a DC motor

Abstract

The invention discloses a DC motor which consists of a static stator and a rotary rotor. The stator comprises a motor base, and three round pipe type polarity permanent magnets which are embedded and sleeved layer upon layer in the motor base, wherein the permanent magnet with the largest diameter at the outer layer is sleeved outside an upper permanent magnet and a lower permanent magnet at the middle layer, which have the same diameters but smaller than the diameter of the permanent magnet with the largest diameter at the outer layer and are connected by a magnetizer; the permanent magnet with the smallest diameter at the inner layer is sleeved in the middle layer of the upper permanent magnet and the lower permanent magnet, on which two armature shells are packed correspondingly; windings attach on two armature shells; and the magnetizer which connects the upper permanent magnet at the middle layer and the lower permanent magnet is also fixed on the armature shells; the two armature shells are connected with the same power output shaft; and the windings, the armature shells, the magnetizer and the power output shaft constitute a motor rotor. The DC motor does not include a reversing device which is wearable and has complex structure. The invention has low failure rate and easy maintenance, can avoid the occurrence of eddy current substantially, reduces the heat loss to a great extent when the DC motor operates at high speed, and significantly improves the efficiency of the motor.

Description

technical field [0001] The invention relates to a device for converting electrical energy into mechanical energy, specifically a DC motor. Background technique [0002] DC motors are one of the main types of electric motors and are widely used in fuel cell vehicles, electric motorcycles, cranes and other fields that require fast and frequent starting. A DC motor can be used as a generator or as a motor. It can be used as a DC generator to obtain a DC power supply. As a DC motor, because of its good speed regulation performance, it is used in many places that require high speed regulation performance. still widely used. [0003] After the armature winding on the rotor shaft of a traditional DC motor is energized, under the action of electromagnetic force, the armature winding and the armature core rotate in the stator magnetic field. The electromotive force current will hinder the rotation of the rotor shaft, and the alternating current will produce eddy current loss in the...

AI Technical Summary

Problems solved by technology

[0004] The DC motor disclosed in Chinese Patent 200320129546.4 "DC Motor" has a plurality of armature cores separated in the axial direction of the motor rotor, which reduces the volume of the armature core and reduces the eddy current loss and hysteresis loss of the armature core, but Its structure is complex and its manufacturing cost is relatively high

For the traditional brushed DC motor, its brushes are easy to wear and difficult to maintain; for the traditional brushless DC motor, it needs a complex commutation circuit to work, and the manufacturing cost is high

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