Low noise fast response permanent magnet DC brushless motor for constant wind control

Abstract

The invention provides a low noise fast response permanent magnet direct current brushless motor for controlling constant air volume, which comprises a shell, a stator and a rotor in the shell, wherein the stator comprises a stator iron core and a stator winding which are fixed on the inner wall of the shell, the rotor comprises a main shaft and a rotor iron core, the external circumferential direction of the rotor iron core is evenly fixed with rotor magnetic poles which comprise radial magnetized magnetic steel and tangential magnetized magnetic steel, the radial magnetized magnetic steel is a main magnetic pole, and the tangential magnetized magnetic steel which is arranged between adjacent main magnetic poles is a side magnetic pole. Or, the inner circumferential direction of the rotor iron core is evenly embedded with built-in radial magnetized rectangular strip magnetic steel which is the main magnetic pole, and the tangential magnetized magnetic steel which is arranged between adjacent main magnetic poles is the side magnetic pole. The low noise fast response permanent magnet direct current brushless motor gathers magnetic through two ways of radial and tangential direction, thereby observably increasing the air gap flux density, greatly reducing the mechanical time constant, increasing fast response, controlling the constant air volume in a high performance, which leads a motor to steadily operate in high efficiency, saving energy, low fluctuation, low noise, frequent starting and rapid response, and the low noise fast response permanent magnet direct current brushless motor can achieve the miniaturization and lightening of the motor.

Description

technical field [0001] The invention relates to a low-noise and quick-response permanent magnet DC brushless motor for constant air volume control, belonging to the technical field of motors. Background technique [0002] AC induction motors have been widely used in heating, ventilation and air conditioning systems, ie HVAC applications. AC induction motor fans are also increasingly used for constant air volume control. [0003] Usually AC induction motor fan constant air volume control adopts two methods: [0004] (1) The speed of the AC induction motor fan is constant. With the change of the environment, dust and other loads, the air supply system of the fan is controlled by adjusting the baffle and valve opening of the inlet or outlet to adjust and maintain a constant air volume, and its input power is large. , and a large amount of energy is consumed in the closing process of the baffle and valve, and the opening of the air regulating valve is controlled to realize the...

AI Technical Summary

Problems solved by technology

The permanent magnet DC brushless motor (BLM) has many advantages, but the armature excitation is a "non-circular jumping" rotating magnetic field, and there is a large torque fluctuation. At the same time, the permanent magnet brushless motor for constant air volume control has mechanical Defects such as poor characteristics, small starting torque, low overload capacity, poor linearity, slow response and narrow speed range affect the smooth and low-noise operation of the motor, making it difficult to realize industrialization

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