Magnetic unit, its magnetic array, motor, servo device and driving device

Abstract

The invention provides a magnetic group unit, a magnetic array, a motor, a servo device and a driving device. The magnetic group unit includes a main magnetic source, a first auxiliary magnetic source, a second auxiliary magnetic source, a third auxiliary magnetic source, and a fourth auxiliary magnetic source. The first auxiliary magnetic source, the third auxiliary magnetic source, the second auxiliary magnetic source and the fourth auxiliary magnetic source are sequentially arranged along the circumferential direction of the main magnetic source. The first auxiliary magnetic source and the second auxiliary magnetic source are distributed on both sides of the main magnetic source along the width direction of the main magnetic source; the third auxiliary magnetic source and the fourth auxiliary magnetic source are distributed on both sides of the main magnetic source along the length direction of the main magnetic source side. The magnetization direction of the magnetic group unit is roughly set along the normal direction of the equivalent plane of the working surface of the main magnetic source. The first auxiliary magnetic source and the second auxiliary magnetic source press the main magnetic source to the non-working surface of the main magnetic source. The three auxiliary magnetic sources and the fourth auxiliary magnetic source press the first auxiliary magnetic source and the second auxiliary magnetic source to the non-working surface. The magnetic group unit is fixed by a fixing piece. It is beneficial to improve the stability of fixing the magnetic group unit.

Description

technical field [0001] The invention relates to a magnetic group unit, its magnetic array, a motor, a servo device and a traveling device. Background technique [0002] The motor is generally composed of stator, rotor, bearing, casing, end cover and so on. The rotor of the traditional brushless DC motor is composed of permanent magnets with a certain number of pole pairs embedded on the surface of the iron core or embedded in the iron core. Permanent magnets are mostly made of rare earth permanent magnet materials with high coercivity and high permeability magnetic induction density such as NdFeB. The role of the permanent magnet of this rotor is similar to that of the permanent magnet used in the brushed motor, both of which establish a sufficient magnetic field in the motor air gap. The difference is that the permanent magnet in the brushless DC motor is installed in the rotor. above. [0003] In the traditional motor, the magnetic array composed of permanent magnets la...

AI Technical Summary

Problems solved by technology

[0003] In traditional motors, the magnetic array composed of permanent magnets lacks self-shielding and has serious magnetic flux leakage, which reduces the output power of the motor

Moreover, the surface magnetic density of the magnet is low, the utilization rate of the magnet is low, and the working efficiency of the motor is reduced

There is also a low sine of the air gap flux density, which affects the stability of the motor rotation

Compared with traditional motors, the magnet utilization rate of the Halbach array motor has been improved, but the magnet amount of the Halbach magnetic array is large, which increases the weight of the motor, and the magnetic field strength on the surface of the magnet is not uniform, and the magnetic field strength in the middle of the magnet is insufficient. , affecting the output power of the motor

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