Permanent magnetic push-pull brushless motor

Abstract

The invention provides an energy-saving effective permanent magnetic brushless rotation motor which starts and runs stably and has low cost. The motor owns two air gap magnetic fields at the magnetic poles of two ends; the deformed rotor permanent magnet or stator electromagnet leads the rotor magnetic pole (or stator magnetic pole) to be staggered by a certain of pole distance at the air gap magnetic fields of two ends; furthermore, the air gap magnetic field at one end of the motor is led to be less than the air gap magnetic field at the other end by technical means, thus leading the motor to keep directional rotation without a starting device. The rotor magnetic poles are intermittently arranged in pairs according to N, S and the like. The stator can be a conversion-typed stator and a commutation-typed stator; all coils at one end of the conversion-typed stator have the same polarity (N-pole or S-pole; the polarity of the coils at the other end are all S-pole or N-pole); the polarity of the magnetic pole of the commutation-typed stator coil is intermittently arranged in pairs according to N, S and the like; and the magnetic pole of the alternating current commutation-typed stator is intermittently arranged in pairs according to N, N, S, S and the like. The quantity of the rotor magnetic poles and the stator magnetic poles is configured according to the proportion of 1:1 or 1:2 or 2:3.

Description

technical field [0001] The invention relates to a permanent magnet brushless rotating electrical machine, which can be used not only as a generator but also as a motor. Background technique [0002] A rotating electrical machine is an electromechanical energy conversion device manufactured based on the principles of magnetic energy generating electricity, electric energy generating magnetism, and the principle that magnetic poles with the same name repel each other and magnetic poles with different names attract each other. There are many types of modern motor products and are widely used, but there are more or less defects in the existing motors. For example: Although the AC asynchronous motor has the advantages of simple structure, reliable operation, long life, low cost and easy maintenance, compared with the DC motor, it has poor speed regulation performance, small starting torque, low overload capacity and efficiency, and its The generation of the rotating magnetic fie...

AI Technical Summary

Problems solved by technology

For example: Although the AC asynchronous motor has the advantages of simple structure, reliable operation, long life, low cost and easy maintenance, compared with the DC motor, it has poor speed regulation performance, small starting torque, low overload capacity and efficiency, and its The generation of the rotating magnetic field needs to absorb reactive power from the grid, so the power factor is low, and a large amount of electric energy is virtually lost

Although synchronous motors have high working efficiency, low noise, and small torque fluctuations, they are difficult to start and prone to out-of-step and stalled problems.

Switched reluctance motors have simple structure, reliable operation, good starting performance, and good speed regulation performance, but have the defects of large torque ripple, high noise, and low power density and efficiency compared with permanent magnet motors.

Although the brushed DC motor has the advantages of large starting torque, fast response, low noise, high operating efficiency, and good speed regulation performance, its disadvantages are also obvious: ① Electromagnetic interference is generated when commutating; ② Poor reliability, short life, and maintenance Difficult; ③ Loud noise

The traditional brushless DC motor not only has the same performance as the brushed DC motor, but also relies on electronic commutation, eliminating the brushes and commutators. The brushless DC motor system has a wider speed range, more stable operation, and a large starting torque. , strong overload capacity, high efficiency, small size, and long life, but a starting device is required, and there is a problem of torque ripple, which limits the application of brushless DC motors

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