High-precision low-fluctuation permanent magnetic brushless servomotor for solar tracking system

Abstract

The invention relates to a high-precision low-fluctuation permanent magnetic brushless servomotor for a solar tracking system, which comprises a machine shell as well as a stator and a rotor in the machine shell, wherein the stator comprises a stator core fixed on the inner wall of the machine shell and a stator winding; the rotor comprises a main shaft and a rotor core; the outer circumference of the rotor core is sleeved with an annular magnetic pole consisting of radial magnetized magnetic steels which are evenly arranged along the circumferential direction and adjacent oblique angled magnetized magnetic steels; one radial magnetized magnetic steel and two adjacent oblique angled magnetized magnetic steels in the annular magnetic pole form a rotor magnetic pole; the radial magnetized magnetic steels are main magnetic poles; and the two adjacent oblique angled magnetized magnetic steels on both sides are auxiliary magnetic poles. Radial and oblique angled mixed anisotropic magnetized magnetic poles in the annular magnetic pole of the rotor ensure that the motor can also remarkably improve air gap flux density waveform of the motor even if the even air gap is adopted, obtain a sinewave magnetic field, does not reduce power output, can also reduce moment fluctuation, and improve the precision of the solar tracking system. The motor can perform steady operation with high efficiency, low fluctuation, low noise, quick response and high precision.

Description

technical field [0001] The invention relates to a high-precision and low-fluctuation permanent magnet brushless servo motor (PMBLSM) for a sun tracking system, belonging to the technical field of motors. Background technique [0002] Photovoltaic power generation can provide sustainable energy for human beings and protect the living environment, but its low power generation efficiency and relatively high power generation cost restrict its large-scale application. The sun tracking system is designed for the application of solar photovoltaic power generation that needs to track the sun in real time. The basic function is to make the photovoltaic array rotate with the sun to achieve high-precision sun tracking. The stability and reliability of the automatic sun tracker has always been the main problem that has not been applied on a large scale, and the performance of the driving motor is one of the keys. At present, the motors used in domestic and foreign sun tracking systems ...

AI Technical Summary

Problems solved by technology

At present, the motors used in domestic and foreign sun tracking systems are basically permanent magnet DC motors, which have high power consumption, low efficiency, poor electromagnetic compatibility, high noise, large torque fluctuations, poor linearity, low overload capacity, commutator sparks, and electric current. Brush wear and poor reliability and other defects, and the system reliability is poor, tracking error is large, and the cost is too high

Performance is very important to improve the quality of solar automatic tracking system. At present, the permanent magnet brushless DC motor (PMBLM) under research and development at home and abroad, its armature excitation is a "non-circular jumping" rotating magnetic field, which has a large rotational speed. Torque fluctuations and narrow speed regulation range affect the motor's high efficiency, wide speed regulation, stable and low-noise operation

[0003] In view of the defects of large power consumption, low efficiency, and large torque fluctuations in the current motors used in sun tracking systems, it is urgent to design a high-precision and low-fluctuation motor for sun tracking systems.

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