High speed annular axial multi-pole magnetic rotor brushless motor
A brushless motor, multi-pole magnetic technology, applied in the direction of magnetic circuit rotating parts, magnetic circuit shape/style/structure, etc., can solve the problems of unstable operation, small surface magnetic field, and easy generation of dead ends of the motor, and achieves magnetoelectricity. Good characteristics, good magnetic field strength, stable operation
Inactive Publication Date: 2013-12-18
ZHEJIANG HECHAO MOTOR
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Problems solved by technology
[0003] At present, the permanent magnet in the middle of the rotor of a large-power motor is assembled from multiple pieces, and it is easy to fall off under high-speed operation. Moreover, the same material has a small surface magnetic field, and the magnetic field of each pole is uneven. The motor is prone to dead angles, and the electromagnetic waveform is easy. Distortion, unstable operation, and the output efficiency of the motor is only 60%-70%
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[0016] Below in conjunction with accompanying drawing, the present invention will be further described with specific embodiment, see figure 1 —3: A high-speed annular radial multi-pole magnetic rotor brushless motor, including a casing 10, a rotor 11 and a stator 12, the rotor 11 is sleeved on the drive shaft 14, wherein the rotor 11 is sleeved with a circular ring Ferrite 13, ring-shaped ferrite 13 is set to 8 poles, the specific value of the length of ring-shaped ferrite 13 is 50mm, the specific value of the diameter of ring-shaped ferrite 13 is 70mm, ring-shaped A specific value of the thickness of the ferrite 13 is 10 mm. The permanent magnet in the middle of the motor rotor is in the shape of an integral ring. For high-power brushless motors, the use of this large-size ring-shaped ferrite 13 is a technological breakthrough. Not only the surface magnetic field strength of a single radial multi-pole magnet is one to Good performance, uniform magnetic poles and no dead zone...
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The invention belongs to the technical field of motors and particularly relates to a high speed annular axial multi-pole magnetic rotor brushless motor. The motor comprises a machine case, a rotor and a stator. A driving shaft is sleeved with the rotor, wherein the rotor is sleeved with annular ferrite, eight poles are set on the annular ferrite, the length of the annular ferrite is 35-60mm, the diameter of the annular ferrite is 69-72mm, the thickness of the annular ferrite is 10-15mm, and thirty six grooves are evenly formed in the inner wall of the stator. A permanent magnet in the middle of the rotor of the motor is in an integral type annular shape, magnetic field intensity uniformity of the single radial multi-pole magnet is good, the magnetic poles are uniform without the dead area phenomenon, the motor is started without a dead corner and easily assembled, when the motor is operated, magnetic sheets cannot be loosened and fly out, magnetoelectricity property is good, sine waves are completely achieved, the motor is stably operated, and the output efficiency of the motor can achieve 70%-80%.
Description
technical field [0001] The invention belongs to the technical field of motors, in particular to a high-speed annular radial multi-pole magnetic rotor brushless motor. Background technique [0002] It has been more than 200 years since electromagnetic theory has been applied to motor practice. During this period, electric drive devices have been continuously introduced, and a mature technical series of AC asynchronous motors, DC synchronous motors, and permanent magnet motors has been formed. The application of motors has greatly improved productivity and product quality, greatly facilitated automatic control and remote control, and greatly reduced heavy physical labor. Various motors have become indispensable in industry, agriculture, science and technology, national defense and people's daily life. Indispensable source of survival and development motivation. [0003] At present, the permanent magnet in the middle of the rotor of a large-power motor is assembled from multip...
Claims
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IPC IPC(8): H02K1/27
Inventor 孙仁达
Owner ZHEJIANG HECHAO MOTOR