Low-speed large-torque permanent magnet brushless motor

Abstract

The invention discloses a low-speed large-torque permanent magnet brushless motor, and belongs to the technical field of a permanent magnet brushless motor. According to the main technical points, the low-speed large-torque permanent magnet brushless motor comprises a shell, wherein two mutual-corresponding stator electric magnets are arranged inside the shell along the circumference direction; each stator electric magnet consists of a coil base and an extending base connected with the coil base; the end face of each extending base, which is far from the coil base, is an arc face; the radian of each arc face is 130-160 degrees; a coiling space is formed inside the shell at the both sides of the coil base; a rotor is arranged on the shell between the two arc faces; two arc permanent magnets corresponding to the stator electric magnets are distributed on the rotor along the circumference direction; and the radian of each permanent magnet is 175-177.5 degrees. The invention aims to provide the low-speed large-torque permanent magnet brushless motor with a compact structure, larger internal space of a stator and low no-load consumption, and is used for providing power for other mechanical machines.

Description

technical field [0001] The invention relates to a motor, more specifically, to a low-speed and high-torque permanent magnet brushless motor. Background technique [0002] The common problems in ordinary motors are due to structural reasons, which make the equipment unable to perform well. The first is the stator structure. The grooves limit the number of winding turns of the copper wire, which makes it impossible to increase the strength of the magnetic field of the inductor and the current and voltage. At the same time, it cannot overcome the influence of temperature changes, resulting in high power loss and waste of resources. [0003] In addition, the structure of the rotor also has problems. In addition to naturally offsetting the magnetic flux leakage of the groove, the balance factors such as the centrifugal force of the rotor rotation, the accelerated wear of the left and right two-end bearings and the cutting of the magnetic force line caused by the impact make the r...

AI Technical Summary

Problems solved by technology

[0002] Common problems in ordinary motors are due to structural reasons, causing the equipment to not perform well

The first is the stator structure. The grooves limit the number of winding turns of the copper wire, which makes it impossible to increase the strength of the magnetic field and current and voltage of the inductor. At the same time, it cannot overcome the influence of temperature changes, resulting in high power loss and waste of resources.

[0003] In addition, the structure of the rotor also has problems. In addition to naturally offsetting the magnetic flux leakage of the groove, the balance factors such as the centrifugal force of the rotor rotation, the accelerated wear of the left and right two-end bearings and the cutting of the magnetic force line caused by the impact make the real technical structure of the motor only 30%. The effective utilization rate of the torque and speed cannot be solved even if there is speed

At the same time, the main high-current and DC motors in the motor generally have a transverse magnetic field structure. Due to the limitation of the winding, the phenomenon of magnetic flux leakage is common. At the same time, the stator and the rotor form the excitation power supply, forming a magnetic field that cancels each other, resulting in the absence of the magnetic field, rapid heating, and a large amount of loss. power supply, the speed drops, and the efficiency becomes lower

Existing permanent magnet motors have dynamic balance problems such as excessive loss at no-load and large rotational torque fluctuations, resulting in high power loss and wasting limited energy resources.

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