in terms of high torque and high power consumption, which solves the problem of increasing the process of winding, spot welding and balancing in the production process. Difficulty, product quality cannot be effectively guaranteed

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