Power motor with circumferential windings and new energy electromobile

Abstract

A power motor with circumferential windings is a switch reluctance type brushless motor composed of a stator, a rotor and an electronic control system; the rotor comprises three rotor magnetic poles as 436, 437 and 438 which are 120 degree from one another; the stator comprises a stator magnetic core and the circular circumferential windings; the stator magnetic core includes three circumferential grooves vertical to the axial and radial directions, and the circumferential windings 311, 312 and 313 are placed in the grooves respectively, three stator magnetic-pole pairs as 284, 285 and 286 are distributed uniformly at the two sides of notches in an aligned manner respectively, and magnetic pole distances between adjacent magnetic poles are as 287, 288 and 289. Stator sequential phase-splitting and rotor spatial phase-splitting are used, the motor serves as the switch reluctance type motor or power generator under control of the electronic power system, end-portion magnetic flux leakage and loss of traditional windings are overcome, the pole number of the motor is not limited by the windings, the phase number is easy to adjust, consumables are saved, temperature rise is reduced, the power and efficiency are improved, loss of a power supply cell is low, and the reliability is high.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a power motor with circumferential windings and a new energy electric vehicle. Background technique [0002] The motor is based on the law of electromagnetic induction to realize the conversion of electrical energy and mechanical energy, including motors and generators. Generally, motors are composed of stators, rotors and supporting components. Some motors also include electronic control units that control the current and phase sequence of the motor windings (commonly known as An electronic control system composed of controllers) and sensors. [0003] The stator of the motor includes a stator core and a stator winding. According to the magnetic circuit design of a general motor, the stator core is mostly a core with an axial slot structure, and the straight conductor part of the stator winding is placed in the slot, and the arc-shaped part of the stator winding There...

AI Technical Summary

Problems solved by technology

[0005] 1. There are more flux leakage at the end, the utilization rate of the magnetic field is reduced, and the power and efficiency of the motor are affected

[0006] 2. The magnetic flux leakage at the end leads to large eddy current loss in the metal parts near the end, and the temperature rise of the metal device is high. Some specific motors have to take corresponding cooling measures, which increases the cost and failure rate, and reduces the reliability of the motor. sex

[0007] 3. At the same time, the end produces resistive power consumption and generates heat, which increases the copper loss and temperature of the winding, and wastes energy

[0008] 4. The existence of the end makes the length of the winding longer and the amount of electromagnetic wire is larger, which increases the copper material and cost requirements

[0009] 5. The existence of the end also increases the volume and weight of the motor

[0010] 6. The structure of the magnetic core slot in the prior art makes it difficult to insert the winding wire, the winding and inserting process is more complicated, and the space at both ends of some motors is relatively narrow. rising costs

[0011] 7. In order to improve the slot full rate, the insulating paper or the insulating varnish layer used between the magnetic core and the winding, or between the winding and the winding is relatively thin, and the distance between the end of some motor windings and the shell or end cover is relatively close , These places are prone to extrusion, damage, etc., which lead to insulation layer breakdown, ground leakage and other problems

[0012] 8. Most of the general windings have an approximately elliptical structure, and the most effective straight conductor part is often bent, dislocated or cross-layer extrusion due to assembly process problems after being embedded in the slot. Similarly, cross-layer extrusion is also prone to occur at the end Phenomenon, which reduces the reliability of the insulation, is more prone to turn-to-turn, phase-to-phase short circuit or leakage, and increases the failure rate of the motor; the straight conductor part in the slot produces bending, misalignment or misalignment extrusion problems, which will also distort the magnetic field waveform. affect the performance of the motor

[0013] 9. The number of phases of the traditional axial slot embedded wire motor is fixed once the design scheme is determined and cannot be adjusted

[0014] Another important aspect is that the motors currently used in new energy electric vehicles include: AC motors, permanent magnet motors, switched reluctance motors, etc. These motors generally still use the traditional motor structure with end windings. The above-mentioned shortcomings have caused the development of electric vehicles to be largely restricted by the existing motor technology; under the current technical conditions of vehicle power batteries, in the face of increasingly stringent energy-saving and environmental protection technical indicators, how to improve the efficiency of the motor And the problem of improving the reliability of the motor has become a key technical bottleneck restricting the development of electric vehicles. Therefore, it is urgent to develop new motors with high efficiency, energy saving and high reliability.

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