Motor with strong weak air-gap field in alternative distribution

Abstract

The invention provides a motor which has low cost, saves energy, has high efficiency, is self-starting, has no blocking, is not asynchronous and has no torque pulsation, wide application range and strong weak air-gap field in alternative distribution. The motor is designed based on the principle that like poles repel and unlike poles attract in magnetic field, the stator (or rotor) adopts magnets which are in the same size and in uniform distribution, and the corresponding rotor (or stator) adopts magnets which are not in the same size, wherein small magnets deflect the same polar distance in the same direction, or the corresponding rotor (stator) adopts magnets which are in the same size, wherein a small number of symmetrical magnets deflect the same polar distance in the same direction; or the stator and rotor all adopt magnets which are not in the same size, wherein small magnets deflect the same polar distance in the same direction; or the stator (or rotor) adopts electromagnets which are in the same size and in uniform distribution and windings of all phases are on and off in turn, and the corresponding rotor (or stator) adopts magnet which does not deflect. The strong weak air-gap magnetic field in alternative distribution along circumference 'strong weak strong weak......, strong strong weak strong strong weak......, strong strong strong weak strong strong strong weak.......' is formed between the stator and rotor, thus the motor can be self-starting and can operate stably.

Description

technical field [0001] The invention relates to a rotating electric machine which can be used not only as a generator but also as a motor. When used as a generator, it can be used as an AC generator or a DC generator; when used as a motor, it can be used as an AC motor or a DC motor. Background technique [0002] A rotating electrical machine is an electromechanical energy conversion device manufactured based on magnetic energy to generate electricity and electric energy to generate magnetism. 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 field needs to absorb reactive po...

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 traditional 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 occurs during commutation; ② Poor reliability, short life, Difficult to maintain; 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 torque ripple limits the application of brushless DC motors

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